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LS could use more power...

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Posted by: blk04lse

Alright, I will throw it out there.... for the price, especially the V8, the car is a bit light in power... Granted, this is not an AMG, S4 or CTSV, but for a starting price in the mid - upper $40,000 range for the v8, 320 hp / 320 + in tq is not too much to ask for since the car is around 3800 + pounds. Something to give an a little extra love when you accelerate.

To do so, the 4.6L would have been fine as we see it is being used on the same 5 speed auto (different bell housing/other externals) in the 05 GT... Granted, even the 03 Mach 1 motor is not "recorded" as making that power, but I am sure Ford could get another 20 hps w/ little effort out of that or the new 05 GT motor...

Anyway, the ride, handling and design is right on, but it would be nice if the car accelerated to reach low 14's and/or 350 hp to run high 13's would have been even nicer....

Granted, it doesn't matter now, so...

Not everyone is into speed and there are cars faster, less expensive cars, but for the price I do not think this is asking too much....



Posted by: whatsupadrian

MODS can get you some power.

LLSOC intake +13rwhp
E-Pac Ground Box +7rwhp
SCT Flasher +14
Catback exhaust +11rwhp
Supercharher +~80??? (comming soon)
NOS +?

Can put an 03-up close to 400hp.



Posted by: Dutch

4.6L is a POS. When you talk money, don't forget that, although the sticker may say $42k for a V8, you shouldn't have to pay more than maybe $33k to buy one.

That being said, more power would still be good, just not through the awful 4.6L. Better choices would be the naturally aspirated or blown 4.2L Jaguar engines. They would actually fit under the hood (unlike a 4.6L) and would bolt up to the tranny (unlike a 4.6L). Lincoln should at least try offering the blown 4.2L on a limited number of LSes. Because everything would (seems like it should at least) bolt right in, it would probably be pretty cheap.



Posted by: jthorn75

also u gotta think to get all that power in those mods with cost u well over 5 grand!



Posted by: eL eS

yeah the SC alone will set you back about 5k. The catback is 650 the llsoc intake about 500 and another 400 to 500 for the sct after you pay for a few more custom tunes or up to 1000 if you buy the sct and the software to make your own tunes.

It could get pricey. I'd rather pay an extra 10k on a factory version of the LS with 400 ponies.



Posted by: eL eS

that 10k would have to include a factory body kit or some sorts nothing obtuse and gaudy though.



Posted by: blk04lse

Dutch - where can you buy a new LS V8 for $33K?

I agree the 4.6L is not the most reliable; however the 03-04 Mach 1 motor w/ forged internals and the 03-04 Cobra motor are the exception...

As far as adding a supercharger, turbo and/or nitrious to the 3.9, unless the motor is torn down and prepped for a power adder, the life span will be short lived...



Posted by: Quik LS

Quote:
Originally Posted by blk04lse
Dutch - where can you buy a new LS V8 for $33K?

I agree the 4.6L is not the most reliable; however the 03-04 Mach 1 motor w/ forged internals and the 03-04 Cobra motor are the exception...

As far as adding a supercharger, turbo and/or nitrious to the 3.9, unless the motor is torn down and prepped for a power adder, the life span will be short lived...
nope - the feelings are the the engine is good for 400hp - the trannie is the weakest link.



Posted by: Joe90804

I just bought a 03 v8 LS I think the HP is adequate but hell if chrysler and GM can put out LUX cars with lots of HP Why can't Lincoln step up to the plate and offer a LUX car with the similar or MORE HP. isn't more better anyways. So if anyone is here from Lincoln and your listening please add another 100 HP to my next LS. thank you and let me know when I can pick it up!



Posted by: blk04lse

If the transmission is good enough for the 05 GT, but is the weakest link on the LS? I would guess the rear end is the weakest link...

LS v8 can handle up to 400 hp... do we have forged internals?



Posted by: Quik LS

Quote:
Originally Posted by blk04lse
If the transmission is good enough for the 05 GT, but is the weakest link on the LS? I would guess the rear end is the weakest link...

LS v8 can handle up to 400 hp... do we have forged internals?
it's not the same trannie in the GT. The LS engineers thought that the trannie would be good for 'around' 340hp or so....



Posted by: eL eS

Quote:
Originally Posted by Quik LS
it's not the same trannie in the GT. The LS engineers thought that the trannie would be good for 'around' 340hp or so....

ha! little did they know it has barely withstood the 210 HP the V6 is supposed to have or at least the V6 that I have.



Posted by: Kevin

The 4.6L is one of the best engines Ford has ever made.

It's in everything from the Crown Vic to the F150, Tbird (late 90's), and more.

200k miles is nothing to this motor, even under abusive driving by taxi, police, construction, etc.

I highly doubt our little 3.9L would ever stand up to long term abuse like that.

With that said - I agree that the LS is underpowered. But because of overhead cams, the 4.6 is about the biggest thing that will fit, and it hardly does (the One Lap of America LS used a 4.6L), fitting it nicely into a production model would be tough.

GM still uses push-rod engines, which is why they can stuff the 5.7L into small cars like the CTS, and have 400hp - stock.



Posted by: blk04lse

According to onlines sources, such as www.fast-autos.net, the 05 GT also uses the 5R55S transmission... Then sources must be wrong, but here is a quote.

"For the first time, Mustang is available with a five-speed automatic transmission.

The 5R55S automatic, also used in the Lincoln LS and Ford Thunderbird, has closely spaced ratios that keep the engine in its power band to produce better acceleration, with a wide ratio that provides remarkably good highway fuel economy. The new powertrain control computer delivers benefits in the transmission, as well as the engine, by precisely controlling shift duration and shift timing. Throttle position, engine speed, load, environmental factors and other parameters guide the transmission shift schedule.

A new electronic interface lets the powertrain control module communicate with the automatic transmission 10 times faster than before. For the first time, powertrain engineers could match transmission controls with other sophisticated features like variable cam timing and electronic throttle control. As a result, the entire powertrain works together to deliver smooth performance.”



Posted by: Quik LS

my bad - should have noticed the '04 in your sig. My 01 is a 5R55N - more in common with the Explorer of the time. I have the 340hp-ish limit.....



Posted by: blk04lse

No problem... Funny though, whether the 5R55N or 5R55S transmission, we all seem to have similar issues w/ the trannies...

So, from what I am gathering, it appears others feel the LS could have used a little more H.P. under the hood, especially w/ the S4, CTSV, G35 Sedan and AMG on the road...

Has anyone on this forum or other owners that you know of spoken w/ Ford Racing, BBK, Holley, Edlebrock, Steeda, Anderson Racing etc., for a broader selection of aftermarket parts, such as a rear end gear, axles, stalls, emission legal/yet modified cams, upgraded heads, mass air meters, etc?



Posted by: dropped74

Quote:
Originally Posted by blk04lse
No problem... Funny though, whether the 5R55N or 5R55S transmission, we all seem to have similar issues w/ the trannies...

So, from what I am gathering, it appears others feel the LS could have used a little more H.P. under the hood, especially w/ the S4, CTSV, G35 Sedan and AMG on the road...

Has anyone on this forum or other owners that you know of spoken w/ Ford Racing, BBK, Holley, Edlebrock, Steeda, Anderson Racing etc., for a broader selection of aftermarket parts, such as a rear end gear, axles, stalls, emission legal/yet modified cams, upgraded heads, mass air meters, etc?

Always want more power. What ever happened to the guy that was working the Turbo!!!!????



Posted by: SurfjaxLS

Quote:
Originally Posted by dropped74
Always want more power. What ever happened to the guy that was working the Turbo!!!!????
I've also been wondering about him, maybe a twin turbo is still just a dream.



Posted by: dropped74

Quote:
Originally Posted by SurfjaxLS
I've also been wondering about him, maybe a twin turbo is still just a dream.

Seems that way, huh!!!



Posted by: eL eS

someone was working on a turbo?



Posted by: Quik LS

yes - he got it up to 7psi - it was a rear mounted turbo - installed behind the rear bumper.

he burned something out, took it off and was planning to re-fit it under the hood.



Posted by: eL eS

jeez was he moving the exhaust. I know you are a serious guy but are you serious... it was in the back.



Posted by: Quik LS

Quote:
Originally Posted by eL eS
jeez was he moving the exhaust. I know you are a serious guy but are you serious... it was in the back.
http://www.lincolnvscadillac.com/sho...ighlight=turbo



Posted by: whatsupadrian

Quote:
Originally Posted by eL eS
jeez was he moving the exhaust. I know you are a serious guy but are you serious... it was in the back.
A lot of people are doing that with the turbos in the back now. The piping to the front acts as an intercooler. The thread is here though...
http://www.lincolnvscadillac.com/sho...ighlight=turbo



Posted by: whatsupadrian

Quote:
Originally Posted by Quik LS
heh beat me to it



Posted by: Quik LS

here's a company that is making some noise about it ...

http://www.ststurbo.com/2_guys_garage



Posted by: eL eS

WOW. That certainly was an eye opener. Thanks. That cat put a lot in to that mod. I wish he would have stayed with that a little longer.



Posted by: Dutch

Quote:
Originally Posted by blk04lse
Dutch - where can you buy a new LS V8 for $33K?

I agree the 4.6L is not the most reliable; however the 03-04 Mach 1 motor w/ forged internals and the 03-04 Cobra motor are the exception...

As far as adding a supercharger, turbo and/or nitrious to the 3.9, unless the motor is torn down and prepped for a power adder, the life span will be short lived...
Here's the math I did when I bought my used LS.

MSRP: $40,600
Invoice: $37,300
Rebates: $6,000 + $1,000
Your price: $30,300

So a new LS V8 would've been $30,300 assuming you paid invoice and financed through Ford for the extra $1,000 rebate. I don't know if the rebates are still that high now.



Posted by: 99 KOBRA

Quote:
Originally Posted by Dutch
Here's the math I did when I bought my used LS.

MSRP: $40,600
Invoice: $37,300
Rebates: $6,000 + $1,000
Your price: $30,300

So a new LS V8 would've been $30,300 assuming you paid invoice and financed through Ford for the extra $1,000 rebate. I don't know if the rebates are still that high now.

I bought my wife a new '04 LS V8 Sport on 1/1/05 for $31K. The MSRP was $41K.



Posted by: lsbit

Yea...That rear mounted turbo stuff is cool. I saw the Two Guys Garage episode just the other day! That is the first time I actually got to see one, even though I read about them last year. That would be something to look into for the LS. The compression ratio being so high, we need as much power as we can get with as little boost as possible. Turbo baby! I was going to post about this yesterday, but the Nyquil kicked in. Glad you guys beat me to it!

As far as the 3.9 taking 400 hp, I would be surprised if it didn't. Most bottom ends will take that much power, as long as it is a nice even flow and not a sudden shock, and not riding along with detonation. The problem is getting it there in the first place. I would feel better sticking 8 psi on the 3.9 if it was at 9.0:1. Every once in a great while, I get a little detonation in my Mustang and I have it tuned right. I would probably blow a head gasket before anything else on that 302, but on the 3.9... I would probably waste my underwear if I heard detonation.

Also, I would have no problems using the 4.6l. They are not my favorite but they have proven to be reliable engines that can take the abuse I would give it with an LS. I wouldn't trust a stock 4.6l 2 cam with 500hp, but I don't want that much power in my LS. Who wants to replace everything in the drivetrain on a monthly basis? I just want a clean, reliable 300 rwhp. You start talking wild power and you need to think about the driveshaft, mounts, suspension, and other stupid things let alone the transmission, rear-end, and engine. Save the big power for the weekend warrior car that weighs 2800-3000 pounds.

We need a limited slip diff too.



Posted by: Dutch

Quote:
Originally Posted by blk04lse
No problem... Funny though, whether the 5R55N or 5R55S transmission, we all seem to have similar issues w/ the trannies...

So, from what I am gathering, it appears others feel the LS could have used a little more H.P. under the hood, especially w/ the S4, CTSV, G35 Sedan and AMG on the road...

Has anyone on this forum or other owners that you know of spoken w/ Ford Racing, BBK, Holley, Edlebrock, Steeda, Anderson Racing etc., for a broader selection of aftermarket parts, such as a rear end gear, axles, stalls, emission legal/yet modified cams, upgraded heads, mass air meters, etc?
You can always regrind the cams. I would bet nobody's done it yet, though.



Posted by: Quik LS

Quote:
Originally Posted by Dutch
You can always regrind the cams. I would bet nobody's done it yet, though.
the owner of the LLSOC did re-grind his cams and ported the heads - 36hp gain. had a problem with the heads been cut too deeply and had a water jacket leak.....



Posted by: Dutch

Interesting. Not great gains, but he probably had to do alot of guessing as to which cam provide would be best. That guy's a real trail blazer. Did he have any sort of chip or dyno tune to ensure he got the full benefit of his work?



Posted by: Quik LS

Quote:
Originally Posted by Dutch
Interesting. Not great gains, but he probably had to do alot of guessing as to which cam provide would be best. That guy's a real trail blazer. Did he have any sort of chip or dyno tune to ensure he got the full benefit of his work?
this was long before the PCM was cracked.



Posted by: eL eS

Quote:
Originally Posted by Quik LS
here's a company that is making some noise about it ...

http://www.ststurbo.com/2_guys_garage

damn cant believe I missed that program. I always miss the good shows. Looks like they reran the program a lot too. I was probably under the hood each time the aired it.



Posted by: eL eS

Man that article on the STS turbo is great. I havent bothered to look em up yet though. Does anyone know what they cost?

From reading what I have read so far it sounds like a great system and now that the PCM can be tuned this thing and the might offer up some serious ponies.



Posted by: blk04lse

A few things...

1. Besides the tire and spare, where can we lose weight w/out deminishing the integrity of the car? On the car, not the driver... ha ha ha

2. $4000 - $5000 + for a supercharger is ridiculous, especialy when you can get a Powerdyne (6 lbs) under $2000 for a 5.0 L Mustang... An option is the pick up a used supercharger head unit, but fabricate the plumbing and brackets.... May want to increase the fuel injector size (if available) and install a fuel pressure regulator...

3. Only 36 hp out of port heads and custom cams???? Man, that is where NMRA Mustang engine builders/modifiers come in like Ed Curtis or Rick Anderson, where they can port and freshen up the heads, and create custom cams that are built to match the flow rate of the heads (they have software that spits out the cam specs based on all of the variables of the moto and setup of the car - they do make emissions legal cams too).

4. Unless I am mistaken, I do not believe there are Stalls out there for this car... Are there steeper rear end gears? Will the 05 GT aftermarket gears fit? And we do not have limited slip?



Posted by: Quik LS

Quote:
Originally Posted by blk04lse
1. Besides the tire and spare, where can we lose weight w/out diminishing the integrity of the car? On the car, not the driver... ha ha ha
Not that I know of. I mean you can pull the rear seat out (it's fairly light).

Quote:
Originally Posted by blk04lse
2. $4000 - $5000 + for a supercharger is ridiculous, especially when you can get a Powerdyne (6 lbs) under $2000 for a 5.0 L Mustang... An option is the pick up a used supercharger head unit, but fabricate the plumbing and brackets.... May want to increase the fuel injector size (if available) and install a fuel pressure regulator...
The supercharger I am testing should be half that in price.

Quote:
Originally Posted by blk04lse
3. Only 36 hp out of port heads and custom cams???? Man, that is where NMRA Mustang engine builders/modifiers come in like Ed Curtis or Rick Anderson, where they can port and freshen up the heads, and create custom cams that are built to match the flow rate of the heads (they have software that spits out the cam specs based on all of the variables of the moto and setup of the car - they do make emissions legal cams too).
remember - that was back in the day before we could adjust the tuning.

Quote:
Originally Posted by blk04lse
4. Unless I am mistaken, I do not believe there are Stalls out there for this car... Are there steeper rear end gears? Will the 05 GT aftermarket gears fit? And we do not have limited slip?
another LLSOC member is working on creating a torsen rearend.



Posted by: Quik LS

Quote:
Originally Posted by eL eS
Does anyone know what they cost?
between $3,700 - $5,000 - without tuning.



Posted by: eL eS

hmmm turbo or sc?



Posted by: Quik LS

Quote:
Originally Posted by eL eS
hmmm turbo or sc?
SC will be eaiser, the turbo has more hp potential. I think either will produce more than we can handle - so I'm going with the easiest to maintain and lowest initial cost....



Posted by: eL eS

yeah despite their propaganda about it being safe mounted low and to the rear the jury is still out on the turbo gimmick. Fortuneately or Unfortuneately their is still time to decide.



Posted by: Putter-GLHT

Not to highjack the thread, but how is the getrag 5sp used in the v6 models? I've been serioiusly considering my next project using a 3.0 v6 5sp LS with a turbo....

I know quite a bit about turbocharging and would very much have been wanting to play with a 24valve 3.0, an awesome motor by any means. I figure a solid 400hp on street gas should be a walk in the park. Anyone know where I can find more info on the manual transmission, as I could not find a search button in the forums.



Posted by: Quik LS

Quote:
Originally Posted by Putter-GLHT
Not to highjack the thread, but how is the getrag 5sp used in the v6 models? I've been serioiusly considering my next project using a 3.0 v6 5sp LS with a turbo....

I know quite a bit about turbocharging and would very much have been wanting to play with a 24valve 3.0, an awesome motor by any means. I figure a solid 400hp on street gas should be a walk in the park. Anyone know where I can find more info on the manual transmission, as I could not find a search button in the forums.
well - apparently the reason the V8 did not use the 5spd was that it couldn't handle the v8 tourque......



Posted by: eL eS

man the LS would look so good running the GT SCCA Circuit. I get sick of seeing the CTSV just lay it down. We need equal representation.

I did read in automotive that the head of SVT, Hu Tang, is looking to start tuning Lincoln and Mercury vehicles. They would not share the SVT name but they do have thier sights set on the luxo brands.



Posted by: Putter-GLHT

Anyone have a model number for the trans? I can get ford part numbers at work but that doesn't do me much.



Posted by: eL eS

5r55n for the 00 and iirc the 01



Posted by: Putter-GLHT

I was looking more for the manual model number, as I know what the auto is.



Posted by: 2k2ls

there was the one ls (black) that was turbo charged. It ended up blowing after over-boosting (or something). I think it was here on the forum.



Posted by: Quik LS

Quote:
Originally Posted by 2k2ls
there was the one ls (black) that was turbo charged. It ended up blowing after over-boosting (or something). I think it was here on the forum.
post #23 in this thread..... about a page back.



Posted by: SurfjaxLS

I think onebadls is the guy we need to talk to about turbos, or at least his project.

http://www.lincolnvscadillac.com/sho...ght=twin+turbo



Posted by: Quik LS

Quote:
Originally Posted by SurfjaxLS
I think onebadls is the guy we need to talk to about turbos, or at least his project.

http://www.lincolnvscadillac.com/sho...ght=twin+turbo
I believe there is another post where he sold the LS he had for the project....



Posted by: Putter-GLHT

He said in that same thread he sold it to a friend.



Posted by: SurfjaxLS

I guess I missed that, my bad.



Posted by: rocket5979

Quote:
Originally Posted by Dutch
4.6L is a POS. When you talk money, don't forget that, although the sticker may say $42k for a V8, you shouldn't have to pay more than maybe $33k to buy one.

That being said, more power would still be good, just not through the awful 4.6L. Better choices would be the naturally aspirated or blown 4.2L Jaguar engines. They would actually fit under the hood (unlike a 4.6L) and would bolt up to the tranny (unlike a 4.6L). Lincoln should at least try offering the blown 4.2L on a limited number of LSes. Because everything would (seems like it should at least) bolt right in, it would probably be pretty cheap.

The 4.6 SOHC is debatably the BEST engine Ford ever produced! I have no idea where you got your info from but I suspect that person didnt know what they were doing or talking about. I have seen SOHC 4.6's with the stock longblock push out 420+ rwhp on a Kenne Bell 1.7 supercharger @ 9# boost and hold up to it for a long long time with a good tune. The 3.9 DOHC engine in the LS's is a good engine but I would rather have a 4.6 anyday. The reason being is that there is a TON of aftermarket out there and we all could be pushing 500+rwhp in no time(we wont mention the tranny trying to hold up to that). I checked allot of engine rotating assembly manufacturers a while back for these LS's to see if there was anything offered in the form of forged or billet pistons or connecting rods. I got a quote from Oliver, whom is expensive anyways, that totally turned me off to even trying to forge the 3.9 anytime soon. I am no expert when it comes to the LS, but it is my understanding that they wanted to be able to bottom load the engines into these cars to keep production speed up. They needed an engine that would easily fit into the engine bays of these cars and slide into the bottom. If they were top loaded like I think the one from the One Lap of America car(or whatever its name is) was then they could fit a bigger engine. Bottom line is that I would take the 4.6 SOHC purely for its design and moddability anytime over the 3.9 DOHC. Of course I would be singing a different tune if there were any aftermarket actually available for the 3.9...



Posted by: Putter-GLHT

4.6 Is definatly one of the best engines ford has ever made. I work on these things every day and I've only seen 2 4.6 engines fail. One 54,000 miles on factory oil and filter, and the other in a police car with a loose drainplug driven with no oil until lockup, then cooled and driven to the dealership with no oil later that day.

Now, while working on both engines, I almost wonder if the 3.9 isn't loosley based off of a 4.6 if not entirely...? To me the eng config looks like a severely destroked 4.6 4v with a shorter deck and a more expensive intake.



Posted by: Dutch

Quote:
Originally Posted by rocket5979
I have seen SOHC 4.6's with the stock longblock push out 420+ rwhp on a Kenne Bell 1.7 supercharger @ 9# boost and hold up to it for a long long time with a good tune.
I've seen a stock 3.8L V6 do the same thing with turbos...Yes, there are kids running around with 10 second V6 Mustangs.

Anyway, my comments toward the 4.6L aren't based solely on reliability, but on having a crummy torque curve with no bottom end. When my V6 Mustang was in the shop once, the dealer gave me a GT loaner. I'm sure it was a lot faster than my V6, but it sure didn't feel it. The problem was the lack of torque. Same thing with the Marauder. I've driven Crown Vics and Grand Marquis, and a handful of Mustangs with the 4.6L, and I just can't stand that engine.

Also, regarding the reliability issue, they were really bad the first several years. They had lots of problems with valve stem seals or something, and you do see quite a few smoking older Crown Vics/Grand Marquis/Town Cars. I think they fixed this problem before they starting putting the 4.6L in Mustangs, because I haven't seen one of them smoke.



Posted by: Dutch

Quote:
Originally Posted by Putter-GLHT
4.6 Is definatly one of the best engines ford has ever made. I work on these things every day and I've only seen 2 4.6 engines fail. One 54,000 miles on factory oil and filter, and the other in a police car with a loose drainplug driven with no oil until lockup, then cooled and driven to the dealership with no oil later that day.

Now, while working on both engines, I almost wonder if the 3.9 isn't loosley based off of a 4.6 if not entirely...? To me the eng config looks like a severely destroked 4.6 4v with a shorter deck and a more expensive intake.
The 3.9L is a Jaguar engine.

http://www.jagweb.com/aj6eng/v8_performance.html



Posted by: rocket5979

Quote:
Originally Posted by Dutch
I've seen a stock 3.8L V6 do the same thing with turbos...Yes, there are kids running around with 10 second V6 Mustangs.

Anyway, my comments toward the 4.6L aren't based solely on reliability, but on having a crummy torque curve with no bottom end. When my V6 Mustang was in the shop once, the dealer gave me a GT loaner. I'm sure it was a lot faster than my V6, but it sure didn't feel it. The problem was the lack of torque. Same thing with the Marauder. I've driven Crown Vics and Grand Marquis, and a handful of Mustangs with the 4.6L, and I just can't stand that engine.

Well heck if we were talking turbos on the stock bottom end 4.6 then I have seen some pushing more than 600rwhp. I would have to admit that they were probably goign to give up the ghost in a season or less. Comparing a turbo to any other type of FI like centrifugal supercharger or positive displacement supercharger is in some ways comparing apples and oranges. All are blowers, all force air into the intake but the turbo gets its power from a totally different source which really mixes things up quite a bit. So that was our debate on stock for stock engine.

Now lets compare moddability... Well the 3.8 V6 and pretty much any other engine Ford made, except the 302 and maybe the 351W, are nowhere near the level of the aftermarket offered for the 4.6 SOHC and DOHC. That counts for a HUGE piece of the pie! The crummy torque curve can be taken care of with anything from gears to move the powerband lower in the rpm curve, higher stall TC, cams, and so on. I dont mean to pick at you or the 3.9 V8 or anything but it is a surprise hearing that comment about lack of low end torque coming from an LS owner.

BTW- I know that Jaguar made an engine that also displaces 3.9 liters, but is it really the same engine as the 3.9 LS engine through and through? I tried to look that info up about 5 months ago but didnt come up with alot of information.



Posted by: Dutch

Quote:
Originally Posted by rocket5979
BTW- I know that Jaguar made an engine that also displaces 3.9 liters, but is it really the same engine as the 3.9 LS engine through and through? I tried to look that info up about 5 months ago but didnt come up with alot of information.
Yeah, it's the same engine.
http://www.jagweb.com/aj6eng/v8_performance.html
The LS 3.9L is a slightly cheapened Jag 4.0L that has had the bore reduced .05mm for marketing (so Jag buyers get a bigger engine). Also, the Jags have variable valve timing, which the LS didn't get until '03.

On the lack of bottom end, I hear you when you say it's ironic for such a comment to come from a 3.9L owner. However, the LS's 5-speed tranny does a great job at compensating for that. What's 1st gear on a 4R70W? 2.4? 2.4 x 3.27 rear = 7.85 torque multiplication in 1st gear. For an LS, it's 3.25 x 3.31 = 10.76.

The 3.9L in the LS feels a lot bigger than it is. I'd like to see a dyno chart of it. It'd be interesting to compare area under the curve to a Mustang 4.6L.



Posted by: Quik LS

only the block is shared with the Jag.

Most of the sharing between LS and Jag is the DEW98 chassis.

http://www.designnews.com/article/CA86948.html



Posted by: rocket5979

Quote:
Originally Posted by Dutch
Yeah, it's the same engine.
http://www.jagweb.com/aj6eng/v8_performance.html
The LS 3.9L is a slightly cheapened Jag 4.0L that has had the bore reduced .05mm for marketing (so Jag buyers get a bigger engine). Also, the Jags have variable valve timing, which the LS didn't get until '03.

On the lack of bottom end, I hear you when you say it's ironic for such a comment to come from a 3.9L owner. However, the LS's 5-speed tranny does a great job at compensating for that. What's 1st gear on a 4R70W? 2.4? 2.4 x 3.27 rear = 7.85 torque multiplication in 1st gear. For an LS, it's 3.25 x 3.31 = 10.76.

The 3.9L in the LS feels a lot bigger than it is. I'd like to see a dyno chart of it. It'd be interesting to compare area under the curve to a Mustang 4.6L.
I hear ya about the 5 speed tranny helping things. In my 2003 4.6 explorer it really keeps the engine pulling while in the powerband pretty nicely. Gotta love it when a vehicle weighing 4,500 pounds goes 15's stock and can tow a trailer, and have the ability to carry 5 adults and alot of gear comfortably. I really love the 5 speed trannies, I really hope that someone in the aftermarket really gets serious with these things and starts offering more than just an input shaft for these things. Crossing my fingers in hopes that I wont have to do the 4R70W swap.



Posted by: Dutch

Quote:
Originally Posted by Quik LS
only the block is shared with the Jag.

Most of the sharing between LS and Jag is the DEW98 chassis.

http://www.designnews.com/article/CA86948.html
It's a Jag design, which is what he was asking.



Posted by: Quik LS

nope - the program was in development for almost a year before Jag found a use for it.



Posted by: Beamer

Yea, I feel it should have much more power that the 252 my '02 has. At the very least they should of given it close to 300, that would have made me very happy. I'd rather have that '99 gs400 back here at my place and have bought that, it weighed more I believe, but had awesome power bringing it into the low 14's.



Posted by: Quik LS

well - the LS was targeted between the 540i and the 530i - of the day (circa 1999)

it out powered the 530i and out handled the 540i.

there wasn't any of these cars in the category that had 300hp.

the M3 had 333hp - but that wasn't the competition.





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