91 LSC, bigger air intake.

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alm450

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I see lots of stuff about upgrading to mass air, but dont' think I want to change sd system.
Do they make a larger bore sd intake?
I saw a 70 mm mas air for sale on ebay, but don't know if I want to mess around with the wires to change to mass air. Frail lincoln wires, I'm afraid the computer will shut down. LOL
I would also like to change the throttle body to a 70 mm to match.
91's are sd right ?
Out of curiousity, do cold air intakes work with sd systems?
Thanks
 
Mark VII's are all SD, AT least 87-92 that I now of. Most people are going to tell you converting to mass air will be you best performance option. However I believe some power gains can be gained with SD. I wouldn't put a bigger TB on without the mass air conv. I think it'll do less than good IMO. 87-88 mustangs were SD before converting. That cold air system should work. I made my own.
 
If you put a bigger throttle body on, the speed density computer won't recognize it.
 
The stock intake is good to around 275hp. Until you get that kind of power you are better off using your money elsewhere.

As for SD, you can get pretty far with performance using the stock computer. Once you start messing with the cam you either need to go to MAF or get a custom tune of your SD. Either way it sounds to me like it would really be a waste of time, money, and effort to go to MAF at this stage.

As for the TB, you can get pretty far with stock there, too. No need to upgrade that until you are really making some power. If you would like suggestions of good places to start finding more performance, just ask and we'll point you in the right direction.
 
OK I'm all ears
I'll stick with stock sd system and tb.
What else do I do.
I'm thinking cold air to start, what else?
I'm not looking for a superfast streetrod, just some moderate gains.
What is stock horsepower, around 225?
I'm shooting for 250 or so, and not spending gobs of money.
Thanks
 
alm450 said:
OK I'm all ears
I'll stick with stock sd system and tb.
What else do I do.
I'm thinking cold air to start, what else?
I'm not looking for a superfast streetrod, just some moderate gains.
What is stock horsepower, around 225?
I'm shooting for 250 or so, and not spending gobs of money.
Thanks
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I just said not to waste your time on the intake; the stock one is good for about 275hp. Since you have the H.O. motor, you are starting at 225hp from the crank. First thing to do is a regular tune-up. Plugs, wires, cap, rotor, bump the timing, fuel filter, Seafoam, air filter, PCV valve, coolant flush, brake flush, tranny flush, tranny filter, and remove the air silencer. I know that sounds like a lot, but the last thing you want to do is throw money at upgrades and not have money to repair a standard part that you've overlooked.

Once you are there you may have already freed a bit of performance you didn't even know you had. From there you can do simple things like a full exhaust, underdrive pulleys, and rear-end gears. Another inexpensive step that can net a few horses is going to an electric fan. You said you aren't looking for gobs of power, so I will refrain from suggesting nitrous, heads, cam, or boost. This is just a quick start off of my head, I am sure others will chime in and you will have questions.
 
Where else can you go and be told how to increase HP for less than $100.00?

ALM450. After you do what Josh said, you'll be ready for the track (or at least ready to pass them SOBs in their SUVs).
 
I recommend the pulleys as one of the 1st. They're cheap, $75 bucks for ASPs, and easy to install. I notised the power in the entire RPM range. Even noticed the trans shifted firmer, less drag. Better gas mileage. And I experienced no problems as a result. No over-heating, or charging problems, and I did the traffic thing plenty. I had a big stereo too, did have a farid to help though. Removing the silencer is a must, and it don't cost a thing. K&N filter too. The fan is a great idea too, cheap and noticable power gains.
Tune it first. The intake tube on the Mark is so small too, a stock Mustang one is better, 87-88, or make your own its pretty easy.
 
Give it a tune up, fuel filter, stock intake system is really a cold air set-up - just doesn't look pretty. Remove the silencer in the fender (along with the sound deadener stuff or it'll get sucked into the air filter housing!!) and slap on a Mustang SD tube and you've got a cold air kit for a few bucks. Advance the timing to 10 degrees, set your TPS to .99v. This should make you feel an improvement.

Other stuff like pullies (gave me 2 tenths and 3mph in the quarter way back in the day), exhaust, rear gears would wake that car up big time.

Stock TB, upper/lower intake, heads are all fine for that setup. Save your cash there and leave 'em be.
 
I thought 10 degrees was stock? Or did you mean stock? Funny about the wheel ins. I sucked a load into my filter.
 
I dunno what stock is (I haven't had a stock Mark in years until my 92 I picked up this past Labor Day lol), but both my 92 and my friend's 92 LSC SE were at 0 when we bought them - probably so whoever had it could run regular gas...?
 
Strange. No 5.0.s were supposeto be at 0. Heck 6 degrees was common even in 139hp Mustang II days. I'm almost positive 10 degrees is right and many do 14 on stock H.O.s. Well tuned of course. I never even touched mine. 220000 miles, only a water pump and alternator. Thats as far as the motor goes. Did tons of other stuff.
 
Well with the prices of gas around here over the summer, it wouldn't surprise me that these people retarded it to run 87 octane lol
 
NYC LSC said:
Well with the prices of gas around here over the summer, it wouldn't surprise me that these people retarded it to run 87 octane lol
Click to expand...
If heard a few people say that, can't say I would ever do that. Kinda funny a guy up the road from me traded in his big diesel chevy for a big 8100. Then gas shot up. He had the dealer retard the timing:shifty: . Didn't sound right to me neither. I don't think he needed the good gas, I think it was an effort to inprove mileage. Can't see how hurting top performance saves gas. An efficient motor saves gas.
 
Stock is 10 deg. in my memory as well. I don't see how retarded timing could help that much. If you're pinging enough to need 91, you've got other problems. The car was made for 87.
 
Could be, I guess. Who knows with people. I mean, the car had the STOCK hoses and plug wires on it for God sakes. Dated stamped and everything.
 
NYC LSC said:
Could be, I guess. Who knows with people. I mean, the car had the STOCK hoses and plug wires on it for God sakes. Dated stamped and everything.
Click to expand...

Reminds me of Christina's first car. 92 Olds Cutlass Supreme with ~170K on it; stock plugs and wires. And we wondered why it was starting to run rough. :eek:
 
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