Grooved Cylinder Heads

[Ed Hall]

Has anyone tried grooving the cylinder heads on our cars like what's pictured below? It's suppose to correct lack of low RPM power and poor throttle response. My 1997 Mark VIII could definitely use some help here. It has excellent high rpm power but low rpm power is poor in my opinion. I wouldn't mind to trade some of that high rpm power for low rpm power. It definitely would work better with the gearing on these cars.

 

[87TTOPGT420]

I could see that creating a hot spot and causing detonation among other things

 

[marked8]

:lol:Waits for Laser:lol:

 

[chris2523]

in my opinion, it is a much better option just to change the gearing.

 

[87TTOPGT420]

in my opinion, it is a much better option just to change the gearing.

Or this

 

[thaywood]

That just looks like somebody took an axe to that head.

 

[LaserSVT]

:lol:Waits for Laser:lol:

I refuse to feed the dumb ass POS troll any more. He knows damn well that hes just stealing the Singh Combustion Chamber Turbulence design and that it does not work.

 

[Ed Hall]

I refuse to feed the dumb ass POS troll any more. He knows damn well that hes just stealing the Singh Combustion Chamber Turbulence design and that it does not work.

Have you tried it? Or are you just burying your head in the sand and saying it doesn't work.

 

[LaserSVT]

Have you tried it? Or are you just burying your head in the sand and saying it doesn't work.

You try it. Ill buy the cut wheel for your grinder. Go ahead, Ill wait. First take the car to the dyno and get a baseline, cant be more than $75. Then all you have to do is take apart your entire motor after its been removed from the car and cut the heads. Dont forget to buy the $400 worth of new gaskets. Prolly will need to mill the heads and block since they are aluminum. There is another $300. After getting it back together take it for another dyno run. Make sure the temps, pressure and humidity is exactly the same. Post up your results.

But I want something in return. If it does not work then get the fock off this board. If it does work I will leave.

Deal?

 

[unity]

Ed, if you feel that your car lacks low power at low RPM, I suggest you look at your IMRCs. If they are both, or one, stuck open you will have that issue.

 

[the1andonlyGR81]

it seems like a giant waste of time to do something that defies logic.

 

[Ed Hall]

Ed, if you feel that your car lacks low power at low RPM, I suggest you look at your IMRCs. If they are both, or one, stuck open you will have that issue.

Thanks for the suggestion. I haven't look at that yet. However, wouldn't a stuck open IMRC cause a CEL?

 

[Right on the Mark]

Thanks for the suggestion. I haven't look at that yet. However, wouldn't a stuck open IMRC cause a CEL?

I get Windstars in all the time that have the IMRC rod bushings buggers up and the rods not in and no CEL.The IMRC pod is still moving but the plates are not. Don't know if Gen2 mk8's are the same.

 

[Lownslowlsc]

Wow, you have such horrible torque down low yet are still able to tow thousands of pounds.

 

[Ed Hall]

Wow, you have such horrible torque down low yet are still able to tow thousands of pounds.

Yeah, it would be nice to have a little more oomph at low rpm's so I don't have to downshift as often. I keep my speeds around 50 mph with the engine clocked in at around 1500 rpm's so low rpm torque is really needed for my type of use. I don't use 3rd gear because I've heard that constant lock up torque converter slippage is programmed when using that gear.

 

[danny_holtermann]

i would suggest taking off your imrc's and replace the bearings on them and clean them up first before you do something so stupid as to take your heads off to just try something

 

[danny_holtermann]

also imrc's are suppose to open up at 3200 rpm on gen 1's when my car ran they wouldn't open till 4000, i took the motor apart and lo and behold the bearings where terribly shot, imrc clean, but bearings toast

 

[94m5]

This will all end in tears, I just know it.

 

[AndyT]

This will all end in tears, I just know it.

That's fine. As long as it isn't one of our cars. I think we would all get a good laugh out of it in the end....

 

[LSC HUNTER]

Laser, well done.

 

[Ed Hall]

From the following post:
http://forums.turbobricks.com/showthread.php?t=74370

Over the last two years I have grooved heads for more than twenty engines, I lost count. Most of these are performance or race only Generation I, II or III SBC. At first the results appeared to be rather vague, until I realized what was happening. The best way to describe it is: this modification improves the quality combustion to a point that it changes the characteristics of the engine. The limits of the engine are altered, the modification allows higher compression with out detonation, lean burn and ignition advance limits are changed and warm up periods are reduced. Fuel enrichment functionally can be reduced or eliminated completely.

Most of my work is on drag race engines designed to operate in 5000 to 7500 RPM range. The camshafts provide long overlap periods that can ruin idle quality and low RPM power. This modification restores the idle quality and power. This is a big plus for people that operate engines outside of there designed RPM range.

Additional benefits: oil & plugs runs cleaner, quit smooth engine operation under heavy loads at any RPM, engine runs cooler, reduced fuel consumption; I have seen reductions as high as 30%

Some little known facts:

The 2005 Western Canadian motorcycle championship was won using Somender’s multi groove cylinder head; the bike could not be beat leaving the starting line.

The driver winning the largest overall purse at No Problem Raceway in 2005 ran a set of heads grooved by me using Somender’s single groove layout.

 

[SATURN5]

Heh... I know Silverback...

I didn't see any documented difference other then the usual unquantifiable SOP...

 

[Lownslowlsc]

Hey Ed, just do it and let us know if you like it. I'd consider this a very good "bang for your buck" mod that will give you more then enough low end torque for your towing needs.

 

[Ed Hall]

Heh... I know Silverback...

I didn't see any documented difference other then the usual unquantifiable SOP...

Here's some drag strip results from head grooving.

http://forums.turbobricks.com/showthread.php?t=74370&page=3

Just a quick note from the drag strip. Most know I'm involved with numerous high compression SBC engines. The locals love what the grooves do to their race engines.

With the grooves Fabian has lowered the idle of his high compression N/A 383 from 1100 RPM to 500 RPM. The oil runs clean, burns less fuel and the engine is much more responsive. Every one wants to know, how much power did the grooves provide, I can honestly say I don't know. We combined several modifications for maximum preformance. His stock body 67 Camaro is running 10.10 ET in 90 degree weather, expecting 9.80s when the cool air arrives. That's near a half a second quicker than before the modifications, needless to say, Fabian loves his grooved 383.

 

[SATURN5]

Nice copy and paste from the thread...

Still. No before/after dyno sheets = unquantifiable SOP.