best modifications for throttle response?
Former Vendor
Joined: Nov 2005
Posts: 11,792
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From: Ossining New York
St. Jude Donor '07-'08-'09-'10-'12-'13-'14
Uh...Um.....Well...... It's VERY SIMPLE.....
Uh...Um.....Well...... It's VERY SIMPLE.....
CoW BOOSTER!
Proven over and over again to be
THE BEST C6 MOD EVER CREATED!
Only $199 @ Corvettes of Westchester!
Stay TUNED!
Chuck CoW
Proven over and over again to be
THE BEST C6 MOD EVER CREATED!
Only $199 @ Corvettes of Westchester!
Stay TUNED!
Chuck CoW
Instructor
Joined: Oct 2011
Posts: 131
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From: Bourbonnais IL
NOPE,, coils will give you NOTHING over what the OEM coils provide, There NOT a weak link in the C5. Neither are wires or plugs. NO performance to be had there!
What you need is TUNING. Specifically, the throttle response tables. Not everyone has the correct knowlwdge to alter them correctly. If you do it wrong you destroy the PCM and TAC modules! $$$$$$$$$$$$
lionelhutz Hit the nail on the head. There are changes that can be done to the throttle files. Give Chuck at Corvette Of Westchester a call. If theres anyone who knows the in and outs of GM PCM throttle files, its HIM.
I'm positive he can mail order tune your PCM to get you what you desire!
Talk to him and see if he can provide you what you desire.
BC
What you need is TUNING. Specifically, the throttle response tables. Not everyone has the correct knowlwdge to alter them correctly. If you do it wrong you destroy the PCM and TAC modules! $$$$$$$$$$$$
lionelhutz Hit the nail on the head. There are changes that can be done to the throttle files. Give Chuck at Corvette Of Westchester a call. If theres anyone who knows the in and outs of GM PCM throttle files, its HIM.
I'm positive he can mail order tune your PCM to get you what you desire!
Talk to him and see if he can provide you what you desire. BC
Safety Car
Joined: Jan 2012
Posts: 3,956
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From: Da U.P.
I dont see why you cant have an engine that will rev really quick and yet still have a good low end. It seems like to me that you would want your engine to do that especially for road racing and for rev matching, plus the less rotating mass there is the faster your car will accelerate...
Safety Car
Joined: Jul 2005
Posts: 3,572
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From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
I have had my throttle speed set faster before and didn't like it at all. Taking off from a stop light sucks with a manual and if you track the car you lose almost all control over wheel spin. If you just drag race it's fine but that's it 
if you have HPTuners you can see the table that affects the throttle speed at: engine>airflow>electronic throttle>desired throttle area tables
there are two tables there, one when in normal mode and one when you go into competitive mode.
I found just getting the car tuned properly will give you enough without messing with the throttle speed. just my .02
if you have HPTuners you can see the table that affects the throttle speed at: engine>airflow>electronic throttle>desired throttle area tables
there are two tables there, one when in normal mode and one when you go into competitive mode.
I found just getting the car tuned properly will give you enough without messing with the throttle speed. just my .02
Safety Car
Joined: Jul 2005
Posts: 3,572
Likes: 9
From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
Bingo! Just because it revs quicks doesn't mean it's going to rev higher and produce less torque. I'm curious as to what exactly this COW booster actually is? I thought only a tuned could alter the electronic throttle's response. I'd love to get an optimized table from someone for EFILive because the way it's in there is pretty much Greek to me. That and a LW flywheel will make the response nice and snappy, I've been happy with all the LW flywheels I've installed. I even put one in my Crown Victoria, but that car's such an overgeared boat that it does make it a bit of a challenge sometimes. I've driven other cars that, once you got used to the flywheel and grabby clutch, could be driven as easily and smoothly as stock.
Here is a screen shot of the table
Last edited by printmanjackson; Mar 21, 2012 at 12:25 AM.
Team Owner
Joined: May 2001
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
I have had my throttle speed set faster before and didn't like it at all. Taking off from a stop light sucks with a manual and if you track the car you lose almost all control over wheel spin. If you just drag race it's fine but that's it
if you have HPTuners you can see the table that affects the throttle speed at: engine>airflow>electronic throttle>desired throttle area tables
there are two tables there, one when in normal mode and one when you go into competitive mode.
I found just getting the car tuned properly will give you enough without messing with the throttle speed. just my .02
if you have HPTuners you can see the table that affects the throttle speed at: engine>airflow>electronic throttle>desired throttle area tables
there are two tables there, one when in normal mode and one when you go into competitive mode.
I found just getting the car tuned properly will give you enough without messing with the throttle speed. just my .02
Safety Car
Joined: Jan 2012
Posts: 3,956
Likes: 520
From: Da U.P.
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Former Vendor
Joined: Nov 2005
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From: Ossining New York
St. Jude Donor '07-'08-'09-'10-'12-'13-'14
I'm the guy that started that whole thing....
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
FYI, those curves of cable throttle are misleading. You might look at that and say to yourself that you'd want the programmed curve to match that cable throttle curve. Cable throttles also have a nonlinear progressive throttle action which opens the throttle slowly at low pedal and faster at high pedal, very similar to the stock C5 throttle curve. A linear throttle movement doesn't translate to a linear throttle area. Rather, it means the throttle area increases quickly at low pedal and slowly at high pedal. A linear throttle movement will make the car seem more responsive by sacrificing the control of power you have at low speeds.
Take a look at the graph scales. The stock curves are "concave", the CoW curve is linear and the cable throttle curve is "convex" and the opposite of a stock cable throttle curve.
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
It's just adjusting 2 curves in the PCM. Any tuner can adjust them for you. I'm sure ECS would adjust it for you in their mail order tune.
http://forums.corvetteforum.com/c5-s...nly-149-a.html
Peter
http://forums.corvetteforum.com/c5-s...nly-149-a.html
Peter
Instructor
Joined: May 2007
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I built my car to have the best low end throttle response possible that is legal for my class ( no displacement increase, no internal engine mods). I run almost always in 2nd gear as low as 2,000 rpm.
I will list in order of performance gain what worked best.
Dyno tune, specifying to start tuning at 2,000 rpm, most tuners don't start that low.
Aluminum flywheel and clutch.
Long tube headers.
polished throttle body
Lighter 25% under drive pulley
cold air intake (vararam).
I will list in order of performance gain what worked best.
Dyno tune, specifying to start tuning at 2,000 rpm, most tuners don't start that low.
Aluminum flywheel and clutch.
Long tube headers.
polished throttle body
Lighter 25% under drive pulley
cold air intake (vararam).
Drifting
Joined: Apr 2008
Posts: 1,335
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From: Qualicum Beach British Columbia
Race Director
Joined: Apr 2005
Posts: 11,138
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Shorter stroke = faster rev. My buddy built his own custom engine for auto-x. Big bore + short stroke + all forged internals. Putting out 550 at the flywheel, Revs to 8,000 rpms as fast as you can snap your fingers.
Thread Starter
Supporting Vendor
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From: Republic of Texas
Safety Car
Joined: Jan 2012
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From: Da U.P.
If ya really wanna get out in the weeds, start adding cylinders, reducing displacement, reciprocating mass, and rev it to the moon like an indy car with diesel-like compression ratios. Or you could build a 4 rotor and port it to hell and back.
Melting Slicks
Joined: Jan 2004
Posts: 3,012
Likes: 15
From: Jensen Beach FL
Depends on your definition of throttle response. With gears you get better throttle response but not in the sense of engine throttle response. Who care what happens with the clutch in and reving the engine. If you have more off the line power, to me, that is throttle response. To others it's more hp/torque. Depends on which way you want to go.
Last edited by craig04c5; Mar 21, 2012 at 11:57 AM.
Race Director
Joined: Apr 2005
Posts: 11,138
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Bore: 4.125"
Stroke: 3.5"
Displacement: 374 CI
Compression: 10.5:1
Cam: Solid Roller, .6" lift, 240 duration at .050"
Heads: AFR 195cc, competition ported
Intake: Edelbrock Super Vic
HP: 540ish on dyno, no accessories, no mufflers, 425 RWHP in car, 2.5" exhaust
Rev Limiter: 7800 RPM (starts around 7500)
