C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

lost torque

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Old Mar 22, 2004 | 04:02 PM
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From: Brandon FL
Default lost torque

I put stinger mufflers on my 88 L98 and lost torque. Any suggestions on a fairly inexpensive way to get it back?
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Old Mar 22, 2004 | 04:08 PM
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Default Re: lost torque (88scryer88)

I got a way thats free, but you're not gonna like it...........put the stock system back on :crazy:

Seriously though, I can't see why you would have lost that much torque. Maybe a tad because of the free-flow mufflers, but it shouldn't amount to much. Have you had it to a dyno or to the track for before and after results? Maybe the loss is in your head.
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Old Mar 22, 2004 | 04:10 PM
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From: Brandon FL
Default Re: lost torque (TA)

It may be in my head but it feels like a lag when I punch it while moving. I just got it in November and never really noticed it before.
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Old Mar 22, 2004 | 04:11 PM
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Default Re: lost torque (TA)

I'll bet the loss is in your head. I did before and after dyno results on my 90 vette. I went from stock exhaust to headers, no cats, muffler elims and true 2.5" duals and GAINED torque at every rpm.
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Old Mar 22, 2004 | 06:03 PM
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Default Re: lost torque (88scryer88)

The only way to know if you gained or lost torque is on a dyno or drag strip. Of course if the mufflers are not hi-flow you could have lost torque due to back-pressure increase. Try removing the mufflers (open pipes for test purpose) to see if response is better.

Install an AFPR and bump fuel pressure a little.

Also check base timing; 6deg BTDC is stock and you might try 8deg BTDC.

Also check TPS base idle setting; stock is .54 Vdc and you might try .65Vdc for a little better throttle response.
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Old Mar 22, 2004 | 07:05 PM
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Default Re: lost torque (65Z01)

The only way to know if you gained or lost torque is on a dyno or drag strip. Of course if the mufflers are not hi-flow you could have lost torque due to back-pressure increase. Try removing the mufflers (open pipes for test purpose) to see if response is better.

Install an AFPR and bump fuel pressure a little.

Also check base timing; 6deg BTDC is stock and you might try 8deg BTDC.

Also check TPS base idle setting; stock is .54 Vdc and you might try .65Vdc for a little better throttle response.
:iagree: try 8 deg BTDC :D
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Old Mar 23, 2004 | 08:58 AM
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From: Brandon FL
Default Re: lost torque (65Z01)

I put a hypertech chip in. I thought I may have read somewhere that if you have a chip not to advance your timing. Is this right or am I imagining things.
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Old Mar 23, 2004 | 09:41 AM
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Default Re: lost torque (88scryer88)

You could probably gain your performance back if you ditch the chip. Hypertech is notorious for giving up HP.
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Old Mar 23, 2004 | 09:49 AM
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From: Brandon FL
Default Re: lost torque (Nathan Plemons)

If that is the case what is gained by the chip. Just better gas mileage? I know you cant believe claims from manufacturers but they claim a horsepower increase.
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Old Mar 23, 2004 | 10:03 AM
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Default Re: lost torque (88scryer88)

If that is the case what is gained by the chip. Just better gas mileage? I know you cant believe claims from manufacturers but they claim a horsepower increase.

Sell your chip on ebay. Mod the car as you like it then get a real chip tuned specificlly for your car and mods here off the forum. Ski_Dwn_It did a fine job with the chip for my car and unlike the Hypertech, I had a very very long time ago, his chip actually increased the power.
:flag
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Old Mar 23, 2004 | 10:38 AM
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From: Brandon FL
Default Re: lost torque (VictorRussell'92)

Thanks...I'm pulling the chip tonight.
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