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

under drive pulleys gains

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Old May 6, 2004 | 10:28 AM
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Default under drive pulleys gains

i am planing on doing bolt ons on my stock 91 i was thinking about under drive pulleys are thay worth the money what are the hp gaines also whare to get get them at a good price thanks
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Old May 6, 2004 | 10:43 AM
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Default Re: under drive pulleys gains (redvette6spd)

You can expect 5-10chp gain.

Summit has the March Power & Amp series. I only installed the underdrive crank & over drive alt pulleys from the set. Though I got the steel set I'm thinking that the Al set might give a little better gains.

Have you done the "free" type mods yet?
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Old May 6, 2004 | 10:59 AM
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Default Re: under drive pulleys gains (65Z01)

car is going to shop this weekend has k&n and open air box doing tpis long tube headers gutting cats magna flow cat back air pump eleminator frizbe toss clean up pluntum tpis prom gas regulator
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Old May 6, 2004 | 11:31 AM
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Default Re: under drive pulleys gains (redvette6spd)

It should be like driving a different car with those mods.

Have you considered an AFPR to add more fuel at WOT by bumping fuel pressure? Those serious air flow mods may need a little more fuel.
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Old May 6, 2004 | 01:53 PM
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Default Re: under drive pulleys gains (65Z01)

what is a AFPR i thought a adjustable fule regulator takes care of fule preasure
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Old May 6, 2004 | 01:56 PM
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Default Re: under drive pulleys gains (redvette6spd)

bad speller fuel,fuel :_dupe:
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Old May 6, 2004 | 02:11 PM
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Default Re: under drive pulleys gains (redvette6spd)

AFPR=adjustable pressure regulator

most people show a .1 gain from the underdrive pulleys, so its about 10hp
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