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

TB hp/tq results?

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Old Sep 19, 2002 | 02:02 AM
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Default TB hp/tq results?

Has anyone ever actually dyno'd the difference made with throttle body changes(going from 48 to 52 or 52 to 58 or 48 to 58 etc.) and not changing anything else? If so, what were the results? TIA. :cheers:
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Old Sep 19, 2002 | 09:23 AM
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Default Re: TB hp/tq results? (sinistervette)

One guy with an LT4 changed his and gained a little. Most everyone else lost throttle response, I think Nathan showed no gain at all. And some people lost a couple hp.

a bigger TB isnt necessary until you go with bigger cubes


[Modified by vader86, 8:24 AM 9/19/2002]
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Old Sep 19, 2002 | 10:18 AM
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Default Re: TB hp/tq results? (sinistervette)

:seeya

I went from the stock 48 to a 52 mm. The car had a cam and headers, it made 336 horsepower one dynojoet. I put the 52mm on there and made 332 horsepower on another dynojet. You could say it hurt performance, but I don't think so. You can see as much as a 4 hp variation between runs on the same dyno, so different dyno's I can't consider 4 hp to be anything significant.

I honestly don't believe it hurt me at all. I also don't believe it helped me at all. I've got the dyno graphs if you would like to take a look.
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Old Sep 19, 2002 | 11:04 AM
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Default Re: TB hp/tq results? (sinistervette)

I would think the gains of a mod like this would be difficult to measure on a dyno because the car is stationary. Just a guess :confused:
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Old Sep 19, 2002 | 11:07 AM
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Default Re: TB hp/tq results? (TA)

I would think the gains of a mod like this would be difficult to measure on a dyno because the car is stationary. Just a guess :confused:
Just curious how would that matter? Unless you have a ram air mod the engine is going to suck in air, not have it forced down it's throat.
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Old Sep 19, 2002 | 11:10 AM
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Default

Unless you have gone big cubes I wouldn't bother.
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