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

What to do first??

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Old Jul 30, 2004 | 08:32 PM
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Default What to do first??

I want to do a few subtle things to the 94 and wondered what are some minor mods that are worth while:

I have a K&N with the cut lid already (thats it)

1) TB Bypass? (possible on a 94?) worth doing?

2) Anyone try that airfoil in the throttle body sold at Mid America...supposed to stream the air in and give like 12HP...or is it a pipe dream... http://www.madvet.com/shop?frame=1.12.786

3) Replace the flex inlet tubing with non-ribbed tubing in larger diameter?

I am not trying to go nuts- just a few things to make it breath..

TIA

Last edited by byte_me; Jul 30, 2004 at 08:34 PM.
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Old Jul 30, 2004 | 08:33 PM
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TB bypass is ok, you wont notice much.

Airfoil is crap, and the 'power coupler' that replaces the accordian is for looks.
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Old Jul 30, 2004 | 08:49 PM
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When TPIS first came out with the TB airfoil, I think it was proven that it gave you 7-8 hp.

I had something similiar to the smooth air intake piece that SLP sells for ls1 fbodies, and it is a small gain, but both of these pieces will help a small amount.
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Old Jul 30, 2004 | 09:39 PM
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Originally Posted by vader86
TB bypass is ok, you wont notice much.

Airfoil is crap, and the 'power coupler' that replaces the accordian is for looks.
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Old Jul 30, 2004 | 11:00 PM
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Originally Posted by F1Fan
When TPIS first came out with the TB airfoil, I think it was proven that it gave you 7-8 hp.
Yeah......right.

They didnt tell you what the characteristics of the engine were either, because about 50 people here have bought it, dynoed, and found no gain.
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Old Jul 31, 2004 | 12:31 AM
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I can't believe there'd be no effect from the airfoil at all... I know that LS1's will benefit a small amount from smoothing the air flow out. I don't see why that same principle wouldn't apply to any LT1.
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Old Jul 31, 2004 | 12:33 AM
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Be my guest, buy one and dyno it.
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Old Jul 31, 2004 | 02:07 PM
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Originally Posted by vader86
Be my guest, buy one and dyno it.
The point here, for the new guy, is that people - MANY PEOPLE - *have* purchased one & dyno'd it with z.e.r.o. gains. Yes, it is intuitive to any automotive enthusiast that making the intake air charge as smooth as possible is beneficial and will yield horsepower gains. Keep in mind that the LS1 and LT1 are very different beasts - each responds in a completely unique way to serious intake upgrades (heads, cam, etc.). The LS1 responds VERY well...the LT1, not as much.

I love the Mid America catalogue - just got one yesterday, in fact, and I even found myself contemplating that smooth coupler just this morning (for looks, though, rather than performance). The thing you have to realize is this about the TB airfoil: Either it smooths out airflow, but the LT1 doesn't care because it's not that big of a difference, or it doesn't smooth out airflow at all and it's just a waste of money. Either way, save your hard-earned cash!

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