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

L98 Air Filter Question

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Old Nov 24, 2004 | 12:02 PM
  #1  
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Default L98 Air Filter Question

On my 91 Firebird, I had an SLP Cold Air Induction package on it. I found that by removing the thing and having it suck air directly out of the mouth of the TB, I gained 20 HP. I was thinking of having a K&N RC-5000 filter on the mouth of the TB in my vette. However, I know I would be sucking in hot engine air which hurts the power.

In my case now, I think I might be able to get away with it since I am installing a Greenwood hoodscoop with the mouth open. It will look like:

Pic 1
Pic 2
Pic 3

Since the hood scoop will be letting in fresh cool air, would I be fine to just remove the air filter and stuff and stick the cone filter on the end of the TB or not? TIA
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Old Nov 24, 2004 | 12:22 PM
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The stock set up will take in more air, that is why they have not built the similar aftermarket intake that the C5s have for the C4. Unless you build a true Ram Air setup you will be wasting your money.

Last edited by vettefast; Nov 24, 2004 at 12:26 PM.
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Old Nov 24, 2004 | 12:25 PM
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seeing your pic1 and 2 I was afraid you was thinking to go with the Hole in the hood!
Then I see the pic3..
I think that with the colder air you can use the cone filter directly in the TB. But I don't think you will see an increment on HP..
-Beppe-

Last edited by conv90; Nov 24, 2004 at 12:29 PM.
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Old Nov 24, 2004 | 12:49 PM
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If that hood scoop is functional fab up a filter holder that fits under the scoop.
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Old Nov 24, 2004 | 03:05 PM
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The scoop is necessary simply to clear the Holley Stealthram. I was debating between getting a K&N that fits the stock filter housing or getting a cone filter to replace everything.
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