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

Question on changing the cam.

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Old Dec 9, 2001 | 03:44 PM
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Default Question on changing the cam.

I bought this Comp Cam. The power band is from 1200 to 5200rpm would that work very well in a stock 91 L98 motor?
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Old Dec 9, 2001 | 04:01 PM
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Default Re: Question on changing the cam. (DarkRose94)

What are the specs for it.
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Old Dec 10, 2001 | 11:40 AM
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Default Re: Question on changing the cam. (scorp508)

Specs are Duration @ .050 212 intake and Exhaust 218, Gross Lift intake: .487 and Exhaust .495
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Old Dec 10, 2001 | 11:44 AM
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Default Re: Question on changing the cam. (DarkRose94)

Sure! ??? I actually have no idea. It might do alright because the power band isn't that high, it might work out better on a stock motor. If you are planning on doing head and intake work, you might could find a more aggressive cam.
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Old Dec 10, 2001 | 12:26 PM
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Default Re: Question on changing the cam. (DarkRose94)

Sounds like a good choice... just be sure the springs can handle the lift.
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Old Dec 11, 2001 | 01:55 PM
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Default Re: Question on changing the cam. (Glock'94)

I think also that it will do just fine on a stock motor. A little better than a stock cam. But a stock motor will not flow over 4800rpm right?
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Old Dec 11, 2001 | 02:00 PM
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Default Re: Question on changing the cam. (DarkRose94)

Smaller is better than to large. :yesnod:
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Old Dec 11, 2001 | 02:20 PM
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Default Re: Question on changing the cam. (DarkRose94)

With the 19.5" of runner length of the TPI system, you need to keep the duration around where you have it. This cam will work very well in your situation.
Good Luck,
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Old Dec 11, 2001 | 03:12 PM
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Default Re: Question on changing the cam. (DarkRose94)

These specs are about half way between the stock and Hot Cam.

Its also critical to look at the lobe angle separation. This dictates the amount of valve overlap which effects idle vacuum. For a stock computer LT1, its best to keep it between 112 and 115 degrees to keep the vacuum high enough and a good idle qualities. If the cam LSA specs are 110 degrees or less, you may wish to reconsider your selection.
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Old Dec 11, 2001 | 08:12 PM
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Default Re: Question on changing the cam. (DarkRose94)

Specs are Duration @ .050 212 intake and Exhaust 218, Gross Lift intake: .487 and Exhaust .495
I have a CC 268H single pattern (218@.050, .454, 110lsa) in the motor that's in my 85 right now. It won't go out and blow away a new LS-1, but it pulls better than the original bumpstick that was in it. If I remember right, it has about 14ins of vac. at 800rpm due to the 110lsa, and it does have a little bit of rough idle, but not much. I was hoping it would be a little tougher sounding at idle........ I'd say your cam should make an improvement over stock, but when I rebuild my original block, I'm going with a hotter cam. DesktopDyno2000 software shows mine at 312hp.
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