LT4 Hot Cam
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Instructor
Joined: Dec 2009
Posts: 236
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From: Houston Texas
LT4 Hot Cam
Hi I have a 1989 corvette with a 350 TPI (L98) and I wanted to put a cam in it. My main question is that if I replace the valve spring with LT4 valve springs and stick an LT4 hot cam in it do I have to change any thing else (such as something vitale that the engine will not run properly without.) I know that 1.6 rockers would be nice but they are not manditory, right? I am thinking of things more alonge the lines of lifters, rods, etc.
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Pro
Joined: Jun 2005
Posts: 581
Likes: 60
From: USA
i'm running the LT4 HOT cam in my L98 with 1.5 RR, and it's fine. I am using aftermarket heads, but I think that may be beside the point.
I did change the pushrods since I went with guideplates and non-self-aligning rockers. another tangent.
to answer your question I think, no, the 1.6 RR are not mandatory.
I did change the pushrods since I went with guideplates and non-self-aligning rockers. another tangent.
to answer your question I think, no, the 1.6 RR are not mandatory.
Le Mans Master
Joined: Nov 2006
Posts: 5,032
Likes: 204
From: Greenwood Indiana
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With 1.5 rockers, the lift is .492. The cam will work, but I don't know if the LT4 springs will fit your heads. (diameter may be why) I'm sure there are after-market springs that will work.
A new computer-tune would kick it up a notch, too.
A new computer-tune would kick it up a notch, too.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Hi I have a 1989 corvette with a 350 TPI (L98) and I wanted to put a cam in it. My main question is that if I replace the valve spring with LT4 valve springs and stick an LT4 hot cam in it do I have to change any thing else (such as something vitale that the engine will not run properly without.) I know that 1.6 rockers would be nice but they are not manditory, right? I am thinking of things more alonge the lines of lifters, rods, etc.
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==>==>==>Recommended: Best to go with non-self aligning rockers with guide plates and hardened pushrods.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Gradustion Dasy Parade 20 May 2010!!!
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
It is similar to the ZZ4 with 1.5 rockers and also have the ZZ4 hot
cam springs good to .525.
I am using scorpion 1.5 rockers. I went with non-self aligning
hardened push rods and guides because it was a lot cheaper
and seamed to be a better setup to me.
I can round up some part #s if you are interested.
Last edited by ch@0s; Dec 26, 2009 at 01:32 PM.
