Fast_vette89

I am wondering if anyone knows the specs for the L98 cams. Alm heads, roller. B/c i'd like to see the specs before i buy a new cam.
-jason

flyersfan1088

Use the search function. If I remember right it's something like 207/213 duration 420/430 lift

Raistlin

This is from the GM performance parts catalog

14093643 Hydraulic Roller Tappet
This hydraulic roller tappet is used on the 87 350ci Corvette and IROC-Z Camaro. The duration at lash point in degrees (intake/exhaust) is 294/294; duration at .050" tappet lift (intake/exhaust) is 202/206; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 403/415. Valve lash is zero/zero and lobe centerline is 115 degrees.

flyersfan1088

Interesting. I always thought those were the numbers for the flat tappet cam. Guess you learn something everyday. :D

Fast_vette89

thanks guys. I've done some searching, but wanted to make sure what i came up with makes sense.

Davemc1963-87conv

From what I remember, the gross numbers were the same when they introduced the roller cam, most of the gains were made in the reduction of friction, However that said, the roller cam profile looked completely different from the flat tappet cam, with the ususal more rounded "roller" cam lobe profile being quite obvious. Its funny that the HP gains were so small. :(


[Modified by Davemc1963-87conv, 10:35 AM 4/28/2003]