Here I was all fired up and ready to order me a set of Canfield 195s yesterday for my L98. I'm looking to increase my compression a bit so I was thinking a combustion chamber of 58cc. The fella at Canfield advised me to do some research to be certain that I won't run into any clearance problems at 58cc. Is anyone running 58cc on a stock short block? If so...what brand of head.. P.S. I know TPIS sells AFRs in 58cc but I'm kind of curious if anyone out there is running a 58cc Canfield......Thanks

 

anyone????.....all help appreciated..

 

Jones'n dude,

My L-98 Corvette came from the factory with 58cc heads. The real question you should ask is how much lift and duration is your cam?

No prob with a stock cam. More than .470 lift or 224* duration, and you should check piston to valve clearance.

The easiest way to do it? Assemble the engine, put a .100" stack of feeler gauge between the rocker arm and the valve stem on #1, and SLOWLY rotate the motor by hand (using a 1/2" rachet and crank sprocket)through Top Dead Center.

If you feel the engine clunk to a stop around TDC - well, you have less than .100 clearance.

Hope this helps.

BOR

[This message has been edited by Box of Rocks (edited November 10, 2000).]

 

The feeler gauge idea sounds good and I even did that but, if you set the lash with the feeler gauges installed you accomplish nothing. I didn't realize that until after I fired my motor. What you need to do is set the lash and back the adjusting nut off until you can fit the gauges in then tighten down the appropriate number of turns. Oh yeah the lifter must be filled with oil. I think that using clay on the piston with a solid lifter(even if the cam is hydraulic) is by far the best way to go.

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82 z28 350cid, vortec heads, comp 262h cam, Holley 600cfm carb, 2in twice pipes, MSD ignition, turbo 350 trans, 3.73 posi, manly b&m megashifter