I just ordered this cam from Jegs and just found out today that Crane recommends using it with a compression ratio around 9.5:1...I have a 305 w/ Vortec heads, Vortec TBI manifold, and Corvette center dump manifolds. My compression ratio however is about 8.4:1-more than 1 point lower than recommended. How will this affect the cam? Will I simply see less power than with a higher ratio, or will the engine run like crap?

Thanks,

Matthew C. Hall

 

Less power is true. I would have the heads milled. You will be suprised with the gains.

Brian

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1989 Camaro RS

305 .030 over Hydro Pistons
Vortech heads milled to 58cc...Performer RPM intake....LT4 cam..Crane Gold rockers...FastChip custom chip...ALum. Driveshaft...3.73 gears with Posi...underdrive pullys...Rebuilt 700R4 with Vette Servo and B&M shift Kit...MSD ignition...A/C Delete No SMOG junk....1997 SS leather interior...B&M Shifter... Ultimate TBI mods...14X3 K&N open Element Non-Drop...Hooker headers....3" exhaust with Flowmaster Cross flow 16X8 Wheels from 97 RS Spohn LCA's Spohn Panhard Bar..LETS PLAY FORD!!

 

How much did it cost to get your heads milled, brian? and how rough is your idle w/ the LT4 cam?

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Flowmaster 80 series muffler
K&N Open Element cleaner
Ultimate TBI Mods
Subframe Connectors
GM Wonderbar
Mac Panhard Rod
lead pedal foot . See my project rocket turtle @
http://oursportscars.homestead.com/home.html

 

Matt, I also run the Corvette Stainless center dumps with Vortec heads. Seems to work quite well. I am on a XE250 Comp cam now with the LT4 Hot Cam to follow, hopefully, if I could just find the time.