Using Crane 2030 Compucam w/ less than 9.5:1 compression

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06-07-2001, 09:21 AM

MatthewH

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Using Crane 2030 Compucam w/ less than 9.5:1 compression

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

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06-07-2001, 12:53 PM

Brian Felts

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Car: 89 RS 355/ 89 IROC Convert

Engine: Hot Cam 355/TPI 305

Transmission: All 700r4's

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!!

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06-07-2001, 02:22 PM

91Firecrow305TBI

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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
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http://oursportscars.homestead.com/home.html

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06-08-2001, 08:18 AM

FastBroker

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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.