Larger cam (or not)

Mike Hathaway · February 14th, 2005, 03:04 AM

I have a 93 GMC Safari that is powered by a OLDS 350/4L60E and the ECM/TBI of a 94 chevy truck. I was given an Isky .512 lift cam,never used,and wondered what would be needed changed to run this cam. The engine is now 9.5:1 and .448/.472 and I know this is radical,let me know if I can make the switch or should we run this cam in the cutty with a carb instead=.472/.496 & 8.5:1 now . [img]redface.gif[/img]

Oldsguy · February 14th, 2005, 12:21 PM

Mike, that lift sounds pretty steep, you may find you wont have enough vacuum to operate your brakes safely if the duration is also big. Is that cam a torque cam? you might check the specs on that cam out before using it in the GMC. It might be a better cam for the Cutlass if you plan on using the car as a "toy". Also, check with the people over ar ROP. They are quite knowledgeable and will be more than willing to help. Good luck.

Mike Hathaway · March 23rd, 2005, 09:12 PM

Thanks for the help,but I chickened out and sold the cam for $60,fear of problems overran my courage to try,thanks again Mike

February 14th, 2005, 12:21 PM	#2 (permalink)
Oldsguy Hot Rodder at heart Administrator Join Date: May 2004 Location: Lees Summit MO Posts: 5,315	Mike, that lift sounds pretty steep, you may find you wont have enough vacuum to operate your brakes safely if the duration is also big. Is that cam a torque cam? you might check the specs on that cam out before using it in the GMC. It might be a better cam for the Cutlass if you plan on using the car as a "toy". Also, check with the people over ar ROP. They are quite knowledgeable and will be more than willing to help. Good luck. __________________ Dan '77 Cutlass Supreme '46 2 door "The rocket 455.....it's a sledgehammer approach to a thumbtack world" LuxBlue of HAMB.

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February 14th, 2005, 03:04 AM	#1 (permalink)
Mike Hathaway Junior Member Join Date: Aug 2003 Location: Augusta,WI Posts: 3	I have a 93 GMC Safari that is powered by a OLDS 350/4L60E and the ECM/TBI of a 94 chevy truck. I was given an Isky .512 lift cam,never used,and wondered what would be needed changed to run this cam. The engine is now 9.5:1 and .448/.472 and I know this is radical,let me know if I can make the switch or should we run this cam in the cutty with a carb instead=.472/.496 & 8.5:1 now . [img]redface.gif[/img]

March 23rd, 2005, 09:12 PM	#3 (permalink)
Mike Hathaway Junior Member Join Date: Aug 2003 Location: Augusta,WI Posts: 3	Thanks for the help,but I chickened out and sold the cam for $60,fear of problems overran my courage to try,thanks again Mike