comp cams xfi 268 and 113 heads
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Car: 1987 GTA
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comp cams xfi 268 and 113 heads
I'm in process of building 350 and need help with the heads. I have already purchased a used set of 113 heads and comp cams hyd roller 268 xfi cam. I need help determining what valve springs to run. Can I use the comp cams 918 beehive springs without machine work to the heads? If not what needs to be done? Is there a better/cheaper way to handle lift of this cam? Trying to do this on a budget with least amount of work possible. BTW I plan on running stock rocker arms with 1.5 ratio instead of the 1.6 the cam is rated at.
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
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Re: comp cams xfi 268 and 113 heads
I think maximum lift on 113's without machining is .525
The XFI with 1.5 rockers is more than that.
The XFI with 1.5 rockers is more than that.
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Re: comp cams xfi 268 and 113 heads
Yea I just checked and there is a good chance it will hit the guides.
Besides that is a lot of lift for those heads
Besides that is a lot of lift for those heads
Last edited by JaBoT; Jul 8, 2013 at 10:52 AM.
Thread Starter
Junior Member
Joined: Jun 2013
Posts: 18
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From: CA
Car: 1987 GTA
Engine: NONE
Transmission: T5-WORLD CLASS
Axle/Gears: 9 BOLT- 3.45
Re: comp cams xfi 268 and 113 heads
Ya I believe I need to clearance the valve guides but not machine the valve spring pockets.......is that correct?
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