Need help! Upgraded cam and bored engine block. Do i need special heads?

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Apr 12, 2014 | 10:07 AM

#21

redneck_ram

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From: Rochester, NH

Quote:

Originally Posted by HeyYou

Intake lift is .480, Exhaust lift is .512.... which is beyond the limits of the stock valve springs. Don't know if you will have piston to valve interference with that lift. (not that familiar with the 318) That is why I suggest having the machine shop check clearance.

max is .480 on the 318, which is why i went with the 360...

Apr 12, 2014 | 11:04 AM

#22

HeyYou

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From: Clayton MI

Quote:

Originally Posted by redneck_ram

max is .480 on the 318, which is why i went with the 360...

Where are you getting that from? I can't find anything on that. However, I did find an article here. They are using a .550 lift cam, with stock pistons, and didn't even need to cut the pistons for valve clearance.

Apr 12, 2014 | 11:36 AM

#23

merc225hp

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From: N/A

,480 is the max for the valve springs you guys know that. Valve clearance issue does not start until you get over .580 or more.

Apr 12, 2014 | 12:23 PM

#24

Ham Bone

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From: Blacksburg, VA

360 has a longer stroke then the 318 so one would thinkvalve clearance issues would happen with the 360 before the 318.

http://dodgeram.org/tech/gas/specs/5_2v8.htm

http://dodgeram.org/tech/gas/specs/5_9v8.htm

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