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| | Forums66 Topics128,051 Posts1,055,764 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | Joined: Mar 2026 Posts: 70 'Bolter | | 'Bolter Joined: Mar 2026 Posts: 70 | What is the best practice for setting the valve clearance? The shop manual says .012” intake and .020” for the exhaust.
Over the years users have often found that variations to the original specs work better. | | | | | Joined: Mar 2013 Posts: 219 'Bolter | | 'Bolter Joined: Mar 2013 Posts: 219 | INTERRESTING i'm just now assembling a 270 and was wondering what would be a good place to set them at cold for a first start up? i have a RV grind cam that i don't know the specs to and also going to run a turbo. i do know its touchy my other 270 with the roots blower and blower cam. i got the lash a little to tight, it still had lash but wouldn't run. loosened them up and it runs like a freight train. | | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | Degree the cam. The height of the clearance ramp will be very obvious- - - - -it's an area of gradual lift just as the lobe shape transitions from the base circle to the beginning of the lobe lift. Exhaust clearance ramps are usually higher than intakes, due to the heat expansion of the exhaust valve stem. Just about all the cam grinding companies publish detailed instructions on cam degreeing on their websites or paper catalogs. I learned how to degree cams by reading the 1954 edition of Ed Iskenderian's "Top Tuner'' Tips".
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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