Hey turbo experts. what tolerances would you recommend for valve adjusting on a turbo motor. 325i head. 10psi max, daily driver and not a race car. head is being refreshed (valves re-cut to specs, head surfacing etc,) i would like to learn and read about your theories. thanks in advance
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clearance is more a function of cam grind profile than hp level etc. some aftermarkets cams spec a tighter clearance thoughLast edited by digger; 03-30-2014, 08:47 PM.89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Im really not used to this motor. In blown v8s or even turbocharged motors, you leave a "looser" tolerance on lash, that way you compensate for added heat and hence expansion. Ive never done any bmw motor, so thats why im asking for other people's experience. So, how do turbo guys set their valves then? Thank you guys!
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Originally posted by digger View Postclearance is more a function of cam grind profile than hp level etc. some aftermarkets cams spec a tighter clearance though
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