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Join Date: Jul 2005
Location: Cleveland, OH
Posts: 1,367
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What's acceptable piston to valve clearance?
race motor 3.8 with rsr cams, mahle rsr pistons, carillo rods, ebs race springs set at 88lbs seat pressure, red line 7.5k.
I've seen 1mm is fine, but have seen higher numbers too, up to 1.8mm. thoughts? |
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02-22-2019, 01:43 PM
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Join Date: Oct 2003
Location: Central Fla
Posts: 1,864
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V to P
Minimum of 1mm on intake at the closest point and 2mm on the exhaust side closest point will be providing springs are adequate, I have seen closer than that without contact but that’s my minimum
Mike Bruns
__________________
The two most useless things to a driver are the braking distance behind you and nine-tenths of a second ago. |
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02-22-2019, 03:20 PM
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Thanks mike... ebs springs were the highest spring rate I could fine at 375 lbs/in.
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02-22-2019, 03:23 PM
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...guess i'm good. came up with 2.5mm intake and 2.7mm on exhaust. basically got to minimum 10 degrees before tdc overlap on exh and 10 degrees after on intake.
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02-25-2019, 08:29 AM
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Location: Central Fla
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That’s perfect
__________________
The two most useless things to a driver are the braking distance behind you and nine-tenths of a second ago. |
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02-25-2019, 08:48 AM
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