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06-02-2020
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#1 |
 
Join Date: Jul 2012
Location: Allentown, PA
Posts: 309
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Valve to Piston Clearance
Has anybody had issues with valves kissing piston tops (high lift cams)? What were the valve to piston clearances? RPM's? Minimum recommended clearances (intake and exhaust)?
Sent from my SM-G975U1 using ZR-1 Net Registry mobile app
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'95 ZR-1, aqua/gray, #167 368 LPE/Haibeck, Web cams, Stainless Works headers, B&B Fusion exhaust, 18" Fikse wheels, Alcon brakes, lowered. 491 SAE RWHP. |
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06-05-2020
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#2 |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 780
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Re: Valve to Piston Clearance
Yes. But was an over rev situation. I design around .060 intake, .100 exhaust. If the driver is sketchy, now I?ll increase that. [emoji5]
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Todd ____________________________________ *** our email address has changed! info@pepmeierengines.com pepmeierengines.com Friend us on Facebook too: www.facebook.com/profile.php?id=100011443683384 Pepmeier Engine Development |
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06-05-2020
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#3 |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 780
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Re: Valve to Piston Clearance
Should have clarified that the whole system must be accounted for.... cam accel/decel rates must be matched to the spring force, with at least 20% margin of safety.
Sent from my iPhone using ZR-1 Net Registry
__________________
Todd ____________________________________ *** our email address has changed! info@pepmeierengines.com pepmeierengines.com Friend us on Facebook too: www.facebook.com/profile.php?id=100011443683384 Pepmeier Engine Development |
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06-05-2020
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#4 | |
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Join Date: Jul 2012
Location: Allentown, PA
Posts: 309
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Re: Valve to Piston Clearance
Quote:
Sent from my SM-G975U1 using ZR-1 Net Registry mobile app
__________________
'95 ZR-1, aqua/gray, #167 368 LPE/Haibeck, Web cams, Stainless Works headers, B&B Fusion exhaust, 18" Fikse wheels, Alcon brakes, lowered. 491 SAE RWHP. |
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