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PV clearance a prob with a 236/236 cam ?

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Old 08-19-2003, 08:17 AM
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Default PV clearance a prob with a 236/236 cam ?

on heads that are just milled of for straightness ?
Old 08-19-2003, 08:44 AM
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Default Re: PV clearance a prob with a 236/236 cam ?

Depends on the LSA and ICL of the cam, but I'm willing to bet you'll have problems. If you decided to try that cam, MAKE SURE you check PTV clearances.
Old 08-19-2003, 02:47 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

the lsa would be a 112. what icl would i have to get it on to not have PV probs?
Old 08-19-2003, 08:16 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

I finished my Heads/Cam swap last month, and let me tell you this: .30 cut off my 5.7 stageII heads, with my new cam (228/236.571.602) As I rotated the motor over to check P/V clearance, the exhaust valve smashed on the piston (DAMN) Sent those heads back to RMS, and we worked out a deal on 5.3 milled ONLY for straigtness (.0005) Again, installed those heads, rotated the motor over again to check P/V clearance, and sure enough, I had just enough clearance. Hope this helps you.
Old 08-19-2003, 08:22 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

Why do I keep hearing people talk about limited P to V clearance due big duration numbers? It's LIFT that causes clearance problems. You could run a 250/250 duration cam with .540 lift and never have a problem with P to V clearance...
Old 08-19-2003, 08:56 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

Its gonna be close...What happened with "I can make power with a small cam" I guess you are ready to step it up with the big boys?
Old 08-19-2003, 11:08 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

well i want to keep the lift under .590 so would that keep me in the safe zone?
Old 08-19-2003, 11:10 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

Why do I keep hearing people talk about limited P to V clearance due big duration numbers? It's LIFT that causes clearance problems. You could run a 250/250 duration cam with .540 lift and never have a problem with P to V clearance...
It's actually duration, not lift.
Old 08-19-2003, 11:13 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

well if you can run the ASA cam with the stock heads..then the 236 duration should be ok, right? since its a 226/236 ?
Old 08-19-2003, 11:52 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

On the exhaust side, yes due to the smaller exhaust valve.
Old 08-20-2003, 02:43 AM
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Default Re: PV clearance a prob with a 236/236 cam ?

Why do I keep hearing people talk about limited P to V clearance due big duration numbers? It's LIFT that causes clearance problems. You could run a 250/250 duration cam with .540 lift and never have a problem with P to V clearance...
It's actually duration, not lift.
Yea... what he said!

It's not just the lift, but where and when ya put it that's important.
Old 08-20-2003, 09:37 AM
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Default Re: PV clearance a prob with a 236/236 cam ?

TTT...
Old 08-20-2003, 06:25 PM
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Default Re: PV clearance a prob with a 236/236 cam ?

Why do I keep hearing people talk about limited P to V clearance due big duration numbers? It's LIFT that causes clearance problems. You could run a 250/250 duration cam with .540 lift and never have a problem with P to V clearance...
It's actually duration, not lift.

Mine's a perfect example of above. Cam- 239/251, .570"lift, 106 lsa. Installed straight up. Heads milled .055". Had to notch pistons .080" and .100"
int/exh for clearance.FWIW
joel



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