PTV clearance issues LS2, MS3 cam
PTV clearance issues LS2, MS3 cam I'll try and not be long winded to avoid clouding things up. I was sold the ms3 cam by the vendor along with ported heads from the same vendor, at the time I was told ptv clearance wouldn't be an issue but would be "about as tight as you'd want to go". I was looking for bolt on power to a stock LS2 shortblock, figured I was good to go. Now a year later I'm having an actuall engne builder go thru all my stuff and make sure everything is good and generally just checked out for the year. He calls me and says the ptv clearance should be a minimum of .080 and .100 respectively, yet I have .060 and .065. Assuming the vendor isn't going to do anything for me a year or more out, what are my options to get things more inline? Can I just take the compression hit and stick a thicker head gasket in there? Is there something I can change enough in the stock valve train to get a little room? Or is fly cutting the piston the only option? Sadly I ordered a cam under the instruction of as big as possible without cutting the piston, and although I didn't "need" I'm now a bit worried about just sticking it all back together and saying "f it".
Any help/ideas appreciated!
Any help/ideas appreciated!
Registered User
Joined: Mar 2012
Posts: 19
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Imo you have a few options:
Slightly thicker cometic gasket
Flycut
Swap the cam
Leave as is
I'm assuming he has your heads off or easily removable for checking ptv and if you don't mind losing a little cr the gasket change is probably your best option. I know some people have run even less clearance then that, though it's one unlucky valve float from a kiss of death.
Slightly thicker cometic gasket
Flycut
Swap the cam
Leave as is
I'm assuming he has your heads off or easily removable for checking ptv and if you don't mind losing a little cr the gasket change is probably your best option. I know some people have run even less clearance then that, though it's one unlucky valve float from a kiss of death.
I decided to go with a PatG cam, I figured I'm 99% drag race anyway so there's probly power left on the table by using an off the shelf cam. I'm too much of a worrier to just run it and hope for the best, everytime I made a nitrous hit i'd be nervous and distracted over something relatively cheap to fix. Thank you all for the input!
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I'll try and not be long winded to avoid clouding things up. I was sold the ms3 cam by the vendor along with ported heads from the same vendor, at the time I was told ptv clearance wouldn't be an issue but would be "about as tight as you'd want to go". I was looking for bolt on power to a stock LS2 shortblock, figured I was good to go. Now a year later I'm having an actuall engne builder go thru all my stuff and make sure everything is good and generally just checked out for the year. He calls me and says the ptv clearance should be a minimum of .080 and .100 respectively, yet I have .060 and .065. Assuming the vendor isn't going to do anything for me a year or more out, what are my options to get things more inline? Can I just take the compression hit and stick a thicker head gasket in there? Is there something I can change enough in the stock valve train to get a little room? Or is fly cutting the piston the only option? Sadly I ordered a cam under the instruction of as big as possible without cutting the piston, and although I didn't "need" I'm now a bit worried about just sticking it all back together and saying "f it".
Any help/ideas appreciated!
Any help/ideas appreciated!
