Do you think I'll have PTV issues?
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From: Farmingville, New York
Do you think I'll have PTV issues? I just ordered a set of Patriot LS6 style heads, 035 castings (not 243's) w/ 64cc chambers and 2.02/1.57 valves along with their new 225/229 .580/.590 114 cam. In addition, I've got 1.75 ratio rockers on there which will bring the lift #'s to .597/.607. I didn't think to ask while I had them on the phone, but do you think I'll have PTV issues? I'll probably check anyway, but I'm just curious if I should start to prepare myself for some fly cutting. Any opinions would be appreciated!
I would be shocked if that didn't clear.
You should have plenty of clearence.
Lift is very mininum of P/V clearence.
This is something many people dont realize.
In fact I would get yourself a set of .040 gaskets with that combo and get the Compression up a bit more.
Patriot welds the chamber's to get them to 64 instead of milling them which is great for added clearence.
Have fun with the new power.
You should have plenty of clearence.
Lift is very mininum of P/V clearence.
This is something many people dont realize.
In fact I would get yourself a set of .040 gaskets with that combo and get the Compression up a bit more.
Patriot welds the chamber's to get them to 64 instead of milling them which is great for added clearence.
Have fun with the new power.
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From: Farmingville, New York
Thanks for the replys everyone! I absolutely plan on checking anyway, but I just wanted to see what your opinions were (the experts
). As far as the head gasket goes, Patriot suggested using a '99-'01 head gasket set to bump the compression to 10.7:1. Have a happy, safe holiday season!
). As far as the head gasket goes, Patriot suggested using a '99-'01 head gasket set to bump the compression to 10.7:1. Have a happy, safe holiday season! Last edited by fast01; Dec 22, 2007 at 01:37 PM.
Thread Starter
TECH Enthusiast
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From: Farmingville, New York
I understand that the valve events have more to do with PTV clearance than lift does, I should have worded my question different and left out the 1.75:1 thing. I do appreciate the responses though! That's one thing this board is good for, honest, knowledgeable replys. As far as Patriot welding the chambers, it's true that they don't do it anymore. I spoke with them a few days ago and they said they only use the 243 castings now that don't require welding. I ordered the heads from one of their dealers, not from them. The dealer had a few sets of the old 035's (that are welded) on the shelf they were looking to clear out. I couldn't pass up the deal!
P.S.
Please don't ask me where I got them as they are not a sponsor and I don't want to break the rules. Thanks!
P.S.
Please don't ask me where I got them as they are not a sponsor and I don't want to break the rules. Thanks!
Edit... Looks like these were the welded castings that are older and on the shelf somewhere.
