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! |
Just check it |
I'm certainly going to! I just wanted to see if I should plan for the worst case scenerio....flycut. |
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. |
it will clear-but always check even if u or anyone thinks or say's it will clear- |
it will clear fine. |
I would call Gunnar at Patriot |
it will clear if installed properly |
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! |
Originally Posted by MPHmotorsports
(Post 8349312)
...Patriot welds the chamber's to get them to 64 instead of milling them which is great for added clearence... |
Duration and the intake valve opening & exhaust valve closing points determine PTV clearance. The lift has little to do with it, as the valves are barely off the seats at TDC. |
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! |
Originally Posted by itslow
(Post 8351893)
Patriot no longer welds the chambers; milling is now the route that's taken to alter chamber volumes. Edit... Looks like these were the welded castings that are older and on the shelf somewhere. |
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