looking at doing a heads and cam lq9 id like to use a comp xer lobe 232/234 595/598 on a 112 with a set of patriot stage two ls6 heads with 59ccs all ready have a yank ss3600 peforma lev2 tranny and 4.10s. what is the max lift i can do without having ptv issues i think its 600. btw its going in a RCSB 2wd and ill probanly run the stock truck intake till i get some money for a fast or a ls6.

 

anybody out there

 

there are many more variables for ptv clearance than valve lift. you will need to measure if you are unsure. shouldn't be too hard if you are swapping heads also.

 

thats what i figured the duration has alot to do with it to i just found out. but what i really wanted to know is does this sound like a good combo id like to get between 380 to 400 to the tires all motor

 

I think you will more than likely be good on the lift. The MS4 has more lift and works in a stock LS2. However I am concerned about my other cam. Its a 240 with .635 lift. Anyone have facts? Im also on LS1 heads and that may make a difference as well?

 

That is quite a bit of milling on those heads to go with that lift and having no valve reliefs. If you do it certainly check them. It's really not hard at all if you have the heads off.

 

so your saying just saying put some molding clay on the piston and put the head on and see what happens if worse comes to worse all ill have to do is get out the isky tool witch i dont have and put some reliefs in the pistons

 

I had that cam (XER281) in a LS3 manual tranny vette. It put down 458 rwhp and 440 tq. If your heads aren't milled too much you shouldn't have a problem with PTV clearance. But....you'd be wise to check. If you're sold on that cam, I might be willing to part with mine. It has about 3000 miles on it.

 

You could use the molded clay. I like to get direct measurements. Take a valve spring off of one intake and one exhaust valve. Not at the same time though. Set the head on the engine holding the valve up. Once it's on the engine lower the valve until it hits the piston and measure how far down that is from it's seated point with a dial indicator. Subract your valve lift numbers and you'll have an idea. I like to do it without the head gasket in there and use the estimated crush height of the gasket in the figure if needed. Having the head off and using a dial indicator makes sure you can also be positive that the piston is at tdc.

 

how much you looking to get for it
ok thanks zippy all this info is great