LivnTheDream23 Posted March 28, 2012 Report Share Posted March 28, 2012 Got a cam going in over at IPS in a few weeks and wanted to see what others think of my cam choice. My main concern being PTV clearance. Cam spec... 231/238 .638”/.615” 113LSA +3 Comp EHI/LXL lobes Cam was Specd out by Pat Guerra. Car is a 2010 LS3 c6. Hoping to make anything north of 470. Quote Link to comment Share on other sites More sharing options...
LivnTheDream23 Posted March 28, 2012 Author Report Share Posted March 28, 2012 according to pat G. I will be at .070 on the intake side. Quote Link to comment Share on other sites More sharing options...
rl Posted March 29, 2012 Report Share Posted March 29, 2012 The only way to know is to check. Quote Link to comment Share on other sites More sharing options...
LivnTheDream23 Posted March 29, 2012 Author Report Share Posted March 29, 2012 I realize this, but I would perfer not to order the cam if the PTV may be to close. Quote Link to comment Share on other sites More sharing options...
JuicedH22 Posted March 29, 2012 Report Share Posted March 29, 2012 0.070 on the intake side isnt horrible. Consider there are many guys running the LGM G6X3 on a stock ls3, which is much closer PTV (less than 0.050")... if you have hydraulic lifters, shouldnt be an issue at all.. Quote Link to comment Share on other sites More sharing options...
LivnTheDream23 Posted March 29, 2012 Author Report Share Posted March 29, 2012 (edited) yea, stock hydraulic lifters. is there a way to check PTV other than the clay. Edited March 29, 2012 by LivnTheDream23 Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted March 29, 2012 Report Share Posted March 29, 2012 yea, stock hydraulic lifters. is there a way to check PTV other than the clay. Start the motor............. Quote Link to comment Share on other sites More sharing options...
JuicedH22 Posted March 29, 2012 Report Share Posted March 29, 2012 THe BEST way to measure IMO is to use dial indicators. You will still need to replace the hydraulic lifter with a solid lifter, and use a check spring in place of the valvespring. (you can get a check spring from Home Depot... they have these packs of screen door springs for like 5 bucks) and for a solid lifter, I just welded a bad hydraulic one. Also make sure you use a head gasket (an old one since you will toss it when done) and tq the heads down.... here is what it looks like all set up: http://i30.photobucket.com/albums/c318/Juicedh22/IMG_2352.jpg Quote Link to comment Share on other sites More sharing options...
LivnTheDream23 Posted March 29, 2012 Author Report Share Posted March 29, 2012 Start the motor............. yea but you have heating of the metals and such, so what might work at cold start up might not work with back to back 2-4th gear runs... THe BEST way to measure IMO is to use dial indicators. You will still need to replace the hydraulic lifter with a solid lifter, and use a check spring in place of the valvespring. (you can get a check spring from Home Depot... they have these packs of screen door springs for like 5 bucks) and for a solid lifter, I just welded a bad hydraulic one. Also make sure you use a head gasket (an old one since you will toss it when done) and tq the heads down.... here is what it looks like all set up: http://i30.photobucket.com/albums/c318/Juicedh22/IMG_2352.jpg Is that something a shop does/or I can request, when they put a cam in? great info by the way.. Quote Link to comment Share on other sites More sharing options...
Richard Cranium Posted March 29, 2012 Report Share Posted March 29, 2012 Did you pick the cam, or did IPS recommend it? If IPS recommended it, then I would say it's their responsibility to make sure the clearance is correct. I think Dave was kidding about "Start the motor", although you will find out if you have adequate clearance or not very quickly. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted March 29, 2012 Report Share Posted March 29, 2012 yea but you have heating of the metals and such, so what might work at cold start up might not work with back to back 2-4th gear runs... I was just being an ass. Nothing is going to be "easy" to check for that. If it's questionable, then check. Quote Link to comment Share on other sites More sharing options...
LivnTheDream23 Posted March 29, 2012 Author Report Share Posted March 29, 2012 Did you pick the cam, or did IPS recommend it? If IPS recommended it, then I would say it's their responsibility to make sure the clearance is correct. I think Dave was kidding about "Start the motor", although you will find out if you have adequate clearance or not very quickly. It was specd out by Pat Guerra. I was just being an ass. Nothing is going to be "easy" to check for that. If it's questionable, then check. I figured you were. Ok thanks guys. I have IPS looking into it. Quote Link to comment Share on other sites More sharing options...
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