Generation IV Internal Engine - Whiplash PTV clearance



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CTP_YELLOWJACKET
05-09-2012, 07:08 PM
Hey guys, I'm putting a EG whiplash cam in my 05 GTO. I've got the cam, springs and pushrods but I'm wondering about the ptv clearance before I install everything. EG told me the ptv clearance is .130 with the cam....is this good or bad? Thanks!

Tainted
05-09-2012, 07:21 PM
well theres a few things to consider, first are your heads milled any?
CTP_YELLOWJACKET
05-09-2012, 07:27 PM
well theres a few things to consider, first are your heads milled any?

No sir, heads are stock 243 heads.

CTP_YELLOWJACKET
05-09-2012, 07:28 PM
well theres a few things to consider, first are your heads milled any?

Just to clarify, EG said it was .130 on stock heads, I'm just not a guru at understanding what the numbers mean lol. I've read minimum for the LS2 is .080-.100, so im assuming with .130, the cam would be safe to run?
Tainted
05-09-2012, 07:31 PM
should be ok then
CTP_YELLOWJACKET
05-09-2012, 07:33 PM
should be ok then

Cool deal, thanks!
outkast6991
05-09-2012, 09:36 PM
If the specs are close to the Internet guess of 24x/25x I'm calling bs on .130 clearance. I'd be measuring that one for sure
bww3588
05-10-2012, 12:08 AM
I'd measure a stock cam....

I wouldn't trust anyone's opinion on The internet about a critical engine measurement.
427 zeo6
05-10-2012, 03:53 PM
My LS3 has 0.130"ptv on the intake valve with NO lift with piston at TDC. Put a Comp Cam in the motor and ptv went to 0.040". Now its time for Mahle pistons.....
Tainted
05-10-2012, 04:47 PM
OP this thread could help you to an extent. Its active now in the gen III internal section

http://ls1tech.com/forums/generation-iii-internal-engine/1545637-minimum-ptv-clearance.html#post16297101
CTP_YELLOWJACKET
05-10-2012, 05:36 PM
OP this thread could help you to an extent. Its active now in the gen III internal section

http://ls1tech.com/forums/generation-iii-internal-engine/1545637-minimum-ptv-clearance.html#post16297101

Thanks!
CTP_YELLOWJACKET
05-10-2012, 05:38 PM
If the specs are close to the Internet guess of 24x/25x I'm calling bs on .130 clearance. I'd be measuring that one for sure

I'll have it measured when I go to install it for sure, I hope I would be able to trust the guys at EG to give me the right measurement though, I know every engine is a little different but it couldnt be too far off from their numbers if theyre correct. I just don't even want to bother installing it if I dont know what the ptv is beforehand, my car is a DD so I need to order other stuff if necessary so the install will go as planned with no problems.