Little Update
#22
Wicked & Speed Demon,
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
#24
11 Second Club
iTrader: (6)
Wicked & Speed Demon,
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
#25
11 Second Club
iTrader: (6)
#26
Sorry for the thread hi-jack, Wicked. I'm done.
http://www.camaroz28.com/forums/lt1-...ailure-593936/
http://www.ls1gto.com/forums/showpos...83&postcount=3
http://www.challengertalk.com/forums...-recall-53269/
http://www.yellowbullet.com/forum/sh....php?p=5889530
http://www.lxforums.com/board/f71/im...ailure-265299/
https://ls1tech.com/forums/ls4-perfo...king-good.html
http://www.lxforums.com/board/f71/pa...ge-pwr-257078/
http://www.camaroz28.com/forums/adva...spring-764824/
I accidentally deleted some of them.
http://www.ls1gto.com/forums/showpos...83&postcount=3
http://www.challengertalk.com/forums...-recall-53269/
http://www.yellowbullet.com/forum/sh....php?p=5889530
http://www.lxforums.com/board/f71/im...ailure-265299/
https://ls1tech.com/forums/ls4-perfo...king-good.html
http://www.lxforums.com/board/f71/pa...ge-pwr-257078/
http://www.camaroz28.com/forums/adva...spring-764824/
I accidentally deleted some of them.
Last edited by Alex94TAGT; 01-23-2012 at 03:17 PM.
#27
Wicked & Speed Demon,
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
#29
9 Second Club
iTrader: (7)
Wicked & Speed Demon,
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
If you don't mind my asking, what model # are the PAC springs you've had fail?
I've got a set of nitrided 1519s ready to go in with a different cam, and since you've brought it to my attention, I've found more than a dozen threads on PAC spring failures -- and it doesn't seem limited to one model. PAC claims to have narrowed the faulty springs down to 2 specific batch numbers circa Oct. 2010, if that is to be believed.
Not sure whether it's worth the risk of trashing my valves/guides/pistons. Thinking I should probably send these back and stick with some other brand of dual-coils. Too bad I already bought a beehive micrometer, but that's a small price to pay...
#30
#31
9 Second Club
iTrader: (7)
my LS2 i run a mild beehive its a 1500 series endurance spring from PSI.....runs #125 seat....will control the valve with stock parts other than the spring to 7000 ive been shifting it at 6700
#32
******* heads are taking forever... machine shop that was empty when I dropped them off suddenly has so much work to do they can barely pick up the phone. Haven't even touched them since I dropped off the valves last monday. I understand that there's a foot of snow on the ground, but it'll be melted next week when I'd like to see how tolerable my new neighbors are
#33
******* heads are taking forever... machine shop that was empty when I dropped them off suddenly has so much work to do they can barely pick up the phone. Haven't even touched them since I dropped off the valves last monday. I understand that there's a foot of snow on the ground, but it'll be melted next week when I'd like to see how tolerable my new neighbors are
#35
9 Second Club
iTrader: (7)
******* heads are taking forever... machine shop that was empty when I dropped them off suddenly has so much work to do they can barely pick up the phone. Haven't even touched them since I dropped off the valves last monday. I understand that there's a foot of snow on the ground, but it'll be melted next week when I'd like to see how tolerable my new neighbors are
#36
And heads are done... shaved a total of 18.5 grams off the intake valve side. retainers, locks and valves are only 120.5 grams total now, not bad for a long 2.08 stainless valve. Car will be driving around today Will post pics of it going back together later this afternoon.
#39
And heads are done... shaved a total of 18.5 grams off the intake valve side. retainers, locks and valves are only 120.5 grams total now, not bad for a long 2.08 stainless valve. Car will be driving around today Will post pics of it going back together later this afternoon.