PAC 1518 recall / breaking??
03-29-2011, 08:13 AM
#48
TECH Enthusiast
iTrader: (3)
Join Date: Apr 2007
Location: Oklahoma
Posts: 566
Likes: 0
Received 0 Likes
on
0 Posts
Hardtop can you tell me when you ordered yours? I no longer have my box so I don't know my batch number but I ordered
Mine I believe on march 2nd. They have been on the car for almost 1k miles so far without a problem.
Mine I believe on march 2nd. They have been on the car for almost 1k miles so far without a problem.
03-29-2011, 10:34 AM
#50
LS1Tech Sponsor
ASA springs Not sure where this information is coming from but it is not accurate. PSI was not the supplier of the ASA valve springs. The LS1 ASA engines produced by GM and by Lingenfelter Performance Engineering all used GM production LS6 valve springs. The early engines used the 2001 LS6 springs. The later engines used the 2002-2004 LS6 springs (that replaced the 2001 spring design).
PSI maxlife beehives have a media surface enhancement that smooths the
wire to reduce imperfections which could cause cracks and it helps the oil
drain off faster removing heat to extend spring life. These were designed
originally for ls stockcar racing (ASA) used by Lingenfelter and Wegner Racing
when they had the GM account. I've heard they last forever even w/today's
more aggressive lobe profiles. FWIW @370 lbs open .625 lift...if your cam has
.610 theoretical lift....factoring in deflection....a dial indicator would show the
retainer is only moving .590 and springs usually lose some pressure after a few
heat cycles so you'ld end up @ around 320-325 open pressure.
wire to reduce imperfections which could cause cracks and it helps the oil
drain off faster removing heat to extend spring life. These were designed
originally for ls stockcar racing (ASA) used by Lingenfelter and Wegner Racing
when they had the GM account. I've heard they last forever even w/today's
more aggressive lobe profiles. FWIW @370 lbs open .625 lift...if your cam has
.610 theoretical lift....factoring in deflection....a dial indicator would show the
retainer is only moving .590 and springs usually lose some pressure after a few
heat cycles so you'ld end up @ around 320-325 open pressure.
03-29-2011, 11:25 AM
#51
Sorry Jason my wording was incorrect. I know PSI was not the "supplier"
but rather developed a spring with exceptional endurance qualities as needed
in stockcar racing. The only LS racing series I knew of that existed was ASA
to which I know you guys freshened the engines. I suppose any spring other
than the GM may have been a rules infraction however someone @ Wegner
did tell me they used them. I was only trying to suggest an alternative B hive
since I see threads about other brand names having occasional issues
maybe due to todays more aggresive lobes....not sure......
again I apologize for my improper statement
but rather developed a spring with exceptional endurance qualities as needed
in stockcar racing. The only LS racing series I knew of that existed was ASA
to which I know you guys freshened the engines. I suppose any spring other
than the GM may have been a rules infraction however someone @ Wegner
did tell me they used them. I was only trying to suggest an alternative B hive
since I see threads about other brand names having occasional issues
maybe due to todays more aggresive lobes....not sure......
again I apologize for my improper statement
03-29-2011, 11:38 AM
#52
TECH Fanatic
Thats the same batch that have just been installed on my engine, i sent an e-mail to PAC but they didn't bother to reply, i gave them my batch number.
03-29-2011, 04:40 PM
#53
I just got word back from PAC about the springs we (Texas Speed) have sold and have good news! First, to clarify, because we buy them in such quantities, some of our stocking orders are shipped to us in bulk boxes instead of individuals and then we box them here. I am told that absolutely NONE of the bulk order springs that we have received from PAC were in the affected batches that they are concerned about and/or replacing. if you've got any of the boxes of 16 springs labeled by PAC with the batch number and all, and want to check your batch to see if they had issues, feel free to contact us! We are still installing and running the PAC springs with 100% confidence in them, and encourage our customers to do the same! Let us know if we can help with anything else!
__________________
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Last edited by Sales2@Texas-speed; 03-29-2011 at 05:07 PM.
03-29-2011, 05:03 PM
#54
TECH Resident
Thread Starter
03-29-2011, 08:47 PM
#56
TECH Resident
Thread Starter
You did not happen to find out what the other batch numbers were, if there was any???
03-30-2011, 08:31 AM
#58
There's plenty of thread about dual springs breaking if you look for them. I've run PAC beehives for the last 5 years with 100% success and I like to think i push the springs quite hard 
Currently have a 260/264 .685/.685 in there now with PAC beehives, it goes over 7000rpm reliably....
03-30-2011, 09:40 AM
#59
There's plenty of thread about dual springs breaking if you look for them. I've run PAC beehives for the last 5 years with 100% success and I like to think i push the springs quite hard Currently have a 260/264 .685/.685 in there now with PAC beehives, it goes over 7000rpm reliably....