PAC 1518 recall / breaking??
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....
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I think most spring breakage threads you find are due to improper install not manufacture defect. But yes even dual springs break, a quick search will pull up lots of threads about it.
It must just be due to jack legs not checking install height and for coil bind then, there may be threads about dual springs breaking but at least you have a better chance of the valve not dropping with the dauls.
The oem springs have broken on the z06 bot mine has 120k and has been held close to 170mph running around 6300 rpm for decent periods of time with out issue other then blown hole in muffler. There machine I guess some of us are lucky. If I run higher then .60 will I get float. What the limit roughly
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Last edited by ls1 1990 VN; May 13, 2011 at 01:54 AM.
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Thread Starter
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From: Frozen Tundra, WI
What am I missing...same batch/date numbers and one guy is told they are bad and the other that they are good?????????
Last edited by Paul57; Apr 1, 2011 at 06:09 AM. Reason: added "date"
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Why Paul57 had his exchanged or was told different i don't no! Was his just replaced incase by TSP maybe.
Just re-read Paul57s post....Is Matt at PAC confused here or has something changed for him to one minute say this whole batch-manufacture number is crook to one guy then say it's all good to another!!!!
Last edited by ls1 1990 VN; Apr 1, 2011 at 03:28 AM.
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....If so mine broke last year around May.and i posted here with pics
Launching!
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the batch on the left is recalled...set on the right went 30,000+miles...
oops ...currently mine is sporting 3 snapped,maybe a few more after i get off my lazy *** and look further...i pulled the valve cover and said **** it,beer thirty....
for the nostalgic,here's my old trusty 918's back in 2008...more beer thirty...
oops
...currently mine is sporting 3 snapped,maybe a few more after i get off my lazy *** and look further...i pulled the valve cover and said **** it,beer thirty....for the nostalgic,here's my old trusty 918's back in 2008...more beer thirty...
If you want a beehive spring that isn't going to break, and will handle .620-.630 lift ALL day, use the PSI 1511 "Max life" spring. I use that beehive on LSL lobe cams with great results and no issues.
FWIW, I hope PAC doesn't have an issue w/ the 1518's. I've installed 2-3 sets within the past few months.
FWIW, I hope PAC doesn't have an issue w/ the 1518's. I've installed 2-3 sets within the past few months.
any of the sponsor carry them?
Thanks
Launching!
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From: Clinton Twp, MI
I just had a PAC 1518 failure. I bought a set of used L92 heads with them on them. Seller said they only had about 1k miles on them. They were very clean.
My engine ran ok for about almost an hour after first starting it. Then I had a noise and found a broken spring just like in the pictures!
This sucks
My engine ran ok for about almost an hour after first starting it. Then I had a noise and found a broken spring just like in the pictures!
This sucks
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From: Frozen Tundra, WI
That does suck!! Are you able to ask the seller if he has any purchase info on the springs...to see if they are part of the bad batch that was referred too?? Did you let the motor get up to a decent temp before winding it up??
