Broken valve spring dampers

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Oct 12, 2012 | 12:20 PM

#21

TurboBuick6

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The PAC-1212X is an upgraded LT4 spring. Has more seat load and rate while maintaing the exact ID and OD dimensions. Complete drop in deal.

Oct 12, 2012 | 04:36 PM

#22

guppymech

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From: Chicagoland

^^^ Thanks for the info on these springs. They will work perfect for my setup.
Also considering Isky 235D springs.

Oct 12, 2012 | 05:07 PM

#23

speed_demon24

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From: Ocala, FL

Quote:

Originally Posted by TurboBuick6

The PAC-1212X is an upgraded LT4 spring. Has more seat load and rate while maintaing the exact ID and OD dimensions. Complete drop in deal.

I would stay away from PAC. I changed my first set out at 20k miles, and this is what happend with my 2nd set at 6k. Mostly highway miles too.

Oct 13, 2012 | 08:50 AM

#24

Adam1203

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when I spoke to my machine shop about my springs breaking they told me a lot of the springs that break are from improper setup. I am not saying you didn't set them up properly but it is possible. Also like pointed out to me by people on the forum they are a ware ant tear part.

Oct 15, 2012 | 04:31 PM

#25

TurboBuick6

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Quote:

Originally Posted by guppymech

^^^ Thanks for the info on these springs. They will work perfect for my setup.
Also considering Isky 235D springs.

The PAC-1201 is same OD as the Isky with tons more rate. A big spring in IMCA stock car racing. Guys are turning over 7500 all day with that one. If your build is moderate the PAC-1200 has a little smaller OD with the same ID as the 1201 and has about 25lbs more open than the 235D.

Nov 1, 2012 | 10:43 PM

#26

guppymech

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From: Chicagoland

Zebisko, If you're still looking for springs, I just installed a set of those PAC-1212X springs with the stock LT1 retainers and seats. They are a Huge improvement over the LT4 springs I was using on my Hotcam. My engine never revved so clean and strong to my 6k shift light with the LT4 springs. I'm looking forward to moving the shift light up to 6200 for track use. I bought them at sponsor Carshopinc.com, Tim over there had a great price on them.

Nov 2, 2012 | 08:31 AM

#27

TurboBuick6

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Glad the springs are working well for you Guppy!

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