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J Slane 02-01-2016 01:14 AM
Valve springs
 
I have pac Springs on my O 41 heads, spring pressures run between 270 and 310. I have lots of room, no shim under the springs. When they were new, spring pressure 350lbs. I have enough room to run a 60 shim and will not coil bind. Would a 60 make much of a difference in pressure. Any suggestions Thanks Jay. GT\DA

Mike Taylor 3601 02-01-2016 09:57 AM
Re: Valve springs
 
yes that will raise pressure,maybe time for a new set though install them to where they are .060'' from coil bind if they are 1409X will be about 425-450 like that.
Mike Taylor 3601

Mike Pearson 02-01-2016 08:02 PM
Re: Valve springs
 
Quote:
Originally Posted by Mike Taylor 3601 (Post 494118)
yes that will raise pressure,maybe time for a new set though install them to where they are .060'' from coil bind if they are 1409X will be about 425-450 like that.
Mike Taylor 3601
They are the PAC 1.500 double spring that sets up at 2.100. They are pretty old but trying to get a few more runs before a new set.

Mike Pearson 02-01-2016 08:08 PM
Re: Valve springs
 
Quote:
Originally Posted by Mike Pearson (Post 494156)
They are the PAC 1.500 double spring that sets up at 2.100. They are pretty old but trying to get a few more runs before a new set.
They are the Pac 1332 spring. Any one know the rate on these springs.

james schaechter 02-01-2016 09:42 PM
Re: Valve springs
 
I think everything you need is in the PAC web site

http://www.racingsprings.com/ValveSpringRateCalculator

Mike Pearson 02-02-2016 02:53 PM
Re: Valve springs
 
Quote:
Originally Posted by james schaechter (Post 494169)
I think everything you need is in the PAC web site

http://www.racingsprings.com/ValveSpringRateCalculator
Thanks James. That's a nice tool. I never noticed that before on their website.


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