Re: Need valve spring recommendations for Victor heads
[Re: lancer493]
#2591589
12/14/18 12:33 AM
12/14/18 12:33 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Did you ask Mike at B3? Porter should have a good idea as well. I don't like making spring recommendations as I like more spring load than most and if I'm not doing the work I don't want to say how to do something.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Need valve spring recommendations for Victor heads
[Re: lancer493]
#2591595
12/14/18 12:46 AM
12/14/18 12:46 AM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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I can tell you what I run on mine w/ a 1.90" installed height: PAC 1243s w/ ti retainers. PAC say's they're maxed out at .700" lift at that installed height, too.... 240# closed, about 625# at max lift, I think.
Whether you can spin your valve train to 7500 isn't something I think anyone can say w/o having first-hand experience w/ all the same parts (cam lobe family, pushrods, etc.). We ran mine up to 7200 w/ a COMP .650" (.655" measured net lift after lash) roller, older Hughes 1.6 rockers, and .120"-wall x 3/8" Smith Bros pushrods.
Last edited by BradH; 12/14/18 01:10 AM.
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Re: Need valve spring recommendations for Victor heads
[Re: lancer493]
#2591755
12/14/18 12:33 PM
12/14/18 12:33 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Running PAC 1326 springs at 2.00" install height. I think the retainers are +0.100", and PAC machined down the spring locators to 0.030" thick. Running a hair less duration, but 0.726" lift with the T&D 1.6:1 rocker arms. I think the retainer keepers were stock, and running lash caps. Got a deal on the springs from my cylinder head guy (paid about what the 1200 series cost) who had them for another project where they were not used (or the guy bulked at the cost?) My cylinder head guy setup the install height so not sure on the keepers used, but I recalled the special order spring locators, and retainers were all from PAC.
My old setup used PAC 1325 springs, and the +0.100" Ti retainers from Crower with Manley spring locators. I think that setup may have used +0.050" keepers.
Make sure to check piston to valve clearance with that much duration.
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Re: Need valve spring recommendations for Victor heads
[Re: lancer493]
#2591767
12/14/18 12:44 PM
12/14/18 12:44 PM
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Joined: Jan 2003
Posts: 14,496 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,496
So. Burlington, Vt.
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I’d mock up the valvetrain when you get everything back and check the net lift at the valve with a spring load similar to what you’ll be using. Then you’ll know exactly how much lift you’re dealing with, so a better decision can be made on the springs.
I’d also check with the cam grinder and get a sense of how much spring they feel you’ll need to get to 7500 with steel valves.
Without knowing any of that, I’d say you’ll probably need to figure out a way of getting to 1.950, and using something like a PAC 1225.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Need valve spring recommendations for Victor heads
[Re: lancer493]
#2591824
12/14/18 02:01 PM
12/14/18 02:01 PM
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Joined: Aug 2003
Posts: 1,313 Charlotte, NC
LSP
pro stock
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pro stock
Joined: Aug 2003
Posts: 1,313
Charlotte, NC
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I am using these ported Victor heads in a race only application.Mike at B3 Racing is currently building me a rocker geometry correction kit for the Hughes rockers. Since this engine is only 493cu. in.,I would like to be able to rev this motor to 7500 if needed. It is a solid roller,with 280*/283*@ .050 w/.690 lift. It appears that I am probably looking at a 1.90" installed height.Does anyone have a solid spring/retainer combo that they wish to share? The PAC reps seemed to be involved at a seminar right now. These heads are a challenge,but they should make some power if they really flow like they claim and I am able to get the valve gear right. Thanks, Bill What is valve weight? Lobe duration @ .020" Net valve lift after deflection & lash?
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