valve spring materials
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Even when I had H-flat cams I used dual coil.
Comp Cams has a good selection of spring types
Last edited by gkull; Dec 26, 2008 at 08:23 AM.
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
I don't buy cheap stuff. I had valve float years ago running over 7000 rpm when the tranny failed. The cost of bent and broken off valve was so much that I said never again. So i better springs and replace them when they go down 20 pounds. Like 210 seat to 190#
Even when I had H-flat cams I used dual coil
Even when I had H-flat cams I used dual coil
silcone, super clean silcone, H11 tool to pacaloy.
Drifting
Joined: Jan 2006
Posts: 1,832
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From: Cedar,BC
Racer
Joined: Dec 2004
Posts: 410
Likes: 0
From: Wichita Kansas
Check Google for Associated Spring Co. They wrote a design manual and the Spring Reasearch and Manufactureres Association. The material used is important along with many other factors including surface prep. Almost all high quality springs are shot peened to increase their fatigue strength.
Melting Slicks
Joined: Feb 2006
Posts: 3,428
Likes: 5
From: Japan
You may also want to look at Ferrea's website. If you're cost-no-object, they're it- all the superrich racers that I used to associate with swore by their stuff. Being poor, I had to 'settle' for Manley and Crower.......
Race Director
Joined: Jan 2000
Posts: 13,018
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Look for the ones made by PAC. Several folks sell them under various names. Lately it seems there has been some quality issues getting good ones..but I think a lot has to do with setup.
I ran some Isky *NASCAR* springs on my 427 for a long time and they lasted forever even with .700 lift. Price was normal.
I'm currently running K-Motions on the 540. These have been in place for 5-6 years now. The intakes lost 10 psi and I swapped them and exhaust springs and they still go 7500 rpm with no issues.
JIM
I ran some Isky *NASCAR* springs on my 427 for a long time and they lasted forever even with .700 lift. Price was normal.
I'm currently running K-Motions on the 540. These have been in place for 5-6 years now. The intakes lost 10 psi and I swapped them and exhaust springs and they still go 7500 rpm with no issues.
JIM
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Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Look for the ones made by PAC. Several folks sell them under various names. Lately it seems there has been some quality issues getting good ones..but I think a lot has to do with setup.
I ran some Isky *NASCAR* springs on my 427 for a long time and they lasted forever even with .700 lift. Price was normal.
I'm currently running K-Motions on the 540. These have been in place for 5-6 years now. The intakes lost 10 psi and I swapped them and exhaust springs and they still go 7500 rpm with no issues.
JIM
I ran some Isky *NASCAR* springs on my 427 for a long time and they lasted forever even with .700 lift. Price was normal.
I'm currently running K-Motions on the 540. These have been in place for 5-6 years now. The intakes lost 10 psi and I swapped them and exhaust springs and they still go 7500 rpm with no issues.
JIM
I have noticed the adv. in summit for k-motion springs,they have chrome silcon, special silcon, H11 tool steel or M-3000 alloy.
This is what I'm trying to get an idea of as to what grade of wire in
a spring is something I would want, of course price can limit what I might want
I would just like to know what is good, very good or fantastic.
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Ok looked up K-motion valve springs, nascar obviously has some serious strong hard camshaft material for a flat tappit with the pressure, lifts they show on there nascar springs.
Probably billet cam like crower shows as an option.
wonder what nascar lifters are made of ?
Who sells the lifters ?
Probably billet cam like crower shows as an option.
wonder what nascar lifters are made of ?
Who sells the lifters ?
Race Director
Joined: Jan 2000
Posts: 13,018
Likes: 2,262
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
The NASCAR name was a marketing thing at the time. The springs weren't anything special really. I used them with a .720 lift SR cam for a long time and then used some +.050 keepers to drop seat pressure to 195 psi range for use with a Comp street roller. That was more spring than Comp spec'd..but it worked fine.
True NASCAR stuff is insane. The cores are welded on the lobes, the lifters are special etc. Last time I checked into it all you would be in the $2K+ for the setup.
Springs have a good bit of marketing hype going on with the names.
Ck these guys out.
http://www.racingsprings.com/
JIM
True NASCAR stuff is insane. The cores are welded on the lobes, the lifters are special etc. Last time I checked into it all you would be in the $2K+ for the setup.
Springs have a good bit of marketing hype going on with the names.
Ck these guys out.
http://www.racingsprings.com/
JIM
Drifting
Joined: Dec 1999
Posts: 1,462
Likes: 1
From: Reno nevada
non roller racing lifters are a much bigger diameter.
The price is a good indicator of how good the spring is. CC sells the beehives for about $800 per set. Or you could get custom titanium's for under $3000
The price is a good indicator of how good the spring is. CC sells the beehives for about $800 per set. Or you could get custom titanium's for under $3000
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Looking at PAC 427 hot rod showed theres a pro stock spring with
2.30 installed height 445 seat, 1400 pounds open pressure, they probably have at least a 2.50 sized intake valve made out of titanium turn about 10,000 rpm opening the valves probably over an inch still hard to imagine needing that kind of pressure wow.
2.30 installed height 445 seat, 1400 pounds open pressure, they probably have at least a 2.50 sized intake valve made out of titanium turn about 10,000 rpm opening the valves probably over an inch still hard to imagine needing that kind of pressure wow.