Introducing The All New PRC Spring Kit
#1
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After nearly a year of development & tweaking we're proud to announce that the all new Precision Race Components LSx spring kit is now available!
This valve spring is the result of countless hours of testing and comparing to both the previous versions of our springs along with several other competitors valve springs. (some of which cost over $500 per set)
The goal was to develop a valve spring that offers increased pressures & lift capacity for the newer more aggressive LS camshafts that are currently being built.
While the previous version LS spring that PRC & so many of our competitors have used for years is a great spring, it's simply a several year old design that wasn't built specifically for the camshafts being produced today.
A few of the goals we wanted to accomplish were:
Increased Pressures
Increased Lift Capacities
Much Longer Spring Life
Higher RPM Stability
The new PRC spring kit is built out of a EHT Chrome Silicon with special processing that helps to provide us a spring life that testing has shown to be well over 3 times the life of any LS spring currently on the market! Testing has shown that after 20,000,000 cycles this new valve spring lost 1% pressure @ the seat & open!!
The new spring checks:
1.800" = 161lbs
1.150" = 472lbs
The spring coil binds below 1.080" allowing for nice lift capability!!
The EHT Chrome Silicon valve spring material allows for well over 3 times the life of our previous double spring.
Inner & outer springs who's individual & combined harmonics were carefully studied in a effort to create a spring who's harmonics allow for heavier after market rockers as well as much higher rpm ranges while maintaining valve-train control!!
While the valve spring is designed for hyd. applications, we recently tested a set of the springs installed on a 416ci LSx using PRC 237cc heads & a .708" lift solid roller camshaft. While this combo through the FAST intake doesn't show off the high rpm abilities of this new valve spring, it clearly shows that the spring can easily handle some pretty wild applications. I have dyno sheets of the spring controlling the .708" lift spring on a 2.100" stainless valve well past 7400rpm. While this is well out of the range of intended use, it shows how truly versatile this valve spring is.
The truly beautiful thing about this new spring package is that at $350 a set they're only slightly more expensive than the standard PRC double spring, and over $200 a set less than it's nearest competitor that supposedly uses the same material! For basically $75 more than the current PRC spring you get a spring capable of running 2-3 times the life of the previous gold/platinum valve spring!!!
In a effort to offer the most complete line of products for our customers, we will continue to offer the standard PRC Platinum Spring Kit for budget minded customers. We're also currently working on a beehive single spring that should be ready to go in the next couple of months!
Now for the pics & one of the dyno sheets from the solid cammed 416 with PRC 237 cylinder heads!
![](http://www.precisionracecomponents.com/newspringkit1.jpg)
![](http://www.precisionracecomponents.com/newspringkit2.jpg)
This valve spring is the result of countless hours of testing and comparing to both the previous versions of our springs along with several other competitors valve springs. (some of which cost over $500 per set)
The goal was to develop a valve spring that offers increased pressures & lift capacity for the newer more aggressive LS camshafts that are currently being built.
While the previous version LS spring that PRC & so many of our competitors have used for years is a great spring, it's simply a several year old design that wasn't built specifically for the camshafts being produced today.
A few of the goals we wanted to accomplish were:
Increased Pressures
Increased Lift Capacities
Much Longer Spring Life
Higher RPM Stability
The new PRC spring kit is built out of a EHT Chrome Silicon with special processing that helps to provide us a spring life that testing has shown to be well over 3 times the life of any LS spring currently on the market! Testing has shown that after 20,000,000 cycles this new valve spring lost 1% pressure @ the seat & open!!
The new spring checks:
1.800" = 161lbs
1.150" = 472lbs
The spring coil binds below 1.080" allowing for nice lift capability!!
The EHT Chrome Silicon valve spring material allows for well over 3 times the life of our previous double spring.
Inner & outer springs who's individual & combined harmonics were carefully studied in a effort to create a spring who's harmonics allow for heavier after market rockers as well as much higher rpm ranges while maintaining valve-train control!!
While the valve spring is designed for hyd. applications, we recently tested a set of the springs installed on a 416ci LSx using PRC 237cc heads & a .708" lift solid roller camshaft. While this combo through the FAST intake doesn't show off the high rpm abilities of this new valve spring, it clearly shows that the spring can easily handle some pretty wild applications. I have dyno sheets of the spring controlling the .708" lift spring on a 2.100" stainless valve well past 7400rpm. While this is well out of the range of intended use, it shows how truly versatile this valve spring is.
The truly beautiful thing about this new spring package is that at $350 a set they're only slightly more expensive than the standard PRC double spring, and over $200 a set less than it's nearest competitor that supposedly uses the same material! For basically $75 more than the current PRC spring you get a spring capable of running 2-3 times the life of the previous gold/platinum valve spring!!!
In a effort to offer the most complete line of products for our customers, we will continue to offer the standard PRC Platinum Spring Kit for budget minded customers. We're also currently working on a beehive single spring that should be ready to go in the next couple of months!
Now for the pics & one of the dyno sheets from the solid cammed 416 with PRC 237 cylinder heads!
![](http://www.precisionracecomponents.com/newspringkit1.jpg)
![](http://www.precisionracecomponents.com/newspringkit2.jpg)
![](http://www.precisionracecomponents.com/springdyno.jpg)
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
#2
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So when you say they're available, does that mean they're ready to ship today? If so, this is great news.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
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2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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We've got this kit rated at a max lift of .675". Of course you should still setup the installed heights according to your specific cam/head combo, ensure stability in the valvetrain by using quality rockers/valves/lifters/ etc, just like you should with any spring kit you install!
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We've got this kit rated at a max lift of .675". Of course you should still setup the installed heights according to your specific cam/head combo, ensure stability in the valvetrain by using quality rockers/valves/lifters/ etc, just like you should with any spring kit you install!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
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#14
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Boosted it should work just fine in that application. I wouldnt expect you to need shiming.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
#15
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SoCal if the valve in a L92 or LS7 is solid stainless I might try to shim them & keep them at a little bit less lift. I believe the spring could probably do it, but better safe than sorry. I'll let you know shortly how many rpm the spring can take the stock L92 valve & stainless ls7 valves next time I'm on the engine dyno. With the way the spring resist pressure losses even with the 20,000,000 cycle testing I think it will hold up extremely well even with the heavy valves.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
#17
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ok, probably a silly newbie tech question, but i will ask anyway...
When swapping out springs, do i need any special tools or anything like that? I plan on swapping springs soon, and these look like a good choice. So when i do order these, i plan on doing it at home woith the help of a buddy. IS it hard to install springs? are any special hardware or tools needed?
When swapping out springs, do i need any special tools or anything like that? I plan on swapping springs soon, and these look like a good choice. So when i do order these, i plan on doing it at home woith the help of a buddy. IS it hard to install springs? are any special hardware or tools needed?
#18
FormerVendor
iTrader: (64)
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ok, probably a silly newbie tech question, but i will ask anyway...
When swapping out springs, do i need any special tools or anything like that? I plan on swapping springs soon, and these look like a good choice. So when i do order these, i plan on doing it at home woith the help of a buddy. IS it hard to install springs? are any special hardware or tools needed?
When swapping out springs, do i need any special tools or anything like that? I plan on swapping springs soon, and these look like a good choice. So when i do order these, i plan on doing it at home woith the help of a buddy. IS it hard to install springs? are any special hardware or tools needed?
#19
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best of luck.
#20
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ok, probably a silly newbie tech question, but i will ask anyway...
When swapping out springs, do i need any special tools or anything like that? I plan on swapping springs soon, and these look like a good choice. So when i do order these, i plan on doing it at home woith the help of a buddy. IS it hard to install springs? are any special hardware or tools needed?
When swapping out springs, do i need any special tools or anything like that? I plan on swapping springs soon, and these look like a good choice. So when i do order these, i plan on doing it at home woith the help of a buddy. IS it hard to install springs? are any special hardware or tools needed?
You'll need the ability to pressurize the cylinder you are changing the springs for so that the valves do not fall when you remove the springs. Also, a good spring compressor tool (Crane is my preference if you can still find one anywhere) is a good investment over the cheap tool that Autozone sells/rents.
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
![](https://ls1tech.com/forums/signaturepics/sigpic110569_2.gif)
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!