will either of these go right on without machining of the heads? What do you guy suggest between the two?

 

I was under the impression that they were one in the same spring, just different packaging.......of course it wouldn't be be first misunderstanding...

 

they are NOT the same spring. The Patriot Golds are a very nice piece and very affordable for the whole works. shouldnt need any head modification. Talk to Gunnar at Patriot and he will help you out.

 

Same spring.

The part number is Pioneer 053658 x quantity.

 

Exactly the same spring. !!!

What differs in a kit is that PP uses Different locks (Super L7 Locks, I think) and TSP uses stock ones....

 

what are the Super L7 Locks? Are they a differant type or what?

 

Huh? Texas Speed/PRC uses TITANIUM locks....

 

They are a machined lock instead of a factory stamped lock. Our spring kit is a great kit and has provided thousands of LS owners countless miles of performance... this is why other companies have followed our lead. It is a direct fit in a stock head with no machining required.

 

Cool, thanks man. I think I'm going to ditch the 918s and get a set of these.

 

Kind of off topic, but I've got 9k miles on my PRC Golds, when should I think about replacing them?

 

Maybe somebody else will know for sure but I have read that people have run 25k with no problem on them.

 

they use titanium retainers but uses stock locks

 

Good catch, you're right. Has anyone had a stock lock fail when properly installed?

 

I put over 30k on my PRC springs, Brian here had about 27k on his before replacing his. These were both on big cams and both on stalled automatics which cycle the springs much more than 6 speed cars. You should get at least 25k miles out of PRC spring kit no problem. Our springkit uses the stock locks and I dont think I've ever seen one fail.

 

I have 37,000 + miles on a set of dual springs from PRC..@..Texas speed and they are still running fine..using them on a 233\233 .595\.595 112 cam from Texas Speed and Performance..a dailey driver..good product and a great value..I let my engine warm up for about 5 minutes each moring before I drive away..124,000 + miles on the engine with no oil consumption and it keeps the springs happy too..

 

Wouldn't valve spring life be a function of MANYparameters; lift, duration, duration/lift, shim thickness (coil bind clearance), average RPM, warm-up, over heating, etc... and the list could go on.

Maybe it would just be best to check them periodically on a valvespring tester with no rule-of-thumb? If you can't test them, change them out. Replacement springs aren't that expensive for the PRC kit.

Ben T.

 

Excellent point, we suggest that the pressure be checked every 5,000 miles. We have tested many sets that have been ran with large cams for 25k+ and have seen that the pressures were fine.

 

I am getting ready to change mine out....But checking them every 5000 miles is not an option.. ..I have a life ...to me that is way too much time involved in something that has not proven to be a problem...I see no need to monitor them that often...I'll be happy to post up the condition of the ones that are on the engine now when they are replaced..they will have close to 40,000 miles on them at that time ... it will be interesting to see what their numbers are ..

 

Guys, it's quite simple:

PRC and PP Springs are the same.

The kit however is not:
PRC uses stock locks, and Titanium retainers.
PP (golds) uses Super 7 locks, and Titanium retainers.

Both should give 25K+ miles, bu that will depend on how well they were installed (correct valvetrain geometry), as well as cam profile, and how hard you drive the car.

 

Yep, and this is LS1tech.com.