I know my Manley's are only rated for .600 of a lift and was wondering with all these newer and bigger cams, what valve springs are being used for stock heads that allow up to the higher lift. Thanks.

 

Crane duals, patriot duals and the comp cams 921's. IIRC these are all good to 650 lift

 

What he said.

 

i'm using comp 921's with the g5x2 cam.

 

In order of Pricing.

Patriots
Cranes
Comps

 

Which of those can you use on stock heads without having to do anything to the heads so that they will work? Out of the 3, which one is the best?

HumpinSS: What does IIRC mean?

 

But more $$ does not mean a better spring!!

I think the PP Golds are about the best out right now.

 

the trex cam that i have pushes the springs hard and the best i have see so far are is the cranes, they are cheaper than comps and perform better.

 

iskeys are without a dout far better than any stock sized dual spring.we have ran them for 4 years without one failure.I have them on my 658 lift daily driver.

 

If I remember correctly

 

What about the REV dual springs? I am using them on my G5X2 and no problems yet. I think they are the springs Lou recommends with that cam. Is there a reason they weren't mentioned? I have heard some bad things about them but I think it was just the first batch or something. I got a good deal on them so I bought them, they weren't my first choice though. I wanted the Patriots but they were on hold for the seats. Anyone else using Revs?

Well, I broke a spring yesterday...about 3K on the springs with about 15 track passes. A replacement will be here today but I am definitely changing brands when I have the money.
Matt

 

rev dont make as good of a quality springs as the rest of them. most people know to stay away from them. they have alot of stories where these have failed.

 

So crane and isky duals make up the general consensus for the best high lift springs out there?

 

im running the patriot duals on my um patriot heads

 

We have not tried the Comp 921's yet, but we've run both the Crane and Patriot dual valve springs with no problems whatsoever. The Patriot valve spring package is hard to beat for $295 considering it comes with the dual valve springs, titanium retainers, hardened spring seats, Viton valve seals, and Super 7 locks. We sell the Patriot kit the most with our camshaft packages.

Trevor
Texas Speed & Performance

 

any special machining needed to install that $300 patriot package?

thanks
Louie Panayi

 

VHP dual spring kit is what i use on mine. along with their 1.89 accelerated lift rocker kit. http://www.vincihighperformance.com/superwebdeals.HTML

 

The patriot springs will fit the factory valve spring pocket.

 

Ok so far here is the list:

Crane
Patriot
Comp
Iskys
Rev
VHP

Of those above, which ones do NOT require any modifications to the heads? Im currently running a 224/.581 112 cam with the Manley valvetrain kit and I believe the springs are rated only to a .600" lift. Im looking for a quality, durable, reliable, etc. spring that I can use on my completely stock LS1 heads. Which of those would be for me? Thanks.

 

I'd go Patriot Gold.... best package price...