cam

iTrader: (9)

Crazy lobes run the duals. Mild lobes run the singles. FWIW I dyoed 8whp more with 918's on a TR224 then I did a few days later with Patriot Golds. Mind you I cant say one single bad thing about the Golds they took 7000RPM on the regular although they did soften up after season 3 but no failures at all. Im running EPS lobes in the new engine/cam and retaining VVT so worried about overloading the phaser and running the 1518's

Also now have 1518's in the TR224 car and its running great on season two with those now

ducatisl

iTrader: (1)

918's with Ti retainers on XFI lobed cam of 0.610/0.608 lift. Shift at 6500-6700 rpm, when thoroughly good and hot. Oh, and yes, daily driver.

Randy WS6

iTrader: (69)

I run these spring in my LS2-418, and will be using them on my LS3-431, Very good spring and been running them for over 2 years now and shift at 7400 rpm and no valve flote, My cam is a 257/266-.684/.658-114



Livernois Motorsports LS-Series Dual Valve Springs

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Click to enlarge

Product Description

For vehicles with large camshafts, Livernois Motorsports recommends our dual valve spring, which is capable of .690 lift!
Specifications:
Install Height: 1.820
Max. Valve Spring Lift: .690
Spring Pressure Closed: 150lbs
Spring Pressure Open: 382@.620 / 410@.680
Coil Bind: 1.100
Complete spring kit available

LivernoisMotorsports

iTrader: (1)

Thanks for posting!

In all of the years we've been using these springs, we've never had or heard of a single failure. We have even tested springs that came out of cars after as much as 60,000 miles with full bolt-on's and a large camshaft and they were still within spec.

-Rick

mercccc

This is the kind of info that makes me want to get the 1521's. This is the second person i have heard actually test them and be within a few pounds of new.