John B

iTrader: (10)

Since I don't want to machine my heads to fit traditional dual valve spings for a cam with over 0.600" lift what is available (REV, Crane, etc.) and what would you recommend?

LS1 Power Plant

iTrader: (7)

I've been using the new Crane dual springs for two weeks now. I believe they are good for 0.650" lift, but don't quote me on that. So far so good!

robertbartsch

rev doubles do not require machining ....
i've used them for seveal months with no issues....

see thunder racing ------>

Jason99T/A

iTrader: (21)

For a cam with over .600 lift, I would look into the Crane Doubles.

jrp

iTrader: (16)

REV duals of Crane doubles. i believe those are your only two choices without machining.

boos2

Which is better? Who has the Crane dbls? The only doubles I had heard of were the Revs (that didn't require machining). Thanks

Thunder Racing's website says the Revs can be used with stock spring pocket, it doesn't say anything like that about the Cranes. Does anyone has some documentation that says you don't have to machine anything. I want to ditch my single springs but I don't want to have yank the heads to have them machined. Thanks

LS1 Power Plant

iTrader: (7)

The new Crane duals are a direct replacement, no modification to the head is needed. I would use the Crane hardened spring seats though.

boos2

Are these the same ones the Thunder List on their site? Thanks

LS1 Power Plant

iTrader: (7)

Yup

95LS1TA

iTrader: (1)

Crane duals #144832-16

seat preasure = 112lbs@1.8
open preasure = 352lbs@1.150

The seat preasure is lower than the 918's. Would that cause any problems?

Paul F

iTrader: (2)

Set them up at 1.780 and that will give you about 130lbs. on the seat and about 365 open.

95LS1TA

iTrader: (1)

Paul, how do these compare to the 918's, revs, etc? Thanks.

mrr23

iTrader: (3)

http://vincihighperformance.com/NEW%...TS%20PAGE.HTML

here's the newest vinci/crane springs

DUAL VALVE SPRING KIT
PERFECT FOR SHAFT MOUNTS OR EXTREME APPLICATIONS

160 lbs @ 1.750
400 lbs @ 1.150
will handle .650 lift with ample coil clearance

NATURAL FREQUENCY MUCH HIGHER THAN OTHER SPRINGS. HARMONICS DON'T EVEN COME INTO PLAY UNTIL AFTER 7200 RPM

EACH SPRING IS MAGNAFLUXED BEFORE PACKAGING

COMPLETE WITH TITANIUM RETAINERS & ID SPRING LOCATORS ( NOT NECESSARY TO MACHINE HEADS)

slt200mph

iTrader: (42)

Geeeeze.. ...This thread is very very old..it came back from the dead .. PRC duals and Patriot gold duals are good and require no machine work..I put 43000 miles on a set of TSP's PRC platinum dual springs with a cam with .595 lift without any problems..

Both PRC and Patriot now have dual springs that will handle .650 lift..

mrr23

iTrader: (3)

ah, didn't check the date. gotta remember to look at those things. seems the search is stopping in the 2003 year.

MPHmotorsports

iTrader: (18)

Search has been messed up for some time. Its almost worthless unless your looking for old info.

mrr23

iTrader: (3)

yep, yet you'll get all of those 'do a search' ***** on your case, if you ask a question.

JPH

iTrader: (2)

crane #144832 or #144833 all day long here.