Rocker Arms for LS4
Thread Starter
Teching In
Joined: Dec 2005
Posts: 5
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Rocker Arms for LS4 Hello. I have seen on www.drivewire.com a set of crane rocker arms advertised to fit the 2005 Grand Prix GXP. It is at this address http://performance.drivewire.com/get...e%20Components. I checked Crane's website and this part number is showing that it is for the 1997-2004, LS1, 5.7L and Vortec 4800, 5300, 6000 engines. Would these rockers fit the LS4? Could anyone shed some light on this? Thanks.
Yes they fit, what size are 1.7's, 1.8's or 1.85 (This will give you more lift and is a good time to change the springs, ls6 springs worked well for me. I had the kit here at the shop for a LS1 1.80 rr, pushrods, studs, g plates) I do not have any DOD problems. I also did not fell any more HP for this mod I will be going to the dyno soon.. My kit was the $700
Staging Lane
Joined: Dec 2005
Posts: 62
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From: S.E. Michigan
Originally Posted by Dales396lt4
Yes they fit, what size are 1.7's, 1.8's or 1.85 (This will give you more lift and is a good time to change the springs, ls6 springs worked well for me. I had the kit here at the shop for a LS1 1.80 rr, pushrods, studs, g plates) I do not have any DOD problems. I also did not fell any more HP for this mod I will be going to the dyno soon.. My kit was the $700
Very interested in what's happening. When are you going to the dyno??
Yes it is my 06 Impala SS, I made a cold air kit for it and a 75 shot of NOS (Dry) I had the RR kit and said what the hell as for the power 10 to 15 is hard to feel.. TQ steer is so bad I have to drive like i am 80yrs old.. So far so good... PS the pushrods 7.385.. I just wont to get it tuned SO BAD..
vinci is in the middle of installing the 1.8 accelerated lift rockers with the dual springs as i type. it's on a 2006 impala SS. they have already baseline dyno'ed the car as well. once they are done, i'll see if i can prod them into getting the info up on their website.
Thread Starter
Teching In
Joined: Dec 2005
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Originally Posted by mrr23
vinci is in the middle of installing the 1.8 accelerated lift rockers with the dual springs as i type. it's on a 2006 impala SS. they have already baseline dyno'ed the car as well. once they are done, i'll see if i can prod them into getting the info up on their website.
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Staging Lane
Joined: Dec 2005
Posts: 62
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From: S.E. Michigan
Originally Posted by mrr23
vinci is in the middle of installing the 1.8 accelerated lift rockers with the dual springs as i type. it's on a 2006 impala SS. they have already baseline dyno'ed the car as well. once they are done, i'll see if i can prod them into getting the info up on their website.
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11 Second Club
Joined: Nov 2005
Posts: 606
Likes: 1
From: NY
Originally Posted by LightFighter
you guys need to get a PCM that is tuned if you want to feel anymore power.......the torque mgmt is shutting down any gains from the mods you installed
I would assume the LS4 is similar to the LS2, in that any gains the computer senses (air/Fuel out of the "normal" range) the engine's timing is polled, and in the end it's as slow or slower than stock.. need a tune on these things, same with less backpressure I hear as well.
Originally Posted by LightFighter
and another thing is that Crane Kit sucks.......... 700 bucks for what those shitty *** rockers?
That kit is not LS4 specific it is the same kit for all the LSx's
That kit is not LS4 specific it is the same kit for all the LSx's
and who said they were LS4 specific?
Last edited by mrr23; Mar 15, 2006 at 02:28 PM.
finally got around to putting the results up on the web
http://www.vincihighperformance.com/IMPALASSPARENT.HTML
VHP 1.8 ROCKER & SPRING INSTALL
GAINS OF 18.1 rwhp & 16ft lbs tq
http://www.vincihighperformance.com/IMPALASSPARENT.HTML
VHP 1.8 ROCKER & SPRING INSTALL
GAINS OF 18.1 rwhp & 16ft lbs tq
TECH Fanatic
Joined: Jul 2006
Posts: 1,732
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From: K.C.
hmmm. i guess im used to my tap shift where i can lock it in third gear, but it still won't let it go wot under 2700 no matter what gear im in on the dyno.
all my charts are from 3k-5800 in third
dunno
that might explain the higher numbers then normal for stock
all my charts are from 3k-5800 in third
dunno
that might explain the higher numbers then normal for stock
Staging Lane
Joined: Jul 2006
Posts: 67
Likes: 0
From: p-town, Il
Does anybody know if the stock springs will work with the 1.8 rocker arms? I know aftermarket springs are usually better than stockers for controlling valve float, etc. but I wondered if the stock springs will bind with the added lift.