Do any of the after market stage kits, either intense or the new one with rev it up motorsports,, raise our RED LINE?

Just wondering. I find it really easy to find my current limiter.


2006 Laser Blue Met SS SC

 

not sure if it is included in the stages from ray, but I know they have the ability. they were messing around with it before. wait... maybe it was on a srt-4.

 

The RevIt Up Stg2 can but injecting fuel above the fuel cut, but unless you replaced the valve springs I wouldn't recommend doing it.

 

Your current engine rev limit is set by your valve springs. Anything faster then 6500 RPM will result in float. There is good news however. Replacing valve springs on our engines is not an expensive job. The parts are a little pricey though. Bates Engineering and Ferrea make springs for us. I would go with Ferrea, as they are dual coil design, and allow for a 8000 RPM redline. You of course then have to reset your rev limiter some how to take advantge of the higher speed.

I would let a shop do it, as they will have the tools. But if you want to try it, here ya go... You don't have to take your engine apart. You remove the valve cover and spark plugs, then the cams and roller rockers. You will need an appropriate valve spring compressor for OHV engines and a spark plug hole air hose adapter. One clylinder at a time, put shop air into the cylinder via the adapter to hold the valves in place. Remove the old springs, locks and retainers with the compressor, and replace with the new ones. The GM build book will give you all the torque specs and some good pictures for reassembly.

 

thats crazy..^^ i'd let a shop do it

 

JBP is advertising a stage 3 head with all of this done, including Ferrea parts. It is pricey but they claim 14-19% increase in power. Would this not be a good way to go especially if everything else in the 300+hp build was being done?

 

On an LSJ, I would say no. You already have the better valves from GM, so all you would really need is the springs. It would be cheaper and easier. Any by the way, JBP's markup on Ferrea parts is pretty high. Call Ferrea and ask for a retailer in your area and I gaurentee it will be cheaper. That's what I did.

On the L61, I would say maybe. Now you have to replace the valves, which means you have to remove the head. But since you have to remove the head, it might still be cheaper to just replace your factory valve train with Ferrea and then reinstall it. That would be kind of a personal preferrence call. In addition however, you probably wouldn't be trying to raise the RPM redline on an L61 unless you were also replacing the lower end rotating parts. So you just might have the whole engine out of the car.

 

yea i saw the head. Its Mucho $$$ i wanna start to upgrade internals once i have a lil more then 5K on the SS S/C but not sure on what i'm gunna be needing to up grade. Most of the reading i've done was on the 2.2 and i'm not sure what the LSJ has over the L61 on internals....

 

I think you're making too much of the so-called 6500 rpm "limit" for the stock valve springs. The LE5 uses the exact same springs and fuel cut is 6800 rpm and 7000 for the Solstice!
Source:http://media.gm.com/us/powertrain/en...E5)%20rev2.pdf
Yes, the build book recommends they be upgraded even on a street/strip application, but they're not going to float (at least at stock valve lifts) at 6600 or anything.
JMO
WOT

 

Your right, my bad. I forgot to say that faster then 6500 AND with upgraded / higher lift cams. I didn't think about it because if you go with higher lift cams, thats another reason to have to replace the springs to start with.

Actually, with the LSJ specifically, what effect if any do you think the forced induction has? Could the pressure in the induction also contribute to some float at higher RPMs?

 

Totally agree, once you start adding more lift, all bets are off.
As far as my own experience, negligable, as if anything rising cylinder pressures would be, for the most part assisting the springs in CLOSING the valves. But the design characteristics of the chamber might have some affect on how pressures equalize around the head of the valve and in the pocket. So how much could 20lbs of additional cylinder pressure due to boost really make? I guess it might become a consideration at sick levels of boost with unstreetable overlaps.Hmmm
Thanks for the brain teaser...I'll look for a paper.
Regards
WopOnTour

 

I have a 2008 chevy cobalt lt with the 2.2 and I'm just curious if it's safe to raise the Rev limiter to 7 grand without doing anything engine work

 

injecting fuel above the fuel cut, but unless you replaced the valve springs I wouldn't recommend doing it.