so i am getting a tune don here within the next weeks...... i want to raise the red line to 7100. i will be upgrading my injectors to 34lb'ers. what is everones take on this. 2.4 auto

 

you need to upgrade your valvetrain before just uppin the rev limiter. things start to break after they start to rev higher and havein be upgraded accordingly.

 

not to thread jack, I know i'm a 2.0 and all, but in order to raise the readline what kinda stuff in the valvetrain would need replaced (i'm sure the OP would like to know as well)

 

upgrade to titanium valve spring retainers the valve springs them selves and since your gonna do all that to raise the limiter you might as well upgrade the cams to somethin a lil more aggressive and to make use of the higher rev limiter. btw i have a 2.2 but i was just givin some input on the matter.

 

well, since the lsj comes w/ a 6500 redline factory and stage 2 bumps it to 7k w/o upgrading valvetrain....I'm sure you'd be alright. I think I've heard of the 2.4 guys bumping up to 7k,

Now Gobalt...what do you want to raise the limit up to?

 

valves, springs, rocker arms, lifters

 

on the 2.0's the valves can handle about 7200, i think valves float at 7400. I had my redline set at 7200 so I can hit 7K without bouncing off the limiter

 

I don't believe there's anything to be gained by raising the rev limiter. It's been brought up before, the stock or mostly stock 2.4L isnt going to make any more power past stock redline, you just increase the risk of damaging your valvetrain.

 

im not sayin its a must to upgrade but its just a good idea. jmo

 

I have my redline bumped up to 7200, been like that for a year now. No adverse affects but there is nothing to be gained reving that high. I just have it there so I dont bounce off the rev limiter.

 

yeah and extra 600-700 rpm isnt gonna help you out any unless you have cams that make power in that range.

 

well I'm gunna be getting a tune hopefully next month, where they might want to raise the limiter, or if it was safe I would have them do that. If I could do it safely I'd raise it to 9000, but since that is just obviously out of the question i'm prolly gunna have the redline bumped up to 7100

 

7100 in an sc would still be safe. like said before one of the stage kits bumps it up that high anyways.

 

exactly. i dont know about the others, but the 2.2's powerband starts falling off at about 5800 rpms...

 

I just dynoed my balt for the first time at Jannetty in Waterbury, CT. I have HP Tuners and bumped my redline to 6900 (to be safe) before going. They ran two passes to 6400 ~ish cause they were unaware of my modification, and didn't want to bounce off the rev limiter. Once I told them to bring it to 6900, I was making 231whp... and it was still climbing! The HP "curve" is very linear from what I can tell... it just keeps gaining.

I wish I had a scanner to show you the sheet.

6500 was 223hp
6750 made 231hp and continued to redline.

 

i think the 2.4 can handle it but your not gonna gain from it and its just somethin to be safe with by upgradin the valvetrain. and like i said before just go ahead and get a set of cams that will actually make bumpin the rev up worth it. bumpin up a 2.2 with out camin it and upgradin all the reast of the valvetrain is just competely useless and bad for the valvetrain.

 

Nothing, not if you're raising it to 7k anyway.

 

you can bump em up, its fine...no need to upgrade ur valves and cams yet..

the Le5 already has a agressive cam setup, really is not needed to be upgraded

 

They have the most aggressive cams out of the ecos.

Not aggressive by all means, from what I have read, the springs will float after 7100 RPMs.

Mine is set at 7100 and I shift at 7000

 

its still agressive cam setup, you wont see huge gains from cams like u see in the LSJ or 2.2

 

Messing around with fuel trims and what not can make your powerband higher........which could possibly need a slightly higher rev-limiter so you can shift higher.

 

I have no dyno but iam vector tuned and the limit is set to 7100 ish and she pulls the hardest from 6200-7000k and doesnt stop till redline ...........its been that way for almost a year and not a single problem .....most people are very timid about reving the 2.4l cause its got such a long stroke but as long as you stay under 7100k on the stock setup you will be just fine.

 

Yep, no real gain, probably a loss. Your max horsepower usually is at 5500rpm, you just lose power after that.

 

I make power till about 6500 then it starts to drop

 

On a 2.4L with a stock tuned ECU there would be no point in raising the limiter........but if it's tuned, it could be possible that extra couple hundred RPM could be put to use. Not guaranteed, but possible.

Peak HP on a stock 2.4L is actually around 6200 rpm.