What's needed for an 8000 rev limiter? My friend wants to port and polish his head this winter, do cam shafts and what ever it will take to reach 8k rev limiter.

So does anyone know?

 

Buy a honda, or a crotch rocket!

 

out of curiousity, why is he so for having an 8k redline? what is he looking to achieve by that?

 

And back to the question.

Everyone has been saying the ecotecs continue to pull hard past 7k. So taking it up to 8k may unleash more potential. A higher red line with an appropriate power band is crucial on an N/A car.

 

what does he feel that he can accomplish w/ an 8k limiter, that he cant w/ 7k?

 

Is heard somewere just valves and springs not sure though

 

The comments I've heard about pulling past 7k are generally referring to the 2.0 supercharged engines, not the n/a ones. That said, it should be a matter of beefing up the valvetrain to handle the extra revs, and getting a set of higher-profile cams to take advantage of it.

 

What model is your friends ecotec or car in general. I can tell you that if it's a 2.2 you can't adjust the rev limiter anyways if it's a cobalt. If it's a cavailer then the computer is tuneable.

The gains on doing a 8k Rev on an N/A ecotec car is not all that cracked up to be. Sure a few more ponies will be obtained but that's a lot of money and time for just a few more ponies.

 

why do you need an 8k redline? Just b/c S2000's and rotaries benefit from a super high redline dosen't mean that our car will too. I know Vectors tune raises the redline to 7,100, and HP Tuners can raise the redline a bit too, but anything after that is un-neccesary and pretty much a waste.

 

Ok guys. Theres something you don't know because most tuner kids don't know about camshafts. A properly ground camshaft can shift your powerband to where you want it, at 9k if you want it there. I'm not looking for opinions on why he shouldn't do it, I'm looking for what it takes to rev these cars to those RPMs.

 

Get a gas trimmer... A Echo trimmer redlines @ 8800 RPM's and idles at 1200

Lol. Sorry man. Truthfully a tune that isn't even thought about yet. & major engine work.

 

contact sinister redline from the redline forums, he has been porting the ecotec heads.

 

A tune is a tune. Tuning is nothing more then fuel and timing control. Most engines can withstand higher revs, internally wise, but the valvetrain is what holds them back.

I'll probably port the heads for him even though that has nothing to do with raising the redline.

 

You're going to need to rebuild the whole head to accomidate for the higher redline. You will also need to either delete the balance shafts or buy GM's neutral balance shafts for the bottom end. The stock bottom end shouldn't rev past 7500RPM w/ the stock balance shafts. GM tells you not to go past 7K. While you're in there, you might as well upgrade internals, but that's your choice. The stock bottom end isn't going to hold up much past 250hp, though. Just FYI.

You have yet to answer the question about which engine your friend owns. L61, LE5, LSJ...

 

Look at what freakin' forum we are in. I can't believe how stupid some people are here. Everytime I make a post, I make sure to go to 2.4L performance considering that is what he owns. Then everytime I make a post I get bombarded with people asking me which engine he owns. Maybe there should only be one forum here that say Ecotech performance instead of individual engines.

/rant

Thank you for the info on the balance shafts!

 

ive seen it on here before, i think its the springs and retainers but dont hold me to it. just do a search and you will probably find what you need... also check out the gm 300 hp buildbook, i think they did it in their build

 

If you don't know that the engine only has one head, don't bother trying to port it for him.

I politely pointed out the fact that I didn't see that. I apologize that I didn't see what forum we were in. Now, how hard would it have been to say, "2.4" the first time instead of being an absolute ass. I can't believe I even bothered to help you. If you know enough to port a freakin' head, then why the hell are you here asking questions about what should be modified to run a higher redline.

See, I can be a dick too, but it doesn't get us anywhere. Now be polite or GTFO!

 

it's also an issue how long you plan to be at that RPM. a road racer may be there half the time, while a street car, it's not as common...

in short...

cams to make it worthwhile, obviously.
valves and springs that can take it, without floating.
the balance shafts can't hurt, but i'd deal with that only if i was taking the engine to super high RPM regularly.
they do make stronger lifters and bearings and guides, while not strictly needed, i would invest in that while i had it apart.
an oil pressure gauge. keep an eye on, if the pressure drops, stop.
while you're at it, an extra oil cooler can't hurt, i may even go as far as having the oil pump blue printed and it's gears hardened. if i had the imaginary unlimited money.
a nasty header to make it actually worth the redline.
good plugs.
prolly larger injectors.
a tuner that Jesus would trust to work on St Peter's car.

 

Thank you for that answer joeworkstoohard. Just the answer I needed to start pricing parts.

Edubs, in regard to your post. I have tried the whole polite thing a few times in the past. I've said the engine then people still ask what engine. The forums are laid this for a reason. Just a shame people do not know how to use them. And your answer was not you being a dick so stop trying to be one, its not like you own an f-body. ha

 

What Engine are you talking about? 2.0, 2.2, and 2.4 all have different heads

The 2.0 only really, needs new springs and retainers.

For the 2.2 you would need to do much more

Search for the GM ecotec build books, they outline builds for every HP level, including P/N's and suppliers

 

Further an example to my point on the boards, but thank you for your advice.

 

That actually made me laugh out loud...

 

I forgot to mention he builds them up too and does a cam profile, evo stage profile. That and a few other goodies you've mentioned are what is needed.

 

In my defense. I pull most of the posts right off the front page. It's rare for me to actually go through the forums. Therefore, I seldomely know which forum I'm in...

 

Do you have an acutal link to a site? That would be greatly appreciated!!! Thank you!

And Edubs, lets just put it behind us, no sense in making useless drama.