So, HPtuners was just lazy? Sounds like it wasn't too big of a deal afterall. I'll keep an eye out for your dyno, because as you guys saw from my dyno sheet in one of the other threads, my TQ curve needs some major help.

 

Woooooooooooooooo Hoooooooooooo!

 

ah crap. if you do not have a clue if the idc/msec is out of range, you have no idea that you need injectors or not.


testing the rev limit of a motor is a bad idea.

 

according to the GM build book, the stock internals on a cobalt 2.2l engine can handle up to 7500rpm without blowing..so 7k wont be a problem. i will have him up it just to see if it works, ie i will go to 6700 and stop....and then have him set mine back to 6.5k....no use to raise it for me.

 

If you don't know what the IDCs are...you could go beyond static over an RPM and some big ass misfires will cause some big ass damage.

Area is right, like almost always.

The 2.4 and 2.2 use the same injectors so I doubt the 2.2 is pushing them as hard as a 2.4 but we never know without logging it...just be careful...usually pioneers of stuff **** something up pretty nicely

 

hahaha, ya...tis true. everything has been good so far...just waiting time now lol, like i said, i will test the rev limiter to a very small level...then stop...just to see if it can be done...then all you can up it if you want...not my prob if they blow thier engine

 

My rev limiter is at 7100

I kno wit is there...but I am not running into anytime soon

 

the 2.4L has 24lb injectors if im not mistaken, and if you were to upgrade to the 32lb injectors yes you would need a harness and i was told that the harness from a 2000 2.2L cavalier will work.

 

i think it's awesome that the 2.2's have tuning now. this opens the doors up for a whole new level of fun. or headaches, which ever occurs first.

the dyno graph will show where the power falls off. no amount of tuning can fix this.

 

Not up top. But I've got problems down low too.

 

2003-2004 harness...you can find the part number if you look for it...

 

woops my mistake thanks for correcting it

 

What you'd have to look into is do the 2.2 and the 2.4 use the same harness?

If they do you'd have to buy the other harness, if not...then they are probably the same...ask a GM tech to look itup

 

ya that im not sure on. but if i had to answer i would say they use a differen't harness merely in regards to placement of the sensors

 

im on 225/45/15 hoosier a6 slicks when i throw it around, yes the unsprung weight is lighter but the overall grip is about 200% higher as well. and for daily driving i run 225/35/18's that are around 45lbs per corner that get the usual tossing into the twisties and no problems as of yet, i have cracked a rim on the inside lip from continual loading on one favorite stretch of road though, a nasty little chiccane.

 

You wont need 32lb injectors. Look at the 2.4's. They are running fine with FULL Bolt-Ons with the 24lb'ers in.

 

Okay since I haven't got an answer yet, I will ask again. Where can I signup for this? Or who can I contact?

 

but with a tune wouldnt one with a 2.4 or 2.2 see a huge gain in the addage of the 32lb injectors?

 

How are you making more power?

Adding fuel is not adding power

 

correct me if im wrong but wouldn't tuning for more fuel make more power? that makes sense to me. or am i wrong?

 

You are wrong.

You only need more fuel if more air is present to burn

 

so a larger Throttle body and the 2.4 intake manifold? aww nvm i see with even all bolt ons it meaning most air into the motor w/o F/I. so there wouldnt be a point

 

Still wouldn't need the inj.

2.4s don't need them

They have the most aggressive cams in an ecotec, 200ccs more displacement annd a bigger intake mani...

 

i think hes questioning if you can achieve the higher air to match the larger fuel pumped into the engine with a bigger mani, larger throttle body and w.e. else....without forced induction

 

And I answered it to the best of my knowledge in my last post.

The 2.4s don't run outta room why would a smaller motor?