I was wondering if you have to get your car tuned after you install a 2.4 liter mani?

 

I didnt, but im sure it would jsut help that much more.

 

how much horsepower did you get off of yours without tuning it? Roughly..

 

I dunno, i noticed an increase, when i went to the drag strip i beat every other 2.2 i raced.

 

How bad was the install?

 

The install wasn't too bad, the instructions are pretty good from CED. I got 9 peak whp out of mine.

 

Without a tune?

 

Yes. At that point when I had it installed there was no tuning available for the 2.2 outside of a piggyback.

 

nice, thanks.

Do you need torque specs?

 

i noticed a difference...about 9-11hp increase...i didn't have to tune but it would help...and if you are using the stock air plenum air box setup then buy a k&n drop in filter to go along with it....it really only takes about 45 min to install....actually you could just get the manifold, the kit on CED is pretty much pointless, you don't need the adapter plate, all you need is an extension for the brake booster line (1/2" heater hose with couplers and hose clamps) and the PCV seal....don't even need the bolts....i have an 07 though so it may be different for later models....i'll post pics later on of the install....make sure though if you have the electronic TB that if you unplug it it will throw a P0122 and a P0223 code and will have to be cleared before you can actually drive the car...

P0122 - Pedal Position/Throttle Position Sensor Circuit B Low Input
P0223 - Pedal Position/Throttle Position Sensor Circuit B High Input

Meaning they aren't reading in the ECU and the DIC will show "Engine PWR Reduced"

as far as bolt torque specs just tighten them so they hold....the holes bottom out and if you apply to much pressure they will snap in half so a good snug down should be fine for the manifold and TB...

any more questions?

 

Not to bash but. losing that much torque between 3000-5000 RPM range. is it worth it?

 

i have the 2.4manifold with the stock airbox and K&N drop in filter and the torque loss is slightly noticeable but not enough to regret buying it or want to swap back to the old manifold, i even dynoed after the manifold and its making power past 7000rpm where before it made power to about 6300rpm and start to fall off

 

I thought if you put the 2.4 intake mani on it would go in limp mode... Or is that the 2.4 TB that would make it go in limp mode without a tune?

 

The TB throws the code and that is now being tuned out so we are golden with everything.

 

With a tune, U can keep the 2.4l TB on the mani and take full advantage of the whole setup!

 

Haha sweet im gonna buy me a intake mani and the TB does trifecta do the tuning for it?

 

We really need dyno number with the 2.4TB on there.

You say it throws those codes, but what if you unplug the battery before install? How can it throw those codes if it doesn't know you removed it.

 

To the OP whats up with all the threads asking old question. Just do a search and you'll find answer for a lot of your questions.


To the 2.4TB questions. Im already working on it. Currently working out the small issues but it works! I am the pioneer!

Thats not true when I got my setup I tried doing it without the adapter plate and there was a very small leak to the very left of the throttlw body. The gasket was sticking out and would have possibly blown had i left it like that. it ould be just because I have an early 2005 model but either way it is needed.

 

i have an 07 and i have no leaks whatsoever so it could be just a slight design change or something between the year models....but i will put it on and see if it makes any difference to the car....

as for the codes....the battery being unplugged will still throw those codes...(it did for me twice)...but luckily i had my scan tool on hand it fixed the problem easily...

 

wow you guys must be doing somethin wrong mine never thru a code and i didn't seem to lose any torque. and you need to wait for the car to warm up and hit closed loop after installing the manifold so it doesn't throw a code.

 

^^Who? No one threw a code. The OP wanted to know if installing the 2.4 mani would throw a code and the discussion went to talk about something else.

So my question is what are you talking about?

 

my car threw codes indicating that the computer wasn't reading the throttle position sensor...but that was it and it was an easy fix....probably a rare fluke when i unplugged the TB when i polished the inside...maybe something reset or didn't auto calibrate right when i plugged it back in...but i just cleared the codes and it runs perfect....

pretty much you will only throw codes it you use the 2.4tb, not because it's bigger, but because the TPS is different and has different voltage values i do believe, but i could be wrong...but then again i can always go pull one off and try it....

 

NO u probably had to do a crank case relean.

i am currently tuned to use the 2.4L TB and have no codes for it.

 

no...i'm pretty sure it was my car throwing TPS codes.....

P0122
P0223

both TPS sensor circuit B codes, one for the high input and one for the low input

but like i was saying...it probably was just rare anomaly with my car to throw those codes after i took off the TB and then ported/polished it....remember this is the electric throttle body on the 07 Cobalt's...not the cable style...static discharge, bad contact, dust, or something that could have gotten into the connector. I unplugged and then plugged it back in and cleared the codes and it hasn't thrown them again....

along with the codes the DIC showed "Engine PWR Reduced".....

so....that was i trying to say....and for those to be careful so it doesn't happen to anybody else...

 

Hmm....thats wierd because those are the symptoms of having the 2.4L TB. But I pull my TB off all the time (like every oil change) and clean it very well and have never thrown any codes.