padlock

iTrader: (9)

thats really wierd.. it shouldnt be starting up even lol.. but hey if it works it works i guess

ill be tuning right away so it wont matter to me

cleanxfe

the 08 2.4l have the same wiring as 09 2.2l thats why his car still runs

drumrush

iTrader: (8)

the same wiring has nothing to do with it, its the size difference that should make your car run like ****

padlock

iTrader: (9)

^bingo

drumrush

iTrader: (8)

sure, your MAF sensor will pick up the extra air rushing in, but your ecu hasnt been told that the throttle position should be changed due to the size difference, which means with no tune, you should either enter limp mode or run like ****.
thats why we're surprised that your running fine without a tune

cleanxfe

lol it has everything to do with the wiring and the sensors! if the sensors and wiring are the same then the pcm sees nothing wrong, theres no sensor for tb size, its like putting an intake on it its allowing more air in

drumrush

iTrader: (8)

no dude.

padlock

iTrader: (9)

u really have no idea what your talking about do you..


there are 2 different types of 2.4 TBs. one is a 6 pin another is an 8 pin.. both need tunes "supposedly" in order to run on a 2.2. a 2.2 "should" need a tune to compensate for this size increase in TB.... makes no sense how this car is running its as simple as that..

drumrush

iTrader: (8)

well it makes sense that its running, but not that its running well. he probably feels more power from running lean. if i felt like risking my engine i would throw my 2.4 tb on before my tune and watch my wideband to prove my point, but i dont feel like ******* up my engine

nhanson

iTrader: (1)

TB you dont need a tune for going from a 2.2 to 2.4...its the intake manifold that you do

if you went from a 2.2 to LSJ then you need a tune

cleanxfe

LOLOL all the sensors are the same between the two and the throttle position doesn't change still has the same amout of travel between open and closed and the throttle position is determind by how far the pedal is pushed through pulse width modulation

drumrush

iTrader: (8)

uh you got that mixed up there. why would crate engine depot sell a 2.4 manifold kit clearly stating that you do not need a tune if that was the case?

drumrush

iTrader: (8)

no no no. theres more air flow at the same throttle position with the 2.4 tb, which means lean.

cleanxfe

no no you have no idea ok call up gm and tell them that there service information that there engineers designed are wrong in the information that they use!!!!!!!!

drumrush

iTrader: (8)

where are you getting your information?

cleanxfe

[QUOTE=drumrush;6054018]no no no. theres more air flow at the same throttle position with the 2.4 tb, which means lean.[/QUOTE

LOL an air intake does the same thing more air

from GM where you getting yours

nhanson

iTrader: (1)

i looked and didnt see that stated.

TB = no tune (i would still eventually tune for it tho)

Intake mani = tune

padlock

iTrader: (9)

http://www.crateenginedepot.com/pdfs/2.4IMI.pdf

drumrush

iTrader: (8)

a throttle body is nothing like an intake.

Mr.N00bLaR

iTrader: (7)

I don't know much about the LAP but for the l61 (lol?) you do not need a tune for the IM, I am untuned running it right now. I DO NEED a tune if I want to use the 2.4L TB that's on my desk in front of me, my car will not run correctly if I do not get it tuned. The wiring does not change for me either, I have an 8 pin TB stock and AFAIK (what I'm told, I haven't done it yet) the 2.4L 8 pin will plug directly in and work as it should without any repins. I would imagine this is all the same for the LAP but maybe not?

C_A_D88

I'm running a 2.4 intake manifold with zzp longtube header gmpp cat back injen intake stock tb and stock tune, car runs great. (07 2.2)
U do not need a tune for the intake manifold

2.4 intake mani without a tune takes away your low end torque and moves it up the power band...

Just saying

09LAP

score^^^

drumrush

iTrader: (8)

no, not a score. but i think im done here, nobody seems to understand the point im getting at. an intake will allow more air to enter, yeah. but a larger throttle body needs to be at a different position than the 2.2 to let in the same amount of air. you can get tuned for that. for example (im making up these numbers, but hopefully youll get the idea). lets say that the 2.4 tb is 10 % larger. when at 50% throttle, the 2.4 tb will let in 10% more air because of the larger diameter. therefore throwing off your a/f ratio because the ecu isnt tuned for the difference in diameter. an intake lets more air in, yeah. but the throttle body actually CONTROLS the amount of air that the intake sucks in. comprende?

padlock

iTrader: (9)

qfmft!!

if you still cant believe that then google search 2.4 TB/IM swaps and see what results you come up with..

drumrush

iTrader: (8)

for the record, your supporting my argument there, right?