would a draw through custom tune like the hahn tune work on a draw through setup like my turbo setup? ive been talking to a tuner and he said it wouldnt really make a big difference

 

What do you mean a draw through setup?

 

Maf?

 

Ohh I see what you are saying. Well I dont necessairly agree with that. If you go with the blow through well then your MAF sensor is going to see some PSI on it. I know that it only measures flow, but I have got to think that running air past any sensor in any type of pressure vessel would change the flow charageristics. On the flip side, in a vacuum (pull through setup) everything will expand. I dont know just my .02.

 

anyone else know?

 

If you have a blowthru setup then a drawthru type tune will not be the same at all. The maf curve will look totally different. Also it will go stupid rich if the BOV is after the maf.

 

I think draw through might be the only way that our maf will understand whats happening. We have a heater element, so with a blow through it might keep the element even hotter causing it to think the air is actually thinner when in turn the air is just quite dense and hot because it was just compressed.

Plus you won't be able to log IAT1 going into your system if you have a blow through MAF setup. Our MAP sensor is what needs to be after the turbo so our car can register the boost and IAT2

 

The maf works just fine, I have blowthru and so do most of the other turbo cobalts. Even the hahn maf afaik is blowthru because it's after the turbo, not before. It cool to see the IAT1 compared to the IAT2 on blowtru because you can see how much of a temp drop there it.

Going turbo blowtru is the only way to go. period.

 

blow through is the way to go, never could get the car to run correctly in draw through setup. Plus if you run draw through you need to run a re-circ valve, and a full hardpipe intake piping to the turbo. and it'll be a very peaky output.
If your tuner said they're wouldn't be a big difference, he was wrong, my maf tables are completely different than a draw through. Plus this MAf doesnt' "see" boost and actually has been flawless up to 22.5 psi so far.

 

so basically the tunes would be way off? the hahn setup is a draw through isnt it(2.4's)?

a better question to ask would be would a draw through tune get and blow through setup running safely, with just some tweeking required?

 

The tuning part is really no issue, well I don't know about the 2.4l though but on the 2.0l tuning is easy.

 

i know the utning wouldnt be too hard, but im wondering if a custom tune for the hahn (draw through) setup would work on my custom turbo setup which is a blow through setup

 

x2

 

anyone know?

 

bump

 

Mine is a draw through systme and uses the MAF exclusivly to calcualte fuel needs.

The MAF is located just after the air filter.

I dont see any reason why the tune would vary to much IMO.

 

how is it setup? filter-maf-turbo-ic-tb?

 

The tune should be a good starting point for you if you can find a drawthru tune. You will have to tweak it no matter what though.

 

any tune would need some tweaking as no cars react the same. especially on a maf only tune.
I run my car maf only from 2k rpm up and so far not a single problem since you can now disable dynamic airflow.
but a drawthrough tune and a blow through tune are gonna be quite a bit off from each other and to properly set up a draw through, you must use a recirc valve and have it plumb back into the intake pipeing before the maf (btwn maf and intake) or else the car is going to dump fuel like crazy btwn shifts.

 

i understand what you guys are saying. i know there will be issues with it,and i plan to fix them. im just mostly concerned on wether or not the draw through will get the car running and be safe at the same time

 

bump