IF you are using the MAF at all or for IAT. If you are running AEM EMS, Hydra or Pro EFI, it can be opted to not be used at all.

 

Also Brett, they could have used whatever sized pipe they wanted there had they gone pull through. The MAF being blow through sort of dictated that for them more than anything.

 

True but when running the oem MAS and IAT with piggybacks, it's still something to consider when deciding between the two options.

I suppose if you have a stock MAF signal baseline and re-tune the MAF signal to compensate for the larger pipe, you could use any size pipe. Doesn't your S1 kit use a 2.5" intake pipe? Why not 3" and re-tune the MAF map in the FIC? Are we talking about the same pipe? I meant the turbo intake pipe.

 

MAF on a pull thru type = having a heart attack thinking you blew your motor only to find out it's an intercooler pipe. Cause your car comes to a gasping halt and sputters to death as you creep at no more than 30mph. Imagine being on the interstate and no tools and you blow a pipe, Ha...limping home on the shoulder isn't fun...


Blow thru = easier on the tune, huge intake on the turbo or no intake at all if you want, and if you blow an intercooler piping. Blow a pipe and you don't have to hold up traffic trying to get to a safe location.

 

Yeah sounds like you are talking about two different pipes. And it makes no sense to use "whatever size piping" to feed into a what 2 inch TB...

Who has a 4 inch Charge piping going to their TB?

Who has a 4 inch intake on the turbo with a MAF attached to that? No body, cause I imagine it would be nothing but problem-matic.

Blow-Thru > Pull-Thru for the most simplistic of reasons.

 

Obviously 4" is too large for a TC MAS. I guess I should have been more specific. I actually meant up to 3".

Just curious but what is the most simplistic of reasons that makes blow-thru superior to draw-thru? More accurate air density for the ECU's Bernoulli equation and/or something else?

 

Some simple reasons I can also think of would be that it's closer to the TB which is optimal, as the factory location is not that far away from the TB either with the stock intake. Tuning from my understanding is more efficient as well. I don't think Metered air is Metered air when comparing the two. When I had the draw-thru setup, blipping the throttle would dang near stall the car out. You blip it and let off, the A/F would dip into the 10's and have to climb it's way up struggling a little (could be the tune, but I'm pretty sure it still isn't as efficient due to the placement of the MAF). This is why a lot of the draw-thru setups recirculate the BOV, and or run the HKS/Snapse as those are the only somewhat hassle free ways it is done when you have the MAF on the intake of the turbo like most. Don't get that with a blow-thru. Idles and revs so much smoother and easier and don't matter when it comes to the BOV VTA.

Not super knowledge on this, but that's what I gather from the understanding of the setups reading the Corky Bell book and having both setups before.

 

^^ Sounds good to me. I do agree that blow-thru > draw-thru although I think draw-thru can work very well with a recirculated BOV and no leaks. I'd prefer to have a blow-thru setup myself but my XB needs a 3" MAS pipe and that would create other problems.

 

^That's from the No management right?

 

Pipe blow off can occur regardless of MAF blow through and are not more prone one way or the other......Regardless it sucks either way.

I have tuned and done both setups, and personally I don't care either way. Pull through, blow through....I can tune either and make it run well both ways. So long as the turbo is right sized, makes good power and the boost control is crisp, that's all that makes my world go around. All else (for the most part) is fluff.

 

Sort of. If I had the right management I could do a 2.5" blow-thru and re-tune the MAF signal to match the 3" oem. A 3" pipe between my IC and TB would be too big.

 

Ummm...no one said anything about Blow-thru being "blown intercooler pipe resistant". That wasn't what my post was about. It was about what happens in the Event that you blow a pipe with either setup. One acts like the car blew up, the other does not.

 

I opted for the draw Thru for my set up on my kit still piecing together my turbo kit but manged to make a nice pipe to connect to the turbo using my old cold air intake and some silicone it even works as a short ram for now (when i am not boosted)

I am glad Mr Dezod can tune both setups i cuz i live near by to his establishment and will be needing a tune once i get an AEM FIC and decent turbo

 

If you do have a blow through setup and do blow a coupler or lose a t-clamp you should pull over anyway. Running your turbo without compressor load can really mess your investment up.

I have always tried to talk myself into going with a low cost solution and everytime I pay for it in the end. Quality piping with proper design is an integral part of your system. I would stick with a reputable design, besides AEM FIC clamps out the MAF anyway. If you really want perfect drivability then you need something that uses the MAF. I would argue more on the position of my MAF if I actually used it as designed. (Don't think I'm saying you don't need it, your car won't run right without it.) Blow throw setup will throw air chops in if you position it wrong.

However, the AEM fic has a built in MAP sensor which I'm sure you will use for tuning. I would say go big and never lower; a standalone is pricey but in the end worth it. I have always ended up buying a standalone on everycar I have modded. I should have learned my lesson with my Scion but history is doomed to repeat itself.

No bags, no frills, your money, your car in the end. Good Luck.