MAFT draw thru vs blow thru. Help me decide.

[vr3.9]

I recently dynod at the TX2K10 and got 471awhp missing the13T record by 1. :(
My injectors maxed out and so turning up boost only made it worse. So I'm going to turn up the fuel pressure to insure I can break the record. However, I'm considering going blow thru as well.

So advantages and disadvantages of both systems.

I know draw through is affected by boost leaks and my intake pipe could come off and I could have serious problems. (it's happened)

Blow thru will clean up the engine bay some.

Is it worth going blow thru?

[whitedevilstealth]

Go blow thru I did with my 19T's and they start spooling around 2100 rpm

[green-lantern]

Nice HP Mike, I say go blow through. I'll be doing it after NG and I don't want to compete against you with that HP on stock mas. lol

[MADMarc]

Excuse my ignorance here but what is required to make a blow thru setup as reliable as having a maf? For tuning purposes I mean. Do you need to have at absolute least a piggyback that you'd have to punch in specs for specific airflows? I really have no idea how they work w/o a maf lol, sorry to slightly thread jack.

[Frostedbutts]

Blow thru

All gains and losses aside, you hear your turbos like F-18s, bro.

http://hometestingblog.testcountry.com/wp-content/uploads/2011/01/Charlie-Sheen.jpg

And that's awesome.

[vr3.9]

Excuse my ignorance here but what is required to make a blow thru setup as reliable as having a maf? For tuning purposes I mean. Do you need to have at absolute least a piggyback that you'd have to punch in specs for specific airflows? I really have no idea how they work w/o a maf lol, sorry to slightly thread jack.

The simplest way is probably like I have. MAFT for base correction (converts the MAF signal into something the ecu can relate to and makes adjustments for larger injectors) Then I use an SAFC to tune with. The only driveability difference I've noticed over stock maf is that the car doesn't want you to give it much gas before it warms up, it wants to fall on it's face. Once it's warm it's just like normal only more power. I don't know if everyone experiences the cold engine issue or not.

[vr3.9]

Nice HP Mike, I say go blow through. I'll be doing it after NG and I don't want to compete against you with that HP on stock mas. lol

I think I can get over 500 our of her. That was on my first pull and I don't think my rough, no log, scanmaster, street tune could have left me with no room for improvement. I have an hour free dyno time and just want to have everything as good as possible before I use it.

[green-lantern]

I think I can get over 500 our of her. That was on my first pull and I don't think my rough, no log, scanmaster, street tune could have left me with no room for improvement. I have an hour free dyno time and just want to have everything as good as possible before I use it.

I was a bit surprised you didn't have a blow through last year but yeah I'd do it. I sold my stuff because I was going to go AEM (speed density) but now I plan on going blow through again.

[Intropy]

Dang man, those are some good numbers. I like blow-through for MAF-based stuff but I'm not sure I'd mess with that setup.

[green-lantern]

Dang man, those are some good numbers. I like blow-through for MAF-based stuff but I'm not sure I'd mess with that setup.

this is true, if it isn't broke don't fix it.

[vr3.9]

Do people usually get gains from going from draw thru to blow through. I'm not so much worried about them spooling quicker. As far as I can tell 13T's spool quicker than 9bs and if your running E85 well lets just say you never have to wait. Here's the dyno. First run was pretty lean 12.8 and a little higher. I added more fuel and more boost and well it just kept going leaner since the injectors where giving it all they had. You could see it trying though even did a back flip on the second pull.

http://i225.photobucket.com/albums/dd64/reachmercer/dynotx2k11.jpg

[whitedevilstealth]

I have the same set up as you except for the 780's and I have 19t's. I am also gonna tune with the translator and safc2. Did you have any issues with this set up? Getting mine tuned in 2 weeks. I'm hoping for around 500awhp with mine. I might not cuz I only have 550's and no e85 and only am gonna run 18psi.

[vr3.9]

I have the same set up as you except for the 780's and I have 19t's. I am also gonna tune with the translator and safc2. Did you have any issues with this set up? Getting mine tuned in 2 weeks. I'm hoping for around 500awhp with mine. I might not cuz I only have 550's and no e85 and only am gonna run 18psi.

Setting up the MAFT is really a piece of cake once you have the correct instructions. The 1st and 2nd version setup completely different and things aren't that clear. You probably have the second version and the instrcutions are in a word doc by turbobob the pdf is for version 1. Don't worry about hooking up the white or purple wire since you have SAFC. I did have to fiddle with it a bit, but I'm not sure why.

[whitedevilstealth]

I have it all set up, just waiting for the 16th so I can get my tune.

[YoshiBishi]

I went blow thru and I like it a lot. The biggest advantage is probably not worrying about pipes blowing off and your car not running. One VR4 I test drove not only had a BOV that VTA with the stock setup, but a pipe blew off during the test drive and we sat on the side of the highway for an hour waiting for a tow truck...

However, I typically don't upgrade parts unless something is broken or insufficient. I'm only attempting to max out at ~450awhp. If your car runs fine now, I would just leave it be =). I've noticed every time I changed something, it would cause problems with something else.

[MADMarc]

The simplest way is probably like I have. MAFT for base correction (converts the MAF signal into something the ecu can relate to and makes adjustments for larger injectors) Then I use an SAFC to tune with. The only driveability difference I've noticed over stock maf is that the car doesn't want you to give it much gas before it warms up, it wants to fall on it's face. Once it's warm it's just like normal only more power. I don't know if everyone experiences the cold engine issue or not.

Thanks for the response. Would you have to change any of your tuning electronics if you switched to a blow through or could you still rock the maft and safc?

[whitedevilstealth]

i guess lots of guys are running maf translators with an safc

[vr3.9]

Thanks for the response. Would you have to change any of your tuning electronics if you switched to a blow through or could you still rock the maft and safc?

No just my intake pipes/filter and cut the charge pipe and use silicon coupler to install the MAF. Anyone who's done this and want to share exprience would be good. What's the best placement etc.

[Chris@Rvengeperformance]

Going to no maf made my car MUCH more responsive at no boost and boost under 6 PSI. It runs so much better cruising on the interstate, it is a blast to drive.

3000-6500RPM timed pulls show I'm making as much or more power at 10-12 PSI as I was at 15 last year.

The only negative so far is sometimes the idle will try to wander, I have an idle cell or 2 to fix, but haven't got it perfect.

[vr3.9]

Forrest are you running blow thru? If so post up some pics of where and how you have the MAF mounted. Also the Bilstein shocks you've got in your sig would you recommend them. I need to replace my rear struts and can't decide on OEM ECS or Bilstein. I've heard the Bilsteins wear out pretty fast with lowering springs and I've got Ground controls. Hey it's my thread I can hijack it if I want.....

[Chris@Rvengeperformance]

I'm not running any maf at all:

http://www.chrisbehnken.com/Images/photos/Tune/no_mafBW1a_92OW.JPG (have some detailing to do!)

but I would assume the benefits would be similar.

Love the bilstein, ride is comfortable, but controlled. The reason they get a bad rap is because the fronts have internal bumpstops that must be trimmed, the rears do not.

[whitedevilstealth]

Is that part of the stock maf I see. What kind of set up is that?

[Chris@Rvengeperformance]

Is that part of the stock maf I see. What kind of set up is that?

just using it for baro and iat. It'll be hidden when I clean things up. It is an emanage ultimate speed density setup.

[whitedevilstealth]

Figured it was speed density. cool idea though