Anyone running a MAFless tune? Unitronic perhaps?

[abzoni]

So I'm picking up my Turbosmart hybrid BOV tomorrow after much advice from ignus99 I was wondering if anyone was running a MAFless tune with a BT setup, if MAFless is smooth then I'm reflashing to the MAFless tune and going full BOV but if it's not I'll just stick to hybrid. Any input is appreciated!

[ignus99]

Good choice on the valve, too bad I can't help much on the MAF-less tune part.

[DRAKLORE]

Have you seen my setup?



My Forge 007 Dv dumps to atmosphere

[ignus99]

Just to clarify, hopefully I didn't misslead you as I initially thought you were keeping your MAF tuning:
If you do go MAF less, then you don't need to restrict yourself to a recirculating/BOV dual port... you can go strictly BOV

One of the only reasons I have chosen to go with TurboSmart is there are one of the only companies that have a dual port valve... most valves (such as Shanes 007 Forge) have only one port, limiting you to either recirculate it, or to vent to atmosphere.

I am 100% happy with my valve tho, any valve you choose will work well (except HKS because they you will sound like an Integra with a turbo)

[DRAKLORE]

With your maf located to say where mine is, your not restricted in any way to any valve or BoV, at least I certainly do not understand how you would be :-/

[abzoni]

I like the option of being able to switch between full bov and hybrid so it's all good!

How hard was it to relocate the MAF Shane? Anything in particular I should watch out for?

[CorneliusRox]

With your maf located to say where mine is, your not restricted in any way to any valve or BoV, at least I certainly do not understand how you would be :-/

zero reason to not run a BOV unless you dont like the sound. Plus without setup, it would be tough to do it if you wanted having the filter right on the turbo.

BTW, should we start a pool to see how long before you have a custom exhaust mani putting your turbo right behind the headlight opening like Doctors? ;-)

[ignus99]

zero reason to not run a BOV unless you dont like the sound. Plus without setup, it would be tough to do it if you wanted having the filter right on the turbo.

BTW, should we start a pool to see how long before you have a custom exhaust mani putting your turbo right behind the headlight opening like Doctors? ;-)

Heh such a ballsy mod. I just got my bixenon, I couldn't even imagine drilling a hole through them.

[DRAKLORE]

A bit more cocaine and I would have gone one step further and taken a holesaw to my bumpers as well... Lmao

But yea I would love a tubular manifold, but I honestly have yet to hear any real pros vs cons that make a tubular manifold better than a log manifold.

The maf wasn't hard to relocate, just extend the wires and just make sure your not modifying the maf housing. Other than that.. No issues :-)

[CorneliusRox]

A bit more cocaine and I would have gone one step further and taken a holesaw to my bumpers as well... Lmao

But yea I would love a tubular manifold, but I honestly have yet to hear any real pros vs cons that make a tubular manifold better than a log manifold.

The maf wasn't hard to relocate, just extend the wires and just make sure your not modifying the maf housing. Other than that.. No issues :-)

Log can normally handle more heat without cracking over and over, tubular will probably bring your spool up time down 25rpms. lol It is supposed to create less drag, more velocity, and even resistance for cylinders. idk, I am not sold on it either, but it definitely looks cool! That being said, I would always go log style on my truck, even if I was pushing 1000hp.

[DRAKLORE]

Right the pros cons of
Each make them equal in my mind.

I've been told tubular can flow more volume, but log is shorter and flows faster.
Then it's durability of log, I guess you could ceramic coat either or, and then of course tubular looks better lol

If your turbo
Outlet is 2.5" or 3", why does it matter that you have 4" of tubular manifold?

[jimrobbington]

So could anybody, theoretically, move their maf over to where Shane has it? Even on a regular OTS tune, would it work? Does it affect performance in any way?

[CorneliusRox]

Right the pros cons of
Each make them equal in my mind.

I've been told tubular can flow more volume, but log is shorter and flows faster.
Then it's durability of log, I guess you could ceramic coat either or, and then of course tubular looks better lol

If your turbo
Outlet is 2.5" or 3", why does it matter that you have 4" of tubular manifold?

4"?! Usually they are matched up as close as possible (or one step bigger) than the exhaust port on the head and the fact that the dia isnt huge and doesnt make sharp bends makes it have a higher velocity. I have also heard both ways that the length being equal helps power, and the plenum result of a log makes more power with the engines pulses (give/take like driveshafts with u-joints keeping the start and finish angle parallel if you understand what I mean).

So could anybody, theoretically, move their maf over to where Shane has it? Even on a regular OTS tune, would it work? Does it affect performance in any way?

yes but you have to gut the PCV system and clean your intercooler(s) since oil makes MAFs angry.
I want to do it too JR! Then do a creative intake system.

[DRAKLORE]

Theoretically I've solved the carbon build up issue..

[mr shickadance]

Theoretically I've solved the carbon build up issue..

egr delete?

[CorneliusRox]

Theoretically I've solved the carbon build up issue..

ha ha that solution was around long before this engine was even thought of.

[DRAKLORE]

egr delete?

The FSI does not have EGR!

ha ha that solution was around long before this engine was even thought of.

I guess lol
But how come everyOne is focused on catch cans and methanol and Seafoam, yet no one has just deleted the shit of of the PCV and gone to an atmospheric setup?!

Maybe I will start a trend lmao

[CorneliusRox]

The FSI does not have EGR!



I guess lol
But how come everyOne is focused on catch cans and methanol and Seafoam, yet no one has just deleted the shit of of the PCV and gone to an atmospheric setup?!

Maybe I will start a trend lmao

lol I said that somewhere when I first got on here and ppl gave me shit for it so I have collected all the pieces to do it myself, but I am waiting on some special fittings from work (230micron filter in 90deg push to connect fitting!). Not giving you a hard time, just saying good work, and we were on the same page.

[ignus99]

This thread has gone WAYYYY off topic, HAHAHA.

[DRAKLORE]

Sorry :-(
And I remember you saying that Corney, now just Do It :-)
You won't be sorry

Anyways... Anyone running a Maf-less tune?
Haha

[ignus99]

Abzoni - since you have a reputable shop doing the work for you.... I say go for it!! be a pioneer for the mafless tuning!!!

I really really REALLY want to go maf-less... as I have had problem after problem with my MAF but I don't have the time to precision tune it right now.

[CorneliusRox]

Sorry :-(
And I remember you saying that Corney, now just Do It :-)
You won't be sorry

Anyways... Anyone running a Maf-less tune?
Haha

I need to! then spray down my intercoolers with brake cleaner, rout my MAF in with a honeycomb before it, and unhook the DV back to intake part. Maybe a cool filter like yours too, but heat would be an issue

[Jay-Bee]

Theoretically I've solved the carbon build up issue..

Unless you have modified your intake/exhaust valve over lap and wave resonance, you didn't solve it, that is still going to be a major factor in DI engines.. You reduced it by a lot, but not 100%.

;)

But I like what you did.

[DRAKLORE]

Your thinking to much about it lol

There's that point where it's so insignificant I'd like to think the methanol is keeping up haha

;-) thank you lol

[digitalAUDI]

Hey Draklore, your new setup looks good, I only have a question about the location... is water a problem in the sense of getting the MAF wet when driving in the rain?

[DRAKLORE]

No
More of a problem
Than a stick location maf, water would
Have to splash up and into the turbo, then all the way through the turbo and intercooler, and finally the maf comes from the top of the piping, so it would have to be pretty catostrophic

[Jay-Bee]

I think he meant more on the exposed electrical connector itself, but i find VAG has done a pretty decent job with waterproofing/seals/gaskets on under hood components.

Unlike their coilpacks of the 90's lol.

[digitalAUDI]

I think he meant more on the exposed electrical connector itself, but i find VAG has done a pretty decent job with waterproofing/seals/gaskets on under hood components.

Unlike their coilpacks of the 90's lol.

Yes, my question was more in reference to be exposed, but both answers work for me.

[abzoni]

at sem motorsport right now and apparently unitronic doesn't have a mafless file for my ecu lol bov going in now hopefully hybrid will save me from codes and stalls so i dont have to relocate maf lol

[CorneliusRox]

at sem motorsport right now and apparently unitronic doesn't have a mafless file for my ecu lol bov going in now hopefully hybrid will save me from codes and stalls so i dont have to relocate maf lol

you shouldnt get codes, just less performance. You could just unhook your MAF and it would all work. I hear that brings your throttle response and peak HP down though.

[abzoni]

Everything's on but I noticed a few things on the way home: my car now backfires lol when I let off the throttle there will be a pop after a couple seconds, and it wants to stall if I'm in neutral while moving for an extended period of time (idling while parked is normal). Should I be concerned with any of this? I don't really mind the backfire it sounds kinda cool and it's funny when it scares people beside me =P I could always plug the vent and make it full re-circ if any of the above symptoms are bad.

[Sales@RAI]

Have you seen my setup?

did you resistor the sensor? If you set it up for blow through MAF, you have to resistor the MAF, so that it works 100% correctly.

[DRAKLORE]

your saying resistor it because of the colder temps?

why would i need to do that, car is running fine at this point!


AND ABZONI, i just sent an email to 02serv about your exact issue, i told him theorectically it would happen lol,,, and i click this thread and boom its true! i feel like nostradamus, or w/e haha

basically the maf is only sensing the air that passes by, when your car DVs it sends air and surges the MAF a bit i assume, now the ecu anticipates that, but it no longer happens.. im sure there is also some sort of programming that adjust the fuel trims to compemsate for the DV air, long term fuel trims after extensive driving at a constant RPM would be prepared for the characteristics of the electronic DV but instead it now dumps to atmosphere...


I have had literally no issues dumping my mechanical forge 007 to atmosphere, perhaps it has to do with my MAF location? or perhaps tune? who knows but i do not get stumbling or hesitation...

[CorneliusRox]

did you resistor the sensor? If you set it up for blow through MAF, you have to resistor the MAF, so that it works 100% correctly.

dont we have hotwire MAF's?

[02serv]

If the you place the BOV before the MAF wouldn't the MAF not see the air that is being vented

[abzoni]

your saying resistor it because of the colder temps?

why would i need to do that, car is running fine at this point!


AND ABZONI, i just sent an email to 02serv about your exact issue, i told him theorectically it would happen lol,,, and i click this thread and boom its true! i feel like nostradamus, or w/e haha

basically the maf is only sensing the air that passes by, when your car DVs it sends air and surges the MAF a bit i assume, now the ecu anticipates that, but it no longer happens.. im sure there is also some sort of programming that adjust the fuel trims to compemsate for the DV air, long term fuel trims after extensive driving at a constant RPM would be prepared for the characteristics of the electronic DV but instead it now dumps to atmosphere...


I have had literally no issues dumping my mechanical forge 007 to atmosphere, perhaps it has to do with my MAF location? or perhaps tune? who knows but i do not get stumbling or hesitation...

haha should've cc'ed me in that email so i expected it xD I'll let it be for a week and see if ecu adapts to it or not, then I'll let the guys at the shop know when i go put in my mbc next week and decide what to do then.