That Other Guy With A Brilliant Yellow B5: The Banana - BT Build & Story

[RastAudiA4]

Lol - I am not hating MAFless, however it is not the way its supposed to be on this car, simple turbocharging EFI injections basics, specially in this case. I know this is mostly above average joes who just wants power out from their car, but its good to know how it should be done properly and wt it means in this car.
mafless makes sense on SD ( speed density) because you dont care about flow there only manifold pressure with an actual MAP sensor, so you can run bovs and all that crap.

Second thing is that a MAF is very fast and accurate and nothing will beat it in what it was designed to do, certainly not alpha n.


If you only want sound, add a CAI and you will have intake sound a maf doesnt restrict intake compressor sound very much, run opendownpipe and you will have turbo sounds for days.

Lol - I am not hating MAFless, however it is not the way its supposed to be on this car, simple turbocharging EFI injections basics, specially in this case. I know this is mostly above average joes who just wants power out from their car, but its good to know how it should be done properly and what it means in this car.
mafless makes sense on SD ( speed density) because you dont care about flow there only manifold pressure with an actual MAP sensor, so you can run bovs and all that crap.

Second thing is that a MAF is very fast and accurate and nothing will beat it in what it was designed to do, certainly not alpha n.


If you only want sound, add a CAI and you will have intake sound a maf doesnt restrict intake compressor sound very much, run opendownpipe and you will have turbo sounds for days.

Ok I understand and I hope you took no offense to that, and yes i agree with you on the idea of a MAF. On our cars it is designed to be used as the way you described. And to be honest this is my first time running a MAFless setup and have no idea what to expect of the "base mafless" file i purchased. Also i do believe there is a reason to delete the MAF, technically with proper tuning it is NOT needed....maybe better to drive but not needed.

I've ran MAFless with a BOV for a few years now, different setups, different turbos. I don't know tuning, but mine was done by a professional. Never had an issue running MAFless, neither has many other's. It really boiled down to a preference thing with driveability when it came to running a MAF or no MAF. With me, less parts meant less parts to fail. The more I could junk, the better. Worked for me fine, thus far.

Lol you know I gotta chime in now >:D first off Blazius hates mafless I’m just gonna have to say it’s a fact hahah.Anyways I’m putting another plus one for mafless set ups.... I’ve put 600 miles with new turbo set up thus far my maf set up could be a little iffy(as I’m running it with a 90degress turn straight off the turbo no filter just guard for compressor wheel >:D. I tried with filter I didn’t like it....but when I used maf the car would choke have little hiccups in neutral rolling to a red light it would want to stall in city driving situations like someone was putting there hand over it. bought new maf and same problems persists. Wasted 170$ real quick. my maf has been unplugged for the past 400 miles and runs badass in the city or mostly highway it’s big turbo and no choking.I’m sorry but if I can do 120 mph throwing me in the seat and bully Porsche’s on the highway in LIMP smh then so be it... just call me ktlimp instead haha it’s more so the n75 you gotta figure out. it wants to do these boost fluctuations at part throttle it does this with or without the maf... this problem will become more important later..im in the process of writing the perfect requests.. but your not using n75 either so ima have to say run it your def not gonna regret it unless your in 30 mph limp aka real limp mode that’s different tho... I would say as long as your wastegate setup is good and kinda controllable I think you’ll be happy running mafless you’ll drive the rest. gives the car a little attitude/personality beefy turbo sounds on the side and shit

As ktsimp721, and Seerlah mentioned, a mafless file with proper tuning can be just as good, and I don't want to deal with excess sensors in the car anyway if i can delete them without major harm. I agree with you 100% with someone running a closer to "stock" build meaning all sensors are still in play. My build is completely one off and custom so to speak, and tbh i felt as if the MAF might have caused more headache in the long run..... From Seerlah "Mine is simplified for simplicity sake, to keep it simple."



Also thank you all for the info on MAF vs MAFless, I am aware of the decision i made and understand the consequences, but honestly have no idea what's gonna happen when it cranks up. AND i do love running no filter on the compressor housing :) much cleaner look. To me that is was the best part of this build. SO much was just a theory of physics, research and logic. Worst and best thing i've ever done was to do something no one else really doesn't do, it was a reward to overcome such obstacles.


With that being said, this was a hell of a build for me as I am not a mechanic or own a shop. Im sure you can notice but this was all done in my APT complex in a parking space in FL heat. I learned a lot and will NEVER plan a build like this again as i was not prepared enough. I had everything planned out in my head and took it too the car, however DID overcome all issues with a little "Fuck it" and maybe whiskey or two. Now i get to see what doesn't work and what does. Creating this thread was the best thing for my motivation and hope you guys are actually enjoying it as much as me.

This is my first BT build, and it feels good to gawk over my car as i did many of the others on this forum for a LONG time. Not sure if any of you actually ready the story of this car lol, but it is very special and fells good to accomplish a goal set years ago. But never forgotten.

Alas the last thing for me to physically do before seeing how much i fucked up is just to add oil and coolant, and find someone to make or sell me a vband downpipe for the turbo.

There is still more to come so stay tuned but I believe I have finally completed phase 1 of this build: Playing legos...Much more still to come but check it out, and if anyone can give me some REAL feedback, I have major OCD and i want this thing to be soooo much cleaner, I know i have much more time, but what you guys think? how did i do? You Jelly lol? Couldn't have done it without Audizine. Don't be afraid to tear me a new one, i dont care what you think but i do humble the opinions and visions of others and would love to hear some feedback on this as it kicked my ass so hard and killed my motivation, when it was done I couldn't really enjoy it lol....

For a reminder phase one of my build was just making sure my vision on paper and thought can be applied. Next things to do is to get it running enough to daily it for a few weeks. Then we pull the engine and put in rods and clean up even more.

MY FIRST BT BUILD, CAN I PLEASE COME IN NOW? lol....