Air Intake Temps- Stillen SC

JWillis72

The straight before the y is critical! The first pipes I had made had a slight bend before the y and it totally didn't work! The pipe to the outside of that bend got way more air than the inside pipe. If the car sees the MAFs get to far apart the car goes into some safety mode and goes crazy rich and you can't tune it away.


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ChaseZ

It's too bad I sold my bender or I could experiment on my own in the garage before having someone make a pretty one for me lol

One of those tools you don't use much, but is absolutely irreplaceable when you need it.

ChaseZ

Otherwise if I was to go just SD tune I could save myself a whole lot of grief and just do this.

TopgunZ

Ahhh...the Q50 that boasts power but runs without a filter..lol. Is it still breathing?

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ChaseZ

So far so good yeah. Think he runs a K&N or whatever for Street and one of those ones that is barely more than mesh on the track. Something like that anyways.

JWillis72

It looks like it would work but EVOHUNTER tried something like that with Seb tuning his car and they ran out of MAF. I would think if that was an option Seb would have done that on his car unless it was a 7AT car.

TopgunZ

I dont think ecutek was released at that point and uprev cant tune SD. The way the mafs are separated like that would absolutely not work for hybrid maf tuning as the separation would freak the throttle bodies out. When set like that they are used only for temp readings back to the ecu. Which still sucks because that isnt the real temp anyway going into the engine since they are pre cooler. He would have been better off placing the mafs in the manifold after the cooler, which would have cost more to machine the mani out.

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JWillis72

That could be the case but it seems crazy that it was that long ago! My car has been flashed with Ecutek 111 times at this point.

TopgunZ

Speaking of crazy....111 times!

Maybe he just didnt want to fork up the $ to get the MAP sensor and new software/cable.

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ChaseZ

No, that would have to be full speed density tuning for sure.

After chatting with the guy that's going to fab my new pipe for me, he's going to toss a couple MAF flanges in the Stillen charge pipe just like that G above so Seb can get me a SD base tune to get the car started and I can drive it over to his shop. I'll use the Stillen BPV for that trip as well.

Originally was going to go off the charade pipe I have and not bring the car but this Stillen pipe is so tweaked I wouldn't even tconsider using it as a reference for the final product.

It your comment does bring up one question. Seb's MAP kit is on is way to me right now, and he wants my to drill and tap it into the manifold between the TB's right above that barbed brass Stillen line. This would still out the MAP, where he will get his IAT's from, BEFORE the intercooler in the manifold- not after like you're suggesting.

Plus, the Stillen location of the MAP actually IS after the intercooler/aftercooler whatever you want to call it. There's some disimile here that I'd be interested in clearing up.

ChaseZ

I'm only at about a dozen times with Ecutek flashes, up by the time this build is done between now and spring it will probably be two dozen more lol

Good thing Seb gives a year of free updates

Next fall I'll probably tear down again for A/A this time and be in the what, maybe 40-50 range?

It how the heck do you get 111???

TopgunZ

As long as the MAP sensor is in the manifold it doesnt matter where it is as it only reads pressure. The MAFs read airflow and temp. By placing the mafs after the cooler they will be unable to read airflow but will read accurate temps. This would require a tune that is 100% speed density reliant. I am not sure how the car acts under these conditions as that is why sebs tunes a hybrid off mafs and map. That way under any other condition other than wot mafs are utilized reading air flow which, for what i have always understood/read, creates a much better readout so the car runs smoother. I have heard 100% SD tuned cars run crappy when out of wot, which is where you will be 99% of the time your in the car. But, maybe he can tune it to run great with just an SD tune.

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ChaseZ

This is just for a base time to get it rolling, but he has mentioned full SD tuning in he past to me when we first started talking about the concept. I believe it was someone else that told me SD can have a rougher idle, don't think it was him anyways.

Guess I'll get s little idea of what it's like with the baseline tune though. Be interesting to find out if nothing else.

ChaseZ

Though your comment does make me wonder what the point is of the new MAP kit then. If it doesn't matter where in the manifold it is, what's wrong with just using stillens location instead of dropping $300 to relocate it.

JWillis72

I think I have been told that also. I wouldn't think it would matter on the hybrid MAF/SD because my understanding is that the MAF is only used on the low in, I could be wrong but I'm sure Seb can tell you.