[AU335i]

Hey guys, last week I did some logs to see how my new tune was running. I got a flash tune much like GIAC from a local shop (TopSpeed in ATL, GA.) They are a pretty reputable shop and they have worked on the n54 before.

after finally finding some time to clean up the graphs, I notice i'm getting some pretty consistent timing pulls. here are a few 3rd gear pulls I did.








2nd Gear pull to the top of 3rd gear





The timing pulls are pretty apparent right around 5,000 and I remember reading that target ignition should be 10+/- around 5k...so my question is, should I log anything else that may let me know why I'm getting these timing pulls?

I plan on showing these logs to the tuner and seeing what they have to say, hopefully they'll just retune it for me. Anything I should tell them? Thanks for looking!

[boom]

IMO thats too much timing. You're advancing close to 10 deg pretty early in the rev range. Get an fmic or dps or meth.

[AU335i]

Originally Posted by boom

IMO thats too much timing. You're advancing close to 10 deg pretty early in the rev range. Get an fmic or dps or meth.

meth kit sitting in the corner of my room waiting to be installed.

question is, should I let them retune it first? or throw the meth kit on then see how 50/50 meth does on top of the tune already? I fear if meth doesn't solve the issue they may not retune blaming it on the meth?

[enrita]

Originally Posted by AU335i

meth kit sitting in the corner of my room waiting to be installed.

question is, should I let them retune it first? or throw the meth kit on then see how 50/50 meth does on top of the tune already? I fear if meth doesn't solve the issue they may not retune blaming it on the meth?

how much boost are you running? Seems too aggressive of a tune for the mods.
Can you switch maps?

You should have a map that you can run on pump without any timing drops and a second for meth (the one you have now) .
If you plan on run meth instead of buying an fmic you should at least get dps and change tune (Procede or COBB) .

[AU335i]

Some pulls I did tonight.... still getting the same timing pull a week later with different gas. Logged boost this time though...

I used the formula "(target boost - atmospheric boost)*0.0145" to calculate PSI. didnt use "pressure in front of throttle" because I was getting values like "100-200" and gave me a negative number when plugged in.

1-3 pull


Boost graph 1-3


was spinning tires in first, so I guess that explains the boost drop.

[AU335i]

Originally Posted by enrita

how much boost are you running? Seems too aggressive of a tune for the mods.
Can you switch maps?

You should have a map that you can run on pump without any timing drops and a second for meth (the one you have now) .
If you plan on run meth instead of buying an fmic you should at least get dps and change tune (Procede or COBB) .

the guys at TopSpeed ran this exact same tune on a 135i with no problems... actually they were more aggressive I believe.



thats the dyno of their shop 135i all stock on tune only that they said ran strong problem free for a long time...


I even remember reading from a reputable member on this forum that tunes like COBB stg. 1 is very conservative for these cars and I shouldn't be pushing much more than than a COBB Stg. 1 car.

[enrita]

thats way to much boost for a stock car with that timing curve. Seems more like a stage 2 tune .

[XJS]

In comparison my car with GIAC stage 1 with FMIC remains under 13psi at all times and drops under 11psi at redline.

With that boost curve you have a different tune.

[tscdennab]

What does "much like GIAC" mean ? These graphs look "much like Cobb" to me. There is too high boost for your car, and quite a bit of ignition advance too. It's like a Stage 2 tune that you are running on a Stage 1 car.

[Mike@N54Tuning.com]

It does seem this tune is too aggressive of your car/mods. Its a lot of boost for a stock car.

Mike

[AU335i]

Originally Posted by tscdennab

What does "much like GIAC" mean ? These graphs look "much like Cobb" to me. There is too high boost for your car, and quite a bit of ignition advance too. It's like a Stage 2 tune that you are running on a Stage 1 car.

"much like" meaning its a flash based tune without a handheld programmer to switch maps =\ other than that, it's a completely different tune that was custom made specifically for my car dyno tuned.


but thanks for the responses guys. Do you think throwing on the meth kit would allow me to run this map better? or should i just bring the car back to them and ask for a retune?

[Jeff@TopGearSolutions]

Running methanol would be a band aid. If you do run methanol run a small nozzle. No bigger then M5. What I'm trying to say is you might go slower if you run methanol but you would clean up the ignition. To maximize methanol you must add boost and ignition.

As far as the tune itself it is too aggressive for your car.

Was the car dyno tuned and then tweaked on the street? If the latter never happened that is likely why. Load on the street is much different then a dyno can reproduce.

Dyno's are great for tuning, and finding where you can make power but the street is the end all be all for real world conditions.

Also the best gear to log is 3rd on the street and 4th on the dyno.

The boost is not too high. I seems to be about 15-16 tapering to 14? I cant really tell. It just appears to be too much ignition out right.

[Bleep]

Seems way too aggressive, nearly 15 psi at redline?

[AU335i]

Originally Posted by Jeff@topgearsolutions

Running methanol would be a band aid. If you do run methanol run a small nozzle. No bigger then M5. What I'm trying to say is you might go slower if you run methanol but you would clean up the ignition. To maximize methanol you must add boost and ignition.

As far as the tune itself it is too aggressive for your car.

Was the car dyno tuned and then tweaked on the street? If the latter never happened that is likely why. Load on the street is much different then a dyno can reproduce.

Dyno's are great for tuning, and finding where you can make power but the street is the end all be all for real world conditions.

Also the best gear to log is 3rd on the street and 4th on the dyno.

The boost is not too high. I seems to be about 15-16 tapering to 14? I cant really tell. It just appears to be too much ignition out right.

yeah it wasn't tweaked on the streets. and normal stg.1 tunes (stock car) run about 13-14 psi. so would you say this car is already set up for a small meth injection since boost and ignition are increased over other stg. 1 tunes?

waiting on an email from the tuner before I do anything.

[Jeff@TopGearSolutions]

Originally Posted by AU335i

yeah it wasn't tweaked on the streets. and normal stg.1 tunes (stock car) run about 13-14 psi. so would you say this car is already set up for a small meth injection since boost and ignition are increased over other stg. 1 tunes?

waiting on an email from the tuner before I do anything.

Typical Stage 1 would normally run about 15 PSI mid-range tapering to about 12 Red line.

As far as ignition in the fat end (mid-range) typical ignition is as low as 2 degrees ignition and ramps up to maybe 12 at redline with the above boost curve.

I already knew this tune wasnt tweaked on the street.

Let me know if you just want a Cobb and avoid all the troubles.

[Brey335i]

I'd have thought a custom tune wouldn't do this... IMO you're better off getting your money back and switching.

[FastBimmerN54]

Originally Posted by Brey335i

I'd have thought a custom tune wouldn't do this... IMO you're better off getting your money back and switching.

Jeff hit the nail on the head. A good tuner finishes the tune on the street which this guy never did.

[AU335i]

im a very nonconfrontational person so i dont even know how id go about asking for my money back =\

[jpsimon]

email them the logs and tell them it's clearly too aggressive.

that being said, i had top speed tune my WRX back in the day and they did a great job

[AU335i]

Originally Posted by jpsimon

email them the logs and tell them it's clearly too aggressive.

that being said, i had top speed tune my WRX back in the day and they did a great job

Sent them an email for sure!

the guys at topspeed are great guys. hands down one of the best shops i've ever been too customer service wise. So hopefully there wont be problem working things out.

and yeah they have had great success with other platforms.