[OpenAir]

Originally Posted by Stubok

Thanks for the input!

Those are some low dyno numbers. I baselined 248hp and 260lbft on a dynojet on a 80deg day here in TX.

Based on those delta's I would be about 290hp and 310 lbft at the wheel.

In any case I know of at least 3 other guys plus me having some anomalies with stage 1. So there is something else at play with stage 1 and either coils, MAF, boost leak, stock DV or something else.

Dyno's run different depending on type, the key is the delta. I am curious about your Stage 1 issues though.

[GSR Technik]

Originally Posted by 2msport

Hey not sure if you saw this question but I'm quite curious so I reposted it.

Hey man, in racing situation absolutely. With long periods of constant high RPMs, deceleration, operating temps, etc. and desire to get every little bit out of the car it makes sense. Also falls into standard post race maintenance regimen. For street cars we hardly ever add catch cans because typically most of the performance is in short spurts and the advantage vs convenience is much less.

One could argue that running on the razors edge this would help but most of issues we are seeing is just dealing with boost leaks and DVs, not necessarily misfires created by oil displacement.

[GSR Technik]

Originally Posted by Stubok

I'm on stage 1 with CEL delete for DP.

Only put 93 in.

It seems like there is something funky going on with the DP and 93 combo.

That said I may not be a good example, as suspect a boost leak.

Boost leaks are one of the most common issues we are seeing.

[GSR Technik]

Originally Posted by ROBNYC

GSR Autosport has the 350wtq limiter been revised if it only affects Automatics and not Manual cars?

For us with 93 octane otherwise stock wanting to get the ECU Flash stage1 what will happen? Is the issue happening with 91 octane or 93 as well ?

goon Stubok what do you guys think

We have only seen this on the autos and unfortunately have not resolved. We have seen some cars running 93 bump into the limiter so on the latest Stage 1 tune we have rounded out the initial torque spike to reduce the chance to bump into the limiter.

[GSR Technik]

Originally Posted by OpenAir

I've got one in my car, and I plan on looking at it this weekend...will let you know if it "catches" anything. I will say that when I installed it, there was oil in the tubes...

How did the test go?

[OpenAir]

Originally Posted by GSR Autosport

How did the test go?

It's been raining every day since Friday

Haven't had a chance to crawl under the hood and check it out. I'm hoping to try tomorrow as it's supposed to clear up.

[Stubok]

Originally Posted by GSR Autosport

Hey man, in racing situation absolutely. With long periods of constant high RPMs, deceleration, operating temps, etc. and desire to get every little bit out of the car it makes sense. Also falls into standard post race maintenance regimen. For street cars we hardly ever add catch cans because typically most of the performance is in short spurts and the advantage vs convenience is much less.

One could argue that running on the razors edge this would help but most of issues we are seeing is just dealing with boost leaks and DVs, not necessarily misfires created by oil displacement.

Nick, are you guys planning to do any upgrades to the stock DV? I have the DV+ kit from GFB, but it's not a quick job. Seems the Exhaust/Turbo Assembly has to come out to access the DV.

Also do you guys plan on writing up an engine rebuild thread? I know I speak for everyone when I say we would love to know what it takes to rebuild one and what parts can be upgraded.

A while ago I spoke to Alex at ABR Houston about rebuilding my engine with better bottom end components to cope with a turbo upgrade and the numbers you guys were running. This is what he had to say...

The N20's are still in uncharted territories. We've been in about 5 of them for flood damage, and know their inner workings, but have yet to have a client want to build one (and be serious) about it. The N20's have some VERY strange things going on with them inside, and because of that we had to learn the hard way over those issues when taking them apart and putting them back together.

These engines, along with the N54 engines have taken us over a year in development to properly put them back together without any issues. They are a real bugger. Besides that, the huge investment in special tools needed as well.

I'd say budget wise, to pull an engine/completely strip it down/build it/put it back together/reinstall it, you'd be looking in the 12-20K range depending on what we're doing with the engine specifically.

[CalCarNut]

Originally Posted by GSR Autosport

We have only seen this on the autos and unfortunately have not resolved. We have seen some cars running 93 bump into the limiter so on the latest Stage 1 tune we have rounded out the initial torque spike to reduce the chance to bump into the limiter.

Any reports back on the flash update from those running the latest version? With 91 octane here in CA, we're pretty limited it seems........

[OpenAir]

Had a chance to open up the Catch Can, not much for DD but there was some oil considering it's been in the car for a month or so.



After wiping it out, not much at all...but then again I don't really push my car at all, just an occasional blip through the gears.

[eclipes]

If you baby your car, i dont think the catch can will be necessary. If you track and push it 24/7 then different story

Originally Posted by OpenAir

Had a chance to open up the Catch Can, not much for DD but there was some oil considering it's been in the car for a month or so.



After wiping it out, not much at all...but then again I don't really push my car at all, just an occasional blip through the gears.

[OpenAir]

Originally Posted by eclipes

If you baby your car, i dont think the catch can will be necessary. If you track and push it 24/7 then different story

Yep, that was my point!

[Ace604]

Any feedback from people running the GSR tune?

[Stubok]

My ECU came back with the latest stage 1 flash a couple days ago. I filled up with VPower 93 and spent over an hour testing it out yesterday.

Performance wise it's good. Maybe I was expecting a little more. But I guess they had to turn it down from the last version that was running into trans limiter and other stuttering issues.

The stuttering has largely gone, but there is still an occasional lighter stutter under load and mid to high acceleration around 3000rpm. Though this may be the engine, as there are reports of this from others running stock and with various other tunes.

I should be on a dyno in a couple weeks, so we will see what it's making with my AFE intake, ER downpipe, ER Chargepipes and ATM FMIC.

GSR Autosport A tuner I know asked if we are maybe running into compressor surge. He says it's very common on VW/VAG 2ltr engines running 22psi boost between 3000 & 4000rpm. I seem to remember reading a comment by you on compressor surge. Can you comment on this?

[Stubok]

So I put a bottle of Techron fuel system cleaner in my tank this morning and did some runs throughout the day. A few stints through town and out on the highway.

I don't know if it's the cleaner or if the ECU is adjusting the AFR to the new tune, but the car is running really strong and smooth now! No hesitation, no jerks, just pulls and pulls.

I was grinning from ear to ear on the motor way. 40 to 80 is amazing!

Fingers crossed this is the solution. I'm also going to put some induction/vacuum system cleaner through the engine, as that also seems to be a go to for hesitation etc.

My car group all told me that they put techron through their system every 5 or so tanks. I wonder what you guys think of this?

[CalCarNut]

Originally Posted by Stubok

So I put a bottle of Techron fuel system cleaner in my tank this morning and did some runs throughout the day. A few stints through town and out on the highway.

I don't know if it's the cleaner or if the ECU is adjusting the AFR to the new tune, but the car is running really strong and smooth now! No hesitation, no jerks, just pulls and pulls.

I was grinning from ear to ear on the motor way. 40 to 80 is amazing!

Fingers crossed this is the solution. I'm also going to put some induction/vacuum system cleaner through the engine, as that also seems to be a go to for hesitation etc.

My car group all told me that they put techron through their system every 5 or so tanks. I wonder what you guys think of this?

Pretty sure all premium gasolines have the Techron..but it's probably highly diluted so a moderate 'hit' of a quart or so (whatever the size is) seems to have helped your issues .

Awesome.

[2msport]

Originally Posted by Stubok

So I put a bottle of Techron fuel system cleaner in my tank this morning and did some runs throughout the day. A few stints through town and out on the highway.

I don't know if it's the cleaner or if the ECU is adjusting the AFR to the new tune, but the car is running really strong and smooth now! No hesitation, no jerks, just pulls and pulls.

I was grinning from ear to ear on the motor way. 40 to 80 is amazing!

Fingers crossed this is the solution. I'm also going to put some induction/vacuum system cleaner through the engine, as that also seems to be a go to for hesitation etc.

My car group all told me that they put techron through their system every 5 or so tanks. I wonder what you guys think of this?

Hey I'm also going to adopt the practice of putting a bottle of techron in my fuel system every once in awhile. It's not the first time I've heard BMW engines benefit from it. Glad to hear you're back on track with a strong engine and little to no stutter. I saw another thread on the 3 forum about the n20 having stuttering issues around 3-4k. It's starting to look like theres a common issue with our engine contributed to dirty fuel, intake, or vacuum. Which frankly is good news to me if that's the case because that's an inexpensive easy fix. I had the stutter one time with an accompanied "exhaust valve position" error code like the guy in the 3 forum. I hope that's all it is. Thanks for putting so much research into this. I've been following your posts around bummerpost. I wish bmw would be more helpful in letting us know known issues with this.

Btw how are you go to clean the induction/vacuum line? Seafoam spray?

[Stubok]

Originally Posted by 2msport

Hey I'm also going to adopt the practice of putting a bottle of techron in my fuel system every once in awhile. It's not the first time I've heard BMW engines benefit from it. Glad to hear you're back on track with a strong engine and little to no stutter. I saw another thread on the 3 forum about the n20 having stuttering issues around 3-4k. It's starting to look like theres a common issue with our engine contributed to dirty fuel, intake, or vacuum. Which frankly is good news to me if that's the case because that's an inexpensive easy fix. I had the stutter one time with an accompanied "exhaust valve position" error code like the guy in the 3 forum. I hope that's all it is. Thanks for putting so much research into this. I've been following your posts around bummerpost. I wish bmw would be more helpful in letting us know known issues with this.

Btw how are you go to clean the induction/vacuum line? Seafoam spray?

Not sure how to get it in the vacuum line. Have to work that out.

The engine PCV works in a few different ways. One way when normally aspirated, another when transitioning from NA to Boost and then one way under boost.

Getting it into the induction system should be easy enough. I'll probably just spray it through one of the bungs on the charge pipe while the engine is idling.

Edit: when the engine goes to boost the crankcase ventilation method changes from going through the PCV and to bypassing it. So I don't think this is causing any hesitation.

[GSR Technik]

Originally Posted by Stubok

My ECU came back with the latest stage 1 flash a couple days ago. I filled up with VPower 93 and spent over an hour testing it out yesterday.

Performance wise it's good. Maybe I was expecting a little more. But I guess they had to turn it down from the last version that was running into trans limiter and other stuttering issues.

The stuttering has largely gone, but there is still an occasional lighter stutter under load and mid to high acceleration around 3000rpm. Though this may be the engine, as there are reports of this from others running stock and with various other tunes.

I should be on a dyno in a couple weeks, so we will see what it's making with my AFE intake, ER downpipe, ER Chargepipes and ATM FMIC.

GSR Autosport A tuner I know asked if we are maybe running into compressor surge. He says it's very common on VW/VAG 2ltr engines running 22psi boost between 3000 & 4000rpm. I seem to remember reading a comment by you on compressor surge. Can you comment on this?

Mostly on the VAG cars it was the diverter valves which would be forced open with higher boost levels and at specific sustained boost levels you would hit a harmonic with the spring rate in the diverter valve and it would open and close creating a surging effect.

Nick...

[kanucks]

Will there possibly be another group buy for the GSR F22 N20 ECU Flash tune, if there's enough interest from forum members? Thanks!

[FSociety]

GSR Autosport what is the target boost on the N20 AT on each of your stages?

Is 20 too conservative?
Is 21.7-21.9 w/ DP & 93 octane ok?
Would this cause DTMAL on your flash ?

I've ran 22.1 on my piggyback previously with 0 issues, so trying to understand why my friend is getting DTMAL w/ a BR-P flash

[huma]

Stubok;18259803]

I should be on a dyno in a couple weeks, so we will see what it's making with my AFE intake, ER downpipe, ER Chargepipes and ATM FMIC.

Dyno results? Tried to PM you but your box is full

[mge92]

GSR Autosport Have you run into shaking engines upon startup after cold start with the n20's?