GSR Technik 228i N20 ECU Flash Tune Now Available 50whp/90wtq |
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07-02-2015, 08:28 PM | #133 | |
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07-07-2015, 08:16 PM | #134 | |
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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. |
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07-07-2015, 08:36 PM | #135 |
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07-07-2015, 08:42 PM | #136 | |
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07-07-2015, 08:54 PM | #137 |
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07-07-2015, 09:04 PM | #138 |
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07-07-2015, 11:17 PM | #139 | ||
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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. |
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07-08-2015, 01:55 PM | #140 |
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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........
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07-08-2015, 04:20 PM | #141 |
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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. |
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07-08-2015, 09:39 PM | #142 |
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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
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07-08-2015, 09:45 PM | #143 |
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07-15-2015, 11:52 AM | #145 |
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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? |
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07-15-2015, 05:23 PM | #146 |
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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? |
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07-15-2015, 07:13 PM | #147 | |
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Awesome.
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07-15-2015, 09:23 PM | #148 | |
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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? |
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07-15-2015, 10:06 PM | #149 | ||
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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. Last edited by Stubok; 07-16-2015 at 05:18 PM.. |
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07-24-2015, 01:06 AM | #150 | |
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Nick... |
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09-05-2015, 02:38 PM | #152 |
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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
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11-01-2015, 04:37 PM | #153 | |
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11-01-2015, 06:23 PM | #154 |
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GSR Autosport Have you run into shaking engines upon startup after cold start with the n20's?
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