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Originally Posted by themyst

Does the wastegate adaption impact the rattle fix on light accel? I noticed the rattle has come back after a few days. Odd.

No that doesn't effect low throttle stuff. Only default wastegate duty (until boost goes over 1.5psi), and then the base duty cycle values after that. "

Today, 12:24 AM

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Originally Posted by Dirty Dog

In for user adjustables however you'll probably end up creating even more work for yourself with in experienced users.

Yes I know. It's a double edged sword. "

Yesterday, 08:06 PM

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Originally Posted by Njz

any updates here @Terry@BMS ? I am going in next week to undercover.

It's working at least as well as a single or dual in tank pump. But I still can't tell if its working better as I didn't get a good 100% E85 log on the factory turbos with the in tank pump and I'm too lazy to put it back in. Here is a log I just did, straight E85, map 7, on our E85 (leaner) flash. Fuel pressure dips at the shift but doesn't tank. But note IAT is > 100 degrees. When it cools down tonight or this weekend I'll do the same run with a 60-70 degree IAT so we can see where it really stands. I expect it will tank then.

As next steps I have the Vargas fuel rail to install. And will be doing their pump. But I'm out of fuel system ideas at the moment. Unless some legitimate fuel pump company starts making a new pump (not upgrading the factory) I don't think we'll be able to get away from meth for fueling help. "

Yesterday, 03:49 PM

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Originally Posted by Tzu

Terry did it already with 20D. My car has always made this noise and I never thought it was the DC mapping itself. Makes sense though, depending on WG position, WGDC and exhaust pulsations, you're getting the perfect storm for rattle. Hindsight is always 20/20 lol.

I'm waiting around to for addl feedback but I may add that min PWM curve scalar to the wheel control menu. Maybe make it user adjustable from 25% to 40%, for example. It's currently set around 32%. Too high causes problems but too low causes other problems. 32% seems to be just right for most. "

Yesterday, 01:09 PM

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Originally Posted by dzenno@ProTUNING Freaks

huh? lol

Figured it out years ago when developing the dpfix. Throwing off the rear sensor signal a small amount eventually causes the primary sensor to go off track. Which causes all sorts of headaches as the DME thinks its running some AFR but is actually running richer or leaner than that. The system learns during sustained cruising where you're running close to stoich. Surprised you guys don't know about it. I guess you thought it was just magic adding an improperly calibrated dpfix to the rear sensor always causes primary sensor 2C31/2C32 trim codes? "

Yesterday, 11:32 AM

Yesterday, 10:36 AM

05-23-2013, 06:42 PM

" I've seen some data on ASR turbos. They look to perform about like RB to me. The real issue with ASR isn't their N54 turbos its everything else with the business including the ownership. "

05-23-2013, 03:12 PM

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Originally Posted by jpsimon

When is chucks car ready? are you working with him?

I am but I think he changed plans on the hardware. He had a horrible experience with his installer and had to replace his entire motor. Everything left a bad taste in his mouth which is understandable. "

05-23-2013, 02:28 PM

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Originally Posted by jpsimon

TurboMike's car is at GIAC, sounds like among other setups they're going to tune an aggressive e85+meth map. we should see some nice numbers out of that

Yes hopefully so! If not he should drop the car off with me for a few days. I'd be happy to push the crap out of the turbos for him. "

05-23-2013, 02:14 PM

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Originally Posted by jpsimon

It seemed people were still complaining about it on e90post. Anyways, i'm happy it was such a simple fix.

Nothing is ever simple when dealing with thousands of cars! But if you are not over boosting down low, etc, then its probably fine.

Normally guys who use e90post are the ones that don't know about software updates or how to set things properly. They should really be reading n54tech instead. "

05-23-2013, 01:29 PM

" Duty cycle is not really an indication of "safety". It's just a relative measure of vacuum applied to the wastegate actuator. Once you start changing around wastegates, etc, then it's only useful for comparison to the same car at various boost / rpm levels.

Anyway, log looks pretty solid! Hopefully someone can crack 500rw with these soon. 20psi, 12 degrees, on a dynojet, is the basic formula. "

05-23-2013, 01:25 PM

05-23-2013, 01:19 PM

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Originally Posted by marv85

basically you can create a map6, and then use the meth additive to increase boost above your map6 setpoint? Does it shift the whole boost curve up by the additive?

With map 3 we have set a high and a low map and the meth flow (and modifier for octane adaption) moves target between those two maps. With map 6, the additive becomes the boost value that is added on top of map 6 as a function of meth flow and the modifier. "

05-23-2013, 11:41 AM

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Originally Posted by Flinchy

we pretty much ONLY have dynodynamics here... but they consistently read a lot lower than the numbers you guys get on your dynojets (my N52 reads 15-20whp lower at least)- i'll have to try and source a dynojet in brisbane here one day lol

The dynojet is the only type of dyno useful for comparing numbers via the internet. It's not always the best dyno to do tuning on but most of us tune on the road and just use the dyno for verification. "

05-23-2013, 11:37 AM

" Was done a couple weeks ago. "

05-23-2013, 11:02 AM

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Originally Posted by mykal

I run E50 + meth but I have the "E85" flash loaded, should I go back to the old "race" flash I have from a few months ago?

It doesn't really matter... "

05-23-2013, 10:36 AM

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Originally Posted by keikdasneak

You can use meth with Map 7?

Sure. You can use meth with any map. But there is no safety or progressive boost mapping unless you are using map 3 (or do up a special map 6). People who run heavy E50 mixtures or race gas don't need a safety so sometimes they prefer map 7. With a BMS kit meth will flow on map 3, 6, & 7 by default. But the additive is only considered on map 3 & 6. "

05-22-2013, 11:27 PM

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Originally Posted by themyst

Terry, food for thought:


I know you love running lean-ish on E85 mixtures but I think 12.5 is the sweet spot for a bit more safety and consistency on it. Rather run rich if it isn't costing you significant power than go all out. sweet numbers though

Yeah normally E50 + meth customers would use the "race" flash. But this one only runs meth sometimes. So runs the E85 flash full time. And the only way to do that is with the leaner air/fuel ratios. "

05-22-2013, 11:25 PM

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Originally Posted by Q4P

this is of course assuming terrys 290 whp baseline dynojet... so pull 20 whp to be even w everyone else lol. A stock 335i dynos 265-275... any less and u have a low reading dyno, any more and u have a high reading dyno. Simple as that...

SpecialtyZ is considered the gold standard for dynos in this area by the boosted M3 crowd. This is the same dyno both Drew and Sticky use for their testing. They report it reads lower than some other dynojets in the area. I've been using it for years before SpecialtyZ owned it when it was LAPDs (corvette shop) dyno.

I dyno stock cars there all the time. They do 275-280whp. A few months ago I dyno tested a new 535 and he definitely did not think it was a high reading dyno. "

05-22-2013, 09:03 PM