[iaknown]

Originally Posted by BB_cuda

Can someone explain (perhaps again if in thread earlier, sorry) how to get the flap open? Is it a simple pull on it type of thing of do you have to vacuum actuate or something? Thanks

Remove the nut on the rod end and remove the 2 bolts that hold the actuator to the bracket. This will allow you enough movement to take it off the flapper arm completely.

[BB_cuda]

Originally Posted by iaknown

Remove the nut on the rod end and remove the 2 bolts that hold the actuator to the bracket. This will allow you enough movement to take it off the flapper arm completely.

Appreciate! I can't push this button on iPhone. Thanks Iaknown

[Yozh]

Originally Posted by BB_cuda

Appreciate! I can't push this button on iPhone. Thanks Iaknown

I did it for you...

[BB_cuda]

@TDI, I went back and read very early portion of thread. You commented about Android app torque reading 4-5 psi lower than analogue gauge. I recall you saying the boost pressure is computed to get Torque app value where as the analogue gauge is direct. Is the analogue sensor piezoelectric based or strain gauge based? Piezo would be much more of a dynamic capable i.e. better ability to react quickly whereas strain gauge is more close to DC level signal from a frequency perspective. Piezo based pressure sensor is just like piezo accelerometer but without the use of a reference mass. i will go look up your boost gauge setup. I'm investigating to measure from same place on my "gutted" EGR housing. I wanted to measure peak boost for stage 2 JR Auto tune but with OEM exhaust still in place (except of course the Ecotune downpipe is in play). thx

[Hoooper]

uhhhh, how or why did 2deer get banned?

[rulonger]

Originally Posted by Hoooper

uhhhh, how or why did 2deer get banned?

I just saw that also. Why would someone get banned from this board? Did he ruffle the feathers of one of the moderators or encroach on the turf one of the sponsors?

[Hoooper]

Originally Posted by rulonger

I just saw that also. Why would someone get banned from this board? Did he ruffle the feathers of one of the moderators or encroach on the turf one of the sponsors?

I dont know. I checked his recent posts and dont see anything, but its possible if something went south the posts were deleted. Could also have to do with him offering his pipes for sale without being a vendor, depending on how up tight the mods are feeling. You would expect him to just get a warning first but only he and the mods probably would know the story.

Aside from the eastern europeans on the coding subforum who all seem to be banned (I assume the files they were posting links to were viruses), the only person ive seen banned on here was the guy being a megadouche to everyone and he of course got what he asked for.

[rulonger]

Originally Posted by Hoooper

I dont know. I checked his recent posts and dont see anything, but its possible if something went south the posts were deleted. Could also have to do with him offering his pipes for sale without being a vendor, depending on how up tight the mods are feeling.

It is a shame. Guys like 2deer have so much practical knowledge to help others. Those that tinker, build, find solutions and test their ideas are the exact kind of people that these boards need.

But alas, I guess we will never know.

[BB_cuda]

Moderators, please settle your difference with Jess. He didn't bad mouth anyone. Not going to air the laundry here. Mods PM me if you want to talk.

[Yozh]

I do not think mods will see it. may be we should all message the mods...

[TDIwyse]

Originally Posted by BB_cuda

@TDI, I went back and read very early portion of thread. You commented about Android app torque reading 4-5 psi lower than analogue gauge. I recall you saying the boost pressure is computed to get Torque app value where as the analogue gauge is direct. Is the analogue sensor piezoelectric based or strain gauge based? Piezo would be much more of a dynamic capable i.e. better ability to react quickly whereas strain gauge is more close to DC level signal from a frequency perspective. Piezo based pressure sensor is just like piezo accelerometer but without the use of a reference mass. i will go look up your boost gauge setup. I'm investigating to measure from same place on my "gutted" EGR housing. I wanted to measure peak boost for stage 2 JR Auto tune but with OEM exhaust still in place (except of course the Ecotune downpipe is in play). thx

So Torque can try to get boost from the MAF readings and some other data you give it. The problem can come in when the MAF starts saturating. This will cause it to under report.

On a stock car, the other problem will be with the EGR. Under low/lite loads a lot of EGR is being used, so the MAF is missing a lot of the flow that's going into the combustion chamber. Torque will be off in this case as well.

If you've shut off the EGR path, then Torque (based on my measurements) seems to be fairly accurate (if you've given it good parameters, like volumetric efficiency, to work with) for mid/high boost levels up to the point the MAF starts saturating. This was what I was suffering from at the upper rpm's where the MAF wasn't accounting for the extra flow due to saturation of the sensor, and under reporting the TestO and analog boost gauge data.

TestO can read the actual MAP sensor. It has shown very good correlation to the analog gauge measurements.

I'm not exactly sure what the gauge I have is using ... I'd be inclined to guess it's a strain gauge.

[TDIwyse]

Well, I've been doing some more testing on what happens when I open up the EWG to allow more boost. Compare the below turbo measurements to previous data at a lower EWG setting (this one has a higher max scale due to higher EMP).

http://www.e90post.com/forums/showpo...&postcount=211

Basically the ~4500 rpm boost comparison would be 2900 vs 3100 mbar. Or from boost gauge conversion, 27.6 psig vs 30.5 psig.

I'm not able to measure any performance advantage in terms of power from 3800-4500 rpm with more boost. EGT's are even a little higher with more boost...

The ~2900-3500 rpm does show more measured torque/power from PerfExpert, but I don't really like that because the torque is already too damn high there for long term transmission health ...

[TDIwyse]

Also some interesting data for a 3rd gear pull previous to the above 4th gear pull. The engine doesn't get loaded down enough to reach full boost in 3rd...

[DWR]

Originally Posted by TDIwyse

Also some interesting data for a 3rd gear pull previous to the above 4th gear pull. The engine doesn't get loaded down enough to reach full boost in 3rd...

Thanks for sharing the data. To me, it looks like the EWG is dumping the drive pressure too early in the mid rpm range. Have you considered using the wastegate as strictly a drive pressure limiter?

[iaknown]

Originally Posted by TDIwyse

Also some interesting data for a 3rd gear pull previous to the above 4th gear pull. The engine doesn't get loaded down enough to reach full boost in 3rd...

Looks like the EWG is opening right during the turbo switch spike then staying open for the remainder. Can you try a different rate spring? Or somehow use the turbo switching signal (either electrical or vacuum) to make the EWG only work for the low pressure turbo?

[TDIwyse]

Oh man, I don't WANT any more boost there. Both turbo's are working together and in a very efficient manner. As I've raised the boost for these latest tests the torque at ~3000 rpm gets into scary territories ...

Plus, at the 3530 mbar peak on that 4th gear pull, it's ~36.5-37 psig... which is right about where it was at without the EWG and OEM setup internal wastegate that couldn't adequately vent the excess exhaust flow.

I turned the EWG back to where I had it before these latest tests.

[TDIwyse]

Went back and looked at the EMP to IMP for the two different EWG settings I've posted at the upper rpm point of 4400 rpm for 4th gear pulls.

High ewg setting boost relationship at 4400 rpm
EMP IMP
4585 3090

Standard ewg setting I had settled on, boost relationship at 4400 rpm
EMP IMP
4140 2965

To get ~ 125 mbar more IMP required 445 mbar more EMP. Pretty sure that delta indicates the turbo is past it's efficiency point and at the choking edge.

[iaknown]

Originally Posted by TDIwyse

Oh man, I don't WANT any more boost there. Both turbo's are working together and in a very efficient manner. As I've raised the boost for these latest tests the torque at ~3000 rpm gets into scary territories ...

Plus, at the 3530 mbar peak on that 4th gear pull, it's ~36.5-37 psig... which is right about where it was at without the EWG and OEM setup internal wastegate that couldn't adequately vent the excess exhaust flow.

I turned the EWG back to where I had it before these latest tests.

Oh, I thought you were implying the lack of full boost in 3rd was related to the EWG but maybe I misunderstood you....

Either way I still wonder if a different rate spring would help, maybe to help limit maximum drive pressure as DWR suggested.

[DWR]

Originally Posted by TDIwyse

Oh man, I don't WANT any more boost there. Both turbo's are working together and in a very efficient manner. As I've raised the boost for these latest tests the torque at ~3000 rpm gets into scary territories ...

Plus, at the 3530 mbar peak on that 4th gear pull, it's ~36.5-37 psig... which is right about where it was at without the EWG and OEM setup internal wastegate that couldn't adequately vent the excess exhaust flow.

I turned the EWG back to where I had it before these latest tests.

You seem to be saying the experimental tune you have from Jarek will supply enough fuel to make the torque higher than you would like at some rpms. I don't think I would want to try to control torque with the turbo. It seems to make sense to control torque with the remap, as the DDE is designed to do just that.

[TDIwyse]

Originally Posted by DWR

You seem to be saying the experimental tune you have from Jarek will supply enough fuel to make the torque higher than you would like at some rpms. I don't think I would want to try to control torque with the turbo. It seems to make sense to control torque with the remap, as the DDE is designed to do just that.

Well, it's not higher than I like when I'm controlling it with the EWG. This is what I was asking for ...

I've been able to control torque with A/F ratio which comes about by controlling boost. At the lower rpm's where the turbo's are both working efficiently the amount of torque available is scary ... Limiting boost there limits A/F ratio which keeps the torque inline to where I'm comfortable with it, if it's applied appropriately and not on rough road surfaces where shock/transient traction issues come into play and can wreck havoc on things.

These latest tests where I allowed more boost was mainly to check the upper rpm, LP turbo, capability. It was not an intended operation condition for the experimental remap...

Since I don't see any advantage (actually seeing negatives to it) to higher boost at the upper rpm's, and I'm about where I want at lower rpm's with the EWG settings I was using, I think the map is set just about right for my system.

[DWR]

Originally Posted by TDIwyse

I'm not able to measure any performance advantage in terms of power from 3800-4500 rpm with more boost. EGT's are even a little higher with more boost...

The ~2900-3500 rpm does show more measured torque/power from PerfExpert, but I don't really like that because the torque is already too damn high there for long term transmission health ...

Yeah, I can believe we are starting to split hairs at the upper end. There was suspicion that you were getting into low efficiency and your testimony here seems to bare that out. I think you have made a good decision because that kind of performance means the turbo was spinning hard. Good to slow it down and keep it together.

[TDIwyse]

Originally Posted by DWR

Yeah, I can believe we are starting to split hairs at the upper end. There was suspicion that you were getting into low efficiency and your testimony here seems to bare that out. I think you have made a good decision because that kind of performance means the turbo was spinning hard. Good to slow it down and keep it together.

Yep.

I overlaid the two EMP/IMP comparisons, so it's easier to see the increase in EMP at the slightly higher IMP's.

Using PerfExert to measure hp/tq also shows better peak and high end power with the lower boost setting by about 10 hp.