M30 OEM Turbo project

[AndrewBird]

Can you flip the TPS 180º so the plug is facing downward?

[CorvallisBMW]

M30 OEM Turbo project

No, the shaft is keyed so that it can only go on one way. But here's what I did:

Took some of these 90* end plugs that are inside a lot of the various electrical connectors for the engine (these were from the aux fan switch plug) and fitted them to the three pins that are used for the Megasquirt variable TPS signal. Unfortunately the old plastic is really brittle and cracked in a few places, but it will work for now until I can find one at the junkyard in better shape.




Once the dust boot is installed, you can hardly tell the difference


Until you look at it in profile


Plenty of clearance now :)

[ThatOneEuroE30]

No burn out vids yet... I am disappointed

[CorvallisBMW]

Well the good news is that I'll take it to DEQ tomorrow to get new tags (since they expired in October last year...) at which point it should be legal and driving. I actually took it for a spin Sunday morning and it did great! I need to adjust a few settings on the enrich map and idle control, but so far so good :up:

So burnout vids will be coming... soon...

[CorvallisBMW]

I have extra stainless steel heat shields for sale: http://www.r3vlimited.com/board/showthread.php?t=383164

If you are running the factory m106 manifold, you need these!!

[CorvallisBMW]

Made some adjustments to the MS2 system yesterday to try and get it running a little nicer.

- Switched from MAP-based enrichment to TPS-based, seems to have helped the hesitation I was getting when I suddenly snap open the throttle. Still trying to dial in the TPSdot threshold for maximum response. https://www.diyautotune.com/support/...el-enrichment/
- Fixed the bucking on deceleration by running 100% fuel cut instead of 80% fuel cut
- Still trying to work out my hunting warm idle. I got some advice to turn off the ICV, but that just causes the engine to die (obviously). So I'm not 100% sure where to go with this one. It's running in closed-loop mode right now, I might try changing that to open-loop and seeing if it improves. Otherwise it could be something else??

[cleanasse30]

Made some adjustments to the MS2 system yesterday to try and get it running a little nicer.

- Switched from MAP-based enrichment to TPS-based, seems to have helped the hesitation I was getting when I suddenly snap open the throttle. Still trying to dial in the TPSdot threshold for maximum response. https://www.diyautotune.com/support/...el-enrichment/
- Fixed the bucking on deceleration by running 100% fuel cut instead of 80% fuel cut
- Still trying to work out my hunting warm idle. I got some advice to turn off the ICV, but that just causes the engine to die (obviously). So I'm not 100% sure where to go with this one. It's running in closed-loop mode right now, I might try changing that to open-loop and seeing if it improves. Otherwise it could be something else??

Couple of tips that helped me with tuning:
-Watch this video on accel enrichment. It helped me get rid of my hesitation on tip in completely.
-On my m20 I run no ICV, and use open loop. To disable the ICV you need to manually open the throttle screw for idle (be careful, mine snapped and I had to use a bolt. Also use locktite and let it gum up if you replace the screw...) Closed loop is harder to get to be stable from what I've read. Open loop will not compare your real time afr to the target afr table and make adjustments, so tuning idle with open loop is a bit easier to get it to be stable. Once you get a stable idle using open loop then you can go mess around getting closed loop dialed in if you feel like it later on.

Hope that helps. Get that burnout vid up soon! :devil:

[CorvallisBMW]

Couple of tips that helped me with tuning:
-Watch this video on accel enrichment. It helped me get rid of my hesitation on tip in completely.
-On my m20 I run no ICV, and use open loop. To disable the ICV you need to manually open the throttle screw for idle (be careful, mine snapped and I had to use a bolt. Also use locktite and let it gum up if you replace the screw...) Closed loop is harder to get to be stable from what I've read. Open loop will not compare your real time afr to the target afr table and make adjustments, so tuning idle with open loop is a bit easier to get it to be stable. Once you get a stable idle using open loop then you can go mess around getting closed loop dialed in if you feel like it later on.

Hope that helps. Get that burnout vid up soon! :devil:

I was thinking about doing that (deleting the ICV) as I don't really like the way it looks attached to the m106 intake tube. Also I could use the manifold nipple for reconnect my evap canister, which would be cool.

So if I'm understanding correctly, I can run with the ICV in open loop OR remove it and use the screw adjustment also in open loop, yes? Any downside to the screw, like hot vs cold idle speed differences?

[cleanasse30]

So if I'm understanding correctly, I can run with the ICV in open loop OR remove it and use the screw adjustment also in open loop, yes? Any downside to the screw, like hot vs cold idle speed differences?

Yeah that's correct, you can use the ICV in open loop or disable/remove it entirely and use the screw to adjust idle. Idle speed will vary with engine temp though, mine is a bit low until it warms up. I think mine goes from about 750rpm cold to 1000rpm warm.

[CorvallisBMW]

Good news! I passed emissions... After taking out like 30ms of fuel from my idle and leaning it out to ~16 AFR :p



Also took the opportunity to "get the cat nice and warm" with a quick trip through wine country

[bradnic]

YES!!!!!!!!!!!!!!!!!!!!!!!!!

way to go
can't wait to hear this beast - vid please

[Bearmw]

Passed the visual. Impressive work.

[ThatOneEuroE30]

and no burn out vids... car looks awesome though

[AndrewBird]

Passed the visual. Impressive work.

No visual in Portland. All they do is test emissions. As long as you pass, they don't care how you got there.

[efficient]

No visual in Portland. All they do is test emissions. As long as you pass, they don't care how you got there.

That sounds so cool. California should adopt that method.