Down the rabbit hole -- 2276 MS3X Turbo build

[theDrew]

In winter mode right now, but I picked up an AEM 30-2340 4 channel o2 setup off of fleabay for not a bad price, so I'll get this up and running.

This uses the older Bosch LSU 4.2 sensors, but that seems to be the only ones that they can get backpressure compensation working on.

I'd love to use the CAN interface on it, but AEMNet and MS3's CAN networks are not compatable if you wanna run other can devices on it, so I'll be running this through another TinyIox and use the analog outputs of it.

I'm also going to ditch the muffler and just run a straight dump pipe while I'm at it. More to come!
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Turbo 2276 MS3X build http://www.thesamba.com/vw/forum/viewtopic.php?t=673125
1985 Vanagon Campmobile w/ 2005 EJ25

[Chip]

Tiny iox is a good idea. I bought an ms3 ultimate for the extra I/0, I currently have a full size I/Ox that I don't want to lose coms with once the 4ch is in place. Did you buy AEMs pressure comp kit too?

[theDrew]

[theDrew]

so heres my simplified exhaust setup -- my hope is ditching the muffler will help fix some of the uneven-ness I was seeing at light loads. I'm just gonna rattle can them flat black with exhaust paint. Since I'm running the per channel o2 sensors I'm not bothering with one to pick up the average of all 4.

I picked up a CNC table for my plasma cutter -- making my own exhaust flanges was a fun exercise.

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Turbo 2276 MS3X build http://www.thesamba.com/vw/forum/viewtopic.php?t=673125
1985 Vanagon Campmobile w/ 2005 EJ25

[Drewmon]

I'm glad I just stumbled upon this post. Great work! I am in the beginning stages of building my EFI Turbo setup. I hope you don't mind if I pick your brain for time to time.

My Plan:
56 Oval ragtop

Building the pan up now with airbags and disk brakes on all 4 corners.

Engine Plan:

2118 EFI Turbo

76.3mm Stroke DeMello Crank Chevy journals
94 Mahle forged B pistons and cyl
CB race H beam rods 5.5"
CB wedge port heads, 650 Springs, titanium retainers 67cc 44X37.5
New Alum case worked over, full flow, piston squirters
CB 2250 cam with Ultralight lifters
Straight cut gears
30mm Oil Pump CB
MST pullyies with DubShop crank trigger
DubShop cam sync
MS3 Pro
DubShop 48mm single Throttle body
CB EFI DP end castings, port matched
CB hideaway exhaust
AGP Turbo .48 A/R
54lb/hr injectors EV14

[theDrew]

The sun finally came out and I got to tear around a bit with the 4 channel EGO.

First off, the simpler exhaust is the way to go, the turbo sounds wicked and also seems to spool faster. Should have done that from the beginning.

I have the per-cylinder trimming turned on, so its yielding some interesting data, I'm not quite sure what to do with it yet other than observe.

Heres a steady state, 3k rpm light throttle:

Note that the EGT's are within a blonde one of each other -- the system has pulled most the fuel in #3, followed by #1. Its adding fuel to #4.

I'm a bit surprised at how uneven they run, but not sure whats normal.

I might play around with the cylinder trim tables, to help out, but I'll just collect more data on it for the moment whenever the suns out.

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Turbo 2276 MS3X build http://www.thesamba.com/vw/forum/viewtopic.php?t=673125
1985 Vanagon Campmobile w/ 2005 EJ25

[theDrew]

changing things up after two years of tearing around.

switching to a single throttle body cause I got tired of chasing balance issues, vacuum leaks and boost leaks.

the new setup should be simpler, and simpler is easier

using a 50mm throttle body with some of CB's high flow castings.

Mostly mocked up at this point, need a few more pieces of pipe and it should be close to done.

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Turbo 2276 MS3X build http://www.thesamba.com/vw/forum/viewtopic.php?t=673125
1985 Vanagon Campmobile w/ 2005 EJ25

[buguy]

Have you gotten the chance to drive it yet with the single TB? I've been thinking about going to dual TB's from my single because I thought it might help with throttle response. My intake from the TB to the heads is pretty long though and I am also using a 50mm but it's on a fairly stock 1600 with a small turbo.

[theDrew]

[buguy]

That's awesome!! I talked to another guy that said he picked up 50hp going to duals from a single. It is a high hp deal though.

[Dauz]

What TB did you use? I want to try a smaller one.

[theDrew]

[rayjay]

Thanks for posting. This is the exact sort of setup I want to duplicate. I bought some steel Kadron manifolds and plan to add injector bungs, etc to them. I was thinking of routing the inlet runners above the alternator.

[buguy]

I have a 50mm TB too. I hope it works better on the new engine than it did on the 1600. I could make full boost at like 50% throttle before.

[rayjay]

I'm thinking about the 50mm Jeep TB.

[Dauz]

[buguy]

Drew you don't happen to have a link to that TB do you? I'm going to be changing stuff up a little on mine soon and could use something more compact than the one I have. The one you found looks nice and short.

[panel]

theDrew......can you explain what these are in your build?

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My '65-Subaru EJ20 Turbo conversion

[theDrew]

[panel]

So for the non computer engineer guy like myself.....what are the benefits to those and where does each one go to etc ? Can't make out in the pics but looks like they are labeled ?
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My '65-Subaru EJ20 Turbo conversion