Compounds for the Passat

[486] · Apr 9, 2014

Hm, interesting.
In the mechanical world I'm from where there's no injection timing advance that isn't an issue, actually it probably compensates a little bit for the lack of advance at higher RPM.

Well, I'm tuned in for future updates. Oh and JFettig, if you find yourself needing a plasma cutter again sometime just send a PM or something. Got a portable one and forest lake ain't far off.

JFettig · Apr 9, 2014

Awesome, thanks for the offer!

v8 coupe · Apr 10, 2014

ne interested to see how this goes. Fueling will be the biggest issue on the power side.

JFettig · Apr 10, 2014

Little more work done tonight, just need to get a longer burr and to clean up the insides.

TDI-JAY · Apr 10, 2014

Strange looking downpipe flange but great looking welds!

JFettig · Apr 10, 2014

Thanks Jay! Those DSM flanges are odd looking for sure. I went with that exhaust housing so it would fit in the engine bay!

Paulinski · Apr 10, 2014

LoL

I'm a dumbass. I just realized its for the green show car Passat.

Keep up great work Jon.

TDIsyncro · Apr 12, 2014

added a 5 star vote for one of the best TDI street compound turbo set-ups I have seen. nice work.

I wish it was on a PD, but look forward to seeing what you can do on the ALH.

JFettig · Apr 12, 2014

Thanks Louis!
I still have that PD130 I'm slowly working on

Only worked part day yesterday because it was so nice out so I worked on the car.

Downpipe pretty much done:

modded a spare valve cover for -10AN CCV port.

JFettig · Apr 12, 2014

better pic, now with CCV hose.

danielhf · Apr 14, 2014

This is looking really great. Can't wait to see this running. Fantastic welding.

storx · Apr 14, 2014

Awesome work John, cant wait to see it running.. and showing off your hard work.

JasonCzerak · Apr 14, 2014

looking good jon!

Satiro · Apr 15, 2014

What a good idea. That valve cover looks awesome. Nice doing!

duwem · Apr 17, 2014

One month till Door Country Cruise, looking good man!

glitdi · Apr 18, 2014

John.. I dont know what I like better your machining skills or your welding skills.. either way both are amazing!
Are you planning on using the "smart sensor" portion of the vane actuator on your hp turbo? Just noticed its still kicking around...

JFettig · Apr 18, 2014

Thanks

The smart sensor came stock on that turbo and they aren't available without, It won't get plugged into anything.

slug1121 · May 22, 2014

Well.... How does it move and shake!?!?!?!?

JFettig · May 22, 2014

Since my last post I dropped the trans and swapped oil pans but nothing else so far. I have a 24lb 240mm flywheel and 8 puck ceramic disk to go in when I find time. I forgot I needed to replace my pilot bearing - just got that in.

It will probably be a week or two until I get a chance to put some time into it.

JFettig · Jul 7, 2014

Progress has been made over the past month, not a significant amount - which is sad because I probably only have 10 hours of wrenching/fabbing at most left to do.

Had to make a new battery cable, the old one was ratty and ran right next to one of the turbos

Filled a new trans mount because the old one just can't do the job

Took up some gap in the snub mount to stiffen it all up

Did lots of other stuff like install a metal slave and new master, etc.
Here is how it sat last night

duwem · Jul 7, 2014

Awesome, I was just thinking yesterday I should dig this thread up and bump it to see whats going on. Keep us posted!

Paulinski · Jul 7, 2014

Thanks for the update Jon.

andy2 · Jul 7, 2014

Glad to see progress.

LSSBoy · Jul 8, 2014

Cool, for what application is the bung in the downpipe ?

JFettig · Jul 8, 2014

The first one is for the wideband O2 sensor, second one is crank case scavenger

LSSBoy · Jul 8, 2014

That is what i thought, but, wideband on a gazer ok I understand but on a diesel I dont see how it would be useful ?

ryanp · Jul 9, 2014

wideband is perfect for TDi fine tuning!

JFettig · Jul 9, 2014

Made some progress tonight. I'll only have tomorrow to work on it until probably Tuesday. I could probably push to start it tomorrow but I'd rather button up things nicely so it'll wait until next week since I'll be busy all weekend.

Finished the downpipe tonight:

What a pain that was to connect 2 ends so close together with the car on jackstands. I don't know how Whitbread does so many of these!

All welded up:

Connected to the top half of the downpipe:

Good shot of how the wastegate is nicely accessible.

Tomorrow I make my double banjo bolt as well as my drive pressure adapter that will plug into the BV43 using the EGT port and a oil pan drain plug. I'm skipping the EGT probe for now. I might install one once I start cranking it up.

duwem · Jul 10, 2014

Dat Downpipe

So do you use a standard gasoline wide band sensor and reader like an AFX or Innovate, or are they special for Diesel?

What kind of air/fuel ratio are you looking for for crusing and hard acceleration?

JFettig · Jul 10, 2014

Its a Bosch LSU4.2 widband which is pretty much standard. Its an Innovate MTX-L gauge, it'll read to 99:1 AFR. There is a Bosch wideband sensor that is diesel specific but it doesn't seem to be available with any gauges or anything from what I found.

The readings are whatever you want them to be

I tuned my previous setup to cruise just under 30:1 AFR and WOT at 17:1 AFR. I'm not sure I'll be able to get it down to 30:1 cruising with compounds but that will be my goal to keep it under for the least amount of exhaust back pressure which helps mileage.

I have all my sensors fed into a data acquisition system so I can log boost(hp, and lp), exhaust pressure, intake temps, wideband, etc.

Compounds for the Passat

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