Project #7 from Jason: 12 valve VR6 Half Build.

[jakeru]

I see an old VR6 "crackpipe". I used to have a Passat VR6, and remembered some sort of problems with that on mine, source of a coolant leak. I think a previous mechanic got lazy and didn't clean the bore where the crack pipe o-ring seated. I think I just cleaned it all up, put in a new crackpipe and o-ring and problem was solved.

Question - how do you like the air hose rotator I see you have attached to a couple of your air tools? I've been thinking of getting something like it for my die grinders. And maybe a light, flexible air hose "whip" on the end to make it even less cumbersome.

[Jason]

@morgaj: I didn't take them out at all. I didn't even drop the pan as the plan was top end now and then I will do the bottom later. Bump in compression is from a thinner HG. This car is a MK3 which had a different material gasket than the newer model MK4. Using the MK4 HG bumps the compression and with chip has shown ~8WHP.

@jakeru: I found that there are quite a few people on here that know VW's You are correct that the coolant pipe in that pic is old. I replaced it with both o-rings but did not take a picture with the new one on. As to the swivel ends, I gotta say I do like them. I didn't use one on the silver grinder and did on the black one. I do like having them better as the hose hangs and is less of a pain.

[Jason]

I have not mentioned the new plans for this car yet so here we go.. The N/A build was only temp as I mentioned before and the end goal is to build the bottom end and go turbo. Well that process is now in the works.. Parts collection time...

GTX3582R with Tial .82a/r
3.0L 9:1 JE Forged Pistons
Integrated Engineering Forged H Beam rods
Coated rob bearings (already coated mains)
Tial 38mm MVS wastegate
Tial 50mm QR BOV


Integrated Engineering Surge Tank
Bosch 044 Fuel Pump
630cc Injectors
Oil Feed/Return Lines/Fittings


CM FX400 6 Puck Clutch


Going to run this on Megasquirt 3/3x Standalone. Still need the MS3/3x, Innovate MTX-L wideband, silicon coolant hoses, Metal coolant pipe, gaskets, and intercooler. Thinking about going air/water..

Should make for a nice ~500whp daily driver.

And a more recent pic other than it has the plug wires off.. I finished the upper manifold and such..


Fitted AN fittings for my catch can

[sportbike]

He said he tried two other sensors. Now he is kind of out of ideas, unless it is the MS box itself. He had a wild ### idea that the crank may have become magnetized, but I've never experiences that.

[breakneckmot]

Absolutely awesome build!

[its_34]

Nice work! The MS wiring harness looks like a nightmare but you seem to have a methodical approach. Good notes go a long way to diagnosing issues down the road.

Does the MS read direct from a lambda sensor or does it take an output from the Innovate?

[Jason]

First off, I will answer the lamda question. The Innovate wide band was put in place of my factory sensor. When running the wideband, it has a harness that actually goes to a plug on the guage. The wideband controller is built into the guage. Now the nice thing about this was it has 2 analog outputs but they are off the back of the controller. I have one wired to the MS harness and wired the other to the factory harness where the factory sensor plugged in. I actually clipped the wires from the back of the sensor and then wired the wideband output (one of the red wires) to the signal wire of the factory sensor plug. This means the wideband will provide both the factory ECU and the MS. This has made troubleshooting more efficient and reasonable. I just swap the factory plug and hook up the vacuum line and plug in the MS.. If you notice the pink wire in the pic with the MS, that is the lamda wire for the MS which then has a tad bit of a loop hanging down in the pic of kyle plugging into the relay panel.

Now on to the update.... I switched from using the MS3 to control the idle valve to using the MS3x Idle control and realized I had hooked up ms3/28 but not to vw pin 23. I ran ms3/28 over to the the ign switch leg of the terminal block off the relay panel. After switching to the MS3x Idle control, it still was not working out. That night I tried all kinds of PWM setting but couldn't seem to get an idle at all. Last night we were at it again and right off I re calibrated the TPS, Changed my required fuel value, and make a complete change to the fuel ve table. The coolant temp was 137 at this point but I decided to turn the key anyways and sure enough it fired right up and idled.

Now on to the next wave of steps. My idle is a tad high (100 - 150 RPM) so I need to figure out whats up with that. On to the next step, it acts like there is a fuel cut at 2200RPM when just reving it. Idle is sitting at a pretty steady 14.4 with minimal fluctuation of up to maybe 14.7. The final minor issue currently is the AFR guage in MS is .4 higher than the innovate AFR guage but I have a pretty sure cause for this and I just need to fix it. In most MS installs, they say to ground the MS to the engine. I grounded it at the battery which I believe is still ok. The issue is that I grounded the Innovate under the dash which they tend to show the difference when not grounded at the engine. I will actually move the ground to the battery where the MS is but highly considering the switch to a ground terminal block by the battery with a single short 12GA wire to the battery. Either way I believe that grounding the Innovate at the same location as the MS will take care of the output difference. Finally after these things are worked out, it will be time to tune the cruise followed by WOT tunning. and then the fine tunning will follow it. I will post some pictures later once I get them online.