Pat's 1990 CQ - AAN / GT3071R / VEMS

[Afterthought]

Well got the car running again, have everything from the AAN harness tied into gauges and whatnot except the oil pressure switch, it appears I need a different type of switch. Will see about that.

Installed the VEMS ecu, connectors, wideband 02 sensor and round gauge.
Had to go get a serial to USB cable so I wont be able to try and start the car until tomorrow with that.

[Afterthought]

Well screw it. Got ancy and went out to the shop. Put new spark plugs in real quick and fired her up on the VEMS V3 ecu.
This is what the plugs that were in there looked like:

I am anxious to actually go for a drive and get acquainted with the VEMStune software. Still havent driven the car yet and I have lots of interior to put back together. Looks like ill have to go for a drive tomorrow.

[AudiQuattros]

And why intercooler painted black ?

[Afterthought]

And why intercooler painted black ?

So it doesn't stick out so much.

[88a5tq]

Won't that decrease it's effectiveness?

[Afterthought]

Won't that decrease it's effectiveness?

Not really. I think you would be splitting hairs at this point, but the amount of heat exchange that would be lost by the thickness of the paint would be minuscule if even measurable (if that is what you're referring to).
The intercooler is not only exchanging heat on the front surface of the fins, it also happens as the air travels through the core, especially one with a thick core like this.

[Afterthought]

not sure you can consider this an end all be all study, but these guys did not show an increase in Delta P across the intercooler after painting.

But like I was saying I think it would be splitting hairs at this point

[vt10vt]

SCC also did tests like 10yrs ago on painted intercoolers as well, both with 'intercooler paint' and regular old Krylon, and found no measurable drop in efficiency or effectiveness.

[ringbearer]

Smokey Yunick Believed a thin coat of flat black helped dump heat.

[Afterthought]

Smokey Yunick Believed a thin coat of flat black helped dump heat.

Black probably does exchange heat better.
In any case im not going to worry about the color of the intercooler for now, I have to get the car running well!
Went for a drive with the VEMS V3 PNP ECU installed, did some logging , and the car is running pretty rich but running, which is whats important.
Hopefully I can get some time to start doing some tuning in the next couple of weeks.

[scubagli]

http://youtu.be/z_mmmXTbLP0
Pretty cool...

[Afterthought]

http://youtu.be/z_mmmXTbLP0
Pretty cool...

Interesting. I noticed on YouTube of course there are arguments to support both sides of that discussion. For me, The reality of it is there are alot of things I see that will affect the IAT's more than paint on the intercooler.

[scubagli]

Yeah I ran my Tdi front mount for years painted black...not to worried about it...

[Afterthought]

Little progress recently but working on getting the car all the way together.


This is what the headlight wiring looked like when I got the car. Working on getting the headlights going. I hate wiring. This is how it looked when i got the car... One of them doesn't work and one is missing a resistor for the blinker. These are RS2's that were installed and at a later point some HID's were added to them. Will have to see if I can find the diagram for RS2's into a B3 car.

[the german]

um, wow. Is that a wire nut?!

Wiring for lights is simple- just the same any B4. Do your lights have adjuster motors with them?

[Afterthought]

um, wow. Is that a wire nut?!

Wiring for lights is simple- just the same any B4. Do your lights have adjuster motors with them?

Yes sir... A wire nut!

The HID's do have levelers/ballasts (If thats what youre referring to? I'm not strong on headlights and electrical)
Did you run your blinkers in the Rs2 headlights? I also could relocate now to the porsche blinkers if i want to. Maybe I wont need a resistor then, but well see.

[Afterthought]

Made it ~ 2 blocks yesterday before having to pull over to the side of the road and fix something
Did a quick 2nd gear pull at moderate throttle to see how the wastegate handles the boost (and just for kicks since ive been working on this car for a year and a half now and never been able to get on it once)
Blew off a hose. Re-attached hose with the wrong sized screwdriver that I had available.
got on it again, throttle stuck ~4,500 RPM idle. Not sure what caused this but I will be re-adjusting and looking at the stops and mechanical side of the throttle body/potentiometer today than do a test WITH laptop this time and log what I get for throttle output, etc.

[the german]

And the troubleshooting + tuning begins!

For the headlights I got rid of my HIDs and went with the stock H4 bulbs. Looks like you have b4 connectors on there already so you should be able to easily rip all that sketchy HID wiring out and go back to halogen bulbs quite easily.

I switched to rs2 turns in the front bumper- stock connector and bulb socket plugs right in, no modification necessary.

[Afterthought]

And the troubleshooting + tuning begins!

For the headlights I got rid of my HIDs and went with the stock H4 bulbs. Looks like you have b4 connectors on there already so you should be able to easily rip all that sketchy HID wiring out and go back to halogen bulbs quite easily.

I switched to rs2 turns in the front bumper- stock connector and bulb socket plugs right in, no modification necessary.

As far as the headlights I think your plan is the best, retain my b4 plugs and go halogen now so I can just have lights and focus on other things!

Yep, troubleshooting time. Went for a quick drive yesterday with laptop and of course wasnt able to duplicate that issue a single time. Did notice the car is boosting higher than it should be and I am showing no duty cycle for N75 boost control valve on the log.
As a next step, I am going to try disconnecting the N75 plug from ECU and run the car, see if it still builds too much boost (per this article: http://forums.quattroworld.com/s4s6/msgs/20987.phtml)

I think I remember that donor car's ECU was chipped and its also likely the spring that was in my wastegate was not stock. Dont know if it's the "1.9 "or "2.2 bar". either way, with no N75 cuty cycle, I should be seeing the wastegate open ~13.5# or 17.5# If I am thinking about this correctly, which it is not doing.

I

[Afterthought]

more progress on the CQ.
Insalled the EFI express LS2 coil kit. Super happy with this kit (the quality, instructions, fast shipping etc)and everything else Ive purchased with them.
Before:


Had to relocate the catch can to the drivers side of the engine bay. Im pretty sure it should be larger as well.
Probably going to make a bigger one.


Started putting the front end together the rest of the way. Test fitted the fogs and stuff. Not gonna leave those white..

[jobbo]

Nice

[mushasho]

Virgin wastegate!

Sent from my HTC One using Tapatalk

[Afterthought]

Virgin wastegate!

Sent from my HTC One using Tapatalk

Ha... You mean the fact that it hasn't had that hole drilled in the top yet?
It does have a stiffer spring in it so it's not a virgin anymore!

Got my headlight issue solved finally. The power for those HID's had been pulled from the parking light.
Found a real nice Relayed and fused HID power supply harness from VLEDs (local vendor) for only $30. Installed that, returned my factory plugs to how they should be, removed all wire nuts. Installed Porsche turn signals and wired the blinkers into there. Nice thing about those signals is they use a bigger bulb so the resistor is not needed.

[Afterthought]

Finally got out on the road to do some tuning today. Attached a log in case anyone gets bored and wants to take a look.

[mushasho]

2600-3200 rpm is lil lean... perhaps that's your "cruising"/"eco" range... any full throttle logs?