Marc's 1990 4.2L V8 Twin Turbo Coupe Quattro

quattrofrog · Post by **quattrofrog** » Sat Jan 24, 2009 5:24 pm

Hey Marc... Are your turbochargers are supported from beneath by braces or just by the manifolds? I can't remember how you have it configured.

Post by **Marc** » Sat Jan 24, 2009 5:43 pm

Wizard-of-OD wrote:Marc you going to eliminate that idler pulley up front?

I haven't had any more problems with blowing up serp belts but I would like to get rid of the top roller. In theory all I should need is a straight shot between the crank pulley and the alternator with some sort of spring loaded tension roller pushing in the back side of the belt to keep it tensioned, essentially eliminating the pulley that used to be used for the viscous fan.

Post by **Marc** » Sat Jan 24, 2009 5:43 pm

quattrofrog wrote:Hey Marc... Are your turbochargers are supported from beneath by braces or just by the manifolds? I can't remember how you have it configured.

just the manifolds. They are so short I really dont think bracing is necessary.

RSCoupe · Post by **RSCoupe** » Sat Jan 24, 2009 6:45 pm

a4kquattro wrote:yeah, when you track high HP turbos the heat and vibration plays hell on the fasteners. I used high temp loctite on the fasteners, in this case it was the studs securing the turbo to the manifold that started to back out (the nuts were still securely in place). next step is some nice mechanical locking tabs I seem to recall seeing in the 034 motorsport catalog

Definitely. I had to use the locking tabs on mine, as it was the only way to keep the hardware tight. It would only take a couple sessions and it would be loose, and the gasket would be burned out.
http://www.034motorsport.com/product_in ... ts_id=1329

Post by **Marc** » Sun Jan 25, 2009 11:47 am

engine is out, car is pushed outside so I can keep the doors closed and swap some of the custom parts off the 3.6 onto the 4.2. Parts I will be swapping include:

oil pan (clearanced for the subframe)
crank pulley (60-2)
t-belt covers (powdercoated)
valve covers (powdercoated)
exhaust manifolds/turbos (duh)

I'll need to drill some holes in the 4.2 block while I've got the pan off for the turbo drains as well as some new provisions for catch can drain back...

AudiSport4000 · Post by **AudiSport4000** » Sun Jan 25, 2009 11:53 am

:woowoo: :woowoo: :woowoo: :woowoo:

Derracuda · Post by **Derracuda** » Sun Jan 25, 2009 12:02 pm

Jonathan · Post by **Jonathan** » Sun Jan 25, 2009 12:22 pm

Marc,

You get the MG prize for "together again, apart again."

RSCoupe · Post by **RSCoupe** » Sun Jan 25, 2009 1:09 pm

:woowoo:

Zzak · Post by **Zzak** » Sun Jan 25, 2009 2:23 pm

Ok you motivated me to pull the 2 VEMS harness wires thru my firewall so there. Now I'm getting some whiskey to warm me up.

Post by **Marc** » Sun Jan 25, 2009 2:39 pm

Zzak wrote:Ok you motivated me to pull the 2 VEMS harness wires thru my firewall so there. Now I'm getting some whiskey to warm me up.

ooh. thats a good idea. off to the booze cabinet I go!

3bAudios · Post by **3bAudios** » Sun Jan 25, 2009 3:21 pm

:woowoo: nice going Marc i take it it warmed up enough to get a little work done, nice

Post by **HT Motorsport** » Sun Jan 25, 2009 4:13 pm

Very cool, well cold really

Nice work Mark, cant wait to find out more. :woowoo:

onfir3 · Post by **onfir3** » Tue Jan 27, 2009 9:08 pm

Holy hell, that motor is dead sexy. I've got to say, that's pretty sharp.
So, I'm really tired right now, but I'll read through this at a later time.
What's the status? Getting it ready to go in and all? Does it run?
feel free to :bashtard: me later.

Derracuda · Post by **Derracuda** » Tue Jan 27, 2009 9:28 pm

RS6 on the cheap!

WAUG0806 · Post by **WAUG0806** » Tue Jan 27, 2009 9:44 pm

derracuda wrote:RS6 on the cheap!

RS6 on a diet...

Post by **Marc** » Tue Jan 27, 2009 11:01 pm

WAUG0806 wrote:
derracuda wrote:RS6 on the cheap!

RS6 on a diet...

Coupe is still a pig, 400whp takes care of that nicely.

I'm hoping for 500whp on pump with the 4.2, possibly 600 on E85 :-D

Post by **Marc** » Sun Feb 01, 2009 9:54 pm

put the engine up on a stand tonight:

pulled the lower and upper oil pans, since those will be swapped onto the 4.2

next up is to lift the 4.2 off the ground and pull the upper and lower pans, drill the oil return lines into the engine block, as well as a yet to be determined catch can drain back hole.

man alive there are a lot of oil pan bolts on these things.

Toxcheap · Post by **Toxcheap** » Sun Feb 01, 2009 11:41 pm

good work and all that stuff

Post by **HT Motorsport** » Mon Feb 02, 2009 7:25 am

Toxcheap wrote:good work and all that stuff

Aye, garage is looking sorted too

Post by **Marc** » Mon Feb 02, 2009 7:30 am

timmmy wrote:
Toxcheap wrote:good work and all that stuff

Aye, garage is looking sorted too

says the man with a monster sized garage. Asshat

Toxcheap · Post by **Toxcheap** » Mon Feb 02, 2009 7:30 am

timmmy wrote:
Toxcheap wrote:good work and all that stuff

Aye, garage is looking sorted too

HAHAHA!!
At least this time I don't have to see it in person, although right now I can't talk my garage is a war zone with absolutely no free space to work. :(

RSCoupe · Post by **RSCoupe** » Mon Feb 02, 2009 8:01 am

a4kquattro wrote:
timmmy wrote:
Toxcheap wrote:good work and all that stuff

Aye, garage is looking sorted too

says the man with a monster sized garage. Asshat

WAUG0806 · Post by **WAUG0806** » Mon Feb 02, 2009 8:30 am

Good to see you back at it!

I spent 16+ hours straightening up my huge garage mess this weekend... parting cars a very messy proposition and another incoming orphan soon... lots of energy and did not touch a car.

Post by **Marc** » Wed Mar 04, 2009 7:47 pm

life has been busy lately.

Closing on my house the 16th of this month (fingers crossed). I did manage to sneak out to the garage tonight to tighten the oil pan bolts for the swapped mid and lower oil pans (all eleventy billion of them).

Next up is R&Ring the waterpump and idler rollers and installing some new seals, swapping over the powdercoated timing belt rear cover plates for the heads, then install the t-belt..