Marc's 1990 4.2L V8 Twin Turbo Coupe Quattro

Post by **HT Motorsport** » Fri Feb 01, 2008 9:07 pm

SO Mark and I chatted about the little squares and we thought the best explanation was that Audi found the bolts for the head galled the casting so they drilled a bunch of little holes and pressed in some square rod stock of something really hard to stop the galling. What do you think?

Nice work Mark, keep up the research for me and Ill see you at the shop tomorrow.

Post by **Marc** » Sat Feb 02, 2008 7:35 am

lemme know what time you plan on being over there

Post by **Marc** » Sat Feb 02, 2008 4:15 pm

Finished up stripping the heads down at the shop today:

Haydn built a nice 'special tool' for removing the valve stem oil seals, works perfect

I did manage to misplace one keeper though, no biggie, I'll order a pair from the dealer.

While we were there some of the locals were having some fun at the shooting range so me and Haydn stopped by, we fired off a few rounds, too bad I cant hit the broad side of a barn. The shotgun did the trick though

Now that we're getting WAY off the track of my thread, here's a shot of "the kids" at home, along with Dan's BMW that I'm working on:

mjlangley · Post by **mjlangley** » Sat Feb 02, 2008 6:06 pm

[quote="timmmy"]SO Mark and I chatted about the little squares and we thought the best explanation was that Audi found the bolts for the head galled the casting so they drilled a bunch of little holes and pressed in some square rod stock of something really hard to stop the galling. What do you think?quote]

Perhaps there are set around each head bolt boss to prevent the clamp load from distorting the head. If they protrude from the surface, perhaps they allow oil under the bolt heads to prevent galling like you mentioned.

Either way, its elaborate manufacturing if they are there on purpose...

Post by **Marc** » Sat Feb 02, 2008 10:27 pm

some weapons of war arrived tonight

time for some port and polish work soon I think

Post by **HT Motorsport** » Sat Feb 02, 2008 10:41 pm

Schweeeet... see you in 3 weeks then

H

Wizard-of-OD · Post by **Wizard-of-OD** » Sat Feb 02, 2008 10:42 pm

Whats your plans for the intake manifold Marc?

yodasfro · Post by **yodasfro** » Sat Feb 02, 2008 10:54 pm

Wizard-of-OD wrote:Whats your plans for the intake manifold Marc?

I heard him say something about one of these.

Attachment ( 10372 ) : 28e8ae8Laminova_edited.jpg

Post by **Marc** » Tue Feb 05, 2008 8:19 pm

got the valves yesterday

My local engine shop apparently just got a flow bench (from their website it looks like they have a superflow SF-600):

http://www.superflow.com/flowbenches/index_316.cfm

I may swing by tomorrow or Thursday to figure out how to use it on my 4.2 heads :-D

Toxcheap · Post by **Toxcheap** » Tue Feb 05, 2008 8:25 pm

a4kquattro wrote:got the valves yesterday

My local engine shop apparently just got a flow bench (from their website it looks like they have a superflow SF-600):

http://www.superflow.com/flowbenches/index_316.cfm

I may swing by tomorrow or Thursday to figure out how to use it on my 4.2 heads :-D

Did it also come with an employee with 10 years experience using it?
If you only want to compare the change in valves fine. But porting a head with a flow bench is another story. At that point the flow bench is only useful with an experienced porter.

Post by **Marc** » Tue Feb 05, 2008 8:35 pm

Toxcheap wrote:
a4kquattro wrote:got the valves yesterday

My local engine shop apparently just got a flow bench (from their website it looks like they have a superflow SF-600):

http://www.superflow.com/flowbenches/index_316.cfm

I may swing by tomorrow or Thursday to figure out how to use it on my 4.2 heads :-D

Did it also come with an employee with 10 years experience using it?
If you only want to compare the change in valves fine. But porting a head with a flow bench is another story. At that point the flow bench is only useful with an experienced porter.

The whole point of using a flow bench is to figure out if your port work produced an improvement, definitely. Even if I suck at it, I look forward to playing with it.

Toxcheap · Post by **Toxcheap** » Tue Feb 05, 2008 9:26 pm

Yeah... good luck with that

Post by **Marc** » Sat Feb 09, 2008 5:16 pm

pulled the coupe into the garage today to start the tranny swap. Wanted to do it on a lift but got impatient due to the semi-warm weather today

Its pretty much ready to drop, just have to take out the bolts on the tie rod bracket and should be good to go. I decided to pull the front struts while I was at it so I can install the KWs and return poor Peter's suspension!

Post by **Hank** » Sun Feb 10, 2008 12:39 am

woot woot

AudiSport4000 · Post by **AudiSport4000** » Sun Feb 10, 2008 8:13 am

:stupid:

GTIVR62801 · Post by **GTIVR62801** » Sun Feb 10, 2008 10:54 am

Is it going to be ready for the track this year Marc? 8)

Post by **Marc** » Sun Feb 10, 2008 12:34 pm

GTIVR62801 wrote:Is it going to be ready for the track this year Marc? 8)

certainly. I'd really like to run the glen with the coupe this year.

update: tranny is out.

side by side shot of the 01A vs 01E. 01E is bigger in pretty much every dimension:

I will need to stop by Haydn's shop to cut some steel for the mounting arms. Also need to steal the clutch fork from his 01E as mine didn't come with one and its different from the 01A, specifically at the point it pivots at the bottom:

01E:

01A:

3bAudios · Post by **3bAudios** » Sun Feb 10, 2008 1:10 pm

looking good Marc, keep on truckin.....im looking forward to another ride with the 4.2 and the 6 spd :woowoo:

RS · Post by RS » Sun Feb 10, 2008 2:20 pm

I got two extra 01E clutch forks on my spare trannys if Haydn seems unwilling to secumb to your pilfering. You know where to find them if you need them.

Post by **Marc** » Sun Feb 10, 2008 3:35 pm

RS wrote:I got two extra 01E clutch forks on my spare trannys if Haydn seems unwilling to secumb to your pilfering. You know where to find them if you need them.

I'll take you up on that offer for sure. Let me know your shop schedule

audifreakjim · Post by **audifreakjim** » Sun Feb 10, 2008 8:03 pm

Thanks for the detail on the clutch Marc, RS, YGPM.

Post by **Marc** » Tue Feb 12, 2008 9:18 pm

Bolted up the 01E today so I can start mocking up the mounts. Used a pair of floor jacks to get it in position. right now the rear of the tranny is being held where I want it with a jack stand:

some detail on the left and right side mounting locations:

CQ linkage vs. 2.7t S4 (I think Rube Goldberg was involved in the design process):

mounting holes are the same on the shifter box though, so it looks like it will bolt right on

(I wonder if Chris tagged it in enough places :-P )

While I was in there I pulled the clutch and flywheel as I'll be installing an OE v8 5 speed flywheel and upgraded clutch as I seem to be on the edge of the spec stage 3+:

Remember when I had that issue with the starter teeth catching on the aluminum flywheel? well it turns out the factory actually turned down the area behind the starter teeth on the OE piece:

I think the clutch and pressure plate are definitely still usable so I might put them up for sale

Now, question time. Since the 01E doesn't have a provision for the proconten cable, is there any reason I shouldn't unbolt the brackets from the body (EG, do they stiffen the frame rails or anything crazy like that?):

90quattrocoupe · Post by **90quattrocoupe** » Tue Feb 12, 2008 9:32 pm

No, the procon brackets do nothing to reinforce anything. I removed mine when the 6 speed was done. It is a lot easier with the trans out than trying to remove them later.

Greg W.

WAUG0806 · Post by **WAUG0806** » Tue Feb 12, 2008 9:33 pm

I just removed the passenger side procon cable from my CQ... ran the battery cable through the grommet and used the fastners along the sill to route cable back to the trunk... brackets don't look like they do much except add mass and make things harder to work on so mine are coming off...

Post by **Marc** » Fri Feb 15, 2008 8:31 pm

Didn't really feel like working today so only put in about a half day before heading out to the garage. Really wanted to make some headway on the mounts (which was made easy with Haydn's Plasma Cutter :thanks:)

Started life as bits of cardboard:

then moved my way to metal

I might try to powdercoat them this weekend, then all I need to do is go pick up some appropriate length hardware. (my stainless supplies are running low, time for another order)

dont think I ever posted pics of the pistons/head post cleanup, so... :

I'm gonna call my local machine shop monday to get a baseline flowbench test and then go back when I've finished with the new valves/guides/port work and see what the change is.