Hanks URQ 2.6L Autopsy

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Hank
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Post by Hank »

Yes Myke. It is a reasonable question. Thing is, at idle, it is not as bad as 3k... I abuse the motor a bit and get it to put out hte usual lifter symphony. I think a couple of them are just bum lifters at this point. Either that or 034 casted a spell on my motor knowing I promised myself I would put a new cam gear on it next time the head came off!
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PRA4WX
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Post by PRA4WX »

Mufflers?! Who needs mufflers? That's what a turbo is for! :wink: Hank, did you stay with a steel downpipe?
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Hank
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Post by Hank »

Yes, A stainless downpipe that terminates behind the axle with a flex coupler
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PRA4WX
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Post by PRA4WX »

Think the aluminum wouldn't be up to downpipe temps?
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Hank
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Post by Hank »

I know that drag guys use them all the time, but I do not ever see them on road cars at all. I see 1200 out of the turbo all the time, which is right at aluminums Melting temp depending on the grade. At the bottom of the dp, the wideband see's 800 at WOT, and that is the gas stream. It will start to get soft around 1000C, and I think it would have to be a texas mile type situation to even dream of being a problem down there.

The interesting thing with the new setup, the exhaust itself is very cool when compared to the old steel setup, but the exhaust tips get pretty toasty after running hard. The aluminum absorbs a tremendous amount of heat.
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quattro87
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Post by quattro87 »

UUUgggh That exhaust sounds good compared to the lifter noise. That's a bummer. Like Myke says, you sure youre getting oil up there?
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RSCoupe

Post by RSCoupe »

ShavedQuattro wrote:...I used a head with 700 miles on the rebuild including lightweight lifters. There seems to be a huge clamor of clank coming from that area. Has anybody had them be bad nearly out of the bag? I am stumped. I will probably swap them out for my old lifters to see if that solves it...


I had 2 or 3 bad out of my initial 20 (also lightweight). Replaced them and everything was fine.
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Quattro v1.0
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Post by Quattro v1.0 »

How in the heck can you pinpoint the bad ones? yikes

Hank, have you had the car up to full temp and under load? i have see instances where they dont quiet down until the thermostat on the oil opens up...
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Hank
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Post by Hank »

quattro v1.0 wrote:[/quote]
How in the heck can you pinpoint the bad ones? yikes

.[/quote]

:stupid: :stupid:

Will a benchtop pressing of them reveal the pooper?
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RSCoupe

Post by RSCoupe »

For mine, I could compress them by hand (finger), an 1/8" give or take, whereas the good ones wouldn't budge.


Bad one:

Image
Image
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PRA4WX
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Post by PRA4WX »

RSCoupe wrote:
ShavedQuattro wrote:...I used a head with 700 miles on the rebuild including lightweight lifters. There seems to be a huge clamor of clank coming from that area. Has anybody had them be bad nearly out of the bag? I am stumped. I will probably swap them out for my old lifters to see if that solves it...


I had 2 or 3 bad out of my initial 20 (also lightweight). Replaced them and everything was fine.


WHAT?!! Is this a common occurance with the LW vag lifters?
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loxxrider
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Post by loxxrider »

I've heard of this too actually
-Chris

'91 Audi 200 20v - Revver/BAT project
'91 Audi 200 20v Avant
'01 Anthracite M5
'90 M3
'85 Euro 635csi
'12 X3
E34 530i (maybe rear-mount soon)
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Hank
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Post by Hank »

Lifter tick has actually gone down quite a bit. I think there are a couple of them that are faulty. I'll probably order some and tear it down to fine the bad ones..

HTA 35r plus e85 plus 26psi is fun!!!! I am getting a misfire up there though, and I am thinking it is ignition related.
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85oceanic
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Post by 85oceanic »

:woowoo: Lookin good! I hope the lifter noise goes away, or is easily fixed!!! Sounds great Hank!!!
-Ben-
Image
-1985 Audi 4kq: Xona 7164 AAN 488whp- -2009 Audi A4 -
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audifreakjim

Post by audifreakjim »

ShavedQuattro wrote:Lifter tick has actually gone down quite a bit. I think there are a couple of them that are faulty. I'll probably order some and tear it down to fine the bad ones..

HTA 35r plus e85 plus 26psi is fun!!!! I am getting a misfire up there though, and I am thinking it is ignition related.


Mine took forever to quite down. BTW, I hate you and your E85.
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Quattro v1.0
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Post by Quattro v1.0 »

26 PSI ?!?!? c'mon Hank BREATHE on that thing ;o)
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quattro87
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Post by quattro87 »

He can't.....wants his new/used torsen 016 to last at least 500 miles. :wink: I'm going up there this weekend and he has offered to let me go "thrash it" some. I hope he already has the 500 on it by then. :P
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Quattro v1.0
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Post by Quattro v1.0 »

Well, just so that cams aren't out on the bench when you get there it'll all be good. It's not like you have to get even with him for breaking any of your stuff right?
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Hank
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Post by Hank »

uhhh... 4kq axles are just not going to hack it in the rear.... I'll load a picture tomarrow, but they are a little twisty.

I am getting a bad miss at 24psi though. It is only boost sensitive, as the trigger is rock solid to 8500. I changed plugs, upped the dwell as much as I could ( about 80% Duty Cycle, dunno if that is safe or not), and looked extensively at timing to make sure it wasnt a bad miss. I wish I had a new set of coils on hand to check. I'll have to see what the resistance is on them. WHat is the resistance suppose to be?

I love torsen with locked rears, and a fast rack. It is nice to be able to shift mid slide with out having to have a second hand on the wheel.
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Quattro v1.0
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Post by Quattro v1.0 »

i wanted to hear about the rear axles and your swap... What your Dad was telling me about it just didn't seem normal from all the 4k diff swaps I had heard of - including the one in my car...
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Audilard
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Post by Audilard »

Uh. Why is there no video of this supposed 26 psi and E85?!?!?

Prove it!!! :D
Darin
1989 80 20vt
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Hank
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Post by Hank »

Nothing special. The 4kq rear diff is back there with the 4kq rear axles. The shaft does not look any different from the URQ Shafts, but the CV's are obviously smaller.
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ralleyquattro
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Post by ralleyquattro »

ShavedQuattro wrote:I love torsen with locked rears, and a fast rack. It is nice to be able to shift mid slide with out having to have a second hand on the wheel.


Isn't that just the best? You can get some nice powerslides with that setup. Miss it so much!
Martin Pajak

http://www.quattro.ca

82 Audi Ur-q, SQ project
83 Audi 80 q, Euro 2-Door
85 Audi Ur-q, Euro mit 3B
91 Coupe Quattro
93 Audi 80 q Avant, 2.5 TDI with 6-speed
04 Audi A4 1.8Tq Avant USP 6-speed
04 Audi A4 3.0q Avant USP 6-speed
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Hank
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Post by Hank »

yes it is Martin :) I am thinking perhaps a torsen rear would be more friendly on half shafts..
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Quattro v1.0
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Post by Quattro v1.0 »

ShavedQuattro wrote:Nothing special. The 4kq rear diff is back there with the 4kq rear axles. The shaft does not look any different from the URQ Shafts, but the CV's are obviously smaller.


That is the part that makes me scratch my head. I had always thought that you just swapped out the diff flanges from 4k to the larger UrQ / 5k like when you do the tranny swap. Then you continue to run the original axle / CV combination...

So, I guess Im now wondering what is under my car since it has 4:11's...
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