Chris' 200 20v Avant - RENNWGN - Blowed Up

[PRY4SNO]

Unrelated to blowed up head stuff,
any clue where to find a good used or remanned urs4 compressor that doesn't cost an arm and a leg?

Pm inbound

[loxxrider]

No word on the head parts so far, and not sure about rods either. Pistons are OK, no signs of det, but Marc says the stock gaskets can let go even at the slightest sign of it, so it's not totally ruled out. Doesn't matter though becuase it will have a dyno tune when this is done anyway.

They did find something else interesting though. Someone here or on fb was talking about finding pieces of the valve cover plastic splash shield in their sump. I have always been leery of those things and was actually thinking of removing it next time I had the vc off (like I did on my sedan). Well, they found pieces of that clogging the oil pickup and scoring on the big end bearings, so it's likely that it would have spun a bearing soon anyway. So whether the gasket let go or not, this would have had to happen! Now I don't have to feel guilty about putting the efr on and blowing it up lol.

[Aktapod]

Hmmmmm... that happened to me a while ago. So I guess I'm due to verify Marc's findings when my engine explodes.

But seriously, it'll be nice to have the peace of mind that your engine is well-sorted now that it doesn't have the rods as a weak-point. Plus you can get rid of that stock paper filter!

[88a5tq]

My spare motor had that crap in the pickup too. Kevin made me feel better about it though lol. I'm am absolutely leaving that thing out of the VC this time! My solid one is starting to fracture in areas and has actually broken in half at one place so it's retiring now
Strange, the Audi gods usually don't look over us lol
They're looking over your shoulder though Chris

[loxxrider]

Yeah, they see too many BMWs in my present and too many Porsches in my future!

[loxxrider]

Quick avant update. The engine is out and has been to the machine shop. The head is getting new exhaust valves and lifters, upgraded valve springs, and titanium retainers. The block is getting checked and refreshed and after speaking with Jeff Gerner about what he recommends for the build, it will be getting Manley rods. It will also get coated rod bearings. Everything else will be stock, but refreshed.

I was contemplating having EFIexpress put an 01E in the car, but Nick convinced me that it isn't worth it. The reliability, shifting, and gear ratios of an 016 are much better. A 6th would be sweet to keep the RPMs down on the highway, but oh well. I will have the clutch disk upgraded from Southbend stg 3 to stg 4 while it's out however. Anyone want a nicely-broken-in stg. 3 clutch on it with just around 8k stock-turbo miles on it? Marc said it looks like it hasn't gotten much use at all (never launched it, it wasn't in the car for long, and the car was on stock turbo). It never made much power on the EFR before the hg blew.

The rest of the plan is the same. Just fix anything that needs fixed and get it dyno tuned for flex fuel. Then go destroy 440 whp mustangs and blow a lot of minds in the process like Nick

[85oceanic]

Hopefully the 016 holds together, I lost my center diff with my old Holslut turbo a few years back.

[Afterthought]

Quick avant update. The engine is out and has been to the machine shop. The head is getting new exhaust valves and lifters, upgraded valve springs, and titanium retainers. The block is getting checked and refreshed and after speaking with Jeff Gerner about what he recommends for the build, it will be getting Manley rods. It will also get coated rod bearings. Everything else will be stock, but refreshed.

I was contemplating having EFIexpress put an 01E in the car, but Nick convinced me that it isn't worth it. The reliability, shifting, and gear ratios of an 016 are much better. A 6th would be sweet to keep the RPMs down on the highway, but oh well. I will have the clutch disk upgraded from Southbend stg 3 to stg 4 while it's out however. Anyone want a nicely-broken-in stg. 3 clutch on it with just around 8k stock-turbo miles on it? Marc said it looks like it hasn't gotten much use at all (never launched it, it wasn't in the car for long, and the car was on stock turbo). It never made much power on the EFR before the hg blew.

The rest of the plan is the same. Just fix anything that needs fixed and get it dyno tuned for flex fuel. Then go destroy 440 whp mustangs and blow a lot of minds in the process like Nick

I remember speaking with Hank and he advised that if my project was on a budget it would be better to invest the money into having a solid engine than 01E. I think he favored the Gear ratios and from having B5 S4's i know what he is talking about with the 01E especially 1st and 2nd. But that choice depends on your power goals, it seems like the 5 speed 01E with the wide first would hold up to alot.
If I remember right he said the 016 was good as long as it was under 400 Wheel? Not sure exactly where the limit is.

[loxxrider]

The 200 20v 016 is more robust than other 016 from what I've heard. This turbo should be no problem for it, and nick and I both have good experience with it in the past at these power levels. The idea for the 01E was to have a 6th gear, not for strength purposes. I just like to keep the RPMs down on the highway for wear and tear purposes.

[ringbearer]

Just get the rotating assembly balanced and you won't even know you're turning 4K+ buzzing down the interstate

[loxxrider]

Having it balanced would be nice but I think we're past that point now. Plus it seems to be a dark art lol.

I believe the engine is almost done being assembled now and will be going in next week. We have a concrete date for finishing it now which revolves around my vacation time just before Christmas. I should be riding out with some corn in the tank around December 19th

[chaloux]

Woo woo corn train woo wooooooooo

[pilihp2]

Hold up.


Chris is gonna run e85, and he's doing it willingly?


This I gotta see.

[ChrisAudi80]

Hold up.


Chris is gonna run e85, and he's doing it willingly?


This I gotta see.

Don't recall he ever had an issue with E85...

[Afterthought]

Having it balanced would be nice but I think we're past that point now. Plus it seems to be a dark art lol.

I believe the engine is almost done being assembled now and will be going in next week. We have a concrete date for finishing it now which revolves around my vacation time just before Christmas. I should be riding out with some corn in the tank around December 19th

I was thinking about not balancing this next engine that I am building considering I am changing out the rods, and there is no inconsistency between the rods, and that I'm not doing anything crazy for clutch or FW. Depends on who you talk to I guess it seems that some have told me its not necessary and others say you must do it.
Some info I found.
http://forums.quattroworld.com/s4s6/msgs/121985.phtml

[loxxrider]

Yes, my stance on e85 has not changed. You just have to hear all of my viewpoints in one place to understand it.

I still will not run it in the revver. The reason is because that car will run only one fuel, and will sit for long periods of time with that fuel in it. E85 would gain too much water in that time.

I still don't like the consistency of getting pump e85, but that issue is gone with a flex fuel setup.

I still think the dissolved substances that shear out of solution when going through the injectors is a major problem, but this car will see mostly just bouts of e85 use with the majority being gasoline. That will eliminate the problem by self-cleaning the injectors.

So I deem it perfectly fine in the avant's situation

[chaloux]

So are you going to do a flex fuel setup in this car for ease of driving? Do two tunes and let it interpolate?

[loxxrider]

Yeah full flex fuel setup. I'm not sure if it is just a linear interpolation or if Marc will do more than two points. I think multiple is better, but he's the expert... If it is just two points, I'm sure that's the conservative way to go. It'll get dyno tuned though and that's a first for me.

[SEStone]

Having it balanced would be nice but I think we're past that point now. Plus it seems to be a dark art lol.

I believe the engine is almost done being assembled now and will be going in next week. We have a concrete date for finishing it now which revolves around my vacation time just before Christmas. I should be riding out with some corn in the tank around December 19th

I was thinking about not balancing this next engine that I am building considering I am changing out the rods, and there is no inconsistency between the rods, and that I'm not doing anything crazy for clutch or FW. Depends on who you talk to I guess it seems that some have told me its not necessary and others say you must do it.
Some info I found.
http://forums.quattroworld.com/s4s6/msgs/121985.phtml

I put 35k miles on a motor with drop-in Scat rods and no balancing work. When I tore it down, there was no abnormal bearing wear. But when I rebuilt it, I got everything balanced and the difference was night and day. The unbalanced motor had a lot of vibration at 3500 and 7000rpm that the balanced one did not. Hard to say if there are any other differences such as more power or longevity, but it was very clear from feel that the balancing did something.

It's not that the roads aren't balanced together, it's that the rods have a different big and small end mass than the stock rods that the rotating assembly was balanced with. It's actually pretty easy to balance rods in an otherwise balanced assembly, just need a scale, a hanger setup, and a belt grinder, as I believe the aftermarket rods are usually heavier than stock.

Sam

[88a5tq]

I would've liked to get balanced but it wasn't in my budget and my *gasp* shady f#cking machinist said its pointless when you account for carbon buildup on the pistons. Idk he's probably a crackhead. Anyway I'm glad to hear an eta Chris. It'll be awesome!

[SEStone]

I would've liked to get balanced but it wasn't in my budget and my *gasp* shady f#cking machinist said its pointless when you account for carbon buildup on the pistons. Idk he's probably a crackhead. Anyway I'm glad to hear an eta Chris. It'll be awesome!

I weighed a whole bunch of pistons during my last rebuild, including ones that were clean, dirty, and one that was lightly melted. Aluminum has a low density, so removing volume doesn't change the mass that much. There is so little carbon on a piston that it is maybe a couple tenths of a gram, really worst case. Based on the amount of material removed from my rods after balancing, they were probably 3-8g heavy stock, 'rule of thumb' is to balance everything within 1g across all cylinders so that is quite a bit off.

Sam

[jcarrick]

Any update on when the RennWgn will be back in service??

[loxxrider]

No particular date has been set now that I have a sweet B7 A4 loaner form Marc.

The delay is now because of the 01e swap which I've decided to have done. I can't stand the idea of blowing the trans soon after the car is fixed, so we'll go the safe route with the added bonus of a fresh rebuild on the transmission, updated internals, and a reaaaaaaly long 6th gear for all the highway cruising I do. I'd say another month will be required at a minimum, especially with me adding on "while you're in there" items at the rate of about one a day lol.

[chaloux]

Nice. May as well... No time like the present bud! Haha

[loxxrider]

01e mounts have been water jetted out and are ready to fit into the car after welding.

Trans will be ordered soon and then it's pretty much go time.