Victorymike18

I wanted to share some information that I have compiled, in the hopes that it will be inspirational to others regarding the potential within our 12v engines.

It started with this link that someone sent to me, and I've been digging around to learn as much as I can: https://forums.quattroworld.com/12vv6/msgs/2809.phtml




These engines were built by Rebello Racing, for the Stasis Engineering B5 A4 Speed World Challenge Touring Car.
According to some posts here by Paul Lambert, he was driving Car #77 Vortrag / CES A4 Touring car for the 2001 Speedvision World Challenge season: https://www.audiworld.com/forums/mot...driver-379111/

2001 World Challenge standings, with the Stasis Engineering car driven by Paul Lambert in position #50: https://www.driverdb.com/championshi...ring-car/2001/

This appears to be the correct car:


At some point later, the engines and the driveline / brakes, etc. minus the chassis itself seem to have been owned by Dynamic Racing Solutions. Here is a link to when they had it for sale in late 2009: https://community.drivenasa.com/topi...comment-206329

In November 2011 this '01 B5 was posted up with spare parts including two additional engines. https://www.audiforums.com/forum/veh...718/?styleid=4
I don't know if this is still with DRS or another shop, but by description it seems to be the same.

Now, the main purpose of this thread is to share the engine info that I compiled. I reached out to Rebello Racing and a gentleman there was kind enough to share build information with an engine dyno sheet (see below).

Blocks limited to a .040 Overbore, they used JE Pistons with a 12:1 compression ratio.
Cam was limited to max .50 Lift. They ran .495" Lift on what appears to be a 306 degree cam.
Headers and 3" Exhaust.
Motec ECU. (This is likely how it was run on the engine dyno).
Stock intake manifold, but with secondary butterfly valves removed.
Ported heads. *Additional details below mention larger valves

In addition to the info provided by Rebello, here's what I got from the listings:

Dry sump oil system
EFI Technology 2.1 ECU & CDI Ignition
Stainless headers built by Stasis Engineering
According to Paul's post, the engine had big valve heads. He mentions being limited by engine management but it is unclear whether that's the Hitachi ECU or other.
The photo of the engine appears to have a bored throttle body.

In these posts in Late 2001, Paul mentions that Stasis developed different cams, headers and intakes for the 2.8L. He also mentions blowing holes in the block: https://www.audiworld.com/forums/a4-...15/#post823129

Here's the build sheet with dyno from Rebello:


I plotted the HP and Torque in Excel:

JmuRiz

Very cool, I'd imagine a 300hp 7500RPM 12v would be a blast!!!
It's making 30v peak power at 4500rpm!

Victorymike18

Yeah, I bet it would be!

It is probably safe to say that these engines were pushing the upper limits of the 12v capability. However, there's a couple things I find interesting:

Oversized valves were mentioned and the build sheet says "Solid Cam" but there's no mention of HD springs or lightweight retainers. I'm going to assume those were being used, given how much time they would be spending in the 6-7k range.

Rebello told me the intake itself was stock aside from the removed secondary valves, and we can see the bored throttle body. Perhaps class rules wouldn't allow for a ported intake manifold, but we have seen through Mance Etheridge's work how much a stock intake can be improved upon. I'm curious how much was untapped there when we're seeing the power reach peak at 7000-7400 RPM.

I know a 1.8t is the tuner's engine choice, but I'd personally prefer to run through the gears with a screaming NA V6 any day!

desertsage

Wow, this is all very interesting and inspiring! I just noticed in the Dyno chart that C12 leaded racing fuel was used (of course?). I wonder how much less HP would be available with premium street fuel?

Blowing holes between the cylinders! That is too much.

It was sad to see the remains of that car and all of its parts in bins.

Victorymike18

Good question. I searched to see if there were any guides on power increase potential from the fuel, but it's really subject to how the engine is designed and tuned for it, so it's hard to say.

Regarding blowing holes: It is said that Audi designed the 2.7L twin turbo blocks with the smaller bore for this reason, and they also supposedly have 6-bolt main caps.

That is sad that the car ended up in parts. I reached out to Dynamic Race Solutions but haven't heard back. I wonder if it stayed together with another owner or if the parts went different ways. And if-so, where are the engines now?

On a lighter note, I finally found some video of the car in action. It is easy to find pictures of a pair of Silver B5's with red graphics, but those turn out to be S4's and not the same car. The Stasis 12v B5 driven by Paul Lambert was black with yellow graphics. The car gets a couple minutes of visbility (but no in-car camera) at 23:45

Victorymike18

A quick update to the thread: I've been in touch with DRS who noted that they bought all the spares from Stasis, but sourced their own chassis and built the cage. That explains why the Stasis B5 was black, but the car shown for sale by DRS was silver. DRS kindly put me in touch with a shop that they sold the chassis and engines to around 2010. That shop just got back to me to say that they never finished the build, and sold everything in 2012.

Knowing they existed up to 2012, I've found myself strangely committed to tracking down these engines!

desertsage

Hey Victorymike18, this is an interesting bit of info! Thanks for investigating this further. Let us know if you track down the engines.

Must be so cool to chat with these folks!