My first Audi - 2001.5 S4 with Custom Single Turbo setup...

[britishturbo]

I've decided its finally go time with the 3.0 setup.
Beast Mode :-)

[getslideways]

ETA for awesomeness?

[slow ride]

I take it something happened to the engine or was it just the turbo?

[britishturbo]

ETA for awesomeness?

4 weeks... maybe less.

[britishturbo]

I take it something happened to the engine or was it just the turbo?

Pretty sure I cracked a piston ring land. Time to stop using 4032 pistons and put real pistons in for the job ;-)

[slow ride]

Yea at your power level/ci probably time for a 2618 piston even if the wear is not as good. You sure are making some jam though :)

[britishturbo]

[britishturbo]

[Mikse]

Why did you decided to go Loba cams over something more aggressive as I remember you weren't that impressed of their performance at first? I can't decide are they worth (performance-wise) over 2.8 cams?

[britishturbo]

Why did you decided to go Loba cams over something more aggressive as I remember you weren't that impressed of their performance at first? I can't decide are they worth (performance-wise) over 2.8 cams?

I was originally talking to Web Cams about some regrinds. We went through all their options and picked what looked good.
When all was said and done the best specs were pretty much spot on with the LOBA cams...
At that point it was a Web regrinds vs a Brand New blank on a LOBA set. I decided I trust a new blank a lot more!
Plus LOBA has a lot more experience with the market, plus rumor has it that Quattro themselves helped with them...

[Mikse]

What characteristics were you after when you went through different cam specs and ended up with same as loba?

I'm trying to educate myself to understand how the car would perform (hp/tq curve) with CAT vs LOBA cams. Specs between those two is quite different.

[audi-hammer]

I've decided its finally go time with the 3.0 setup.
Beast Mode :-)

WTF mode was it in before then?

[britishturbo]

WTF mode was it in before then?

Off the shelf parts mode lol

[Meow]

Off the shelf parts mode lol

other than the heads ;) lol

[britishturbo]

other than the heads ;) lol

Minor details lol

[britishturbo]

So I called Precision last week... got an RGA number for my turbo.
They said they were about 3 weeks behind on repairs right now... figured no big deal.
They got my turbo Friday, and called me today and got it out the door to me today.
Hows THAT for service?

[mikeb17]

So I called Precision last week... got an RGA number for my turbo.
They said they were about 3 weeks behind on repairs right now... figured no big deal.
They got my turbo Friday, and called me today and got it out the door to me today.
Hows THAT for service?

Valued customer? ;)

[britishturbo]

Valued customer? ;)

I guess? lol

[Mikse]

What characteristics were you after when you went through different cam specs and ended up with same as loba?

I'm trying to educate myself to understand how the car would perform (hp/tq curve) with CAT vs LOBA cams. Specs between those two is quite different.

Bump :)

[okkim]

I am also waiting answer for this ;)

[spd579]

I think he might chime in after he makes 1000 whp @ 8500 rpm with 30 psi @ 3500 rpms

[britishturbo]

Haha I'll wait and see my results first... if I'm right I'll tell you how I made the decision.

[britishturbo]

Got my turbo back:





Random junk in my office lol

[britishturbo]

Some shots of my pistons

[tosh2.7]

any updates

[spd579]

Your piston has a dent in the middle

[oppositelock]

Your piston has a dent in the middle

Longer stroke raises compression ratio. Normally that means you need more dish in the piston to get CR back to reasonable numbers. But E85 allows you to run ridiculously high CRs *and* boost. Some of the turbobricks guys are running as high as 12:1, so I guess I'm surprised too.

[spd579]

Longer stroke raises compression ratio. Normally that means you need more dish in the piston to get CR back to reasonable numbers. But E85 allows you to run ridiculously high CRs *and* boost. Some of the turbobricks guys are running as high as 12:1, so I guess I'm surprised too.

Was a joke

Longer stroke doesnt necessarily raise the compression ratio either FYI. It would depend on the height/design of the piston the coorelates with the extended stroke.

[britishturbo]

any updates

Too crazy busy this time of year to make much progress.
The 2.7 is out of the S4 that's about it... lol

I've been super crazy busy getting ready for the Performance Racing Industry trade show next week...
I'm going to be machining a cylinder head from Billet Aluminum at the show.
Here's some pics of my work on getting ready for it:

First we start with a 35" x 8" x 6" piece of aluminum...


Then we take a chisel and knock some meat off it... lol


Mmmmm shiney....


Then we take a dremel... lol


Poke some holes in it...

[britishturbo]

Once I get back from the PRI show I'll finally get to work on my block and heads etc for the 3.0... I'm excited :-)

[britishturbo]

Longer stroke raises compression ratio. Normally that means you need more dish in the piston to get CR back to reasonable numbers. But E85 allows you to run ridiculously high CRs *and* boost. Some of the turbobricks guys are running as high as 12:1, so I guess I'm surprised too.

Was a joke

Longer stroke doesnt necessarily raise the compression ratio either FYI. It would depend on the height/design of the piston the coorelates with the extended stroke.

Stroke doesn't raise compression as it's factored into the piston height.
The dish is actually a lot deeper on stock pistons...
9:1 83mm pistons have about 6ccs in the piston dish, these 10:1 have about 3.3cc.

But between the work I'll be doing to the heads etc it's hard to say what the exact final compression ratio will be. But it will be around 10:1.

[tosh2.7]

where is this expo gonna be?

[britishturbo]

where is this expo gonna be?

It's been in Florida for the last half a dozen years but is back in Indianapolis from this year.
http://www.performanceracing.com/

[tosh2.7]

It's been in Florida for the last half a dozen years but is back in Indianapolis from this year.
http://www.performanceracing.com/

so not local lol

[oppositelock]

Stroke doesn't raise compression as it's factored into the piston height.
The dish is actually a lot deeper on stock pistons...
9:1 83mm pistons have about 6ccs in the piston dish, these 10:1 have about 3.3cc.

But between the work I'll be doing to the heads etc it's hard to say what the exact final compression ratio will be. But it will be around 10:1.

I was referring to the fact that if the volume at TDC remains the same with the stroker setup, the CR increases due to greater volume at BDC.

Looking forward to seeing how the extra compression helps you spool that big ass turbo!

[slow ride]

What is that head for? A Jeep or diesel?

[Monty23]

What is that head for? A Jeep or diesel?

[spd579]

Practicality at it's finest

[britishturbo]

That might even be my customer whose head program it is... lol

[slow ride]

Thats why I ask. If you check my location you can see it's smack dab in the hart of Deere country :)