600 whp would be right up there with the best 7670 results I've seen. I really wish BW would update the 7670. Can't believe anyone would buy one when the 7163 can do everything the same or better.

 

I have a 8374 on my personal Mk2 TTS with swapped 2.5 DSG I am building. It should be a riot. We have a couple of 8374 TFSI 2.5L builds going right now, so you should see some data soon. If you want, you can run one of our manifolds



Just because you raise the rpm to 7100 on the stock k16, it doesn't mean you should Matchbot the 6258 which is flow wise basically a 7 blade k16 in the TTRS with a bigger turbine and A/R.



That should explain why you have to dump massive amounts of fuel and timing to rev to 7100. Hell of a testament to the CHRA and bearing system in the BW JB turbo though!

I cut the party at 6800 because frankly, if you can't be fast on track with 3500 rpm of over 450wtq in a 3300lb car on 275s, you don't belong behind the wheel of a car. It could torque drop to 7500, but it isn't like TTRS syncros are fond of shifting at 5000 rpm, much less 7500.

7163 is a little beast. It has virtually the same corrected turbine flow on a .80 AR 63mm turbine of a 68mm 35r turbine in a .63 AR. The compressor isn't but 1 mm smaller than the GTX3576r. Transient response is hands down faster on the 7163 vs the GTX3576r on a .63 or gtx3076r on either housing. The 7163 feels like a stock turbo. It's map is suited for low boost, high flow systems. The surge line would not support 35psi from the word go on a 2.5L, nor would it be efficient anywhere. This turbo works really well on flow heads at lower pressures. Just part of the design of a 6x6 design on a low trim.

That Finland lower manifold does look cool. Do you have any more info on it?

 

The maps are just completely different. Different applications and better A/R selection too. The treadstone vband housing is available if you must have vband in/out, and the BW version is coming soon.

We are going to play with some 7670s on the QSV devices in the new few weeks. My hunch based on sizing and experience is that on a 2.5 5 cylinder, we will see full boost by sub 3500 like the 7163 but have another 40-50whp on top with the superior turbine flow with the bigger wheel/ 1.05AR combined with a 7blade wheel for a sexy map.

 

I'll look forward to seeing your car run at the strip. Let me know when you trap 138mph with a 7163.

 

Let me know when you trap 138mph on a full weight .64 AR GTX3576r

Was that on a .82AR hotside with the cookie cutter APR kit? Most of the cookie cutter times I see are in the 127-131 range, which is pretty on par with what I think a 7163 will run if I can find a customer that cares about quarter mile times.

Let me ask you this Eric, would you prefer a GTX3576r in a .63 or a .85 7163? That is all I am saying. The GTX3576r in a .82 and obviously a GTX3582 or HTA3586 would eat a 7163 up in raw hp, but you are talking a turbo that spools 400-500 rpm later in a .82 AR for the GTX3576r and more like 700-800 in the case of the GTX3582r and HTA3586r. They really aren't in the same class. It is cool the APR kit will support some of the larger garretts though, assuming there is room for the T04S compressor cover vs the t04E in the stage 3 kit. The 6466HTA would be a kick in a built 2.5T with cams and DSG

 

104 octane .64 housing. You haven't ran the car yet and you're talking ****? I would prefer the 8374. Work over time is more important than what RPM it spools at. I'd rather extend the power band another 700 rpm and let it spool at 4000-4200 and make more power. You can run the T04E with a GTX3582 FYI. FP also makes a 3794 that will fit with their compressor cover... so we have options.

I would prefer a 2.2L Evo with an 8374 EFR T4 EWG... and I'll eat your lunch no matter what turbo you have.

 

So I see this setup could reach up to 600whp (450kwatw) with the single scroll V-Band housing.

How much would the 0.80 A/R T4 Twin Scroll IWG exhaust housing limit top end power?
Maybe 30-40whp?

This kind of setup would be killer on a 2.3/2.4 Evo engine.

 

No one has done it yet. Must admit, I'll have to see it to believe it, preferably on a DynoJet.

 

Just got done building this kit for my X. I have a 76/70 T4TS EWG going on my X, and a 91/80 T4TS going on my 8.

 

The dyno sheet showed 550whp with 125k turbine speed (150k is max), that's why I was looking hopeful

 

Nice work! Kit loooks great.

 

I can keep dumping EFR data, but it is all Audi 5 cylinder data. If nobody objects, I'll keep it coming.

 

It's OK with me. Most of us can extrapolate the data for other displacement engines.

 

+1

 

S2 quattro owners, like myself, are always happy with that Eric