Big turbo upgrade

[JonnyDerv]

evening all,

Currently running 420bhp at 1.7 bar on a gtx2867r with a 0.54 v band turbine housing. Running cams and vernier pulley, external wastegate etc. Stock Rev limit, stock valves.

It's been a daily but I'm now looking to make it a weekend car just to go out and have abit of fun so I'm considering upgrading.

Current full boost is around 3.5-4K but spools fine even pottering about at 2.5-3k even on 8.5:1 pistons.

I'm considering putting a gtx3067r. In my understanding the gtx3067r is interchangeable with the turbine housing I have but is 0.54 too small for this turbo? Bare in mind I have stock Rev limit. What sort of spool penalty should I expect with the bigger turbo on the same housing or the smallest turbine housing I can get?

 

[hydro s3]

What engine internals are u running to get that power? Also are they standard piston?

 

[superkarl]

evening all,

Currently running 420bhp at 1.7 bar on a gtx2867r with a 0.54 v band turbine housing. Running cams and vernier pulley, external wastegate etc. Stock Rev limit, stock valves.

It's been a daily but I'm now looking to make it a weekend car just to go out and have abit of fun so I'm considering upgrading.

Current full boost is around 3.5-4K but spools fine even pottering about at 2.5-3k even on 8.5:1 pistons.

I'm considering putting a gtx3067r. In my understanding the gtx3067r is interchangeable with the turbine housing I have but is 0.54 too small for this turbo? Bare in mind I have stock Rev limit. What sort of spool penalty should I expect with the bigger turbo on the same housing or the smallest turbine housing I can get?

The 3067 won't fit in a 28 housing. The turbine wheels are different size and a/r, 56mm vs 60mm. It retains the same compressor wheel but if upgrading you may as well go bigger.
0.54 would also be very small for a gt30 sized turbo. .63 minimum imo.
Consider the 3076 that bill uses for his builds.
Expect similar spool up, maybe ever so slightly later if on low compression pistons

 

[JonnyDerv]

Nope, standard comp is 9:1, I'm 8:5.1 on mahle Motorsport pistons.

Pistons, rods, cams, vernier pulley. Otherwise engine is standard, rebuilt about 10k ago now I think.

Really? I was under the impression they were interchangeable. I thought 0.54 might be abit small. What's he using? The HTA ones?

 

[JonnyDerv]

Oops forgot I'm 0.57 not 0.54 hotside

 

[Tj 0785]

Aet ones
http://www.audi-sport.net/xf/threads/couple-of-s3-builds-stroker-aet3076-and-stroker-aet3584.314594/