Welp I guess this fully derailed now.

My car (going to 8500), and then the clearly higher numbers are a 2.4LR, ETS Twinscroll 6466 1.15ar, ER ported head, R2's, and Magnus street (older sheet metal) intake, revving to 8300.




These are same graph, different pics. Couldn't remember which one showed rpm. This is a 2.2L, ETS twin scroll 6466 1.15ar, S3's, and a magnus V5 intake, and. Buschur head. It's getting a better head next month and will pick up power, and over. This is on really like all of it. 43psi, revving to 9200. And we picked 20hp (820 to 843) going from 17* to 18* out the top. The head just isn't flowing like it should be, IDC starts falling right after peak power because the head doesn't have the VE.




I do not know.

 

FWIW, my car (IX) with R2's, ported stock intake, 2.15L, 6268 (S362SXE) on pump.

 

Pump can be deceiving because your running low boost for the turbo and never run into back pressure. And it shows with how the the power curve just climbs and then barely levels off. That thing looks fun to drive.

 

I wouldn't qualify 33psi as low boost for this turbo at 8K RPM on a 2.15L. Its a 61.4mm compressor inducer and matchbot says 33psi at 8K RPM on a 2.15L is just about riding the choke line. The Borgwarner Engineer who setup matchbot warned me that I am pushing the turbo close to its limit at that boost, but probably OK for SXE, but definitely a NoGo for EFR without the speed sensor to confirm no overspin. Would need a speed sensor to confirm, but boost tapers because turbo is more of less out of steam (within 1-2psi). Strongly debating to buy a 6673 with 0.81 a/r just for fun.

 

Thanks for posting , that looks fun!

 

Thanks for posting ! That’s pretty impressive spool for pump on a decent size turbo!!

 

But if you ran E85 you could run more boost down low (40psi or whatever) and let it taper. This would make more low end torque, and it would hit peak power earlier and taper off as the compressor ran out of steam and made less boost. Regardless of that. 33psi a pressure ratio of 3-3.5:1 depending on intake and atmospheric conditions. Your making 600whp. So at most you're using 65lb/min of air, you're probably right in the 74% efficiency island. Looking at the comp map, you're much more in the sweet spot than riding compressor choke. That turbo should make 700+ cranked up on good fuel.

https://www.full-race.com/store/toyo...sxe-8376-62mm/

 

Spool is actually better on the street (~200rpm) as you can see below because the dyno does not sufficiently load the engine vs the street. Didn't see this discrepancy with the GTX3582r (street vs dyno), but definitely do on this turbo due to the 6mm larger turbine wheel. Log below is street vs dyno spool both in 3rd gear.

 

Choke line is 78lbs/min and you are below 60% efficiency. 78lbs/min can make 650hp or it can make 750hp depending on ignition timing so you can't necessarily equate HP to compressor flow. If I ran C16 it might make another 100hp as you suggest, but the turbo is pumping out the same amount of air from the compressor at 33psi in both cases.

EDIT: Matchbot says ~72lbs/min on pump gas based on the calculations, but I acknowledge this makes a lot of assumptions so need a speed sensor to accurately plot flow based on compressor map. My only point is that for a given flow you can have a wide range of torque due to ignition timing.

 

Ill let you know in a couple weeks when I get everything installed had to send that turbo back though since it was the smaller one and I ordered the larger one.

 

That's nice!!!!!!!!!!!!! Can't wait to see the results.

 

Any update on this ?

 

Running into more delays on this because of the COVID fiasco. English Racing has a tuning day setup here 2 May. Should be good to go for that.

 

Will be waiting to see the results.

By looking at the specs i am still confused to which turbo it is comparable with
6466, 6266 or any 800 hp capable EFR series.

 

I'm still hoping the T4 divided housings come out soon.