Why not the 7670? The 7670 and 8374 are dyno proven over and over again. A BR 2.3 mated to a 7670 1.05 made 600wtq at 3,800rpm and held more steady than Garrett and Precision competitors.

 

I got a bunch of stuff WPC treated, but the motor isn't even assembled yet.

However, no one in this thread should care since I'll be running an MHI FP Red

 

 

The 7163 has a mixed-flow turbine wheel and a light-weight Aluminum bearing housing. The testing that has been done (not on an Evo mind you) pretty much shows the 7163 outperforming the 7670 in all but very top end power. http://blog.perrinperformance.com/bo...test-and-tune/

The 8374 has shown some great results, but its a big move up the power band and gives up a considerable amount of spool compared to what the 7163 should do. Also anyone seriously considering an 8374 should probably be looking at the 9174, there are some posts showing that little bit of spool the 9174 gives up compared to the 8374 is more than made up for up high.

If BW adds mixed-flow and aluminim bearing housings to more of the EFR line, then the 7670 might be worth revisiting.

 

Dyno plot?

 

EFRs don't need no stinking dyno plots, they make 600wtq at 3,800rpm. I read it online, must be true. Did I mention they have amazing transient response.

 

^ the sarcasm is strong in you.

 

Maybe powerdriver was referring to this car: https://www.evolutionm.net/forums/ev...yno-graph.html

Very impressive results, but not quite as awesome as claimed: 590wtq @ 4100RPM.

Too bad the car was cursed. I wonder if he ever rebuilt it?

It's also funny to see that was from four years ago, but we still haven't seen a single 7163 / 4G63 dyno in the wild. At least we're close with a few builds and tunes reported in this thread.

Did Geoff @ Full-Race ever post any info? I thought he was running a 7163 on his personal Evo at one point.

 

Is anyone running EFRs in motorsports? even just HPDE? I don't mean factory backed/sponsored where you never hear how many turbos they go through, but independent guys who work them for 30mins at a time, and will care if it doesn't hold up.

I'm guessing wishful thinking, since it sounds like just dyno numbers are hard to get. but aluminum bearing cases, etc. etc. sound like trouble for real track abuse.

 

Not anywhere that I could find. There were pics of a couple 7163 on 8/9s on his facebook page a while back, but I never saw any dyno charts. Geoff stopped using evom (I think it had to do with vendor status). Its a shame because the forums he does still post in are full of wonderful info. A real loss for evom http://zilvia.net/f/showthread.php?t=460807&page=8

 

A guy name Tom has Fullrace 7163 kit on his Evo x and he does DE regularly. He's not on the forum much. I was going to do EFR at the beginning of the year but since I'm limited to 320 whp for my class, I have a hard enough time trying to keep it bellow 320 with stock turbo on e85.

 

Those were impressive numbers. Can't help but wonder if the early hit is due to the use of a Dynapack, but perhaps more importantly, the turbine wheel disconnected from the turbo indicating that the turbo couldn't sustain that kind of power level even if it can make it. I know it was said that this turbo came from an early batch that was not up to standards, but I've now seen enough turbine wheel destruction in EFRs to believe that this 7670 was not out of the norm.

 

MrFred

He is referring to RRE (RoadraceEngineering) 600whp Evo 8 TA car that was built few years ago in SoCal. Frankly the Dynopack at RRE must be "interpreted" for DJ numbers...so 600whp is not 600whp as it seems.

That is not the problem in itself- the issue is/was that the engine blew up, and more than likely too much backpressure..as 7670 has lots backpressure just like BBK-B at that level of performance, as R/TErnie and others have found.

So nothing to think here..nothing has changed.
Same as UHURU pointed...its all pies in the sky

 

There's another plot.

I am in the process of replacing my GT35r for an EFR7670 on my car which is built for AWD Unlimited time attack, NASA TTU, Global TA, gridlife TA and such.

Nemo Racing, Tilton Racing, as well as a few other top contenders in WTAC run EFR 7670-8374.
They've tried it, and proven the turbos work for road racing.

My knowledge on EFR's isn't as extreme as some of yours however, Nemsin, you sir are an a$$ and the reason I do not feel like visiting this forum more often.

 

You are the one making claims, and then posting dyno charts which do not support those claims. Sorry if getting called out on it hurt your feelings. Still waiting to see 600wtg at 3800rpm.