Thanks letsgetthisdone! For the most part it's what I expected. I think I might give this unit a chance. Looks like it flows the same, or maybe slightly more, than an FP Green. The research seems to indicate better response due to lighter compressor/exhaust wheels though. I really want to stick with the OEM look - I probably should have picked up the MHI FP Red back when I could! Still, it should make my goal of 500-550WHP.

Thanks!

S.

 

Rom I actually run the bbk-3b that I bought from CBRD back in 2013, at the moment Tom is actually in the process of my 2.3 build which is basically similar to yours. He should be tuning mine soon and the #'s will be posted, I'm very curious to see how the bbk-3b will spool with the 2.3. It will be tuned on 93/meth since I have no E85 locally to me.

 

It looks like you've done a fair amount of research, but around here it seems that the 2.0XTR/BBK-3B definitely will outflow an HTA green, while providing a basically equal boost threshold.

I did a bunch of thread digging on this turbo as I nearly bought one, and 500-550whp should definitely be attainable with the 2.0 plus you should get the benefits of the lighter rotating assembly vs. an FP Red.

I think the FP stuff is great but to me the Blouch options are more appealing for certain setups.

 

Sounds good - will be good to see what numbers you get, but more importantly, how it feels, response-wise! Was the bbk-3b you got a BB or JB CHRA - I think they were offered in both, but I'm not too familiar with the history of that turbo.

Thanks!

S.

 

Hi awhit17 - my setup is actually a 2.3, but otherwise I agree. I am investigating lead times on the 2.0XTR right now with MAP..

Thanks!

S.

 

My bad, I meant to type 2.3.

Best of luck with your turbo search!

 

yeah I have the BB version , it was actually called the BBK-B-BB but people just say 3B for the ball bearing version.

 

Ahh, cool - good to know! Some more goodies arrived today..



Brand new lifters (I went with the GSC Zero-Tick ones), Kiggly HLA, ARP bolts (I know the cam caps ones are overkill, but there is so much ARP on this build already, I thought I may as well keep it going! I like the 12-point heads anyway.), and the OEM stuff for the timing belt change.

Got more stuff coming tomorrow - so hopefully I'll be able to complete the long block build this weekend, including intake manifold, etc.

Thanks!

S.

 

Shouldn't this been in the build section?

 

For street 3B is awesome.
Virtually over responsive on 2.3.

But there is another big but: stock frame back pressure, you cannot "maximize" stock frame on road course.
The stock frame used in NASA/SCCA TT3/T2 run power to weight ratio 10:1, so 22-23psi Max on E85 or race gas. Power about 325whp.

You cannot push stock frame on track for 30min on E85 at 30psi.
You cannot push full frame they hard and long without consequences, but you can run safely full frame at 25psi making lots more power due to less back pressure.

I would seriously consider full frame twin scroll T4 like HTA3076, proven track reliability.
EFR8374 is another great choice but now it's getting expensive and more complex.

If you will only do occasional track day then 3B or FP Red MHI on 2.3. 3B best response, Red more power.

Consider that stock frame over 23psi is not safe boost on track, so speaking of 550whp is silly, it takes 35psi to get that on 3B!

 

Backpressure is the devil. You are correct but I don't think it's that extreme on a 2.0. Ethanol lets you get away with a lot since it burns cooler.
I'm not sure on the Nasa/scca rules but I've run the bb red at numerous track days at 450whp and 25lbs on e85. Back pressure is more of an issue at higher boost . 25lbs seemed to work well for me. The car would also pick up power well given additional boost. I had a backpressure sensor on my car and had 38lbs of back pressure at 30psi of boost thru an 02 housing an full exhaust. Not ideal but it still made good power.
Hondaguy tracked his car a few years on the red. 20-25psi Iirc

If you are building a track only car then a T4 3582r would be my choice. 4300-8000 or so powerband and could make all the power you would ever need.