Thread: Product review: BPi Flow Stack

Holy crap! It is hard for me to believe that the DE MAF would kill THAT much flow/power. But it definitely wasn't helping the JWT at all. I think I need to invest in a BPI now after seeing those numbers. Thanks for providing those for us! I'm gauging the interest of a possible BPI GB on Gnet. I'm gonna link your post.

Videos of all three runs!

YouTube - Flow Stack Dyno Test



Sweet!

I am not sure what engine management you are running, but did you happen to log the boost vs rpm. This will allow you to see reduction/changes in compressor spool time?

Questions were all test performed on same tune? Did you retune after testing? Retuned dyno numbers?

I'm running a Calum Real Time ECU, it's basically a stock ECU with a daughter board that allows us to fully tune and changes all of the settings.

I have a a T25 ball bearing turbo, it was in full boost at 9 psi by 3k rpm. I will honestly say that with the BPi Flow stack the spool time was a bit faster/quicker. With stock or JWT, I'm sitting there and waiting for it to kick in

All tests were done on a Same tune (SR20DET 370CC injectors, 3 bar, Maxima E60 MAF).

I was doing a few tests, thus I made sure I had the same tune for all runs, then after that I started tuning for power.

I was honestly suprised to see 3whp more with the Filter, I think it helped improve the airflow and make it more "calm"

Awesome V man... thanx for the info. I am pretty sure with what Tom said about hoe different the JWT looks. I knew that had something to do with the flow other than the maf

Weird thing is, the ScanGauge was giving me 206 BHP for no flow stack and BPi at about 7k RPM. JWT was showing 233 BHP...

If you look at the A/F ratios you will see JWT and stock were pretty rich while BPi was a bit leaner. With BPi I had room to richnen it up at wot, so technically I should be getting better gas mileage earlier in the power band.

I think same thing.

The RR-motor MAF flows already a lot better.

That's good to know considering I have an RR motor, and therefore an RR MAF.

RR MAF is good for 325whp like the E60 MAF.