Details:
Intake - 3" Injen Shortram Intake (Part No. INJ-IS1420P)

Engine - B18C (GSR) Engine Bored to 84mm (Stock GSR Crank), Stock ITR Head, Skunk2 Stage 2 Cams, Edelbrock Intake Manifold, 68mm TB, Tri-Y Header

Dyno Type: Dynapack Chassis Dynometer

Location: Bisimoto Engineering - Pomona, CA

The engine was tuned with the BPi Stack first, but note A/F ratio maps indicate no significant changes in A/F ratios. Air Temperature was also logged (I did not post), but both passes were within 2/10s of a degree F through through both passes.

Legend:
Red = BPi Flow Stack
Green = Injen Filter with Built-in Velocity Stack





Thanks to all my customers providing test data.

 

definitely a quality product, because I know it will be asked....did the BPi stack have a filter on or not?

 

Good to see the BPI stack out there being run successfully.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stealth1 &raquo;</TD></TR><TR><TD CLASS="quote">definitely a quality product, because I know it will be asked....did the BPi stack have a filter on or not?</TD></TR></TABLE>
I'm waiting on that clarification myself.

 

What does the built-in VS intake look like?

 

i have one

 

Bryan,

i will be testing your flowstack with my h22 on October 21st. Any particular filter you would like me to try to get and compare it to? All i have access to right now is a no name filter and a 3 year old K&N

 

blake i can send you a brand new noname filter if you want....

i think we oughtta compare it against the apexi, ppl seem to be comparing the bpi stack to it a lot....

 

if someone will send me an apex'i filter, i will test it and send it back to you. I'm getting on the dyno for an hour just to nit pick at my timing. I'd guess it will take a maximum of 30 or so minutes to do that, then spend the other 30 minutes doing a comparison.

 

I have a used Apexi on my turbo project, but would prefer a new filter to eliminate any potential biases, but mainly to silence the "excuses"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">Bryan,

i will be testing your flowstack with my h22 on October 21st. Any particular filter you would like me to try to get and compare it to? All i have access to right now is a no name filter and a 3 year old K&N </TD></TR></TABLE>

An oem honda s2000 filter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by junbb1 &raquo;</TD></TR><TR><TD CLASS="quote">An oem honda s2000 filter.</TD></TR></TABLE>

its a 3" cone?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stealth1 &raquo;</TD></TR><TR><TD CLASS="quote">definitely a quality product, because I know it will be asked....did the BPi stack have a filter on or not?</TD></TR></TABLE>
Got the info on this. Disappointing as it is, test was without a filter, which can certainly represent a bias, though from testing I have seen its small, referencing the following dyno plot: http://www.bpinitiatives.com/images/test_04.jpg

 

I will do another dyno filter on vs filter off when I hit the rollers within the next two months also.

to Bryan for a great product

one question though, is it absolutely imperative that the edge of the plastic that goes into the coupler to the intake be completely flush with the metal of the intake tube, would a gap there create turbulence and negate some of the effects of the filter??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">one question though, is it absolutely imperative that the edge of the plastic that goes into the coupler to the intake be completely flush with the metal of the intake tube, would a gap there create turbulence and negate some of the effects of the filter??</TD></TR></TABLE>

I need to exercise caution in answering this one. A small gap or lip (from ID difference) can potentally cause seperation of the boundary layer at the "defect". That said, the significance of this "flow disturbance" is probably null (ie. zelch). The benefit of the stack is controlling the flow around the inlet and into the tubing.

For the **** enthusiast (myself included) I would recommend positioning the stack in contact with the tubing to minimize the gap and maybe use a knife (or dremel) to clean up any sharp corners or edges at the junction of the stack and tubing. Of coarse do this with the intake off the car and clean it thoroughly so you are not dumping plastic or aluminum debris into your combustion chambers.

 

Ok I understand what you're saying....I just had to trim the pipe at a weird angle to get it to fit....