I see all kind of tests here, and most of the times they leave a lot to be desired, I hope this one people enjoy.

Car:
b18c1, jdm type R pistons (11.3:1), BCIII+, Stock typer cat back, AEM 3" CAI, 98typer 4-1 header, Blox IM, 62mm TB, Crome tuned

30000 Kms since the rebuild

Test Scenario:

Rolled the car on the dyno, car coolish, did run 009 (car fully tuned in this form)

took off AEM k&n, from in front of the right wheel, put on BPI with k&n on it, and replaced plastic liner, car 100% like it came in ready to go on the road.

Made a complete pull on coolish car (20 min since 009), dyno computer locked, re-did imediately on HOT car and produced run 010.

No tuning was done at all, vtec affected, more power there, but as it is, consider BPI untuned.

Dyno


Driving Impressions

Dyno does not tell 1/2 story here, engine is way more smooth, transient response is amazaing, part throtle is amazing, I drove around to 3am this morning for no reason at all


Bryan, thank you





Modified by ninor at 11:39 AM 8/22/2006

 

Good work to you and Bryan

BPI flow stacks are gonna sell like hotcakes....

 

No picture, just a red X. Please fix as I'd like to see the results. Thanks.

 

It works for me, I am not sure. I am hosting this on my desktop PC, I will ask around to see if I can host it somewhere else.

I am using port 8014 for security reasons so it could be that your firewall is blocking you on that port. Do you have other comps you can try on?

I have given this image to Bryan so I'll ask if he can put it up to link to it instead (since I turn off my PC at night anyway)

OK, I put it on port 80 for now, you should be able to see it.


Modified by ninor at 12:13 PM 6/9/2006

 

Very Nice!

I'm sure with a little tunning, you get smoothen out that dip @ 5700. How does the car feel though? Any noticable change?

 

Change is amazing, I do not completely understand why it made so much difference, but it feels much more "crisp" and goes like nuts. I like to use 2-3 gear alot, through some twisties, and double clutching, short spurts of throtle is awesome, it simply responds and goes.
So yes, in short, change is bigger than those numbers on the dyno suggest, also outside on a crisp day (like today) I am 100% sure it is 190whp, vtec dip is gone as well, I must have heat soaked the engine on the dyno so it had that hickup at 5700, problem I have now is that I have rammed into rev limiter 4 times so far this morning...
BCIII+ usually stops at 7800, but now it "tricks" me into hitting the rev limiter(8150)
If you look at runs 009 and 010 you will see that even on the dyno I hit the rev limiter after putting the flow stack on.
Have to re-learn my engine sounds...

Knowing what I know now, in all these years building engines, this is the best $/value mod I have ever done. Especially considering that this was a fully tuned motor before putting this velcity stack on.


Modified by ninor at 12:11 PM 6/9/2006

 

Ninor, thanks for fixing the pic.

Good job Bryan. I'll be picking mine up hopefully within the next week or so. And of course, before/after dyno results will follow.

 

Wow, that is a nice pick-up.

Great job Bryan

 

Nice!

 

want to have one..right now..

 

I'll try to post up a dyno sheet of my results. They were pretty much identical to what you got. The a/f wasn't affected all too much but we made a solid 2-4whp accross the board.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeySpec &raquo;</TD></TR><TR><TD CLASS="quote">I'll try to post up a dyno sheet of my results. They were pretty much identical to what you got. The a/f wasn't affected all too much but we made a solid 2-4whp accross the board.</TD></TR></TABLE>

bump for results..

 

where can you pick this BPI stack at?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMlyfestyle &raquo;</TD></TR><TR><TD CLASS="quote">where can you pick this BPI stack at?</TD></TR></TABLE>

Would like to know as well. Any pics of this?

 

this stack will work in a ram air style intake without filter? because in their site says it's specifically designed to maximize the air flow rates into your cars air induction system while maintaining the use of an air filter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C1_POWER &raquo;</TD></TR><TR><TD CLASS="quote">this stack will work in a ram air style intake without filter? because in their site says it's specifically designed to maximize the air flow rates into your cars air induction system while maintaining the use of an air filter. </TD></TR></TABLE>

ive seen some people using the big K&N's for big trucks on there VS intakes

 

http://www.bpinitiatives.com/products.html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ninor &raquo;</TD></TR><TR><TD CLASS="quote">Change is amazing, I do not completely understand why it made so much difference, but it feels much more "crisp" and goes like nuts. I like to use 2-3 gear alot, through some twisties, and double clutching, short spurts of throtle is awesome, it simply responds and goes.
So yes, in short, change is bigger than those numbers on the dyno suggest, also outside on a crisp day (like today) I am 100% sure it is 190whp, vtec dip is gone as well, I must have heat soaked the engine on the dyno so it had that hickup at 5700, problem I have now is that I have rammed into rev limiter 4 times so far this morning...
BCIII+ usually stops at 7800, but now it "tricks" me into hitting the rev limiter(8150)
If you look at runs 009 and 010 you will see that even on the dyno I hit the rev limiter after putting the flow stack on.
Have to re-learn my engine sounds...

Knowing what I know now, in all these years building engines, this is the best $/value mod I have ever done. Especially considering that this was a fully tuned motor before putting this velcity stack on.


Modified by ninor at 12:11 PM 6/9/2006</TD></TR></TABLE>

Ninor...

do you have a plot of your A/f's? (before and after) I'd like to know how these Velocity Stacks effect air/fuel ratios. Is a re-tune a must?

 

I do not have a plot ( I did not use WB on the dyno).
To be honest with you I did not expect this to make more then 1-2 whp (within dyno's margin of error anyway), so I did not connect WB (extra $) at the dyno.

Once this thing cranked out # as it did, I got concerned, so to be safe, I connected my WB and went out for a drive.
Again to my surprise, there was no tuning required, things looked just fine...
I did not notice any difference from where I left it off when it was tuned.

Now this is the case with my motor, I am not sure that this will be the rule with all the setups, but take it for what it is...

 

I was present for tuning of a built B20 at St00pidfast here in Houston. The A/F leaned out a bit with the installation of the BPi Flow Stack, with or without filter. Nothing too significanct or to be concerned with, unless your car is tuned on the ragged edge. Some more fuel may have picked up the gains some though. I will see about posting the results, but I am not sure if its against the rules or not.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C1_POWER &raquo;</TD></TR><TR><TD CLASS="quote">this stack will work in a ram air style intake without filter? because in their site says it's specifically designed to maximize the air flow rates into your cars air induction system while maintaining the use of an air filter. </TD></TR></TABLE>

To answer your question, yes the Flow Stack will work in a ram air style setup without a filter. While the geometry was tweaked to account for a 'small wall' (ie. end cap on the filter) in front of the Flow Stack the differences in CFD were on the order of less than 1%, and my models did not account for flow loss through the filter media. The same B20 talked about above was tested with and without a filter on the Flow Stack. The two power curvers were intertwined throughout the whole engine operational range with the most different being probably a couple ponies at most, generally about 1whp.

 

Well i just got my bpi flow stack.. now i only need the filter and them to the dyno.. my car puts 191whp 2 weeks ago.. so i hope some more with this..


Modified by bulori at 4:39 AM 7/26/2006

 

I look forward to your results. Thank you for your support.

 

I am impressed. Excellent powerband improvements for next to nothing cost wise.

Although i would really like to see this comparison done against an OEM S2000 filter.

None-the-less awesome product.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by junbb1 &raquo;</TD></TR><TR><TD CLASS="quote">I am impressed. Excellent powerband improvements for next to nothing cost wise.

Although i would really like to see this comparison done against an OEM S2000 filter.

None-the-less awesome product.</TD></TR></TABLE>

Did you run some dyno testing on a S2000? If so contact me, you may be elgible for a free stack.