Short ram with BPI flow stack + K&N vs Simota CAI+BPI

[EK4_SIR]

Been to the dyno again today to tune up on the fuel settings and test which intake to keep and which to garbage.

BPI initiative flow stack and the K&N filter sounds fab especially at Vtec, but seems sluggish. I thought it required a tune because i was using the SImota carbon cannister 3" CAI + BPI funnel.

To my surprise, not only was the power and torque down on the short ram, it was down by quite a significant amount, no amount of tuning could of raised it back to CAI levels from 2000-8000rpm!

Anyway, at the end of the day my vtec is tuned, AFR's are in safe levels, engine response is up, torque is up and driving it is alot more fun. It was 34 degrees and 90% humidity so yeah it was not good for power. Now I am keeping the Simota with BPI flow stack.

Dyno was a Dyna pack, all tubing is 3" diameter.

references :
BPi - Performance Velocity Stack
Untitled Document (WS-253 / WS-254 / WS-256)

In the second picture, the lower 2 lines are the SRI, an initial run and a second run after 1 minute waiting, the drop in power is from the heat. The green line is the CAI. Better power and torque from the CAI is obviously and average 10% or more at 4500 and 6500 rpm.
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PROBLEMS FROM PRILOSEC

 

[jugbugz]

So your saying your CAI made more power than a short ram arm + Flow stack?

Interesting! did you dyno with the bonnet down? Yeh, I wouldnt recommend the short ram + stack inside a hot engine bay.

post up some pics of your intake setup

 

[EK4_SIR]

So your saying your CAI made more power than a short ram arm + Flow stack?

Interesting! did you dyno with the bonnet down? Yeh, I wouldnt recommend the short ram + stack inside a hot engine bay.

post up some pics of your intake setup

Hi,

I had the testing with the bonnet up to make things as equal as possible, I know that heat is not going to do the SRI any good.

So yes, CAI+BPI is much better than SRI+BPI.

It has to do with the intake lenghth, we played around with various lengths of aluminium tubing 3" in diameter, it is not "all top end" power for the SRI and "good low end torque" for the CAI.

CAI is the best intake you can get whether it is low down torque or high end power, plus you can be very consistent. I could do 3 runs with bonnet down with 1 minute waiting time and yet could repeat the runs, the SRI was all over the place.

Mind you, not too long so that the BPI funnel nearly touches the bottom of the splash guard, my BPI stack was 10" below the fender wall hole and at least 6" away from any surface.
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BBWClau live

 

[EK4_SIR]

Pictures of the CAI set up.
You can't see the BPI flow stack but it is on the end of the 3" rubber tubing, the tubing is smooth on the instead and not ribbed.

The original flow stack of the Simota was replaced with the superior BPI product.
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MilkMyBoobs cam

 

[jugbugz]

do you have pics of the SRI setup?

 

[EK4_SIR]

No i don;t have pictures of it, but basically you see the simota box? The BPI stack is put there and a K&N put over that.

I have converted to full CAI 3" diameter and used a BPI and K&N...amazing results over previous install.
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Toree live

 

[Ben_Andersonâ„¢]

Nice new setup ! Love the filter location glad it worked better then old too !

 

[jugbugz]

nice! but you know, the simota box is kind of half SRI and CAI. The filter is located in the middle of the system. Like the Ice Box, except the Ice box is a 3.5" system with 2 velocity stacks like the MUGEN again...

Well, to me, the ICE box and Mugen is like a SRI with a cover and Cold air duct.

 

[johnny_9]

can u show a pic of the inside with the velocity stack?

 

[elchunk]

thread is THREE years old...............

 

[tama666]

thread is THREE years old...............

but still relevant...

 

[Kozy]

I don't get these velocity stacks, does that go on the end of the pipe, then the filter goes on top of the stack? Or does it go before the filter in a box?

I am confuzzled.

 

[No_Fear]

Uploaded with ImageShack.us

 

[abunai888]

velocity stacks they do work but the most important is the length of the intake and diameter .

 

[_JT]

I don't get these velocity stacks, does that go on the end of the pipe, then the filter goes on top of the stack? Or does it go before the filter in a box?

I am confuzzled.

You can do both. You can put them at the end of the pipe picking up fresh air from the outside and on the pipe with filter on top. A velocity stack makes sure the air entering the pipe will stream fluently, instead of the sharp edges of piping causing turbulence and therefor a less than optimal flow.