Perrin SRI report. Now up and running.

[rocketspeed]

Got the instructions to fix the Perrin SRI, which required cutting off the nipple for the BPV on the intake tube (which is all silicone) and inserting the supplied plastic elbow from the inside so it shoots the BPV's pressure toward the turbo and away from the MAF when it activates.

Install is pretty straightforward, instructions are sufficient to get the job done with basic hand tools.

With the elbow oriented properly, the car runs MUCH better. Its a good deal quieter than the AEM CAI it replaced, I'm sure due to location of the filter. Other than sound, I haven't noticed any significant difference in performance vs. the AEM. It sounds a little more polished vs. the AEM, which sometimes made funny noises due to the movement of air through it.

Idle is good, car revs fine, drivability is generally good.

Even with the elbow oriented properly, however, there seems to be some interference between the BPV and MAF under a particular set of circumstances- if you are on throttle and let off and coast (ie. push in the clutch), the RPM's will fall down below the 750 rpm's or so where idle is to a near stall. Enough to get the lights in the dash to come on like you're going to stall, although I haven't had a stall yet. It seems as though the BPV blows off more pressure than there is room for in the intake tube with the turbo not spooling back up, which forces air back past the MAF? Not sure.

I'm curious to hear what thoughts the Perrin guys have on this.

Anyway, it seems pretty good and I'll report back after I've got some more miles on it.

 

[thunder]

How do you find the filter location, any issues? B/c from the pics I've seen it seems that the filter sits in the path of hot air coming from the fan...

 

[Dr.Sound]

the near stalling is caused by turbulance.........i was afraid of that with SRI on MSP.
the intake tube itself is just too short.

 

[rocketspeed]

How do you find the filter location, any issues? B/c from the pics I've seen it seems that the filter sits in the path of hot air coming from the fan...

No real issue with the filter location yet, it angles up and away from the radiator unlike the AEM or Injen routing, which is more or less parallel with the front of the car. So the filter isn't being directly blown on by the fan.

No doubt, however, that the air coming into the SRI is going to be warmer than what the CAI draws - even though the fan isn't blowing right on it, its blowing hot air into the same general area. I'm just not comfortable running the CAI here in winter. The filter will constantly be wet with salty road spray, which is sure to be bad for the filter.

 

[rocketspeed]

the near stalling is caused by turbulance.........i was afraid of that with SRI on MSP.
the intake tube itself is just too short.

Seems to be the case. Its not a terribly common situation and easily avoided, but I still wanted to share what I've seen so far.

 

[FSDET]

that issue will be solved once u get a BOV and run the BPV/BOV setup. the bpv wont be recirculating enough air to mess up the MAF readings

 

[TX Speed Demon]

the near stalling is caused by turbulance.........i was afraid of that with SRI on MSP.
the intake tube itself is just too short.

I don't think this is the case. I am recirculating my Greddy BOV from the intercooler>throttlebody pipe with absolutly no stalling issues at all now. I had to loosen the greddy up as much as it could, then all stalling/bouncing of the rpms has stopped.

I think the stock BPV does not push enough air, not the other way around.

When I had the greddy set too tight, I would hear turkey and the car would want to stall. Now that I have it really loose, I get no turkey (no sound at all actually) and the car behaves just like it is stock.

mazdaspdprotege: are you running a dual set up or just the greddy?

One thing I have noticed is my car feels slower when it is recirculating vs. venting. I thought it would be the other way around, maybe the ecu just needs more time to adjust.

 

[FSDET]

im running only the greddy bov open vent. the rpms dip to 100 sometimes the engine light comes on but never stalls . i know i can tighened it more but i want the bov as loud as possible. as for the perrin intake i put a small filter where the BPV fitting is.

 

[TX Speed Demon]

im running only the greddy bov open vent. the rpms dip to 100 sometimes the engine light comes on but never stalls . i know i can tighened it more but i want the bov as loud as possible. as for the perrin intake i put a small filter where the BPV fitting is.

You should cap this off rather than have it filtered. With it not capped you are still pulling in unmemtered air (past the maf)

 

[FSDET]

yeah i know.. but i was trying to make the car run leaner.. anyway i dont have an a/f gauge so i cant tell u whats it doing.. im gonna cap it off later since that filter isnt mine

 

[rocketspeed]

Follow up on the Perrin, the issue I described above is pretty much a non-issue under normal driving conditions. You almost have to go out of your way to make the near-stall happen.

Car drives great with it on. Its a lot quieter than the CAI.

 

[griswold]

Follow up on the Perrin, the issue I described above is pretty much a non-issue under normal driving conditions. You almost have to go out of your way to make the near-stall happen.

Car drives great with it on. Its a lot quieter than the CAI.

What's your impression of power? Any extra? Smoother or different delivery?

 

[PERRIN_JOHN]

Follow up on the Perrin, the issue I described above is pretty much a non-issue under normal driving conditions. You almost have to go out of your way to make the near-stall happen.

Car drives great with it on. Its a lot quieter than the CAI.

ROCKET SPEED,

Lets see if we can't get it running 100%. Why don't you give our technical staff call? Thats what they are here for. Any time you have a run issue, fitment issue, or installation question give us a call. Not that I don't want issues to show up on the boards..... Some times problems are simple fix that one phone call can solve.

503.643.4677

 

[rocketspeed]

What's your impression of power? Any extra? Smoother or different delivery?

Seems about the same as the AEM. I'd guess the warmer engine bay air isn't as good for power as the CAI in absolute terms, but I don't think you can feel a difference. Its quieter and a lot less raw sounding than the AEM due to filter location.

 

[FSDET]

mines quiter too but its installed ghetto style, i havent conected the SRI to the bracket cuz my greddy BOV gets in the way(mine is on the turbo-IC pipe ) ..

 

[griswold]

Seems about the same as the AEM. I'd guess the warmer engine bay air isn't as good for power as the CAI in absolute terms, but I don't think you can feel a difference. Its quieter and a lot less raw sounding than the AEM due to filter location.

So you do notice more power over stock, then, huh?

 

[FSDET]

i didnt notice any power diffrence with the injen CAI,injen converted to SRI or perrin SRI.

but im sure the diffrence will be noticable if i boost more

 

[rocketspeed]

So you do notice more power over stock, then, huh?

The car sounds faster than stock, I don't think I can feel any measurable difference in acceleration, though.

 

[rocketspeed]

I've re-set my computer 2x and been over every nut and bolt about 5x now, still no remedy for the stalling issue. This is after implementing the fix, which was to cut off the BPV nipple and install the elbow in the intake, blowing toward the turbo.

Happens mostly when you drive in traffic (where you spend a lot of time giving it gas, then coasting- and consequently stalling or near stalling), not much on the open road when driving. Otherwise stock car.

I'm gonna call Perrin again tomorrow for help. They have been good so far.

 

[FSDET]

that sucks .. mine is capped off since im running an open vent greddy BOV but im gonna have the bpv/bov setup eventualy so i would like to see a fix