Move MAF or Recirc 100%?

[ChopstickHero]

So Could U Just Bipass An After Market Blow Off Vavle? If It's Been Installed Already? Tighten It Up And Diconnect The Vacum? U Know, Kind Of Like Being Stock But With Hard Pipes.

yes, it's possible to recirculate an aftermarket blow off valve. but you wouldn't disconnect the vacuum as you would need that so the bov can sense when there is a change. you would need to run a house from the bov back to somewhere along the intake tract.

 

[tiwing]

a few things I've learned in my travels so far: You can get compressor surge when not in boost. the reason is that the turbo is still spinning inside the housing at the speed of the exhaust whether or not it's being used to create boost. If you are at 5000 rpm you're not necessarily in boost all the time. Slam the throttle closed, the airflow has no place to go, but the compressor wheel is still trying to spin. (edit: thus the pressure is higher on the turbo side of the throttle body than in the intake manifold, causing the vacuum to the BOV to pull the piston open /edit) Compressor surge is the sound you get when the impellor blades are trying to spin against a non-moving air mass. That's why you can also still blow off when not in boost.

If you have valves on both hot and cold pipes, in essence you are are venting your entire intake system so that you MAY experience a bigger lag with our tiny turbo's before you're back into boost - especially on a fast gear change you might notice the lag.

Finally, after running the turbosmart dual port for about 1.5 years, I've had virtually NO turkey and a nice normal pssht, and I've stalled maybe 10 times in that time. I found when trying to run the dual port full recirc that the plate that comes to block off the venting part is a hair too thin, and that when fully attached it dents in the piston chamber causing the piston to jam. I had this happen on 2 separate valves, both were covered by warranty. If the piston is jamming, you will of course get crazy turkey. My dual port is located on the cold pipe about 10" from the throttle body.

 

[HeHateMe]

When you mentioned that the piston on the DOV would jam, would that cause it to stay stuck open or closed? I don't think that mine is jamming cuz i have it set on the softest setting, and and i know that its working. I actually feel that air coming back out my Short ram intake, when its recircing. Its hard for me to belive that its still surge that i'm hearing! It seems like the only true way to get rid of the turkey, is to move the maf, and vent. All i know is i'm not stalling, and the "turkey" freaks the crap out of people. Which i think is funny.

 

[Hypnotized]

I have the MAF relocated with a Greddy types s venting. I have had no stalling issues ever. The car runs perfect without the turkey. The turkey has been dead for awhile now. I alos used to have a forge BOV on the hot pipe and didnt have the turkey either. Just my 2 cents.

 

[tiwing]

in my case it stayed closed - because the ends of the little bolts actually acted like a clamp holding the piston closed. I think if it was jammed open you'd know because your turbo would spool like mad and you wouldn't be building too much boost - all the air would either be recirculating or venting and not making it to the throttle body.

Well all I can say is that my turkey is virtually dead - I still occasionally get it when either not under boost or very very low boost and partial throttle lift off, where the pressure difference between the IM and cold pipe isn't enough to open the valve. Bottom line is mine works. Here's a pic of my engine bay so you can compare your setup. Good luck with killing your turkey!!



[edit: I just thought of something else - when i installed my hardpipes I had my vacuum source for the wastegate changed to the hot pipe right after the turbo. That means I have a dedicated vac source for the BOV from the intake manifold. When I tried to run both the wastegate and this BOV off the same intake manifold vac line I had HUGE turkey come back. the turbosmart dual port needs a lot of vacuum to work properly, so maybe that could be at least part of your problem. If you're wondering the reason I changed to running the wastegate vac source off the hot pipe was to provide more immediate response to the wastegate to totally prevent boost spikes - and it allows the boost controller a more immediate vac/pressure source to work from so it responds more quickly as well. /edit]

When you mentioned that the piston on the DOV would jam, would that cause it to stay stuck open or closed? I don't think that mine is jamming cuz i have it set on the softest setting, and and i know that its working. I actually feel that air coming back out my Short ram intake, when its recircing. Its hard for me to belive that its still surge that i'm hearing! It seems like the only true way to get rid of the turkey, is to move the maf, and vent. All i know is i'm not stalling, and the "turkey" freaks the crap out of people. Which i think is funny.

 

[HeHateMe]

Ok, I will try to give the BOV a dedicated Vac source. As of now i'm hooked into the line that went to the stock BPV. I think this is the line that goes to the wastegate that you were talking about. So i will try that to see if that helps. Thanks for the Info!!

 

[exNeon]

sounds ideal

 

[CasopoliS]

lol you are bumpin all sorts of old threads I am subscribed too.

 

[vxfilmer1000]

Move the MAF

One of the best mods I have ever done to my MSP.

 

[Run for Cover]

any hows on moving the maf?

 

[exNeon]

yeah there are just search for maf relocation or maf relocate, should come up with a bunch. some say that gas milage goes down, but turkey is killed and stalling as well.......i would be more interested in running a 2 bpv setup.
if anyone knows if this kills the turkey and can confirm no stalling, that would be very helpful.

 

[PlatinumMSP]

relocate the maf and vent to atmosphere, and be straight up gangster

 

[Bakum]

yeah there are just search for maf relocation or maf relocate, should come up with a bunch. some say that gas milage goes down, but turkey is killed and stalling as well.......i would be more interested in running a 2 bpv setup.
if anyone knows if this kills the turkey and can confirm no stalling, that would be very helpful.

After reading many post like this, I beleive the Dual Setup is best because it removes turkey and stalling. I Haven't done my dual setup yet, but everybody seems to have the same results.

 

[tallrd]

ditto on relocating your maf. No stalling and bypasses the problem all together.

 

[Bakum]

Well, I got my dual setup on, but the HKS on the Cold Pipe doesn't seem to be working. I have it setup like this:

I have the Stock BPV Recirc to the Intake, and the HKS Welded to a Aluminum Cold pipe. I can hear the Stock BPV recirc. but it seems as though the HKS is doing nothing. Any Suggestions.

Here's some pics.

 

[VA03Speed]

So I woudl like to know if the dual bov setup or the relocation of the maf is the safiest but best way to go?

 

[speedcicle]

I am running the maf relocation and a greddy rs. The maf relocation smoothed the entire car out and the bov sounds awesome.

 

[otmsp]

I`m recirculating a greedy s-type after venting for 2 years.Turkey is loud as hell and i love it! . VIVA EL TURKEY.

 

[tallrd]

Well, I got my dual setup on, but the HKS on the Cold Pipe doesn't seem to be working. I have it setup like this:

I have the Stock BPV Recirc to the Intake, and the HKS Welded to a Aluminum Cold pipe. I can hear the Stock BPV recirc. but it seems as though the HKS is doing nothing. Any Suggestions.

Here's some pics.

I think your problem is your vacuum source for both the HKs and the stock bpv.

I use the stock vac source for the stock BPV for just that: the stock bpv. But i have dedicated vac source off my brake booster line for the (greddy) bov on the cold pipe. Mine works awesome and runs super smooth with a massive "pffoooshh" from the greddy under heavy throttle.

I don't think you have enought vacuum for both valves off (what appears to be) the source for you stock bpv.

Am I on to something spinning my wheels?

 

[Brian MP5T]

MOVE The MAF.