Blow through MAFS?

[skillzilla]

Here is a pic of an RB20 in a 280Z, owned by a guy in Atlanta. Check out the MAFS placement. I wanted to do this to finally give my atmospheric BOV the finger, but thought it wouldnt work for some quarky Nissan reason.



So I guess it works fine, anyone else running this setup?

[skillzilla]

Oh BTW, I have a Cefiro motor and no stock BOV, so mine is on the hotpipe. Guess this wouldnt be any good for R32 motors.

[SeVa-S13]

I've ran a blow-through on a KA and a FWD SR, and plan to on the next RB; works fine for me. Carl also did/does the same, except his MAFS was leaking like a mofo for a while.

[skillzilla]

Awesome, Imma have to get on this then. All I need is a sawzall and some couplers

[Chaos the Xile]

So the MAF connects to the cold side of the motor? I wanna try this to on my RB25 but I have a custom intake plenum, so I don't have to cross pipes.

[krayton]

i ran blow thru for quite awhile with the rb25

no problems

[Kansei240sx]

Most people run it on the hotside becuase if you stick it to close to the throttle body and BOV, the air that surges or rushed backwards goes back through the maf, and the ECU ****s a brick and your car does retarded things.

[krayton]

never really had a problem with that. i closed the stock bov location and moved it down near the intercooler.

so when i would let off throttle the air would rush back through my maf then to the bov.

few people told me i might have problems, but i never (ie my maf would explode under pressure)

the whole reason i did the blowthru was so i could open bov. which would require the air to come back and go through the maf.

[Chaos the Xile]

ok so heres my motor what would be the best way to set up a blow thru maf?

[krayton]

well why are u guys wanting to run blow thru??

i see your bov right near the tb. are u having problems with it?

if your bov is ok then leave it on the hotside. a problem with blowthru is making lil brackets to hold it in place. but the only real reason i see going blowthru is to take care of the open bov

[Carl H]

ok so heres my motor what would be the best way to set up a blow thru maf?

fix the spahgegtti intercooler piping and redo it while plumbing the maf on the coldside of the intercooler.

i run a blowthru maf on my car mainly to stabilize the cam idle as well as reversion problems i could have with the large turbo.its not neccisary but it does allow you to vent your bov to atmosphere, big whoop.

[Chaos the Xile]

fix the spahgegtti intercooler piping and redo it while plumbing the maf on the coldside of the intercooler.

i run a blowthru maf on my car mainly to stabilize the cam idle as well as reversion problems i could have with the large turbo.its not neccisary but it does allow you to vent your bov to atmosphere, big whoop.

I was going to do that soon fixing that piping was first on my list, now on the coldside how far/close to the Intercooler should it be? And where do you have your BOV at Carl? Hot or Cold side? Pics would help I'm more of a visual person that auditory.

[Carl H]

idealy you should have the maf atleast 8" away from the throttle body to prevent reversion thru the maf when the tb closes, so usualy it ends up being in the passenger front gaurd area under the battery tray.you put the bov on the hotside so it wont interfere with the maf reading, it wont vent air quite as quickly as if it were on the coldside but it will still work.

[krayton]

found my old threads

zerothread?id=112020

zerothread?id=117594

[Chaos the Xile]

found my old threads

zerothread?id=112020

zerothread?id=117594

Thanks for the Research For those links man. Hey what type of turbo mainfold was in that pic?

[Shocker]

found my old threads

zerothread?id=112020

zerothread?id=117594

is that tin foil.. o.O

[krayton]

lol heat wrap.

track runnning in the summer desert heat was boiling my engine bay.

and those were all manifold adapters that i was playing with.

[Shocker]

i dont know, i didnt think they sould heat wrap at the local grocer... lol ive never seen heat wrap like that before, normally its the cloth type deal... lol

[300Plus]

I havent completely tested mine yet but seems good for me, my maf is on the coldside about....8 inch from the TB and the BOV is on the hotside a12 inchs before the intercooler and seems to be perfect so far.oh and make sure the air hose that feeds the IAC valve is after the maf or it wont idle correctly if at all

here a before clean up pic