Anyone who's using a MBC please read. i need some help.

[reddeerspeed3]

i installed a Perrin MBC today using Laloosh's how-to on M24/7. dialed out the MBC to the minimum setting and went for a drive. 3rd gear still makes 19psi then cuts. took the ball and spring out of the MBC to try and run the car on straight WGA spring pressure. 3rd gear climbed even faster and hit 21psi before cutting. i cant see any kinks in the vac line, and everything looked good after i finished putting the turbo inlet back on, but i'm not ruling that out yet. i have two other theories as to why this isnt working for me. A: i bought 3/16" vac line instead of 1/4" (cuz i'm dumb) and this is restricting pressure to the WGA. B: i need to remove the restrictor pill from the turbo (and how do i?). i'm leaning more towards option B, but i could just be missing something simple. any advice, speculation, and help is welcome. TIA

[superskaterxes]

Originally Posted by reddeerspeed3 B: i need to remove the restrictor pill from the turbo (and how do i?). TIA

this is exactly what u need to to. u cant run an MBC AND a restrictor pill because they fuck with each other. no body seems to understand that and i have been one of the only peopel to every successfully run an MBC on this car with NO SPIKE and NO CUT @18psi. what you need to do is instead of using the stock nipple on the compressor housing you need to tap a boost only source (ie in your hotpipe). this is what mine looked like when i had it.



trust me this works like a charm and i never had cut unless i was more then 20psi. best part was i would hit 18psi on the dot with zero spike and the car ran better then it ever has. gl and shoot me some more questions if u have them.

[reddeerspeed3]

what are the chances of fucking something up if i drill the pill out? a small easy-out should do it i hope...

or is there any reason why i shouldnt tee the vac line to the BPV to get pressure for the WGA?

[ElBartoRex]

Originally Posted by reddeerspeed3 what are the chances of fucking something up if i drill the pill out? a small easy-out should do it i hope...

Don't drill the pill out, it would be a PITA and you would never be able to go back to stock. Because the pill is built into the compressor nipple you would have to pull the turbo to drill it out.

Superskater is right, you need to plug the stock nipple and run from a pressure source post turbo (manifold, ic pipe).

I did this with a Hallman PRO Rx for a very long time at 17psi w/ no spike or cut and the turbo spooled super fast.

[reddeerspeed3]

anyone?

[martyxattack]

how comes no ones mentioned this before with who knows how many people running mbcs

[ElBartoRex]

Originally Posted by martyxattack how comes no ones mentioned this before with who knows how many people running mbcs

because this is old news..there were write-ups and diagrams on this like 2 years ago on 247.

[reddeerspeed3]

thats what i'd like to know. i took pics to do a how-to and i'll be sure to include that little 'technicality'

[skeeter149]

bump

[reddeerspeed3]

i got it figured now i think. a little getto but it should work till i get something better made. thanks for the help guys

[reddeerspeed3]

it was never included in any how-to's i found on m3f or 24/7. and i dont even visit those two unless i'm looking for something i cant find here. too many idiots arguing about useless shit.

[SneakyP86]

Originally Posted by reddeerspeed3 it was never included in any how-to's i found on m3f or 24/7. and i dont even visit those two unless i'm looking for something i cant find here. too many idiots arguing about useless shit.

Well thank goodness you'll never find any of that here.............LMAO.

[Element]

How did you tap the pipe?

[reddeerspeed3]

i drilled it out 1/16" smaller than the fitting, and then used a brass nut on the inside with red loctite. i put a small o-ring over the fitting on each side of the tube. i dont think its 100% airtight but i cant hear anything leaking under boost.

[Element]

Originally Posted by reddeerspeed3 i drilled it out 1/16" smaller than the fitting, and then used a brass nut on the inside with red loctite. i put a small o-ring over the fitting on each side of the tube. i dont think its 100% airtight but i cant hear anything leaking under boost.

And this solved your issues with inconsistent and spiking boost?

I'm not running an MBC but am debating it. It would be nice to have a consistent 18PSI.

[reddeerspeed3]

i'm making ~13psi in 3rd with the MBC guts removed, and 16psi with the MBC on its minimum setting. i used to get boost cut 4-5 times in each gear at WOT, now i cut once or twice in 4th and 5th. some quick logs last night look like i'm getting fuel cut though, not boost cut.