intercooling

Gregmckenna · Post by **Gregmckenna** » Wed Jun 20, 2007 4:12 pm

sorry about this Ive tried research... I have a big FMIC... ive mounted it cut everything out an its all snug into my bumper.... Ive found how id like to pipe it an want not an have ordered some pipe... now I need a MBC an a BOV...

Money is kinda tight as Im 16 an going to highschool while doing this all myself in the garage. I know there is a difference between a bypass valve and a blow off valve... if im correct then the bypass valve is constantly open thus it must be ented back throught the intake. A blow off valve is not open all the time and only opens when u shift or let off the gas....thus it will only run rich just after boost has bin made ??.... so my second question is will any ebay "blow off alve" work or do I have to check to makesure its not a bypass valve an also I noice how to plum it into the intercooler pipeing but still have no idea how to go about hooking the blow off valve to my intake or turbo.

Also does i really make a hugh difference which MBC I get or can I just get a cheap one... i know it wont ave a ceramic ball or anything but like I said moneys kinda tight as Im also trying to paint the car and do the exhaust right now

thanks for your time

Gregmckenna · Post by **Gregmckenna** » Wed Jun 20, 2007 7:16 pm

why wont this work an if I buy it I will only run rich when shifting or backing off after hard boosting correct?

http://cgi.ebay.ca/Turbo-TYPE-RS-BOV-Bl ... dZViewItem

gto7419 · Post by **gto7419** » Wed Jun 20, 2007 8:28 pm

First, you need to space things out when you type or it gets hard to read....

A good mbc will have the spring set so the valve closes if the spring breaks - instead of letting you boost away.... Research before you buy....

Trust me on this - unless you have the PROPER engine management for it, the absolute last thing you want is a bov - you WANT and NEED a bpv.

When you run atmospheric (non-recirculating) your car will run super rich after every shift causing all sorts of problems....

Its easy to say, "yeah, it will only make it run rich here or there..." but when your car runs as if a 400lb fat chick is jumping up and down on your hood, you wont be happy....

Danny

n2x4 · Post by **n2x4** » Wed Jun 20, 2007 9:55 pm

A good MBC is only like 70 bucks. It's worth it.

You're right about the BPV and BOV. You can recirculate some BOV's though. You could reuse the stock BPV. I would. I ran my stock valve atm. when I installed my TMIC and yes, it runs wrong/crappy.

I say buy good MBC, and reuse the stock valve. You can buy a piece of IC pipe with a hole in the side to attach your valve to, just install it close to the throttle body.

EDIT: Here's a pic of how your stock bypass valve could be hooked up. This is on a TMIC, but same principle for a front mount:

http://bbs.legacycentral.org/viewtopic.php?t=29944

Gregmckenna · Post by **Gregmckenna** » Thu Jun 21, 2007 4:09 pm

thanks guys... do you think it be a problem to run my stock bpv for

the time being im not looking to run over 12 PSI. The manual

boost controller I bought was a cheapy but i did makesure that if

the screw loosened off it didnt throw my boost up.... if the screw

loosens off or anything like that the boost level will drop to stock.

I know this is kinda irrelavent to the questions ive had befor but i

bought my car second hand, the guy had an engine put in and did

a shitty job IMO. half of the vacum lines are either broke or none

existant. I have fixed them all with the exception on the charcoal

canister and a vent line. I cannot for the life of me find out were

this line goes. Its at the front of the passangers side valve cover,

runs back along the valve cover until it reachs the back side ( were

the other vent line is that runs to the intake) then abruptly ends

with a T on the end. Im thinking this must go somewere and is

causeing me a boost leak

gto7419 · Post by **gto7419** » Thu Jun 21, 2007 7:37 pm

hehe, you took me a little too seriously.... I meant that you basically shouldnt clump huge sentences together....

I would actually go outside and take a picture for you right now, but I have a feeling your car being a factory turbo will be different than mine....

biggreen96 · Post by **biggreen96** » Thu Jun 21, 2007 9:15 pm

Heres a pic I just took,

which hose are you talking about?

Gregmckenna · Post by **Gregmckenna** » Fri Jun 22, 2007 5:45 am

I love you... mines running the wrong way thats probably why I cant find it... the one connected to the front of ur valve cover that is runnigna crossed the front of the engine

biggreen96 · Post by **biggreen96** » Fri Jun 22, 2007 5:49 am

sweet. I'm glad that helped out.

Gregmckenna · Post by **Gregmckenna** » Fri Jun 22, 2007 10:13 pm

yea \i still have no idea were it goes tho lol.... going to try an rip my alt an waht not off today to get a better look

biggreen96 · Post by **biggreen96** » Fri Jun 22, 2007 11:37 pm

that hose is a crank case breather hose, it connects behind the alt and then connects to the drivers side valve cover at the back. 3 connections total, and they are connected by a weird plastic tee. Subaru and their weirdass plastic pieces...

Gregmckenna · Post by **Gregmckenna** » Sun Jun 24, 2007 7:26 am

lmao Ill take a pictrure tomorow it apears as if the drivers side peice connects directly to the block vent hose behind the alt... an the tee is non existank so Im gonna have to figure somthing out...

biggreen96 · Post by **biggreen96** » Sun Jun 24, 2007 11:08 pm

what is the drivers side valve cover vent connected to then? Weird setup you have there.

Splinter · Post by **Splinter** » Sun Jun 24, 2007 11:16 pm

I dunno what all the fuss is about with running atmospheric.

Me and my friend Tyson both ran a dual-chamber atmospheric Apex'i BOV with no problems.

Gregmckenna · Post by **Gregmckenna** » Sun Jun 24, 2007 11:25 pm

whatever Im not running atmospeheric an instead of having a T the drivers side valve over is connected leaving the passangers side just open an in the wa I guess lol

gto7419 · Post by **gto7419** » Mon Jun 25, 2007 12:54 am

I have a wideband attached to my car right now - I had the bov going atmospheric and the car ran like total shit... Went crazy rich after every shift and bogged when in the next gear.

Plumbed the bov for recirculating and even with the air leaks I have, the car ran almost perfect.

My air leaks have since grown and the car is running rich again....

Jb weld sucks a lot of the time, but its perfect for stuff thats already tack welded on and just needs to be sealed....

Danny

legacycentral bbs

A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

intercooling

intercooling