max boost

[mikeWRX]

Check max boost in 5th gear. You pretty much need to be on the highway to do this, but that is where you will get the highest boost readings when you floor it. I get to about 65MPH and floor it to around 80.

[HRTATAK]

yea..I tried that...but this was...I guess..under more load...max boost in 5th gear has been around 16.5 psi...I tried to keep the boost conservative...the jump to over 17 scared me...is that bleed valve really needed (since an MBC is a cheap boost fix), or can I adjust it accordingly.....maybe I should just buy a EBC...

[phast]

You're running an MBC and a needle valve inline to the WG??

If you have a ball and spring MBC, then you don't need anything else. I've always heard it was one or the other. I use an MBC and have no problems. Rock solid 12psi all day and all night. No matter the weather or temp.

[HRTATAK]

I put the needle valve after the ball and spring to try to keep the part throttle/full boost in check....it doesn't seem to be working though...still get max boost in any gear at about 1/4 throttle....I have the ball and spring set to about 8 psi alone, then turned the needle valve to obtain the 16 psi at WOT...but, as mentioned before, I don't think this setup is working all that well...I am going to remove the needle valve part and experiment with just the ball and spring...BTW, should I use the turbo nipple as the source, or the BOV as a source for the MBC (as done on the boostvalve.com website)?

[phast]

I use the pressure source on the turbo.

[HRTATAK]

I just ordered a kit from a guy on i-club that uses a 2 solenoid system to switch between factory boost controller and a MBC set up to your boost settings. It uses a toggle switch inside the car. Pretty neat setup. It should work perfect for me. I'll just use the factory ECU settings when commuting to work.

[nekard]

Got a link or name for this MBC system you speak of?

[HRTATAK]

Go to i-club and do a search on the name bristolboost...you will find his system there...I should get mine by early next week and I will post my opinions on the system....

[nekard]

I searched a couple times. Do you happen to have the link to that post. I wanna see all the things that he offered with the system and exactly what it is and does. Thanks!

[HRTATAK]

just do the partial name search on i-club (with the name bristol) and you should find it. What it does is: it runs your line from the turbo nipple to a tee..from the tee to a MBC and to a pair of solenoids...from the 2nd solenoid to another tee (where the output of the MBC mets) and then to the wastegate. Your stock boost control goes in between the solenoids. With the solenoids open you are running with the stock boost control...but flip a switch to close the solenoids aand the pressure is forced to go thru the tees using the MBC. I hope this helps..it is kinda hard to explain (bristol does a better job of explaining on the i-club and uses pics).

[nekard]

That was a pretty good job but I will try to find his post again.

[HRTATAK]

You should be able to find it with the search...it seems like a pretty good system....i will let everyone know when I install mine ( hopefully at the end of this week). I think I am going to order some AEM pulleys too.

[HRTATAK]

At what RPM should you set the max boost with a MBC? I'm currently using the ball & spring followed by a needle valve (bleed valve) as mentioned by Mike. I'm asking this because I had this setup pushing about 16 psi in 3rd gear, but yesterday while driving to work I was running about 45 mph in 4th gear, floored it, and the boost gauge quickly jumped upwards of 17.5 psi. Needless to say I quickly poped the hood upon arrival to work and cranked the bleed valve down a couple of turns. What I'm asking is, what would be a way of adjusting this MBC setup...or do I just change my driving style to avoid this situation?

[kylo19]

HEY GVALLEY CHECK ## PRIVATE MESSAGES I WANNA BUY ## BOV!!!!!!!!!



sorry guys if its off topic but i hate to pass up a good deal