ran against a few cars tonight, and hit boost cut a few times!?! Options

[BBoYRuGGeD]

aright 3sgte homies....as u all know i just got my twos r us MBC this week, installed and set to 12 psi. tonight i ran the car pretty hard in some races and twice my boost spiked to 14psi and i hit boost cut. prolly 2 out of 10 times that i full boosted i hit boost cut. had to pull over on the shoulders and restart the car to get that CEL off ive checked all my hoses and piping and everything seems to be a-OK. this happen to anyone else?

btw i ran against an s2000, wrx, and a pretty modded audi tt...no loses on my part

bboy

[lagos]

damn you guys have some pretty crazy ideas....lol


BBoy.... fuel cut happens right at 12psi. if you set it at 11-12ish, you might be fine one day, but hit fule cut the next day because the weather got colder by a few degrees. all you have to do is disable fuel cut. there are 2 ways of doing it....

1, disconeect the vac line that goes to the turbo presure sensor and put a vac cap on the sensor and a cap on the vac line that used to go to it. this will give you no fuel cut protection. just keep an eye on your boost gauge and make sure it stays under 15psi. i have had my car like this, with the same mbc for almost 2 yrs... never had a problem and the boost stays were i put it.

2. buy or build an FDC and set it up to fuel cut at around 16 psi. this will just bump your fuel cut back so that it happens later. in 93 toyota changed the fuel cut on the 3s to 16psi , so youll be doing the same thing, just with an aftermarket box.

even if you buy an ebc, youll still hit fuel cut after 12psi if you dont disable it.

ebcs are great for in car control and keeping the wastegate closed till the last second, but for what you are doing, a good dual ball and spring mbc will work great...and is used by 75% of the mr2 guys with no issues

This post has been edited by lagos: Jan 24, 2006 - 12:48 PM