alright it's a turbo xs mbc, i set it to 21 psi since i bought it back in April. (couple weeks ago it was like 30-40 degrees outside and it stayed at 21-22ish) so today it was like -7 and i am on the freeway heading to the movies to see Gran Torino (bad *** movie) in 5th gear doing a "pull" and the boost level stayed at 21 for a little bit, then boost started increasing to 27psi! WTF i did turned it down same thing happens! is the cold a factor contributing to this situation?

 

yup..most likely. I'm not 100% familiar with the turbo xs but I imagine it's a ball and spring type mbc. It wouldn't hurt to dissasemble it and put a very light coat of oil on the ball bearing. I have heard of them sticking causing over boosting problems.

 

more than likely yes the cold is the issue with boost spiking

 

i hope if the cold is the case ^^ if i upgrade to a EBC like apexi, will it fix my problem? i am not familiar with ebc's do they automatically adjust to the temperatures?! during spring summer this has never happened but then again here in Michigan it's like -10 right now!!

 

idk bout the ebc i quit using mine when i was getting my tuned and have just used my mbc since

 

my tune is set at like 21-22psi

 

yeah my tune is at 31 psi the same mbc as you if you want controlable from in cabin get hallman but it is the cold

 

nice i was just considering in upgrading to a EBC

 

its boost creep, your wastegate cant flow enough air around the turbine housing. its common when its really cold out. do you have an upgraded O2 housing?

 

no i dont, but i plan to this spring, whate are the benefits of upgraded 02 housing, do i need a retune?

 

bump