i was wondering what is the safest psi to run with a MBC for a dialy driven car. enough to feel a differnce and leave most int he dust but i dont wanna be blowing anything up either. Sorry for the noob question.
Thanks for the help.

 

I would just say at the stock setting...19 PSI especially if you don't have any other mods.

 

21psi

 

If MBC is the only mod you will have just put it to stock at 19PSI, if you've got an exhaust then set it for 21PSI.

 

21 psi is too much without tuning. Trust me I know.

 

ok i plan on gettin exhaust in a month or so. So when i set it at 19.5 PSI does that mean it will hold at that all the way to 7 rpm's?

 

first of all if you will hold 19 psi to redline without ANY tuning or fuel pump upgrade, you will go lean although not enough to blow up your car.

 

ok thanks for the help.

 

if you are still driving under stock fuel map, then i would personally set the MBC to 18 psi.. no more then that (even then ur gaining HP since ur preventing tappering down to 16 psi)

 

yeah cause it pulls real hard then it kinda feels like it falls falt on its face. i was just looking to have that pull all the way through.

 

I'm hoping 21-22psi isn't excessive for stock, as my stock MR is pulling about 21.5 psi without mods. I threw on a cat-back and saw no major differences...so I'd say somewhere between 19-21psi would probably be pretty safe.

 

19-20 will keep everything in tip-top shape... 21 isn't pushing it much, but it is pushing it... this is depending on what gas you're using... but I'm assuming it's 91 octane

 

Im on 93 here in mass.

 

Then 20-21 should be just fine for you, with no pushing of limits, my car pulls timing with the tune and 21 pounds of boost on our 91 octane here in Utah, which, like I said, isn't really that bad, but it's not really good either

 

psi has no efect on lean/rich , @ wot A/F ratio should stay about the same at any psi , excpt for when you reach the limits of the stock fuel system and the stock fuel system can handle at least 320whp . But i would not go above 20-21 psi on 93 octane