for those of you that are at high altitude, do you have your mbc setting at a little higher than it would be at sea level? If so about how much higher? about 2-3 psi is what i've heard is ok.

 

You should be careful with this at altitude. Your boost gauge is probably expecting atmospheric pressure at sea level for its "zero" point. If you look at your gauge when the car is off, you'll probably notice that it reads less than zero. So if you set the MBC based on the boost gauge, it will likely be higher than you think.

NOTE, this isn't really an answer to your question, just another thing to think about. I have mine set 21.5 to 22 on the gauge, which means I'm probably at 23 or so.

 

I have heard that the boost on your guage is probably higher than what your actual manifold PSI is anyways. I have mine set at 23-24 psi, but my actual manifold boost pressure is probably only like 21 psi.

But I heard it's okay for this elevation, if we went down to sea-level we would have to adjust it by going down to 21-22 on the actual guage.

 

im with Smokey on this, I've been told I can safely set it at 23-24 psi at our altitude because the actual is only like 21psi. but if I went down to sea-level I would have to lower it. What are your mods smokey?

 

TBE, Hallman MBC 23.5psi on guage, Stock intake with K&N cone filter, IX BOV, Fuel rail, fuel pump, full I/C piping, SAFC-II, dyno-flash.


and you??

 

I have Dynoflash, forge mbc - just installed and have it set to 22 currently, everything else is stock. Will be doing exhaust some time down the road.

 

have you dynoed? if so where? and did they tell you your manifold boost pressure or where they reading just of your guage?

 

I have not dynoed yet, I just got a baseline Dynoflash when Al came to CO Springs. I'm getting my reading off of my boost gauge. If you don't mind me asking, where did you dyno at? how much? Did they tell you your manifold boost pressure?

 

i run about 23-24 but i also have all the fuel mods for it and tuned for it. i think u would b ok as long as ur not catching knock and such.