awilson40

We actually had a cool morning (56 degrees) so I did some Gtech runs after doing some on a 70 degree day and saw a big increase. But it was due to the boost being a little over 1 psi higher. The accuboost mbc is set for 16 psi (warm weather) but I will develope a bit over 17 psi when its cooler.
A thought.... the MBC is getting its signal from before the innercooler and the boost gauge is connected to the manifold, could it be that the innercooler is just more effective in cooler air??? The MBC would be opening at the same PSI, but the innercooler would be dropping the charge temp further resulting in denser air and more boost.
If this is the case, then taking the signal for the MBC at the manifold would be more accurate and give more consistant boost control.
Any Thoughts???

toddk911

Yes. Yo ucan do a search on this. In regards to tapping MBC line to wastegte after the IC. I have mine this way.

awilson40

Do you prefer this way? Did you notice any other changes by moving the MBC tap?

toddk911

I did not do before and after tests.

It was merely a decision based on physics. If you run 15psi and there is a 1-2 psi minimum drop via the intercooler, then you should tap after the IC, therefore, the 15 psi that you are generating, is actually getting into the intake. Otherwise, if you MBC is before the IC, it see's 15psi, then opens so only about 13-14psi is actually making it's way to the intake.