What FMU disk ?
 

I need some assistance as to what FMU disk I should be looking for. I have a d15b7, plan on mating it with a ihi rhb5 turbo if that matters. I wanted to know if anyone had an idea as to what vortech disk I should use? I don't plan on boosting much, maybe 6 psi at most since it has 162k miles and is a daily driver. Most I see are 12:1, and 8:1. I sorta understand how the FMU works im just not sure of exactly which one would be best for my personally application. I couldn't find anything with the search so I decided to post. Thanks,
Matt

Re:What FMU disk ?
 

go with the 8:1, remember the rhb5 is preset at 8psi..

Jeff

Re:What FMU disk ?
 

Couldn't I regulate this with a boost control? Maybe modifying the waste gate? Thanks again,
Matt

Re:What FMU disk ?
 

By "this" you mean the fuel ratio, no. The boost controller would be used to control boost.

Now if by "this" you meant boost controller, then, well.. You could control boost with it, but you're going to be limited by the PSI set by the internal wastegate. Yes, you could go above that. But lowering it below that would require some modification to the wastegate actuator arm (lengthening it, to save you some time).