[s-cars] Re: Living at altitude - Apexi and turbos

[Kirby Smith]

Scott:

Sorry for the delay, I've been moving my OS to another drive.

>I use the A'pexi mainly to keep first gear boost down to save my tranny.

What's it doing the rest of the time?

Limiting at 1.3 as previously noted, don't recall how I set the limit
vs. rpm; probably similar to stock + 0.2 kg/cm^2.

The ability of a super stepper motor to control pressure perfectly in
the WG is of secondary (if any) importance if the outer servo control
loop is controlling boost pressure.

I don't think I can get the locus of turbo states to get to the surge
line at low (engine) rpm and pressure.  However, as I don't have an easy
way to measure turbo rpm, I will never know, as the turbo map is
normally drawn as a function of turbo rpm.

I'm not sure where the 200 hp comes from in your comment.  I wish!  I'm
nominally going from the 227 hp claimed by Audi to 270 hp, maybe.  And I
doubt the A'pexi is doing anything more aggressive than the Stage 1+
some owners use.

When someone comes up with a chip set that performs the function I use
the A'pexi for, I'll consider it.

kirby