Can anybody let me know either here, via PM or to scott.555@tiscali.co.uk what the difference in duty cycle are likley to be between a VF28 and TD04 boosting to 1.2bar (held on the VF28 and tailing off to 1bar on the TD04).

How similar are they w.r.t boost control as I am trying to establish if a good TD04 duty map can be tweaked by mechanical means to run a VF28 i.e actuator adjustment/restrictor sizing......

I'm already running 1.3bar peak, 1.2bar held...then tailing off to 1bar on a TD04 using ECUTEK, restrictor re-sizing and actuator twiddling.

Don't worry though...YES I am running a KL and AFR.

 

With the same restrictor, the duty requirements in the midrange are similar, but the VF28 will hold it more easily to the top.

Make sure your fuel pump is decent.

 

So if I can get away without pulling any timing I may be able to work with the TD04 duty.

I doubt I'll be able to get away with running the current timing, but worth a go I suppose.
Last resort would be to use a MBC and drop the target boost a little.

 

You'd be better using an AE802 with a fuel cut defender/MBC and a load of octane booster. With an exhaust including manifold, good induction, new age STi TMIC and a fuel pump I think you would get to about +100 BHP on standard.