The throttle plate being closed at idle keeps the intake manifold in vacuum. It will be in vacuum even if the compressor is producing some pressure in the piping between the turbo and the throttle body.

Ok, that's what I thought. So any idea if the turbo I have will be good enough for low boost.

Not to start nor suggest I planning on this but---after reading many post on MTurbo and the many solutions to increasing fuel under boost has anybody tried just adding a centrally located injector(s). It seems that a simple injector driver ran off the original signal could then power them. Add a wide-band O2 sens and an adjustable fpr and you could tune whatever mixture you needed. Does this make any sense at all.

Its been done, but that is ancient technology.
A remote injector is not guaranteed to equal distribute fuel between cylinders, plus there will be issues with puddling and whatnot. The manifold is not designed to have fuel in it.
Also, you will have no provisions for tuning ignition timing, which will limit how much power you can make.

There is no excuse to do half-assed stuff like that when there are cheap and effective options like the megasquirt.

I know going with megasquirt solves all of that, was just curious if it had been tried. I know the timing issue needs to be addressed too, as to the intake issue, an exta bung welded into each intake runner would put the fuel where you want it. I have been reading on a number of the forums about megasquirt and have more questions than before. Need to do more reading then decide which unit is best for me. When I get to that point I will asked more questions and try to do this right the first time.

OK, I'm back. Having read A LOT of post on MT I've at least figured out that with all the bandaids needed to make a car safe and reliable Megasquirt is the way to go. Still need to keep cost down some but if I assemble it myself some money can be saved. From what I've read using MS in a piggyback capacity is a little less complicated, maybe. So my question is, with cost being a factor, Which MS will do the job for a low boost setup without breaking the bank? My car is not a track car ever, just want a little more power for easier driveability. Lots of hills where I live so a little more hp would be nice.

the one Brain makes.

+1 He will make one tailored to fit your setup and needs. The price is right and it is a complete solution. It's a real no Brain-er. :gag: