DWUR is not the worst idea... but which one?
 

Can anyone direct me to a good DWUR?

I've read about one, and only one, and now I can't even find it.

By the way, yes, I searched and found the thread on DWUR with over 1,000 posts.
I'll read through it all eventually, but is there still only one company making a DWUR?

I have a greddy controller with frequency valve for sale, same unit I sold stup.
Works excellent, $550.

http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/461843-meter-head-flow-adjustment-question.html

Doe the Greddy use wide band or narrow band 02 sensor?

Its programmed using map, rpm and frequency valve settings, It doesn't use a 02 sensor for input.
I used a zeitronics data logger with a wide band 02 for the air fuel readings.

Thierry has written a nice way of controlling your system

http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/482246-electronic-cis-fueling-boost-control.html

BTW: the DWUR doesn't use on o2 sensor, either...

Thanks, I'm learning.

Wondering what to do between now and EFI, and if I even want EFI.
I've been disappointed with the fuel curves of most EFI tunes so far.
There just seems to be no solid solution, and every system is a compromise.

I match the fuel head and WUR to each other and the needs of the engine. If you are pushing less than 375WHP the stock fuel head can remain unchanged, the WUR made adjustable and then tuned to the correct curve for your mods. It takes some time to dial it all in but the resulting curve is very close to EFI if not identical to most. There is also the option to have the WUR rebuilt with a custom curve, plug and play and forgetaboutit.
Personally I don't like the digiWUR due to the failure mode having the possibility of leaving you stranded or running dangerously lean. Mechanical WUR failure mode is typically a slow deterioration in performance of the device.