take all that money you are wasting on souping up your n/a engine, and buy a turbo.
im not trying to bash on your build, by any means..
but ive always thought that hot rodding a n/a was like polishing a turd.
it might be prettier to look at , but its still a turd none the less.
take and drop a turbo in there, or even a bottle of nitrous.
propane injection in a NA is sweet. You'll need the EGT, but the propane is a catalyst to the diesel and you gain some power and torque, by getting a better burn.
bullsh*t...
i played with every aspect of my n/a before i turbo'd it.
i used to be anti-turbo bad..
superchargers were like gods balls.
propane is a waste of time on a n/a i think.
i had propane on my car for a while, and it just wasnt worth it.
aside from dumping a giles pump in the engine, i did everything else.
opened it up, better intake and exhaust. well, rather a lack of exhaust for its last bit of life as a n/a.
still, even with everything i did + propane, it wasnt that good of a gain.
you still had to measure the 0-60 time in minutes.
i wouldnt EVER play with propane on a n/a again trying to get performance out of it.
but, i know a few people who are using propane as a supplemental fuel and are getting rediculious mileage.
35 mpg from a 6.6 duramax is no small feat.