first a wet nitrous system is no way affected by the boost pressures and basic tuning of the engine so you tune the nitrous and the engine separately

i believe the best wet or dry systems out there for efi are zex because it reads off the tps and it adjusts itself accordinly to throttle angle so you dont blow you engine

and on the turbo topic

depending on where you want to make you power and how much power you want affects which turbo you want



for good of the line low boost setup a small single or even small twin setup is best like a t3 or t25

for tons of low rpm power that lasts pretty long a single or double t3/t4 hybrid would work

for mid range power a to4 series will work good and still be effiecent in the higher rpm range

and for high rpm power you would use a t76 or something along those lines

it all is based on spool time and how much exhaust flow it takes to

be in the effieciency island of the turbo

learn how to read a turbo flow map

each turbo has its own pressure range that it works best in and makes the most power

sur eyou could get 25 psi out of a to4 but its not effiecent at this pressure

if you try to get to much out of a turbo its effientcy drops fast exponentially

that just my $.02

 

Igy/Dragon - that is an impressive number for 15 psi on that turbo and a SP



want to key us in on how you did it?



how much ignition advance are you running on the map and what were the intake temps like?



-Nic

 

Igy/Dragon - I too am impressed by those numbers at 15psi.

Just 1 question. I'm sure you told us once before but what size exhaust housing was it?

My guess is 1.15.

 

Nah...I think actually Jerry's car(that's the 15 psi on a t-04S putting out 460~ rwhp) is an undivided 84, but Chris can confirm that since he built Jerry's engine.

 

.96 undivided ex housing P-trim

 

Well 1.15 divided is pretty close to .96 undidived so I was close. Was it simply an extend/street port with good tuning or did you have a few more tricks up your sleeve?

 

Actually the .96 undivided is close to a 1.00 divided. The 1.15 is quite a bit larger, and was what I was running. That is basically all it is, is a good side, and half assed tuning.

 

Hmmm. You'r half-assed effort seems to have ended up better than most peoples all out spend as much money as I can effort. Good stuff.