T60-1
09-08-2003, 10:55 PM
#51
Junior Member
Join Date: Sep 2003
Location: jax,fl
Posts: 24
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
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
09-09-2003, 08:01 AM
#54
Senior Member
Join Date: May 2002
Location: Okinawa, Japan
Posts: 4,928
Originally Posted by little rotor' date='Sep 9 2003, 09:07 PM
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.
Just 1 question. I'm sure you told us once before but what size exhaust housing was it?
My guess is 1.15.
09-09-2003, 08:25 PM
#57
Senior Member
Join Date: Dec 2001
Location: Okinawa Japan at McDonalds
Posts: 472
Originally Posted by little rotor' date='Sep 10 2003, 09:15 AM
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?
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