Hahn 20g/16g owners? Post your dyno and setups here! - Page 62 - SRT Forums

daniel427ss · 06-15-2008, 11:06 AM

Quote: Originally Posted by nutz

the 12's are gona need a bit more fuel, but a n2o wet shot is 100% stand alone (no injector adjustment needed), it depends on what your fuel system consists of.

do you have fpr/rl ? 1:1 ? YES
what are u controling fuel with ? DTEC
what brand injectors ? got stg2 n dont know if 650s or 750 is too much
what stage r u running ? stg2

you will definatly need the big pump!! got the 255 walbro

i dont see any reason for anything more than 650's seeing as the are more like 750's @ 58#

there it looks ok??? now what i dont know is if im gonna need something to retard timing(idkhowtodothat) or pcu does it by itself?it should i guess

daniel427ss · 06-15-2008, 11:09 AM

Quote: Originally Posted by 909Sxt

right now I'm runing pig rich on my dw650's and m10 meth so it all depends on what you want to do, truthfully I would say you won't need anything more than 650's unless you plan on building the motor and stuff then I would say go for the 650's. Also depending on how much you dyno on 23-24psi nitrous bumps up your boost alteast 2-3psi so in reality you might be runing 26-27psi, plus you figure since we're forced induction nitrous almost doubles the shot that you throw at it, so in reality on a 75shot you might be doing around 120shot somewhere around there lol

sounds sweet. i used stg2s n did good for 402hp, but im running lean now with more mods, now add crane 12s.

nutz · 06-15-2008, 11:37 AM

Quote: Originally Posted by daniel427ss

sounds sweet. i used stg2s n did good for 402hp, but im running lean now with more mods, now add crane 12s.

get 650's rated @ 43.5 just turn the fpr to around 48psi that will match the stg 2 injectors use the 1:1 and that should take all your lean problems away and let you run rich up top, u might need to adj pressure or better yet pull a little with your fuel computer! to lean it out a bit cause at 20 psi your injectors turn into 800cc flow rate (actualy not realy but it compensates for the resistance of boost)

the perfect a/f ratio will be 11.5 at full boost any more will not help out
and 13 a/f to 10 psi leaning out to 14 at 0psi, but past 10 psi going rich till full boost of 11.5 afr
"u may need some octane booster or high test"

using the 1:1 on mopar injectors makes em a bit unstable @ higher pressure (the pressure will bleed fuel when closed)
stg 2's are rated at 58 psi so they are realy 590cc injectors @ 43.5 psi "standered rating"

there is no way to retard without a timing computer, msd makes some nice ones (they can only retard) if your doing a 75 shot no retard will be nessacery just use some race fuel for saftey and get some colder plugs!!

SebringLX · 06-15-2008, 04:49 PM

Quote: Originally Posted by nutz

there is no way to retard without a timing computer, msd makes some nice ones (they can only retard) if your doing a 75 shot no retard will be nessacery just use some race fuel for saftey and get some colder plugs!!

Or stop wasting your money on piggy backs and other bandaids that just trick your PCM and get an SCT tune. Then you will have complete control over your spark map and be able to set your timing exactly where it needs to be.