75 wet shot - SRT Forums

DARKSRT03 · 07-20-2008, 02:54 PM

Hey guys. i need some help. i have a complete nitrous setup, purge, heater, air fuel safety switch, window switch.etc. i want to spray a 75 shot.. i have seen guys on here do this but not on the boost im on. im currently running 20-21 dropping to 15-16psi. im aiming for 350-400whp i have seen people hit 360 whp with an intake and an exhaust running 15 dropping to 13. i also heard a guy from n2mb made 411 and 468 on my setup but i dont know how much boost he was running. i just want to know if is safe to run this setup on my boost, and what kind of numbers will i be looking at ?

my mods are

AEM CAI
KINETIC WASTEGATE
3"O2 HOUSING
3" TURBOBACK
HARD PIPE WITH GREDDY RS BOV
BIG FMIC
STAGE 1 ECU
WALBRO FUEL PUMP
MOPARSTAGE 2 INJECTORS (GOING IN WITH NITROUS TO KEEP FROM LEANING OUT)

04inred · 07-20-2008, 03:11 PM

How are you hiding the spike from the PCM. Also you shouldnt need the S2 injectors you should tune with the fuel jet. Lower the spike while your on the spray it will get you good power. I spike17 and got 359hp,thats with out an exhaust.

DARKSRT03 · 07-20-2008, 11:54 PM

my wastegate is wierd i have adjusted it ten times and still spike the same do you think i will be ok with that spike. i am aiming for 400whp

MTall190 · 07-21-2008, 12:08 AM

lower your boost, just adjust your wastegate alittle more and more until you get a good 17psi spike or so then spray, it will probably be oyur best bet...20+psi on S1 + SPRAY = too much timing and BOOM! be careful, i dont want to see casper actually turn into a ghost

DARKSRT03 · 07-21-2008, 03:05 AM

good lookin out MT i knew i could count on you to chime in lol. i guess im just going to have to lower the boost and go with a bigger shot if i want more power.

04inred · 07-21-2008, 06:45 AM

Quote: Originally Posted by DARKSRT03

good lookin out MT i knew i could count on you to chime in lol. i guess im just going to have to lower the boost and go with a bigger shot if i want more power.

The HP will be fine but your Tq will be well in to the 400s and that is hard to keep on the ground. The 359Hp that I got came with 440 Lb-Ft of Tq, at like 4200 rpms

.

DARKSRT03 · 07-21-2008, 11:12 AM

damn 440 ftlbs. that car must be a rocket

Rhunter · 07-21-2008, 01:22 PM

Spiking 20 PSI? was the car retarding timing at all? Hmm. anyway, lower your boost a bit. You will pick up a pound or so when you spray so that's why you need it to spike @ 17/18. Have fun, nitrous is like crack!!!

jasonparson · 07-21-2008, 07:57 PM

And all this could be done on stg1 injectors? Just re-jet the fuel side ? I am liking this idea. I had spray on my other car, sold the kit b/c car wasnt worth it. Seems like such a good idea on a srt-4

Rhunter · 07-22-2008, 04:57 AM

Quote: Originally Posted by jasonparson

And all this could be done on stg1 injectors? Just re-jet the fuel side ? I am liking this idea. I had spray on my other car, sold the kit b/c car wasnt worth it. Seems like such a good idea on a srt-4

Stage 1 injectors will be fine. If you A/f is ok prior to spaying, most likely you will be fine with nitrous if not a bit on the rich side.

Bottom line is you tune with the fuel jet. To rich, goto smaller jet. a bit lean, go to bigger jet.

SRT-4's are perfect for nitrous. A match made in heaven.

vcious · 07-23-2008, 01:30 AM

what about on a bigger turbo? is there a certain limit to how much boost+50-75 shot you should run? or does it not matter if you can control timing? dont mean to threadjack, just have a similer(sp?) question. thanks

Rhunter · 07-23-2008, 05:01 PM

Quote: Originally Posted by vcious

what about on a bigger turbo? is there a certain limit to how much boost+50-75 shot you should run? or does it not matter if you can control timing? dont mean to threadjack, just have a similer(sp?) question. thanks

It's all about AFR and knock retard. We cant' give you a specific amount of nitrous to use or not use. If I had a big turbo car, I would want some type of engine management. Even on lower boost numbers the effiency of a big turbo moves more air than a stocker.

I've seen a few SRT-4's blow up because they did not take timing into consideration when tuning.

Mini Hemi · 07-27-2008, 08:27 AM

Quote: Originally Posted by Rhunter

It's all about AFR and knock retard. We cant' give you a specific amount of nitrous to use or not use. If I had a big turbo car, I would want some type of engine management. Even on lower boost numbers the effiency of a big turbo moves more air than a stocker.

I've seen a few SRT-4's blow up because they did not take timing into consideration when tuning.

Good advice, this is why I'm waiting for a AEM FIC before I spray!!