95 cobra, Nitous Kit concerns

NJcobra94 · Jan 16, 2013

So im gonna be ordering soon and running a dry kit on my car this upcoming season..... its a stock bottom end cobra with b303 cam (which is pretty small .480 lift i think) the rest of the car is bolts on's, long tubes, h-pipe, msd 6al ingniton box, the normal bolts ons..... i was wondering if a 100 shot was gonna require a better fuel system, and what should i do as far as tuning..... the cobra came with 24lb injectors but the computers really weren't calibrated well for the extra fuel over the 19lb gt injectors, as my car runs rich as it is....

the5.ohh · Jan 16, 2013

If your cars running pretty rich I don't think it'd be wise to spray it until you get it properly tuned.

RichV · Jan 16, 2013

Put in a 255 pump and spray away. Probably get on the rollers with anything above 125.

Make sure your dry kit raises the fuel pressure. I actually knew someone with an ebay kit that did not, which is no-bueno.

RichV · Jan 16, 2013

the5.ohh said:
If your cars running pretty rich I don't think it'd be wise to spray it until you get it properly tuned.

Rich is much better than lean. Fer sure!

the5.ohh · Jan 16, 2013

So did what I write be somewhat accurate or I probably have no clue what I'm talking about lol

Musturd · Jan 16, 2013

Personally I'd just run wet with a 255lph pump it's super simple not really anymore difficult then a dry kit .

NJcobra94 · Jan 17, 2013

thanks guys, i'm gonna just do the 255 pump either way now... and i already have it set up with a fuel pressure gauge for the rails, and a fuel pressure regulator.. the only reason im running a dry kit is how well my car is going to conceal it, i like to have the unexpected advantage when grudge racing.... should I setup up an air/fuel gauge so i can monitor it, or will knowing i have proper rail pressure be enough to know

95opal · Jan 17, 2013

Dry is fine as long as your pump and injectors are up to par. Dont forget to grab nitrous guage and a window switch at minimum. A bottle heater and purge kit can be added also but arent mandatory.

RichV · Jan 17, 2013

Your kit should have a lne that goes to the FPR, if it does not convert it to a wet kit. Having a choice, I'd go with a wet kit as well. A wet kit requires like 2 additional feet of line and a different nozzle. You do however want a purge with a wet kit.

Anyway, gauges are good, but with nitrous it would be too late by the time you'd see a problem with A/F or FP, specialy since your gauge in on the rail.

ProKiller · Jan 17, 2013

agree with richV. especially if your air/fuel isn't a wideband, it's about as useful as a trash bag for a parachute.

Mrstangerbanger · Jan 17, 2013

The best thing to do would be get a custom chip made for your car from willie at dirty dirty racing or anyone that knows mustangs .. Also the B303 cam is a great cam and pulls to about 6 grand because its has more duration then say an e303 but with nos and no wideband you have no clue were your air to fuel is when NOS hits and could hurt something ..100 shot of NOS is like 6 pounds of boost so its not a crazy amount but i would do it right the first time .. Get 255lb pump make sure you have 24lb injectors and install a wideband air/fuel gauge .. Then get a custom chip and go have fun .. Hope that helps .. Email willie at dirty dirty racing .com guys amazing and can tell you exactly why having a chip will make things way better.. Or just run race gas everytime you hit the NOS and you will also be safe .. But the car needs a chip without the NOS and that is the reason its runnng rich inless its a cobra computer and the computer is calibrated for 24lb injectors ??

Musturd · Jan 17, 2013

Like opal said you will want a window switch one missed shift and all hell will break loose with out one . I ran my car for a whole season with out one just waiting for the day I missed a shift . It's a good idea to run one shade cooler plugs as well.

I know what ya mean how you can hide a dry kit pretty easily

NJcobra94 · Jan 17, 2013

thanks guys, I picked up a nitrous pressure gauge today... Ill have the 255 pump soon.... as far as custom tunes and chips go, I know a lot of people either love me hate em.... personally I can't stand them do to the fact that the sn95 computer is complete garbage.... all my tunning is done the old fashion way with adjustable fuel pressure regulator, and msd fuel pump voltage output box....

Musturd · Jan 17, 2013

There's nothing wrong with the sn95 computer

ttocs · Jan 17, 2013

I have a nos bottle with some really nice billet mounting brackets, bottle heater if you are interested pm me.

NJcobra94 · Jan 17, 2013

well there's nothing wrong with the computer themselves... they're just a absolute pain in the ass when throw more fuel and air into the equation...... I had a paxton on my last sn with a ful fuel system, 42lb injectors, fuel cell(the whole nine yards) i had multiple shops try making a custom tune for it, and it never ran as well as it did without the chip or tune.

ttocs · Jan 17, 2013

either something was wrong with the car/system or your tuner. No reason that a properly set up up car in the hands of a good tuner can't get it set up. Not tryin to dis you or your tuners but we have more then a few on here that are running similar systems, making good power and still drivable.

Musturd · Jan 17, 2013

Yea it's either your computer wasn't taking the tunes with the custom chip . Or all of ur tuners fail at tuning

94Snake · Jan 18, 2013

i ran a zex dry shot (125 pills) for a couple years with a stock longblock with bolt ons. i put a 255 lph fuel pump in tank, adjusted the FPR just a little bit higher than stock, pulled timing at the dizzy per the instructions and added a gallon of race gas just for good measure. i don't think i needed it though. just read your plugs and be aware of how your engine sounds (to the best of your ability) and feel if it breaks up while the nitrous is on. If something doesn't seem right, lift, and try to pull the plugs to read them immediately if possible.

after i added the 347 with stock gt40 heads and cobra intake, 30 lb injecters with 255 lph pump along with a 50 gph inline fuel pump, and a SCT dyno tune....i run that same dry shot kit on pump gas only, 125 pills.

bottom line....you'll be fine...dry kits are easier to install etc etc but i wish i had a wet shot...

brian95 · Feb 14, 2013

on my first combo i had stock 302 shortblock with e303 cam 1.7 rockers gt40 iron heads cobra intake 24lb inj 75mass air with cold air
190lph intank pump 3.73 gear with zex dry kit and no tuning took out timing at dizzy and used about 2 gallons 100 and sometime 110 race gas when using the juice. sprayed 75,100,125 shots without any issues. did that all year.