-Nitrous Talk-

330CubeGt · Dec 28, 2010

So my new toy is a 94 GT and its bone stock, Im already looking at going with 4.10s and upgrading the tranny and converter. But as much as i wanted to go turbo, im looking at all that is needed to do a nitrous kit.

Its Cheaper Lighter and Easier to install a kit so thats a plus with not wanting the car to be down for a DIY Turbo build as i want to Daily this car for some time.

With wanting to run a 100-125 or 150 Shot what all should i do to upgrade the car with supporting mods as far as fuel? Think 42# injectors and L MAF is to much? with a 75mm t body? And a 255 Intank.

I already have plans for H/C/I Headers, CAI, T Body and some port work etc etc. Wanting to make 300 Ish On the motor and 400+ RWHP on the kit. The car is going to be daily driven like i said with trips to the track maybe 12 times total in a year on the kit So i figured with 80k on the clock it should hold up to a 125-150 shot just fine right?

What do you guys think as far as nitrous goes for a power adder as far as setups brands shot size etc etc, never owned a nitrous car so im a noob :crybaby2:

Is it true what i hear about retarting the timing 2 Deg per every 50HP Increase with the Juice?

Pure84GTT · Dec 29, 2010

255 is a good idea I have stock injectors and was smacking it with a 175

330CubeGt · Dec 29, 2010

lol. thats a first ive heard of people running 100 shots on stock injectors but not 175... How did the car run with all that juice? any dyno numbers?

JJhirsch · Dec 29, 2010

ok i am not an expert but i have read in to this alot and this is what i know of the top of my head.

NX kit or Zex kits are the best out there. The cheapest way to spray is to get a wet kit so you dont have to spend money on the MAF and injectors.

1. have to run 92-93 gas
2.retard your timing (i dont know what the rule of tumb is)
3.need a FPR to bump up your fuel as well as a fuel pressure guage (you can get one for under your hood that connects to you fuel rail)
4. With 100shot or more a 255 fuel pump is a must. (I have ran 75 shot on stock pump)
5. bottle heater is a good idea if you want to get good pressure when spraying.
6. fuel safty switch is a good idea to have so that if the fuel pressure to low while spraying it will turn your system off.
7. good thing to have is a window switch that turns the spray off at low rpms or when you take off it wont spray untill you are 2000rpm or higher. (dont spray under 2000 rpm, i always did 2500 to be safe)

These are all thing you should do to be safe in you nitrous set up

also miles on motor isnt going to matter all you care about is the car has enough fuel for the shot and you dont spray at low rpm.

Pure84GTT · Dec 29, 2010

175 was fun, no idea what it made hp wise. theres a local guy running a big shot kit on a stock long block 91 notch. pretty sure he's hosing it with a 250 ish

KAOSS · Dec 29, 2010

Here's my op.
Dont look at nitrous as being cheaper. Every year the price goes up. here in Buffalo,NY its $5.50 a lb.
I have seen alot of guys throw a sh!t load of boost from a turbo on stock motors without killing them. Most of that is having enough fuel and a good tune.
Myself, I like nitrous. Pry cause I never owned a turbo car.
If your gonna spray it, Make sure you get a wet kit. I have NX and love it!!
To be safe I would step up to 24lb injectors. You can get those cheap. Aslo, make sure you get a colder spark plug and close the gap a little.
As far as a fuel pump goes, I think you can just throw a Trex inline in frome the filter. This way you don't have to drop the tank.
If your gonna spend the money, don'y waste it on a heater. Spend the extra hundred bucks and buy a NANO system. They keep constant pressure in your bottle so you don't have to wait for you warmer to heat it back up.
If you do want to retard your timming, You can always look for an MSD digital 6. They have step retards on them.
With a stock bottom end, to be safe, I would pull 2 degrees after a 75 shot. If your ballzy you can go up to 100 shot and then worry about the timing. I would pull 2 degrees of timing for every 25 shot after 100.
75shot.......0 timing pulled
100 shot....0 timing pulled
125 shot....2 degrees pulled
150 shot....4 degrees pulled.

Be careful.. Nitrous is like crack and you can get addicted to it real quick! haha

Untame-d · Dec 29, 2010

What I have for my setup is in my sig.

Also have 2 step colder copper plugs. Platinum compound can melt from the heat and drop a tip into the motor. I'm upgrading to a 255lph next year.

I wouldn't worry about injectors with a wet kit.

There is also a good deal on a zex wet kit in classified section right now to.

ryclef331 · Dec 30, 2010

Untame-d said:
What I have for my setup is in my sig.

Also have 2 step colder copper plugs. Platinum compound can melt from the heat and drop a tip into the motor. I'm upgrading to a 255lph next year.

I wouldn't worry about injectors with a wet kit.

There is also a good deal on a zex wet kit in classified section right now to.

THIS!

Except the Zex part...i don't like ZEX kits.

All this talk about stepping up injectors bla bla bla. STAY AWAY from dry kits unless you only plan on spraying about 100shot. Get a wet kit, set it up for 125 shot, change your fuel filter, drop your timing 3-4 degrees, run premieum fuel, go down 1 heat range on the plugs and you'll be money all day. You can fuel pressure safety switch, window switch, ignition boxes, bottle heater etc. to help with making it safer and more reliable but for the occasional spurt from a stop light. The first little list will get you going safely and get you HOOKED.

Inspector13 · Dec 30, 2010

ryclef331 said:
Untame-d said:

What I have for my setup is in my sig.

Also have 2 step colder copper plugs. Platinum compound can melt from the heat and drop a tip into the motor. I'm upgrading to a 255lph next year.

I wouldn't worry about injectors with a wet kit.

There is also a good deal on a zex wet kit in classified section right now to.

Click to expand...

THIS!

Except the Zex part...i don't like ZEX kits.

All this talk about stepping up injectors bla bla bla. STAY AWAY from dry kits unless you only plan on spraying about 100shot. Get a wet kit, set it up for 125 shot, change your fuel filter, drop your timing 3-4 degrees, run premieum fuel, go down 1 heat range on the plugs and you'll be money all day. You can fuel pressure safety switch, window switch, ignition boxes, bottle heater etc. to help with making it safer and more reliable but for the occasional spurt from a stop light. The first little list will get you going safely and get you HOOKED.

3ed.

I run a NX wet kit with a Trickflow plate, bottle heater, purge, etc. I really like my setup, especially with the multibank chip that I have.

330CubeGt · Dec 30, 2010

Thanks for all the info guys!!

I might just have to get a kit and try it out on the stock pump and injectors, and see how i like it.

chaz · Dec 31, 2010

All you Nitrous guys, What shot are you spraying and what HP is it making? Im getting ready to put a 150 shot on for this race season and curious as to what others are making.

JJhirsch · Dec 31, 2010

not may people spray on the dyno so you probably wont get many number but with the zex and nx kits are the closest to the hp they say they will do.

I think off hand like 100 shot will do for sure 70hp or more to the wheels.

chaz · Dec 31, 2010

So people don't dyno tune with Nitrous? I will for sure dyno tune mine, I worry about torq numbers going to high (for stock rods and 10.5/1 CR) with a 150 shot so Ill start at 100 shot and work my way up.

JJhirsch · Dec 31, 2010

you can dyno tune your car without spraying.

chaz · Dec 31, 2010

My Car is dyno tuned without the bottle 281HP, but I would want to see the AFR's when dyno tuning and also want to see the torq numbers to see where to set up my auto to shift and make sure the torq is not over 475.

330CubeGt · Jan 2, 2011

JJhirsch said:
you can dyno tune your car without spraying.

You can if you never plan on hitting the car with the juice..

Whats the point of getting a N/A Tune and then just crossing your fingers that the A/F is good and hitting it with a 150 kit..If you backed the timing up and had a wet kit and was around a 100-150 shot i guess you could dyno tune it with out the spray but i would want to see what it puts down with it personally.

Untame-d · Jan 2, 2011

I will be dyno tuning mine next summer. Hoping for close to 400 whp with spray.

330CubeGt · Jan 2, 2011

Shoulds be, Im still on the fence about what power adder to go with.

From what im reading i can keep everything bone stock put a single turbo on the car and put down over 400 to the tires and damn near 500 Ft/lbs with just 10 Psi. That would put me where i want to be for power and id never have to go into the motor to change cam heads or anything like that as i was thinking about doing to help with the spray.

For the money if i just invested it into a single turbo kit ill end up making the same if not more power for less money. It did not look that way till i did the numbers so i might just have to putt around in this somewhat stock turd and collect parts instead of waisting my money on bolt on's cams intake etc etc.