N2O users please step inside

MYSTICSVT · Dec 28, 2006

I just upgraded my fuel pump this morning, and I'd like to step up the nitrous on my Mustang. What's everyone's opinion on the nitrous power limit for a stock 5.0 liter?

My current mods:

NOS 05115 dry nitrous system(with the adjustable tee)
Walbro 255 lph fuel pump
C&L 76mm MAF meter and inlet tube
Stock airbox with a flat panel K&N
Autolite 24's gapped at .035
MSD cap, rotor, and coil
Taylor wires
Flowmaster after-cat

BK_CAULEY · Dec 28, 2006

2 much nos

i ran a 125 shot on my stock bottom end when i had it a pretty good bit and it didnt do to much damage but me keeping my foot in the floor and finger on the button the stock bottom end gave up after about 6 months. but it was a stock 15 year old motor at the time.

FullAuto · Dec 28, 2006

That stock bottom end will take more than I'd trust that dry it to. I've put 250hp shot on multiple stock shortblocks, but I only use wet kits.

R/S 8027 · Dec 28, 2006

I have ran as high as an .082 jet and had little issues on a stock bottom end. I feel with your modifications that you can run in the mid to high 60's jets safely. I feel the dry kit is far safer then most wet kits. With running a dry kit all additional fuel has to be run through the injector, so I feel your limitation now are that you can not increase the fuel through your injectors. A chip, EPEC, PMS etc will allow you to be able to add fuel through the injectors upon adding nitrous. If you want to use higher then jets in the 60's. You will need some sort of fuel managment to add the additional fuel.

MYSTICSVT · Dec 28, 2006

R/S 8027 said:
I have ran as high as an .082 jet and had little issues on a stock bottom end. I feel with your modifications that you can run in the mid to high 60's jets safely. I feel the dry kit is far safer then most wet kits. With running a dry kit all additional fuel has to be run through the injector, so I feel your limitation now are that you can not increase the fuel through your injectors. A chip, EPEC, PMS etc will allow you to be able to add fuel through the injectors upon adding nitrous. If you want to use higher then jets in the 60's. You will need some sort of fuel managment to add the additional fuel.

So in my current configuration you're recommending I stay in the 125-150 HP range?

sweet88gt · Dec 28, 2006

I ran 125 wet shot for awhile and didnt do any more damage than expected. You will get all kinds of answers to this question. I can say the 125 shot was as high as I would go without a built shortblock. just my 2 cents

cobra2798 · Dec 29, 2006

Sorry for jacking your thread but I have a question for the original poster, you say you just upgraded your fuel pump, what dry shot were you running on the stock pump? Im gonna be installing my dry kit today and I still have a stock fuel system and I was gonna start with a 100 shot but now im thinking of taking it down to 75 until I can get a bigger fuel pump. What are your thoughts on the dry kit with the stock fuel pump, while it be ok with a 75 shot and is a 100 shot to much for it?

MYSTICSVT · Dec 29, 2006

cobra2798 said:
Sorry for jacking your thread but I have a question for the original poster, you say you just upgraded your fuel pump, what dry shot were you running on the stock pump? Im gonna be installing my dry kit today and I still have a stock fuel system and I was gonna start with a 100 shot but now im thinking of taking it down to 75 until I can get a bigger fuel pump. What are your thoughts on the dry kit with the stock fuel pump, while it be ok with a 75 shot and is a 100 shot to much for it?

My stock fuel pump wasn't able to keep up past a 75 shot. My advise would be to spend the extra $100 and get a 255 lph Walbro. It took me less time to replace the pump than it did to install the nitrous system.

cobra2798 · Dec 29, 2006

MYSTICSVT said:
My stock fuel pump wasn't able to keep up past a 75 shot. My advise would be to spend the extra $100 and get a 255 lph Walbro. It took me less time to replace the pump than it did to install the nitrous system.

But the stock pump was ok at 75? Im gonna get the 255walbro soon but today is like the only free time I have to get the kit on so I wanna get ti done and test it out.

MYSTICSVT · Dec 29, 2006

cobra2798 said:
But the stock pump was ok at 75?

cobra2798 · Dec 29, 2006

MYSTICSVT said:

Cool, thanks for the info.

R/S 8027 · Dec 29, 2006

MYSTICSVT said:
So in my current configuration you're recommending I stay in the 125-150 HP range?

Yes. I feel that you should be ok with that. As you start to upgrade to larger injectors, better fuel pressure regulator, etc. You can test with larger jets. As a long time nitrous racer I can recommend reading your plugs often.

cobra2798 · Dec 29, 2006

Got my kit in today. Went with a 75 shot due to the factory fuel pump and it runs like a beast, lots faster than it was. Im gonna order a 255 pump this weekend and up to 100-125 shot within the next month, but right now I love it

MYSTICSVT · Dec 29, 2006

cobra2798 said:
Got my kit in today. Went with a 75 shot due to the factory fuel pump and it runs like a beast, lots faster than it was. Im gonna order a 255 pump this weekend and up to 100-125 shot within the next month, but right now I love it

Think you like the 75 shot!?! Wait till you try the 125. I ran mine with the 125 HP jets for the first time today.

40 mph rolling burnouts FTW!

87Mustang351 · Dec 29, 2006

hey guys what kind of damage does the NOS do to the motors...and how much can you use it without alot of damage?

FullAuto · Dec 29, 2006

87Mustang351 said:
hey guys what kind of damage does the NOS do to the motors...and how much can you use it without alot of damage?

Guns don't kill people. People kill people.

Nitrous doesn't kill motors. Detonation and people kill motors.

Aliate X · Dec 29, 2006

FullAuto said:
That stock bottom end will take more than I'd trust that dry it to. I've put 250hp shot on multiple stock shortblocks, but I only use wet kits.

I agree, I run 125 on a h/c/i 302, I had 125 on my stock motor, but I wanted to step it up to 175. If you had a wet kit I wouldnt hesitate to run 250.

86bluecobra · Dec 30, 2006

i would say stay below the 150 hp shot. Also i ask why you would not run a wet kit. Much safer for the engine. Also i would recomend if you don't alreay to run a plate because a single jet does not disperse the Nitrous evenly into the cylinders.

Modular2v · Dec 30, 2006

i wouldnt go over 175.......and 175 is pushing it! Get rid of the dry kit, not nearly as effective or as safe as a wet/plate kit. Nitrous gets a really bad name, and it is honestly just because people get stupid with it

86bluecobra · Dec 30, 2006

I also forgot to mention that you will need to take a little more timing out of your car when you start running the bigger shot on nitrous to be ultra safe you take 2 degrees for every 50hp shot. That being said i have 4 degrees out for my 150hp shot but i know my engine runs on the rich side of things.

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