Well I have been throwing around the idea of spraying my 383. I have the compression and the motor was built for N2O. I got a bottle heater and window switch brand new for free (a childhood friend is cleaning out his shop and wanted it gone.)

What is a good starter kit for a carbed 383?

I'm not partial to brands but the bottle heater is NOS and switch is MSD. I'm looking to spray 75rwhp shot and work my way up to 150rwhp shot.

Thanks, Chas

 

the bang for the buck factor is hard to beat with the NOS Cheater Kit. (assuming you have a carb on it)

 

what intake manifold are you running?

spraying on a dual plane intake isnt advised normally...but 150 or lower, you'll be ok...



if i were you, peice a kit together.

Get nx solenoids with the bottom exits, a zex perimeter plate, and a decent bottle...the rest isnt as important. id recomend all of the safety items as welll...fuel pressure safety switch/bottle heater/window switch{even if you have an auto!!!}/purge...etc etc..all these will help the kit work without much room for disaster, also...get some good N20/fuel noid filters.


My nx kit hits like a ton of freakin bricks

 

Yes I'm running a carb, I was looking at the cheater kit but the only problem from what I saw was that it didn't have low enough shot of N2O. I was planning on starting with 75 shot.

I am running a weiand stealth high rise intake with a 1" riser. I definitely want all the safety stuff seeing how I spent 2k+ on the motor as it sits. Is the Comp's XE284 a good grind for N2O? I saw they sold nitrous cams but wasn't planning on sparying when i built the motor.

 

that'll be fine for the juice. nitrous cams are going to give up NA performance and pick up on LARGE shots of nitrous. if you never plan on going over 175 you can get a super powershot, or edelbrock makes great nitrous products

 

XE284 will work, it wont be optimized for N20 use, but..will work just fine.

weiand stealth is a dual plane, like i said, keep the shot around or lower then 150hp, otherwise you will have distribution issues, and risk a cyl or two going overly lean/rich.

its always advisable to start with the lowest jetting possible,in most cases...50 hp..this helps incase anything was overlooked, chances are if theres a backfire,damage will be minimal...and it wont hurt the motor..

its also wise if you are unsure how the chassis will react..i highly recomend a window switch, even if you have an automatic!! alot of people dont realize the potential here for disaster, hitting the rev limiter while spraying will result in alot of bad **** happening lol..window switch helps prevent this by shutting the N20 OFF before your RPM limiter preset in the case of a missed shift{manual}, but it will also save your motor, if your trans slips, or takes too long to shift{seen it happen many a time before}

the other is a fuel pressure safety switch, get an adjustable one, and a gauge to keep tabs on Fuel pressure..you can solve two potential problems here...

set the FPSS JUST below the fuel pressure you are running for the carb at first, this way, the first time you spray, it will alert you right away if your fuel systems ok, if FP drops too much{which it really shouldnt}, it will kill the system...

if your kit shuts off, you can SLIGHTLY lower the low setting on the switch, and try again...if this time it sprays the entire time...you are likely in the clear, but a higher flow fuel pump would be advised...

you can also use this method for spraying larger shots, to make sure you're not overtaxing the cars fuel system capabilities, or it can help diagnose weak parts like a failing fuel pump...

anything over 100, yank 2 or 3 degrees per extra 50hp via a timing box/or retard box...anything 100 and lower, i personally just keep stock timing, in fact...my car runs stock timing on 150 jetting..

be warned, N20 gets addictive haha! good luck with the kit, any other questions feel free to ask.

 

personally i'd get another fuel regulator and then the nitrous system gets its own, and set the fuel pressure flowing. a holley 803 regulator is cheap.....and works great for this application

 

i will always agree on a dedicated fuel system for N20 use...

but really, for his plans, its way overkill.

 

not a dedicated system, but using a log or Y to 2 separate regs, one for the carb, one for the nitrous. its the only way to tune the nitrous and motor the right way. but i do like to run my stuff a little closer to the edge than others are comfortable with

 

haha, LEAN IS MEAN!

i agree, right now my formula is set on KILL!

it is straight up ignorant for a true TPI car!



the setup you mention still leaves room for error, dependant on the fuel pump he is using..personally, id just run a small fuel cell, and call it a day.

 

most nitrous systems need like 5.5 lbs of pressure and most carbs like around 7, this is from my experience.

this is assuming a plate system of course, running the single nozzle on my TPI is a whole different deal, as will the 6.0 with 2 stages of dry

 

speaking with dave at nitrous outlet, and the guys over at nitrous express, they seemed to advocate 8-10 psi pressure..

they also highly suggested that i moved from the 45psi pressure jetting, and step into a fuel cell,with dedicated pump/regulator, and knock it down to 10psi, they were claiming id get a decent bit more power, and better egt's across the board because of the finer atomization at lower FP..


i can say though, ive had zero nitrous issues with my current setup, and i have sprayed a good bit through this motor....it takes it like a champ everytime.

 

hmmmmm i really need to get a little fuel cell, i already have a pump and regulators. the guys at nitro dave's are awesome to deal with

running 8-10 psi on a carb kit does give you a better margin for error as well from what i hear.

the biggest thing is timing, always pull a little more than you think you need to, then feed it back 1 degree at a time. timing will kill it quicker than running rich or lean

 

i have mine set on the safeside timing wise, but i have the car tuned/jetted on the leaner side of things...

i think it shows, ive gotten a 127mph from my car on nitrous...with a BS tpi vortec motor...

i am shooting for a 10.99 or better pass this coming weds!, its got the MPH..i gotta get the 60' down...i think my streetlites with skinnys,and mt et drags 28x10.5 should do the trick

 

good luck to you, i love a lean tune with just enough timing....or plenty, i've been running a Brand X kit jetted for 100 with no timing pulled on my stock 305. plugs looked good so i left it lol

 

i currently have 2 stages...

main kit is pilled for 150, second kit is currently pilled for 75..

on the 150, i dont pull any timing, and if i arm the second kit...it pulls 4..

i actually put a bottle through the car last night, and part of today, taking advantage of the lower temps, were in the mid 70s now, we were in the mid 90s a week ago...

the car pulls hard as HELL on both kits

my plugs look excellent..gimme a second, ill try to toss a pic up of them

 

Sweet guys thanks for all the good info looks like I have a little researching to do before I just jump right in, but its looking like this might be put on the back burner right now seeing how my fiancee and I are trying to close on a house. Any extra money will be going into a ut-oh fund in case something happens but it shouldn't take long for it to built up enough so I can buy some more goodies.