help! i need a good jet calculator

[tc_by_trd]

alright guys im gettin tired of my 75wetshot i dont feel it pull like i did b4 so im going up too 100:devil: well i have this calculator which i used for my 75shot http://www.dynotunenitrous.com/store/scripts/installation_instructions/jet_calculator/nitrousjetcalc.asp (jet calculator click here) but now im askin for the experts help i want to know if you guys can tell me which jets i need for my nitrous and my fuel for a 100 shot on a NOS wetsystem single fogger. and its a 4cl car so my fuel pressure at WOT should be somewhere in the 40's like any other new economy car but correct me if im wrong which i proly am lol



thanks alot

[flames4me]

do you have a FPSS? if so what is that set at? if you dont, you might want to get one and set the fuel jet just above that pressure so if it drops at all the nitrous will disenguage before any dammage is done to your car. and with that size shot on a 4-cyl you might want to invest in an actual fuel pressure guage ($10-$20) to find out exact PSI for us. do you have any other safety features on your nitrous system?

[tc_by_trd]

oh no i dont have a fpss or anything else i jus have the system i bought and no gauge but im workin on gettin a wideband but they are so expensive

[flames4me]

right now you are on the verge of having to upgrade your nitrous system to make your hits safer, among things you might want to price out is 1st of all a Fuel Pressure Safety Switch! and others to think about would be a window switch, progressive controller (to help put less stress on drivetrain with your initial hits), WOT switch if not already installed, Air/fuel ratio guage (for fine tuning jets)

I am advising to start putting safety devices in your car because 75hp shot still has some give in it if something might go wrong, but with 100 shot on an otherwise stock 4-cyl is pushing the limits of your engines hp capebilities. if set up correct, you can do 100 once a week if you want, or if those precautionairy safety features arn't installed right away you could be buying a new engine after the first hit... especially if you dont know everything that is going on with your car already (fuel pressure for example). sorry for the lecture, but I know this is your daily driver and I know how it feels to blow stuff up (so far 2 engines and 3 trannys)... and mine was with my project cars that I didnt have to rely on every day. just something to think about before you slap in bigger jets. With nitrous it is extrememly easy to get greedy, and if you dont take the saftey measures in advance you will be spending some big $$$ for repairs.

[tc_by_trd]

oh **** man, thanks alot dude you jus brought me down to earth lol i jus relized i am playin with fire and i might get burned. i think i will stick with the 75 until i get all the safety things you advised.

[flames4me]

no problem, I'm not trying to discourage you from nitrous in any way, but just because its your daily driver and nitrous is sooo easy to get carried away with, I just dont want to see you post back in a month saying that you blew up your motor because of nitrous.

you were saying that the 75 shot doesnt seem as powerful as you thought it would, maybe the first thing you can get for it (besides a fpss) would be an air/fuel guage, you might be running rich right now and be loosing power. that would be a quick easy way to fine tune and possible pick up the extra 25hp you were looking for... if you dont know your fuel pressure and over-jetted the fuel pill, yo can be down to 50 actual hp shot even with a 75 shot nitrous pill. something to think about. good luck

i just noticed you have hp numbers in your sig, are those actual dyno, or just estimates comparing from stock numbers?

[tc_by_trd]

those are actual dyno the stock is 140whp 148wtq and those number are with nitrous, yeah i will buy a a/f guage and all the safe stuff to go along with it, thanks alot man