ok anyone that has nitrous help me understand something... if i get a nitrous system i need to get a tune for it. what i am wondering is lets say i am running a 75 shot, if i get a tune for it, how is my engine going to run when i am not using the bottle.. i really dont understand, is it something that i load the tune only when i am spraying and then have to put it back to stock when im not?


this is one of my major hold ups in buying a kit, i am not really sure about the tune part of it.. if someone could let me know that would be great

 

You dont have to switch it back to the n/a tune. But you would see more hp na with a na tune. But you can grab a hand held and you can have 3 different tunes(some maybe more now), and that would be the cheaper option. Then you can get a flip chip. Flip chip would be the most convient. and you could change it with a turn of the **** on your dash or console.

 

what would be the hp difference with a nitrous tune on na, compared to the na tune?

 

ok honestly i ran bottle on mine before i went turbo and they tuned my nos jets instead of getting a handheld device, any good dyno shop can tune your nitrous jets for you to have the best air ratio....i ran a 150 ashot on mine and it gave about 150 to the wheels and about 180 tq at a low rpm..check with a local dyno shop and ask them, i know were iam at it was like 100 bucks to tune the nitrous jets for my car and with like 5 runs to get the best numbers with it..

 

i have got a question...do you think a 100 dry shot would be safe for a 99 gt...i was told by the tuner that it wouldnt be able to handle it and it would blow and i cant have that happen...i would like to konw soon so i can get it tuned and ready to go...thank you

 

nitrous tune takes some timing off so you loose a few hp. nothing you would ever feel or notice driving around. its perfectly safe to run a nitrous tune without nitrous on but do not use a NA tune with nitrous unless you like skating on the edge.


black:
100 dry shot should be safe as long as you have the supporting mods. i wouldnt run a 100 dry shot personally, but i know theres several here that do. i'd get better injectors and a fuel pump though just to be safe.

ask him why he says your car cant handle a 100 shot. if he gives you some lame reason find another tuner. but in all seriousness, if you can't have your motor blow that bad then i wouldnt even use the spray. dont want you to be another of the "i blew my motor and i cant afford to fix it" guys. its a risk, if you choose to spray accept the fact that anytime you hit that switch you can blow your motor. is it likely when tuned and set up properly...no. but its a possibility.

 

The A/F isn't the problem. Companies make jet charts that are DEAD ON (most of the time [8D]). The reason for a tune, is decreased timing. That's usually it. So if you wanna cruise around on the N20 tune all day, planning to spray, then great. It's not gonna hurt anything. You may be losing 10rwhp N/A.

although when you go get a tune with decr timing, you usually get the A/F dialed in, so you are right.

 

that is a good idea...i have new injectors and the tuner said that if i wanted to run the 100 shot he could do it but wont promise it to last very long...im most likely going to run a 75 first then maybe step it up...i need to also find a svt focus pump and i cant seem to find them anywhere...any ideas where to look if so let me know....

thanks alot

steve

 

if you go with a wet kit you probably won't need a tune. NX I know is pretty good about not needing a tune but it couldn't hurt to put it on the dyno and check the a/f. I ran a 100 shot (NX) for 5 years untuned with no issues. A wet kit takes the fuel from the fuel rail so there is no need to richen up the tune (unless the a/f is off), as long as you don't have any timing advanced you should be fine. A dry kit usually adds the fuel through the injectors so you should get a tune for a dry kit. If you only have 1 tune and it is set to run rich for a dry shot the car will be a turn NA.

 

You could use a flip switch to go between tunes. I had a four bank chip so I could switch from the NA tune to the nitrous tune at the flip of a switch. Just dont forget to do that or you are asking for trouble.

As far as spraying, you are fine w/ 100 shot(for some other poster on the thread). You just want to tune it and use the safety goodies w/ it. You dont HAVE to but, from my experience, you want to. I am one of the the blown engines and no cash to fix it guys. It sucks royal *****. I would upgrade the clutch, fuel pump, and get a bottle heater as a minimum. Just my thought though.
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