tuning and custom chip.

[Daniel50]

Well i want to get a custom chip and some baseline runs done before my h/ci and i want a nitrous tune. the chip carriers two tunes and is 300 dollars all said and done. Believe its a predator. Chip re-tunable. one for all motor and one for nitrous. tuning is 125 an hour.

1. Should i intall my afpr or can than adjust my fuel pressure with the chip?

2. Do those prices sound right?

3. About how much power can you expect to gain from custom tuning with my mods?

4. How long is average?

5. And, with my setup would 24lb injectors hurt me? i want them for nitrous but want to know if they hurt me for daily driving and all motor runs?

 

[Daggar]

1. No... do your tuning through pulse width, not fuel pressure.

2. The prices sound fine. I've seen it run a lot more.

3. It depends on how much power is waiting in your combination needing to be unleashed. (that's like asking how much power an exhaust pipe will give you. Answer: None... it frees up what's already there) If your current tune is poor then it will be a significant increase. If your current tune is good then you won't see as much of an effect.

4. Half an hour to strap it all up correctly. A few minutes for each pull. Then depending on how much tweaking across your power band requires will determine how much time will be spent doing it.

 

[Daniel50]

oh no! i asked the question i hate most didnt I? how much power will this CAI give me?! lol. well no tune at all right now so ill find out when its done.

-so is the afpr worth putting on before tuning?

 

[Daggar]

I (personally) would not bother with it. The stock AFPR is designed to provide the correct pressure for optimum spray pattern. You change the pressure, you change the spray pattern. It's much more efficient to adjust the air/fuel ratio by changing the amount of time the injector spends open, closed, and how far ahead of or behind the valve timing events it begins to fire or shutoff.

 

[Daniel50]

ok my tuner says he can dial the car in, in about an hour and a half.

 

[gcwh02]

your car will run rich n/a with those 24's, u need some decent heads and cam before u need 24's

 

[vikingpower]

your car will run rich n/a with those 24's, u need some decent heads and cam before u need 24's

I'll second that, I got a (lightly) ported Typhoon and TW heads and I still got the stock 19#'s in mine. Injectors will come when I put in a bigger cam (still stock) and a chip or dyno tune

 

[Daniel50]

i run a 100 shot though and when i run it without the 24's ill be lean and my car falls on its face in third cuz im not getting enough fuel

 

[Daniel50]

another tuner recomended 30's?! maybe cuz they are going to tune it anyways?

 

[Daniel50]

anyone know?

 

[IntenseBlue]

24s. He should be able to tune the a/f around the injectors.

 

[IntenseBlue]

You can probably get away with 19s.