tuning for nitrous

[wadelieck]

Does anyone have any tips for tuning with nitrous. i am about to put a 75 shot and i just really dont want anythng to go wrong. i have also bought a nitrous controller just in case. im just looking for experienced nitrous users that have and tips.

[WS6FirebirdTA00]

Wet or dry shot? If it is wet, let it control the fuel to the high 11's and if it is dry command fueling to get there. Also pull out 3-4º of timing from what is optimal when N/A and see how that does.

[wadelieck]

its going to be a dry shot. And if you dont mind taking a look at my tune before i put the nitrous in and let me know if you see any thing off.

[WS6FirebirdTA00]

Yes, your injectors are maxed out and your timing table is very high. Put that in only if you want to get a new motor

[richard head]

If you set it to spray over the IAT sensor you can just set it up in the IAT table to remove 4 or 5 * whenever temp is less than say 32 or so. This frees up your timing for N/A. Also you want to probably go back to stock PE in order to get enough fuel for your N2O AFR of 11.0.

[WS6FirebirdTA00]

No, you want to command the correct fueling for nitrous, which is high 11's. Low 11's is way too rich and when you have the power to enter the CORRECT values, there is no need to set it to "stock". Figure out the fueling you want to run, command it and make sure the fueling are setup to match the target.

[Silver2002ta]

Yes, your injectors are maxed out and your timing table is very high. Put that in only if you want to get a new motor

Why does his injector duty cycle go from 101% to 50% at wot? Thats kinda scary. Might want to figure that out before you start spraying

[WS6FirebirdTA00]

No idea without a WB in the log, but something is not right (could be fuel pressure and that is NOT GOOD with a dry shot on the way).

[wadelieck]

im afraid of turning down timing do to knock and i think i just need bigger inj all together. and how could i test fuel pressure. And also i have an lm2 from innovate but i just can not get it to work right i have been trying for about two months now im just tired of messing with it. O and by the way that scan was at the track in about 40 degree weather.

[WS6FirebirdTA00]

Test fuel pressure with a fuel pressure gauge.

What? You lower timing to PREVENT knock. It is too high, it will knock on the spray with that.

You need bigger injectors if they are stock, no doubt.

What is wrong with the WB? They are quite simple to hook up. Ask questions so you can do it right. It is a lot better than buying a motor.

[wadelieck]

i lowered it one degree from stock and it stoped all the knock that i did have. and i just ordered 36lb injectors from holley. and the wb keeps telling me all diff numbers and at wot it says im 7.4 which is crazy.

[WS6FirebirdTA00]

That it did have on motor or with spray? I still think it is too high, but do as you wish

Have you calibrated the WB? Where is it located? It may be all over at WOT if the fueling curve is off.

[wadelieck]

no its on motor im deff going to lower it when i put it on spray.

its an exhaust clamp on the wb.

[wadelieck]

and the wb is all over at idle then when i go into wot it stays steady at 7.4

[WS6FirebirdTA00]

You need to put the WB in a bung in the air stream. The clamp on ones will be all over the place at low exhaust flow.

[wadelieck]

could i take one of the 02 out and put it in the place of one of them.

[wadelieck]

and why would it say 7.4 at wot.

[WS6FirebirdTA00]

Yes.

Because it is rich or your sensor is bad.

[wadelieck]

well me pe is at 1.2 so that would mean i would have to go well under 1 so i think it might be the sensor

[WS6FirebirdTA00]

No it doesn't. It can also mean your MAF/VE tables are off. Just because you command a 12.19:1 does not mean it will hit it.