Nitrous

[2000Si]

no not NAWWWWZ.

I've slightly considered getting a shot of nitrous for the otherwise stock engine. I doubt I'd ever get one, but for the sake of discussion, how would you go about tuning that? Make a run on the dyno without and then with to fine tune the A/F ratio?

How would you go about updating your fuel management for it? Just grab a new filter and upgrade to a 255l/ph pump? Or would you need higher flow injectors too? I ask cause injectors might inhibit NA performance on an otherwise stock engine wouldn't it?

[dubcac]

All you need to do for a 75 shot and under is retard the ignition timing and use a colder than stock copper plug.

[2000Si]

So then what would you need to do for having more than that? I was talkin to someone who had an Si with an 80 shot and some corresponding bolt ons who apparently hasn't blown his engine yet.

[dubcac]

80 shot, same thing. For a 100 shot, you'd need to go direct port, get a walbro 255 pump, and a little better tuning just to make sure everything is gravy. I'd look into an aftermarket ignition ala MSD Digital 6 that will let you have stock or advanced timing during normal driving, and retard the timing once you activate the nitrous. Going significantly higher than a 75 shot is going to cost significantly more money, because you'll need more stuff...and putting more power in runs more risk of blowing the motor.

[oompahlumpa]

even with a 75shot, id want to get proper tuning. and keep an eye on my fuel managment. best to be safe than sorry.