How much spray can the stock 13b handle safely. And what mods will be needed to use a 250 shot. What size carb should be used for a bridged engine with a 250 shot.

If you need to ask, you shouldn't be doing it.



Start with a low shot, work your way up. Im assuming that is, you have the right instrumentation to monitor your engines vitals?

The first this that comes to mind when hear Nitrous and a rotary is..

Nitrous in, Apex seals out!!!

But I have always been to chicken to run nitrous.



If you want to run a lot of N2O, (IMO)Tuning is the biggest step. I would get a a stand alone system that way you can make your sure you wont lean out, And you can retard your timing... Or at the vary least start out with a piggy back fuel computer..



Edit: Oh yeah I agree with RONIN FC dont forget all the important gauges!!!

Nitrous and rotary engines dont really go together all that well because of overlap. Thats why they make special cam shafts for nitrous setups in piston engines. That said, some people do run nitrous with success so it is possible in a rotary.



Based on your question I think you should steer away from nitrous, otherwise your next question here will be something like "Who is a good engine builder in/near New York"

You're kidding, right?



I have no clue as far as nitrous on rotaries is concerned... but people run more nitrous as a total percentage of power output through rotaries than any piston engines I'm aware of. Especially piston engines with stock internals!



There are more than a few rotaries getting more than half of their total power output via nitrous. See anybody doing that with a piston engine?



That said my nitrous experience IS entirely with piston engines... and beyond tuning the biggest thing is getting the exhaust to flow. THAT is the main difference with a "nitrous cam". There is so much more exhaust volume vs. intake volume that it needs to be dealt with specially.

scathcart on the other forum was running a 280 shot(no typo) on his 89 TII on the stock turbo. I dont remember if the engine was even ported. In addition, the extra exhaust from the nitrous made the boost creep to 15-16 psi, and it still didnt blow up.



Wasnt Judge Ito running upwards of 300 on his partial PP RX3?

The boost creeps and the nitrous takes care of extra air, fuel and cooling needed to run that kindof boost...doesnt it? The only reason I dont use it is because its not a constant power adder like a turbo or a supercharger.

Oh yes the nitrous helps with cooling! It's very very far below zero when it flashes from ~900psi to atmospheric.



I have a theory for nitrous tuning on turbos, but I haven't tried it because I own no turbo cars anymore. And I really do not follow up too much on nitrous builds because if boost is like crack then nitrous is crack's evil twin! But okay so most people inject the nitrous on the pressure side to get the charge cooling benefits. What if you injected it before the turbo, so it makes the air denser before it even gets toi the compressor? That'd be like having a much larger turbo, for "free".

Elliot has been doing that with water/meth injection for a while

Yes you're right. And if you plumb the nitrous correctly you will have full boost in an INSTANT.