I contacted the "NOS" technical support team and they finally got back to me. They tell me 50 is perfectly "safe" and 75 is the max they would go.

Of course there is never any guarantee your not going to grenade something.

 

personally, ill keep my cars of the laughing gas, too much of a gamble for me

 

I assume they (and you) are talking "dry" setups?

 

I agree with Sgt.Stinkfist. With how vulnerable the rotary is to detonation, its not really worth the risk. but if you do use N2O, keep it at a safe level. I would say 50 max.

 

Meh, some of the quick non-turbo drag rotaries are running upwards of 300 shots.

 

^^ there are some guys who run at the strip near me. theyre running some big shots, not sure on the size though. its all about tuning. are you trying to say 50 or 75 is the highest you can go without tuning? id hope no one would do either without proper tuning. you can set it up to run pretty much whatever shot you want. itll just suck when off the juice.

 

A turbo rotary may be prone to detonation but a NA rotary isn't....peejay even posted big tips on mileage that mentions this interesting detail. With wet, I plan on a 25 shot for the '83 on the stock 180xxx 12A as the normal boost. Next Spring, when I get CBird back and have my backup car, ssixspeed and I will head to Kennedale with his race trailer and find out how much juice a 180xxx stock 12A will tolerate down the eighth mile track there...oughtta be a lot of fun......then I can finally take the RP Big Street Port 12A off the engine cradle and put it in its final home...

 

That would be my guess.

 

That is crazy talk on a carb'd engine...

 

pffftttt! 100 shot eaaaasy.. i've done as high as 150 these were NOS fogger setups running a holley 600 double pumper... i tune to high 11's in afr's and locked my timing around 14 degrees. it's ALWAYS in the tune.

it's no harder on the engine than boosting, which i've run upwards of 24psi in a bone stock 12a.

 

They were talking about a wet shot....

To many BS rumors and naysayers. N20 is safe esp in small HP levels. YOu just can't be amoron when tuning.

I wouldn't go dry w/ a shot at all.

I'd be interested to know what the stocker 12A can take! Do you run a WB02? I'd crank timing down to 10degrees throw in the c16 fuel and let the 150 shot go! It's be a blast if you had the clutch and drive train to hold the power.

Keep us updated!

 

Whenever this does go down, mar3, you better get a video of it. I want to see how much nitrous oxide you run to blow up the 12a.

 

Most Nitrous oxide is safe. Most rocket engines are used with Nitrous Oxide. Nitrous Oxide is not flammable at all.

Nitrous Oxide delivers more O2 than atmospheric air by breaking down at elevated temperatures, causing the engine to burn more fuel and air



The German Airforce in ww2 used Nitrous Oxide to boost their engines. That's how safe it is.


Now the person not hooking it up right, that's a different story.

 

Oh, the video-cam is def going to Kennedale with us...

 

I have a wet kit that Im planning on using as well Ive been saving for a plate system but recently I ve heard that its NOT a good idea that with the plate system and your normal racing beat intake(which I have) that since its fairly small that w/ the plate the nitrous forms a puddle since the bend of the intake is so tight compared to a piston intake w/ a plate system. This is believeable though the first time I hear it but I was under the assumption that the n20 and fuel ATOMIZE and form a fog right as they exit the bar on the plate?? Leaving little room for a " puddle" to be formed. If anyone can clarify please do so I have 1/2b.p. 1/2 s.p. engine that I plan on throwing a 50 to start and then a 100 shot for the street/strip. thanks in advance!!
-Erik

 

actually i did forget to mention, on the RB intake you want to grind down where all the four runners come together and make a pit to where there is a couple inches under the carb before they split. i'll try and find a picture. it will help tremendously with atomization for the spray.

 

You mean an open plenum?

 

That's what us old gearheads call it...