Pistonfister

I have an 83 with stock 12a and carb setup. I want to drag race this season but I would like a little more power. I have looked into a few diffrent options and nitrous seems to be the most bang for the buck. I would like to hear back from anyone using a nitrous set up. What brand and what shot of nitrous and also if you would recomend using it. Thanks for any feedback.

Judge Ito

I have played with nitrous on rotaries for a while know, I would have to say, it's alot of fun. low maintance and some pretty impressive time slips in the 1/4 mile. I personally use NOS they have been around for many years. My system is a wet nitrous system, I use about 165hp on a 13B bridge port engine and have ran 9.41 @139 mph so far. if u want to see the car, i have a picture in the forum under rotary performance. If your going to use it on a stock 12A keep your hp levels down to a 60 to 70hp shot, it really is alot of fun. make sure your distributor timing is on the money. if u would like to go this way, ill keep posting here and trying to help ya...

yayarx7

Hello, I have a stock 12a with carb mods and a racing beat road race exhaust, would you recommend a wet or dry set up for this car? I will be installing a ported 12a as soon as I am done rebuilding it, what size shot would you say for this motor? I have access to a wide bas gas analyzer but would like a starting point.

Thanks

REVHED

I could be wrong but I was under the impression you can't use a dry system with a carb. How would you get the carb to supply extra fuel when the nitrous comes on?

Pele

iTrader: (28)

Talk to "Flamin NOS" He used ot have an 83 GSL with a 50 or 75 shot, I believe. Not sure if he set it up or the previous owner, but he could at least give you some info.

mar3

iTrader: (8)

Revhed is correct. To use a dry system, the NOS brain ups the "open" time of your injectors to dump more fuel so the engine doesn't lean out at WOT. A computer controlled carb might compensate a little but it won't compensate for a dry style shot of the juice. A dead engine is guaranteed. A 75 HP shot on a 90k mile or higher engine is likely also to be fatal in the short run if not within the first 16 or so runs down the quarter-mile. Stay conservative if it really is all stock wno rebuild.

puaka

iTrader: (5)

Hey Ito, I'm almost done with a street ported 4 port 13B and was planning on slapping on a wet kit. I was concerned about what would be "healthy" for the engine. I hope to get 100k miles out of it but damn that 9 second 1/4 mile sounds sweet. Is your motor carbed? Do you think that the 165 shot is overkill for a daily driven street application? What have you done for traction?

Thanks,
Mike

mar3

iTrader: (8)

Judge Ito is probably cranking out 450+ outta his engine to get into the nines with just a 165 HP shot. You'll note he has a bridgeport which is generally not street friendly unless you like idling at the traffic light at 1800 RPM. A street port w/no turbo might break into the tens if it doesn't blow the rear axle first.

Judge Ito

If your going with a carb. u need a wet system. NOS sells a wet system specifically for rotaries. I use a wet system with a carb. soon ill be using a haltech F9-8 with some alcohol injection 13B bridge port. looking for the 8 sec. E.T.'s. For Pauka you could use a decent 75 hp with your 13B street port engine. pauka the car that we run in the 9.4 is a full Drag car. no a street car. But I have a customer Running a 1988 Rx7 with a street ported 6 port engine and some NOS. rwhp 225 with a 70hp shot.

Flamin' NOS

Thanks for the reference Pele. I used to run a 150 wet shot to be exact . This was on a freshly rebuilt 12a with modified carb, street port, 4.9 gears, slicks, headers into an exhaust dump. I ran a 12.9 (street racing guesstimate) with HUGE tire spin into 3rd gear. I don't know what the trap speed was close to because the speedo was so far off.
I ran a holley blue (?) pump, retarded the timing by 14 degrees (?), colder plugs by a couple steps, race gas... I'm not sure about the exact numbers. This was done with a lot of help from my uncle back before i knew much about rotaries so the specs are off. I never blew the motor with the juice, i killed it by overheating it. I think the reason the car wasn't running to full potential was because i'd tuned it far too conservatively. I knew I was running way too rich. I was shooting flames that were about 5 feet long on that run. I usually ran a 75 shot and that felt safe and it was fun as all hell . Remember, just be conservative. Use all the v8 nitrous tuning tricks, but just be more careful.
Note- i'm sooooooo glad i went turbo
steve

Pele

iTrader: (28)

Hey! I can't remember everything. :p

perfect_circle

i know im bumping an ancient thread, but i think there is a lot to be learned from it. for example the comradery of Ito, or the fact that 150 shot was being run on a 12a reliably.