ErnieT

iTrader: (2)

Sup guys?! Take a look at my mods. I've got every bolt on imaginable including fuel upgrades. I was thinking a 50shot could very well put me in the low 11's, maybe high 10s. But I wouldn't want to risk anything and it would only be used on the drag strip with race gas. Otherwise when I drove on the street it wouldn't be hooked up.
My reasoning is, it seemed alot cheaper to spend $500 for the NOS rather than $3400 for a T-78Kit, but not if you all think I'll blow my motor. Especially since I just got a new ported motor installed about 2months ago.
Thanks,
Ernie

Brad

Well, lets put it this way. Compare the number of people with a T78 with those with NOS. In fact, I dont think I've ever seen an FD with NOS. Well, except for in that one movie about NOS, but every car had NOS in the movie promoting NOS in all its glory. Is that why you want NOS?? Yeah thats what I thought.

Anyway, I'm not an expert, but I would imagine it prob would not be good for your motor.

jar

go for it, but make sure its a wet system! fd's can take up to 100 shot of nos as long as it wet system and your engine is in good condition. even a dry system should be able to handle a 40 shot of nos. for $3400, you could get a new engine already!

hawaii rx-7

hey, you got a really bad *** setup as is, don't ruin it with nitrous. why risk blowing your engine for a couple of seconds. you're not running in the pro class and are not getting paid to race are you? If not, i say don't. unless you are experienced with n2o and can calculate the exact fuel demands, then don't squirt it in. just think what would happen if in a panic, you happen to press it at a low rpm. crack goes your newly rebuilt engine.

however if your set on using n2o, then do it right. go with a progressive kit or an automatic kit which will come on at a preset rpm, with proper fuel enrichment. Ask people in your area who have experience with installing and tuning nitrous kits. don't try to trouble shoot it by yourself on your crappy 50 autometer af ratio gauge. you're not super man, and kryptonite can kill.

and regarding jar's comment that you could easily inject 40 dry, i'd seriously reconsider. with the mods you're currently running, it might just be overkill. you got the injectors for it, but most likly it won't be tuned for it. get on a dyno with a wideband first. then go experiment with someone qualified to tune n2o.

atihun

Excellent setup, however, if you tune your car, especially the PFC to regual driving, ie. without NOS, how will you compensate the map to run with NOS. If you tune the PFC with NOS, then I think that the car will run like crap without it. NOS seems too much of a variable for our cars.

Save the money for the larger turbo. I am dreaming of installing two Apexi RX6 turbos, with a strong and ported rebuild, someday. My wife owes me an engine and turbo. I just have to find the exhaust manifold that will hold two of them.

SPOautos

you have the set up to run low 11's as is....I say its not worth it, if you want more power either turn up the boos or get a bigger turbo kit.

What boost are you running

ErnieT

iTrader: (2)

Thanks guys. I think I'll stay away from the NOS and save for the single turbo. And no I wasn't doing it to be like the dumb *** movie. But thanks for your input. As of right now I can only run 15lbs of boost with the Power FC. It seems my stock map sensor (according to KDR) won't register anything more than that. I've programmed the Power FC for 17lbs, but it still only goes to 15. I think I need the boost control kit. SR Motorsports sells it for $125, I think.
Ernie

atihun

I thought the stock MAP Sensor is good for 1.2 bar, (17.6 psi).

What you may need to do is put in smaller pills into your pre-control and wastegate lines to get any higher than 15 psi on the stock stuff. I personally wouldn't run the stocks more than 15, maybe 16 with race gas. It gets too hot and the efficiency gets very low.

94touring

Nice setup, but save for the single turbo its more fun too. Buy the 3 bar map sensor from msd to get your boost up, it's like $100. I wouldn't run over 15psi on stockers anyway.

cewrx7r1

iTrader: (2)

Rick has been running a 50HP dry nitrous system for two years
without problems. First with a XS ecu, and now with the PFC. Dry nitrous is safer than wet! His system has fuel compensation by connecting into the FPR and increasing fuel pressure by about 10PSI. When Ray programmed his PFC, he added a little more ignition retard. His maps can be seen as Houston set #2. He does not use it when Houston has cool weather as the gain in not as dramatic as when it is hot here.



http://houston-rx7.net/ricksheveland/engine2.html

Node

iTrader: (1)

wow, his engine looks really nice :-D
Nice car overall. I love the AC/Heating control reposition mod.

ThirdGenRX7

NOS = gay and retarded

shame on you for thinking such a thing

ZoomZoom

iTrader: (2)

I think its safe. You will need to compensate for the juice with different timign advance and fuel. Also get the ZEX Kit or similar so the solinoid will only pump N20 when the fuel is at 80% or higher. Its all in the Kit. Rob Robinette used N20 on his rex with no ill effects. Also Ari runs 9's with a single turbo and alot of N20. Last I heard he ran a 250HP shot of N20. Its not the nitrous thats bad for the motor. Its not having the tuning right for the nitrous thats bad for the motor. Also It is used alot to help spool up the turbo faster off the line. Many people use Nitrous. Not just in the movies. LOL. The thing with rotories is they cant take detonation like Piston motors can. Thats why anyone can run some N20 in a piston motor and get away with it. Even with poor tuning. Proper tuning is the Key. Its not anything less or anything more. Its not even about the juice. Its just tricky if you dont have experience tuning for N20. Call Rotary Performance in Garland Texas. They run it and can probably give you the low down on how to safely set up a Shot for your car. Good luck.

Wade

iTrader: (1)

I've thought about using nitrous, I think a stock engined/turbo car should be able to get into the 10's with the help of a small shot. How many people have ported motors and big turbos, big $$$ invested and still run mid 11's or even 12's?

Plus, I can't justify huge amounts of money just to go fast in the 1/4 once in awhile when a $500 nitrous kit can do the same thing. And a big turbo isn't that valuable on the street, my setup now is so fast I can only get into the gas for a few seconds before having to lift, the big turbo would just take longer to get it rolling.

I agree with most that tuning is the key, most people like to spend thousands on their cars and never tune them properly.

Wade

sunnyxwala

its safe...but not more than a 50 shot