I was curious if anyone here is running nitrous oxide and if so how much, wet or dry and the best place for nozzle placement. I had NOS on my Integra (80shot wet) and have installed both wet and dry kits on mustangs, civics, integras and even an escort,:keke: but I want to know how it does on a Subaru.
I'm considering just going for it and seeing how it goes if no replies. My main dilemma is to spray before or after the intercooler. I'm running an STI top mount.
^^ Seems to me like it'd waste lots of the spray if you did it before the intercooler. Either way, I'd make sure you watch it like a hawk.
don't be scared of the spray... the spray is your friend. My concern with the after intercooler spray while using the top mount is the nozzle would be sooo close to the t-body, which in itself isn't a problem but the intake manifold design looks like it may need the spray more distance to disperse and "fog". It's just so close to the runner splits! On the integra it was about 3" away from the t-body and worked excellent . I ran near a bottle a week on that sucker for a full summer. That being said the two manifolds are NOTHING alike. And remember 900psi is target bottle pressure.
You're target bottle pressure should be higher think 11 1200. There is nothing wrong with spraying a Subaru, just keep in mind that they are very afr sensitive motors so start out jetting it rich, log the runs and adjust accordingly. You should be able to tap the intercooler just before the throttle body that will give you good distribution. We will be spraying my brothers car and I suspect we are going to end up jetting it in two stages 150hp and then an extra 50 hp, so 200hp total, it is a fully built motor, on a stock Subaru motor I wouldn't be afraid to spray a 100shot but I'm a little more ballsy than most people. Matt
I have been curious about spray in the lower rpm's...like prior to spool on big turbos. Have you guys played with that Matt?
Seems a progressive controller would be best eh? Maybe do a bigger hit around 3000 and taper it down after that as boost sets in.
Yeah there are a lot of good progresive controllers on the market now. NX has a really nice pc programable one.
The problem is that it seems the amount you would have to spend to get a good reliable No2 controler and set up, you could have done something else that would be more reliable and equally as benificial. I mean think about what could be done with the $2k that it would cost for a good progressive controler, bottle, bottle heater, purge valve, jets, tubing, etc. But I have heard of some crazy things being done with No2. I would also like to give the co2 IC sprayer a try, but just can't bring myself to spend $400 for one.
Dunno man nitrous is pretty cost effective and it gives you the option to ramp up to bigger nozzles for as much as your powertrain can handle. I never would have considered running nitrous but after seeing some cars running on the streets with it I've considered a 75 shot.
if i remember correctly, youradumb1 had a dry kit on his that he sprayed before the stock WRX TMIC... he was pretty happy with his and he said that after spraying, the intercooler was ice cold
Yeah only problem with a dry kit is that you are asking the injectors to do the fuel portion of the work. The good part is that you don't have to run additional lines. The bad part is that if you are close to maxing your injectors, your are gonna have problems. I am currently running 102% injector duty cycles now with my td-04 at 18.54 psi. I'd hate to see what they would run with a dry kit on top of that! As for being cost effective, yeah they can be until you start getting serious about it. A cheap kit can work, but it is not going to be as safe or effective as a well contoled kit like I am sure Matt is running for $2500. I have seen just progressive controlers run $1500. That does not include anything else, just the controller.
Dry kits do increase fuel pressure by pushing the fuel psi reg. diaphragm but I prefer wet kits for tuning purposes.