I was wondering if it's possible to put a nitrous kit in my z with Crossfire Injection. I would only be looking a 25 or 50 shot. just that extra little kick.

 

I'm pretty sure nobody makes a kit and very few people have done it. I'd say that a direct port (fogger) system would be the way to go ...but then you'll be spending all kinds of cash for a very little gain.

Easiest way would probably be to convert to a carb and then use a plate. Probably cost much less too.

 

remember, the CFI intake ports on the intake itself are half casted over. Opening those up alone could give you a nitrous like increase, but thats for another part of the boards.

 

I have the intake manifold ported already. Thinking about getting the x-ram. I was just wondering what sort of system I would have to get for my CFI.

 

what kind of "x-ram" are ou talking about?

 

There used to be an NOS kit that mounted 2 fogger nozzles in the air cleaner base aimed down the throttle bores.

There's a number of other ways to do it. If you wanted to run a fogger you'd have to either run the nozzles from under the manifold or mount them in the manifold lid aimed at the runner inlets. I've also made 7/8" thick TB spacers and drilled each one for an NX nozzle. You can do the same thing with spray bars. I know that someone played with using the EGR passage to distribute the N2O/Fuel (I have no idea how well it works), but if you're like most you cut that out when you ported the intake.

Why exactly are you limiting yourself to 25 or so hp?

The stock intake is OK as long as you remember that it's very torque/low end biased. Much more so then something like a TPI or the typical carb setup. The X-ram is an OK setup but I've always wondered how it gets decent fuel distribution with that flat plate that everything runs smack into. I haven't looked for a couple of years, but I think it's way overpriced for what you end up with. You also loose the positives of the crossfire setup and just end up with a twin TBI setup, if you're going to do that you might as well just convert a tunnel ram or something. Personally, I'd say get a crossram (edelbrock, offy…) and cut a top plate for it to mount the crossfire setup to. That way you maintain the crossfire layout and design plusses and gain runners that could feed over 500hp. The TB's can be bored to about 54mm if you're a little lucky and the problem ends up being finding large enough injectors. You can overcome that somewhat with big block truck injectors and an adjustable fuel pressure regulator (the injectors are happy into at least the mid/high 20psi range, over 2x stock).

 

Yeah, someone told me about the Nos kit. I found it on their web site, but all it says is that its made for the CFI. No details of where its mounted or anything.

I dont want to blow up my engine, so I thought it would be better to use a smaller shot. I also dont know if my auto. tranny and rear end could handle a large shot. Just looking for that extra little kick, and think it would be cool to spank some tpi's.

 

Like I said, that setup mounts the nozzles on the air cleaner base facing down the bores. I don't remember for sure if it's crossfire specific or setup with any TBI (CFI is GM's acronym for crossfire fuel injection, where it's ford's acronym for TBI, stands for central fuel injection. I have no idea what NOS was thinking). It works fairly well, I just don't like the idea of having to disconnect stuff to pull my air cleaner off and get to the linkages/plumbing underneath (which is why I mentioned making spacers for under the TB's, which incidentally, anything that raises the injector towers upward helps fuel distribution, airflow, low end response and top end HP, there is not negative until you can't close the hood )

WRT to kicking TPI ****… I had my na crossfire 305 car running 13.8's with a stock long block, stock manifold base (tweaked just about everything that bolts to the lid though), headers, custom exhaust… It actually ran faster with 3.23's and 27" tall tires then with 3.42's (the killer low end gets pretty good at breaking rear gears so I got a chance to experiment there, but I never had a problem with the supposedly weak '83 700r4, even after 160K miles of racing it weekly)…

 

Getting enough fuel to the dance would be the problem I see.

Might investigate the Viper guys answer, ie shoot NOS with Propane. Almost perfect distribution, and little to no lag like adding gas has.

 

the NOS setup is a wet setup, taking care of that.

Otherwise taking something like a 'vette or viper propane/N2O kit, buying a second nossle and plubing and running that would be pretty sweet, but not really worth messing with for less then 100hp or so.

The thing with propane is that I don't believe that any of the 'bottles' that they're using are technically track legal.