I wanna squeeze 100 shot dry nitrous (zex)....any specs. or recommendation on injectors, and which brand can deliver fuel effciently?

 

i ran a zex dry kit with stock injectors(75shot) maybe an rc 310cc would work for you?

 

I wouldn't recommend running a 100 shot dry. The highest I would go dry is a 75 shot after that I would strongly suggest a wet kit. you could probally get all the stuff you would need from zex and putting one together w/o the full cost of a new kit. and maybe try to sell you dry box.

I had a zex kit and it struggled past 75 shot for some reason and did some research on it and nobody really recommends going over a 75 shot with a dry kit.

 

what compression? and management?

310-370 depending on the complete setup..

 

stock motor....no internals, running hondata s200, skunk2 im, aem cam gears, walbro 255, thats it! im trying to break into ll's possibly!

 

hey jde 07,

what do you mean by struggling after squeezin more than 75 shots....do you mean bogging, timing problems, fuel problems?????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tkHBseries &raquo;</TD></TR><TR><TD CLASS="quote">stock motor....no internals, running hondata s200, skunk2 im, aem cam gears, walbro 255, thats it! im trying to break into ll's possibly!</TD></TR></TABLE>

i think either size injector would work for you (go with the bigger one if u can) ...just tune that hondata to compensate for the fuel when the nitrous is activated..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jde_07 &raquo;</TD></TR><TR><TD CLASS="quote">
I had a zex kit and it struggled past 75 shot for some reason and did some research on it and nobody really recommends going over a 75 shot with a dry kit.</TD></TR></TABLE>

i think that is more for stock unmodded with no fuel upgrades..this guy is going with a bigger injector/pump and has management..i think he will be ok.

 

I personally would go with 370-440's, always leaves room for a little more if you upgrade stuff later. For around this size injector we normally just run RC.

 

Bruceleeroy.....are RC's pretty good??? and one other question is how about my FPR-im still running the stock GSR FPR, will that affect the bigger injectors once they are in?

 

yes RCs are good IMO and yes u can run the stock FPR with that size no prob.
i recomend getting one in the future..just incase u wanna get a little more CC out of the injector or maybe want to try to turn down the fuel pressure with that 255..but u should be ok since u have the hondata..and like kataku2k3 said go with the bigger injector for the extra "leg room".

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tkHBseries &raquo;</TD></TR><TR><TD CLASS="quote">I wanna squeeze 100 shot dry nitrous (zex)....any specs. or recommendation on injectors, and which brand can deliver fuel effciently? </TD></TR></TABLE>

Here ya go

Desired HP @ the flywheel x BSFC .50 / 4 cylinders = Injector size needed

This BSFC assumes you are NA. Most FI setups will be .05-.06 BSFC.

As for injector manufacturer I really like the seimen deka's. I beleive Camp 1320 sells the for about 290.00

 

I bet that things gonna run like a champ off the bottle with those injectors Instead of buying injectors buy another solenoid.

 

No it's okay, you just have to run nitrous everywhere...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kataku2K3 &raquo;</TD></TR><TR><TD CLASS="quote">No it's okay, you just have to run nitrous everywhere...</TD></TR></TABLE>

lol

 

hey uglyassscivic,

what is BSFC....?

is that an equation to figure out how many cc's i need or what? Let me know!

 

BSFC=brake specific fuel consumption...yes thats what that calc. does..ive used them and usually end up with an injector bigger than necessary..but i still use them for reference sometimes...to each his own

 

so bruceleeroy,

would i go 203hp x .05 x (.50) / 4= injectors

lets see i calculate it out to = 1.26???????

i have no clue on what this means!!! Im not sure im doing the equation correctly!

 

Cort meant for the BSFC on an FI motor to be 0.5-0.6 not 0.05-0.06. Just got a little zero crazy, lol j/k.

This is what I do when calculating this out. Say you're desired crank hp is 275. Take your desired power and multiply it by your BSFC which will probably be ~0.6-0.7 on a nitrous motor. Then divide that by (4 injectors multiplied by the highest duty cycle you want to see, 80% is about the max so we'll use 0.80 instead of 50%.)

So you get this... (275hp x 0.65BSFC = 178.8) / (4inj. x 0.80DC = 3.2)
That gives you 178.8 over 3.2 which equals 55.88 pounds an hour. To convert that back to cc/min just multiply it by 10.5. 586cc/min. Generally Honda motors run more efficient than that which is why 550cc injectors seem like overkill for 100 shot. The other option you have as Rusty Shackleferd mentioned is to just run a wet system, it's a whole lot easier to control fuel but not nearly as fine tuneable. Since you're working with dry Zex kit that's a little more work to convert.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kataku2K3 &raquo;</TD></TR><TR><TD CLASS="quote">Cort meant for the BSFC on an FI motor to be 0.5-0.6 not 0.05-0.06. Just got a little zero crazy, lol j/k.

This is what I do when calculating this out. Say you're desired crank hp is 275. Take your desired power and multiply it by your BSFC which will probably be ~0.6-0.7 on a nitrous motor. Then divide that by (4 injectors multiplied by the highest duty cycle you want to see, 80% is about the max so we'll use 0.80 instead of 50%.)

So you get this... (275hp x 0.65BSFC = 178.8) / (4inj. x 0.80DC = 3.2)
That gives you 178.8 over 3.2 which equals 55.88 pounds an hour. To convert that back to cc/min just multiply it by 10.5. 586cc/min. Generally Honda motors run more efficient than that which is why 550cc injectors seem like overkill for 100 shot. The other option you have as Rusty Shackleferd mentioned is to just run a wet system, it's a whole lot easier to control fuel but not nearly as fine tuneable. Since you're working with dry Zex kit that's a little more work to convert. </TD></TR></TABLE>

reason for my statement above.. ...^^^listen to this guy

 

allright guyz,

thanks for the info...i have a better understanding of the equation now.
props to all the fellas in here!

 

dsm 450's are cheap. Are you going to be using the hondata nitrous control?

 

i got the RC440's from lightening for $279.00, i think they gave me a pretty good deal on it....! Im gonna throw them in and tune with hondata in a week or two, and yes i am going to run it with the Hondata Nitrous controller. I was at a measley 203 hp to the wheel with 75 shots...lets see what 100 shots will up me to. Im really hopin to break into the 11's with this simple Nitrous setup!

 

right on, just take out the jet, your times will drop. j/k