should I upgrade my fuel injectors?

if so will I burn more gas driving normal because there are a higher cc?

also would I have to get a larger fuel pump?

 

I have no idea about maxima injectors or fuel pumps but if you
only have 1 pump, make sure it's a HIGH PRESSURE pump that can handle 100psi no problem and get injectors that match your hp goals.

For example:
I have the regular walbro 255 intake and it would hold 100psi (highest my guage would read) when I pinched off my return line idleing,
but while spraying, it would go to what I set it at (80psi) and would drop down to about 60psi!!! Found out why I was kind lean. lol
I put some cheap $70 msd inline pump and was rock solid at 80psi and picked up acouple ponies.

Get the biggest injectors you can, bigger the better.
What injectors do you have on there now? Do you have any bolt ons?
How much power does your engine make right now?
You won't use any more gas with bigger injectors if your ecu can handle them. So find out what the biggest you can go and get them

 

no you don't need to upgrade any of that stuff for a 75 shot. One thing though wetter is better. Get a wet kit instead.

 

75 is the max for a dry shot,, anything more and your gonna freeze up your injectors

 

so a 65-75 shot of dry zex is "safe" and i dont need to upgrade anything

what if i do upgrade to bigger injectors and a larger fuel pump

 

i ran a 75 shot dry kit for a few yrs stock no problems, no upgraded pump or injectors. if you upgrade your pump and add a fpr and convert to wet you can leave the stock injectors and run a 100 shot. that still doesnt mean its safe but you stand a better chance.

 

oh ok thanks for all the help

but my main question is

im pretty sure im going to be running a zex dry 75 shot because I can find that kit cheaper than wet zex

If I do run the zex 75 shot dry and i upgrade my injectors to 5th gen or 300zx injector and I buy a 255 fuel pump what will that do for me.?

will i burn more gas with everyday normal driving due to the larger injectors and larger fuel pump?

 

that will cost you much more than a wet kit. then you have to find a way to tune the injectors. i owned a dry kit then converted to wet with stock injectors.

 

"Tune the injectors"?
Like I said, I'm sure this board will have the answere to what's the biggest
injector you can run with the stock ecu.

The ecu will cut back on pulse so you don't use anymore fuel then stock unless you were running lean with stock injectors.
What size injectors do you have? They are not bosch style are they?

I just got some 19lb/hr mustange injectors for 45 bucks shiped.
Stock one's were 14.5lb/hr, replaced them with 17.5lb/hr from a 95 m3 and
now I have the mustange one's. The biggest I can run is 24lb/hr injectors before the ecu can't handle them but for a 50shot, the mustange injectors are fine. I switched to them because I was running alittle lean.

The actual problem was that the walbro 255 couln't sustain the 80psi while spraying a 50 shot. So get the high pressure one made for this **** or run another inline fuel pump with your stock intank.
This information is universal.

How much power does your motor make?
How much power do you want to make?

Answere these and I'll give you a suggestion on what size injector you want.
Just trying to help.
Dry to wet kits usually cost about $150, just think about that.
...and think about your intake exploding and your engine bay on fire. :P
Dry for the win!!! Not a very commen occurence if you carefull, but it does happen.

check out one of the many videos on the web.
http://media.putfile.com/crx_burnt


For me: If I would do it again the right way.
used 19lb injectors 50 bucks
Inline msd high pressure pump with my stock intank 70 bucks

= $120. Alittle cheaper then a single fogger and safer. Works for me.


I mean if you get some brand new like 30lb injectors it'll cost you a grip.

 

was that engine bay fire from a Dry or Wet kit?

 

anyone here run a dry 75 shot with an SAFC? I know it's not recommended to run the 'lol' gas with electronics that retard or advance timing...but an SAFC doesn't actually do that...anyone got advice on that?

 

you really dont need it for a dry shot because the fuel pressure is controlled by the nitrous vacuum, now for wet its a diffrent story. and retarding timing is good for a high shot at least 2 degrees for every 50hp.

 

Lemme ask the question another way...

If I already have an SAFC in the car, and am interested in adding a 50-75 dry shot to the car. The SAFC isn't going to cause issues is it? Anyone else here run an SAFC to fill the holes...then spray on top? I'm not interested in spraying all the time...so I'm not going to tune the car specifically for the 'lol' gas because I'll rarely use it.

If I'm correct....tuning with the SAFC is fine. Spraying on top of a SAFC should be okay with a dry kit because the car will auto adjust the metering...is that correct?

 

its fine, i said you dont need it for a dry kit but if you have one thats great. it wont cause any issues and would help you tune better for n/a