can injectors be too big? stock gsr 10psi looking for around 300whp. tuned with hondata. i'm looking at a set of 1000cc injectors. thanks dee

 

Yes it will work but they are double what you need for 300whp. I would have 440's. You want an injector to be around 80% duty cycle to get the best spray pattern out of your injector. My 1600's are only at 40% right now but when i had 1,000's they were at 88%. As a rule of thumb you dont want to exceed 90% on the duty cycle. Otherwise your fuel sprays like crap. Like you putting your finger over a garden hose. Alot of people run more then 90% but that is asking for trouble. To get the best performance out of your set up match the injector to your fuel needs. 550's will be ideal. They are good to the 400whp range.

 

ron is correct you can get 1000s and cut them back in the hondata but the proper spray pattern wont be achieved, but hondata can idle them, you will be able to run the car just fine i have 1000cc in my b16 and it works just fine, i know you dont want to go buy 10 different injectors when you upgrade but if i were you i would just buy the 880s or 720s

 

440s are too small for 300 whp.
550s are too small are too small for 400 whp.

I am running 550s at around 300 whp at 80% duty cycle.

Injectors are never "too big" its really all about the tuning. You could use 1600cc injectors if you wanted too.

I have used rc 750s on my setup. They were fine except for idling w/out an EMS that had a/c load compensation was not fun because of the injector pulse at idle etc.

 

If an injector stays open longer than its operating efficiency range, the injector overheats, and the spray pattern can distort. When the injector overheats the gas going into the combustion chamber becomes much hotter. Not good considering your fuel is your thermal management. Also, on a note about too large of an injector, yes I believe you don't want to go way over kill. The optimum range for an injector to operate at under max efficiency is the 80% range depending on the injector. Once you start going too large, the atomization of the fuel becomes much harder to completely generate and therefore you have to run the injector at a greater rate...I.E..runs richer to idle smoothly, etc. Also, when you start talking about larger injectors, you start to move away from the traditional pintle style injector and start heading towards ball/seat, disc, etc. Not to mention most high cc injectors require a resistor box. Just some more to think about.

In regards to Mtber, 550cc injectors and 300whp with 80% duty cycle....what is your base fp? IF you had an adjustable fpr, you could increase the fp and get those injectors to handle 350whp + safely.

 

My 440's were at 85% duty cycle with 325whp. This goes back to tuning and other variables. I maxed out my 1,000's with about 550whp. I have been told people get over 600whp on them but that was not the case with my car. Considering i have a huge aeromotive fuel pump with all new larger hard lines running to a fuel cell i dont think it was a lack of fuel volume or pressure. I told him to get 550's for his set up of 300whp.

 

can we tell who the engineer is in this forum???????? damn J' that definetley lays it out

 

jason is one smart honda cookie

 

440s should be able to make 300HP without too much problem...I would step up one size just to be on the safe side though..