injector size

[SlushboxTeggy]

im building a new motor and eventually i want to boost it. 10psi daily and something like 20psi at the strip. what size injectors should i get? i was thinking 450cc but i dont know. im dropping it in over the winter but it wont be boosted until at least the summer. can i go with the bigger injectors now? and they will be ran with str intake mani, str tb, str fuel rail and some aftermarket fuel regulator(havent decided yet). thanks for the help.

 

[phunky.buddha]

You'll probably want something larger than 450cc injectors for "20psi" on a turbo...

Injectors are really easy to change. Just use the stock ones until you're ready to install and tune the turbo, otherwise you'll have a harder time tuning the engine off boost. Run a Hondata ECU to tune your big injectors. Your engine won't run that well on that much boost without a real tuning solution.

 

[brian11to1]

Im curious can you use Mazda RX7 Injectors (like 88's?) I was told they were 550cc's... Just curious.

 

[SlushboxTeggy]

i dont no about mazda injectors, but i do now that dsm injectors will work. i think im gonna get some 450cc blue tops. just read and article in import tuner-b-series shootout and 2 out of the four teams are using 440cc all motor so it might be overkill but even a good set of dsm injectors are cheap as hell. ill get some big rc injectors when i put the turbo on sometime during the summer.

 

[posol]

rx7's are side mount and will not work. you need a top mount style.

either way, there's not readily availble injectors for a honda that will support the power you're going to be after.

first of all, 20psi in and of itself means nothing.
thats like saying i'm going to run 20mm/Hg at idle.

assuming you're going to go the "standard" t3/t04e .57/.63 60 trim, 20 psi is going to put your ls vtec in the low 300s i'd hazzard a guess.

450s will top out long before that.
550s will be close.
RC has recently released 650 and 750cc staturated injectors. i'd recommend one of those. importparts.com has 'em

 

[SlushboxTeggy]

thanks

 

[crx]

the older rx7s are top feed, i got mine from two 88's and there 460cc's