xander1100

i did the calculation sheet on RC and it said that i would need atleast 690cc injectors....for my set up (see signature+a 2.5" dp+elbow and 18PSI actuator) is that right? i've seen several posts where for my goals (300-350hp) 440s are being used. im asking because i have a set of 440cc injectors and some 750s so im trying to decide which one to use...going to sell the other one.

locash

Use the 750's, sell the 440's.

xander1100

i know for injectors you dont want to go past 80%, but wasnt sure if there was a minimum i wanted to be over. thx for reply.

ddd4114

Shoot for having your max duty cycle at ~80% unless you plan on upgrading in the near future. You have less resolution with larger injectors, so there's no need to buy ones that are overkill for your goals.

I'd also recommend using your 750's.

xander1100

...guess i better use the 750s or chuck norris will kick my @$$....

ddd4114

Damn straight.

KWayRacing

Simple- 750s all the way. The 440s will run out before you get to 350. Injector choice should always err on the side of caution. I'm sure lots of ppl can remember buying 310s or 440s only to end up buying/using larger injectors later and feeling burned by unnecessarily having to spend more money on larger injectors. If you believe in your heart you will never seek more than 10psi/300whp safely then 440s are for you. Yeah I'm sure there are plenty of ppl making more than that on 440s but what is the injector duration/ AFR at those #s?

xander1100

no clue, just wanted input since i figured i could sell the 750s for more than the 440s (got the 750s for a steal though, $150 for a set that was only used for an hour on a dyno before the guy found out he needed a larger size). anyone looking for a set of 440s? lol

anyway did u know that chuck norris does a 9 second quarter mile with his integra? he doest drive it, he puts it on his back and runs.