spoonman

hi guys hows it going? i was just wondering what size injectors i should be looking at for a 300-400 whp setup. it will be a low impedance setting on obd0 so an help would be appreciated, thanks

lock-pop!

650-750cc

jmhalder

http://www.witchhunter.com/injectorcalc1.php4

HiProfile

An easy way to calc this for Hondas is (CC x 0.7 = max WHP). Use 0.6 if you have a crappy pump. So if you want 400whp, its 400 / 0.7 = ~571cc minimum. 650-750 would be best.

spoonman

tyvm guys! i appreciate the fast posts, i was thinking around 600cc just by using comparison builds but had no way of calculatiing. Again thanks i appreciate it!

Slo_crx1

I would lean more towards 750's and set your injector scaling lower...say around 715-720 or so. Helps with larger injector idling issues.

cornfuzed

what size engine?

also i recomend a program called virtual engine calculator 2005 it is a free program (just google it you will find it)
and it will tell you all kind of stuff like injector sizing and it calculates torque baised on hp and at what rpm it makes full power (same for the reverse)
also it can tell you howmuch your heads can flow and 1/4 mile times based on hp and weigh, it dose some cool ----


but for a 4cyc to make 400whp it says you need 787cc injectors

also it calculates comp ratios gearing mph all kind of kewl ----