Reply to thread

Message: [QUOTE="peixinho, post: 876469, member: 12240"] Thanks for the feedback gusy... here are my thoughts on the injectors. I have been working off this theory that we should just focus on picking our nozzle size and not worry so much about the injector body. Theoretically you should be able to get any injector to run pretty similar through tuning... for example... why choose between 175/30 or 190/30??? just get the 190/30 and turn down the fuel a little to run like 175/30. In fact why not just go with a 205/30... the you get the 205/30, 190/30, 175/30, and 155/30 all in one injector. You can just use tuning to adjust the amount of fuel dumped. Now there are limits. You cant turn down the pulse width too far... so if you stick on 190/150s then you cant get them to run like 155/30 because you are limited by the amount of fuel you can pull. So pick the most amount of fuel that a certain nozzle size can dump and then pull fuel as needed. For this specific example I used a couple of calculation to determine my injector size. First off I am going off of an average of 3.33cc/hp formula. I have seen this is a very good reference for determining injector size (assuming you can use up all the fuel) For example... 500/3.33 = 151... so I would recommend 155s 600/3.33 = 180... so 175s will do it with a ton of mods, 190s will do it with less 700/3.33 = 210... so 205s will do it with a ton of mods, 215s will do it with less So with a basis of 215cc injectors I wanted to pick my nozzle size. I wanted the best atomization possible in hopes of being as efficient as possible. I also want to be able to pull enough fuel to be able to tow. so 215cc-135cc = 80cc over stock 80cc/135cc = 61% bigger than stock... that leaves me with with 75% nozzles being able to dump all the fuel I need assuming max ICP and Pulse width Now back to my theory of picking the injector body by the nozzle size and not your goal of cc's (that way I can utilize my injector size to the max). 135x75% (1.75)= 236cc of feul that 75% nozzles should dump. This correlate almost perfect with what Jesse Warren tested... he is running 350/75 and said it dumped about 240cc of fuel. So ideally I would end up with a 240/75 for my needs... but I wanted to go just slightly larger in case I wanna swap out nozzles later to 100%. Also I like the idea of the injector never being able to max out so I jumped up to 280/75 even though I think it will only put out about 240cc of fuel. So with one injector I should be able to adjust the pulse width to run like... 240/75 215/75 205/75 190/75 175/75 etc... So if you can tow with a 175/75 then you should be able to tow with a 285/75 [/QUOTE]