42lb or 36lb Injectors? - Page 3

grandam01 · 01-04-2012, 03:31 AM

Quote:

Originally Posted by AaronGTR

Dude, shut up already. You are an F'in idiot.

As for injector sizing.... yes, you technically can have too large an injector, even if you tune for it. There is a limit to how short you can make in injector pulse and how far you can turn down fuel pressure before you don't have a good spray pattern and get good atomization. You might be able to get the car to idle, but it won't idle well and will run dirty at low throttle. That said, I don't think 60 lb/hr injectors would really be big enough to have that issue... but I also don't think they are necessary to support the power level he will probably hit with the other hardware he is planning to use. I think 42's would be enough. But ya know... do your own research and make your own decisions.

Good general rule is not to go overboard on the injectors, but pick something with at least the ability to make 20% more power than you plan on making and they should run well in the range you will run them.

I will say you are correct for the most part but 50 lb/hr would be his best bet 42 lb/hr would be for less hp and he would be close to maxing his injectors. You really do want to stay at 80% duty cycle. This puts him in the 400 bhp range. If he makes more than that then 60 lbs would be good as then he can just up the boost.

G.I.Ceo · 01-04-2012, 06:54 AM

Quote:

Originally Posted by grandam01

I will say you are correct for the most part but 50 lb/hr would be his best bet 42 lb/hr would be for less hp and he would be close to maxing his injectors. You really do want to stay at 80% duty cycle. This puts him in the 400 bhp range. If he makes more than that then 60 lbs would be good as then he can just up the boost.

Well 400bhp would be nice but I don't think I will be able to make that because of the internals of the motor. I have not decided yet how much of the internals I want to build up on the motor. I'm pretty sure I want to do a cam and some small stuff stuff like lifters, and springs. I am thinking too to switching to a 3500 motor and build the turbo off of that. Once I buy my turbo and I start piecing it together then I will decide exactly how far I want to take this. One thing at a time and like I said I am not in a rush because I want to make sure it's right.

zukiracer19 · 01-04-2012, 12:58 PM

I ran my zzp mototron 60's injectors for what 3 years with no issues... i had to mod up the rail bracket. but that was about it. All I can say is... Transmissions are a joke. Only horrible experience with my car. Also anything above 12 psi you'll need a fuel pump, other then she ran like a raped ape.

I ran a goat on 10 psi and completely crapped all over it, your car should make well over 300 with that setup.

01-04-2012, 12:58 PM	#43
zukiracer19 BoOsTiN' AKA: slograndam Join Date: Sep 2007 Location: State College, PA Posts: 2,700 Vehicle: ev0m0de	I ran my zzp mototron 60's injectors for what 3 years with no issues... i had to mod up the rail bracket. but that was about it. All I can say is... Transmissions are a joke. Only horrible experience with my car. Also anything above 12 psi you'll need a fuel pump, other then she ran like a raped ape. I ran a goat on 10 psi and completely crapped all over it, your car should make well over 300 with that setup.