42lb injectors too much?
42lb injectors too much? I'm going to be using a NOS 5177 kit. Whats the max I can spray on the stock injectors? Is it 120? Will buying 42lb injectors allow me to spray more right away? Will I need to upgrade the fuel pump and the injectors at the same time? And what kind of tuning is involved in swapping out the injectors? Lots of questions yes I know, just want to be ready for everything so I can install and have everything off the bat. 
yes 42lbders are fequently used for dry setups. You may get a lil more room by just going to the 42 lbders but it really should be accompnaied by a intank pump change as well. Those two items will alow you to get in excess of 650rwhp total to the ground. Some have used that combo with a volt blaster for 750+ rwhp.
Originally Posted by red00z
Will adding the 42lb injectors to a relatively stock LS1 work okay when the car isn't running the nitrous?
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42 Ford svo's will be about 48lb'ers at our pressure, and are the crowd favorite considering dry. Might as well go for it and a pump. If you have hp tuners it really isn't that hard to re scale for larger injectors, and there is step by step directions in tuning section. Svo 42's were my choice, and they are pretty cheap also.
Robert
Robert
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Red hard supra actually has the 42# numbers on his site. The change is working much better then trying to scale the injectors. The only thing will be the racetronix fuel pressure will be higher then the factory 58#. You can start with his numbers and
wideband from there. The best way is to wideband for A/F i know no body wants to hear that. But much cheaper then a motor.
Hawk
wideband from there. The best way is to wideband for A/F i know no body wants to hear that. But much cheaper then a motor.
Hawk
TECH Enthusiast
Joined: Sep 2003
Posts: 702
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From: Lakeland, Fl
42lb svo with 255l walbro and a boost a pump here with a constant 60-62 lbs of fuel pressure. This should support 200 dry. I also added larger fuel rail to my setup and will end up with about 200 dry on a 2 stage with the current fuel setup.
Originally Posted by 227Hawk
Red hard supra actually has the 42# numbers on his site. The change is working much better then trying to scale the injectors. The only thing will be the racetronix fuel pressure will be higher then the factory 58#. You can start with his numbers and
wideband from there. The best way is to wideband for A/F i know no body wants to hear that. But much cheaper then a motor.
Hawk
wideband from there. The best way is to wideband for A/F i know no body wants to hear that. But much cheaper then a motor.
Hawk
11 & 7 Second Clubs
Joined: Oct 2004
Posts: 1,299
Likes: 0
From: Motorhome, Freeways, Truckstops, Pits
I use 42# injectors on my motor. When I spray a 175 shot, which equates to around 500 rwhp in Denver, they only hit a max of 59% duty. You could get by with a bit less injector.
Originally Posted by JCurtin
I'm going to be using a NOS 5177 kit. Whats the max I can spray on the stock injectors? Is it 120? Will buying 42lb injectors allow me to spray more right away? Will I need to upgrade the fuel pump and the injectors at the same time? And what kind of tuning is involved in swapping out the injectors? Lots of questions yes I know, just want to be ready for everything so I can install and have everything off the bat.
