The fuel and nitrous doesnt combine until it reaches the nossle exit,the jetting size does not effect the mixture quality. Well,first off,how bigs your fuel pump,male sure it can handle it first (just a opinion,but everyone seems to have a large pump then they need,witch is good)? I assume you have run new fuel lines -6AN or bigger. Put a dist. block or fuel log on your feed line and run both your regulators off of that (the reg. for the EFi and the reg. for the nistrous system). Oh,and also equal length,DOESNT MATTER! You know how fast a molecule of nitrous is traveling? The distances we are talking are probably 12" at most.The fuel always arrives a little slower,but the miliseconds we are talking here arent enough to effect distribution,unless of course you got a 14' line on one side a a 14" on the other Jetting will be able to compensate for any a/f ratio differances between cylinders.
Yes,now I can explain more cleary what Im talknig about,you see where the jets are installed on the nossle? You put your oversized jets there,and replace the compression fittings with 1/16" NPT to -3AN flare jet fittings,and that would then be where the jets are placed. Or if you want to spend a little more,you could replace the fittings on the nozzles to accept a -3AN with out need for jet to seal the flare (not sure on the size of the nozzle trheads,its a small straigth thread)
No new fuel lines yet... I managed a good AFR with the stock setup but a fule system upgrade would def be required. Fuel pump is a Walboro 255L backed up by Boost-a-pump (currently set to zero. Right now, it serves as a voltage regulator and that's all). Future mods include porting the GT40 lower, port matching to the KB, Porting of the blower inlet, new rails, steel braided fuel line from tank to rails. Why so many questions? I'm comparing the feasability of this type of system vs. a multi fogger wet system.
Nope. The fuel and nitrous dont combine till they exit the NOZsle,right infront of the fuel injector orfice. Over in the UK alot of kits are made this way actualy,with the jets at the solinoid.
Hmmmmmm.... that might be the way to go. Lemme as you this though... How do folks normally go about adjusting AFR in each cylinder (for the initial jet install, of course)? Are they installing probes in each of their header tubes?
Well,your gunna need a fuel system that will support the sudden demand for fuel when you activate the your ntrous system. Another route is to make a dedicated fuel system for your nitrous kit,with a small pump and lines,that only come on when you arm it,that can save on amprage draw that a large pump would need too. Oh,and if you want to experiment a little,a universal EFI system plumed in the blower inlet (single nossle) will give you a pretty big boost in power (another 150Hp is easy).Give KB a call and ask them if the clearance between the scerws will be ok for the extra fuel (most likey it will be,I know my Eaton M112 doesnt mind 75Hp worth going though it).
Would be nice but I don't think feeding Fuel and nitrous through a twin screw is normal practice. I'm also not so sure that a MONSTER fuel system is going to be needed for a 200 shot.
Most people put whatever NOS suggest,witch is usualy out a ways on the rich side,but not so much as to cause fuel to leak bye the rings (witch can damage a piston by lifting the ring land,it littery folds the piston crown edge up,happens when EXTREMLY rich). No real way that I know of to adjust fuel pressure for each cylinder,other than setting up 8 FPRs,jetting changes will be what will adjust your a/f ratio per cylinder (say one cylinder is a little rich with 24N/16F jet,change that one clyinder to a .024 nitrous jet to even it out). You mean EGT probes? Not many I know of doing that,maybe some of the guys runing alcohol with theirs,might put two in if you wanted to feel safe,but a wideband A/F ratio is all you would need. Or if you go to the track alot, learn to read the plugs
Tomorrow if you're around, I'll try and describe the "other" method I'd thought about using and see what you think. Thanks for the responses!
TAFC/TAD and ProMOD do it (fuel part) No,I just dont know what the capibility of the 255lph pump is,cause I dont want to do the math at 12:11Am,lol. But if you got the boost-a-pump,you could have it wired so it will give it more fuel when you active the kit.
Oh,and for refrance the NOZsle kit instructions: http://www.holley.com/data/Products/Technical/199R10273.pdf
