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Fuel Injectors

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I must be proud of my ignorance - I'm displaying it here for all to see.

I have to buy a set of 42lb fuel injectors for a custom intake. This is what the guy who made it tells me that I need.

[ QUOTE ]
The injectors to be used are the STD 14 mm bung such as Siemens or Bosch.

[/ QUOTE ]

So I go to everyones favorite bargain shop - Ebay - and find a set of 8 of these for about $35 apiece new:

Ford Motorsport green top injectors - Bosch P/N 0280150558

Now I'm 90% sure they are what I need, but am hoping someone who has seen them, or is a bit more familiar with the specifics can help me out with the other 10%.

/ubbthreads/images/graemlins/cheers.gif
 
Alana, the injectors used in Fords are what he's talking about (that's what I'm using too). However, aren't you port-injecting (6 injectors at the ports)? If so could you have the digits backwards? I'm using (6) Ford 24lb injectors from a 4.6L or 5.0L V8 which according to the calculator at https://www.megasquirt.info/v22manual/minj.htm are good for up to ~245hp. If you're using (6) then 42lb injectors would be good to ~425hp but I would think you're injector pulsewidth would end up being be so slow that you'd never get it to idle. Or are you stagind 2 sets of different flow rate injectors on different fuel tables?
 
I'm supercharging as well as doing EFI. That changes my BSFC to 0.6 (the speccing is for 300hp at 70% duty cycle with 0.6 BSFC). It comes out to 42.8lb or 450cc. I'm using 42lb/440cc ones.

I'm not using rising rate fuel regulation, so they need to be a bit bigger than they would otherwise.

70% is a little conservative, but I'm putting a lot of $ into the engine rebuild and I don't want it to go lean because of fuel supply problems and blow something expensive. It also lets me go a bit higher if the engine looks like it might be able to cope (I should be so lucky - head flow is my biggest problem now).

I've been waiting two months now for the stupid pistons. I think I'd go postal if one blew when it was on the dyno at WOT.
 
Oh - just as an fyi - summitracing.com are cheaper than here. I got 8 for $254, and no ebay hassle...
 
Nice - good deal.

I'm getting them tomorrow from summit (the new intake manifold came today), then it's hurry up and wait for the rest of the engine.
 
Junk yard aren't bad either... Got a whole set (4) for a honda CRX I once owned for about $25 at a yard... They were all good.
 
The manifold is new, the engine for all intents and purposes will be when it's done. I figure I might as well start out with new injectors as well. One less thing to worry about.
 
nope. I went in said what I wanted... huy said back in just a minute, and he grabbed a couple wrenches and went out to the yard. Came back in about 3-4 minutes holding 4 injectors. /ubbthreads/images/graemlins/grin.gif It's a great junkyard, but that one only has honda/acura parts. Most of the yards around here have specialized in particular cars these days.
 
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