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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
 

Hayfever

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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?
 
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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.
 
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Oh - just as an fyi - summitracing.com are cheaper than here. I got 8 for $254, and no ebay hassle...
 
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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.
 
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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.
 
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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.
 
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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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