Least expensive way to get EFI on a dinosaur engine?

[Russell]

I think stock mustang 5.0 injectors are 19 lbs.

[milner351]

Yup - the yellow / mustard color ford injectors are 19lb, blue are 24, red are 32 (correct me if I'm wrong here)

Scott - are the low / high impedance injectors also the "pencil" vs "widebody" injectors - or is it not that simple?

I'm thinking for the falcon - MS3 but I was hoping to start with stock 5.0 injectors - the larger diameter ones, otherwise - I'd better buy some of the coyote injectors from Roush for $50 a set before they're all gone (small diameter)

[dieselgeek]

Yup - the yellow / mustard color ford injectors are 19lb, blue are 24, red are 32 (correct me if I'm wrong here)

Scott - are the low / high impedance injectors also the "pencil" vs "widebody" injectors - or is it not that simple?

I'm thinking for the falcon - MS3 but I was hoping to start with stock 5.0 injectors - the larger diameter ones, otherwise - I'd better buy some of the coyote injectors from Roush for $50 a set before they're all gone (small diameter)

Injector body shape isn't indicative of whether or not the injectors are high current (low imp) or low (high imp). Usually the larger injectors over 42 lbs are low impedance although there are a ton of manufacturers making large flowing injectors that are now high impedance.

[milner351]

So an Ohm meter is the only way to be sure....?

[dieselgeek]

So an Ohm meter is the only way to be sure....?

Yes, if the manufacturer doesn't give you that information already. 5 ohms and less would be low impedance. 11 ohms and up would be high impedance.

[Thumpin455]

This is answering lots of questions, cant wait to get building this thing. Scott you know I will be calling you when I get it together, might end up taking you fishing at some point if you can get away from work and come up here.

[Beagle]

For true rails I like the extruded aluminum you can buy almost anywhere, drill it yourself. But a few companies, BDS is one, thread injector bodies letting you run an individual hose to the injector versus using a rail. That allows grouping secondary injectors in a circle around an air charge pipe, upstream of the throttle body, leaving room for conventional injectors aimed at the intake valves.

x2 - and pretty cheap. Check around on that. Maybe a group purchase on several feet would be even cheaper. Hit me up if you are interested, aluminum is light. Not too much postage I'd think.

BBR did a SB Mopar manifold many moons ago and made it look easy.
http://bigblockranger.com/Intakeconversion.html

[Bamfster]

x2 - and pretty cheap. Check around on that. Maybe a group purchase on several feet would be even cheaper. Hit me up if you are interested, aluminum is light. Not too much postage I'd think.

BBR did a SB Mopar manifold many moons ago and made it look easy.
http://bigblockranger.com/Intakeconversion.html

I'm in on a group buy!....

[milner351]

I say we at least try to group buy a good injector seat cutter, it looks like $65 will buy a pair of 17" rails and 8 injector bungs, but I'm not sure the bungs are a great idea (pre machined - shape change during welding?)

[hauen]

I've only ever seen injector seat cutters for direct injected diesels. However, when researching a while back I ran across this page http://www.sdsefi.com/techrail.htm which it looks like if you have a little distortion after welding, you can easily machine it out.

[dieselgeek]

This is answering lots of questions, cant wait to get building this thing. Scott you know I will be calling you when I get it together, might end up taking you fishing at some point if you can get away from work and come up here.

I'm totally up for a fishing trip, you're in the U.P. right?

[Bob Holmes]

There is a specific injector stepped drill. I'm sort of surprised that we don't already own one.

[CDMBill]

The good news is that for a typical single plane manifold there are now lots of choices with bungs already cast in the can bought, traded for etc. The other nice aspect is that the donut shaped rings that seal the injector to the bung and the rail allow for a lot of mis-alignment and irregularity in the respective bores. The net is everything doesn't have to be perfect to have a leak free installation. Then there are bungs that can be bought or made form bar stock and either JB welded or tigged into manifolds that lack bungs. Finally the support for the rail can be a simple as a bent piece of flat stock. My first single four barrel TB was setup this way. Generic rails/extruded stock have gotten to be really cheap for individual purchase on eBay so I wonder about bulk purchase below the 100's of pieces.

The more interesting question is the precise placement of the injector; is it square to the bung and rail or is there angle which would better place the spray cone at the back of the intake valve in a more or less traditional location. If an angle is required either a mill or a multi-axis drill press will help when using the injector bung/rail bit.

[Thumpin455]

Ok the timing is right, the $$$ is here, or close to it so I can start on this thing. If you have any deals on MS3 systems, or something that will work post it up or send me a note. Still havent decided on the injectors, part of me wants to go Nascar style right under the TB, but the easier way might be lower in the ports like a factory setup. It would be nice to get the intake good and warm to vaporize the fuel better and have a bit more distance to put the LHoV effect to work for me.

A complete port setup is $3000+ for these engines, so if I cant do it cheaper than that I might as well just save a bit more and get the kit with everything in it. The new 2.0 EZ is supposed to work with my fuel, but havent seen one of them yet.

I can get this intake now from Summit and its the same one I was planning to run but with the bungs and everything already done. Edelbrock has rails too so that is solved.

Need to figure out injectors, wiring(unless the MS comes with something I can use), cam and crank position, and a throttle body. As long as I can use the wideband that is going under it to tune the Qjet, that is handled too.

[Thumpin455]

Two years, crap. Life happens.

Anyway it occured to me that I have two junkyards brimming with stuff that aren't pricing stuff like it's made of platinum. Might as well get started collecting parts for a couple engines. You guys still up to help out?