993turbo

For my supercharger build Im planning to use 42lb injectors.

Which injectors do you recommend, and why. Who sells flowmatched sets?

atb

What kind of budget are you working with?

rgs944

If you already decided on 42lbs injectors that means you are quite a ways along in the planning process. You should start a thread dedicated to your build so we can follow and guys here can give advice along the way.

993turbo

Open for suggestions.

Been looking at Bosch green ''Ford Motorsport'' ones....

993turbo

Sentrifugal Compressor / SuperMAF / air - water intercooler / 42lb injectors / sharktuning with PEMS / X-pipe / fresh engine.



Lets keep this thread to the injectors only, please.

atb

The green giants are popular, and should work well.

Have you checked out Five O motorsports?

Is there any issues with international shipping? If not I believe these guys are pretty reputable.

993turbo

Not checked ''Five O''...

Ive used the Bosch Green a few years back in a Cosworth engine I built. 8 of them on a 4 cyl engine. Was happy with them there.

It says mfg guarantees 2-3% flowmatch from new. I take it this is suffucient?

dprantl

I'm using M-9593-F302. They work well.

Dan
'91 928GT S/C 475hp/460lb.ft

993turbo

M-9593-F302 is 0280155968 which again is the ''green giant''....

Do they drop right in? No dremeling required?

What duty cycle are you maxing with the 42lb injectors and your 475hp...?

Speedtoys

36lb on the same kit at 9psi is about 80% load.

I would consider stopping at 36.

Interesting issues as you go larger are expected.

993turbo

Could you elaborate on the interesting issues?

Speedtoys

I'm
Mobile so can't add links. But fuel system harmonics have become a show stopper on 60lb injectors.

Putting the 36s back in.

dprantl

Although I have a custom intake manifold, I am pretty sure that these injectors do not require any modification to fit the stock fuel rails and clips and are direct drop-ins.

I am seeing just over 70% duty cycle on the green giants at 6,700RPM. It has been a few years and a bunch of changes since I dynoed at 475hp (406rwhp) so I am probably closer to ~510hp now. I am currently running an Eaton M112 which is most probably less efficient than a centrifugal compressor that you plan to run.

Dan
'91 928GT S/C 475hp/460lb.ft

ptuomov

I have sixty pounders and they work just fine for me. The injectors were sourced by John Kuhn. We talked about it, and flow matching is not a terribly relevant thing with the stock manifold and batch fire system. With this intake manifold, you're never going to be that close to balanced.

atb

Are you running all of the stock dampers? I'm surprised to hear this.