I am going to be converting an alcohol BBC to EFI and want to use one of the Edelbrock "Victor" series manifolds. The motor is a race only 60 over 427 that I will be spinning to 7-7,500rpm. The Vic Jr. seems the right choice. Any comments?

Rich

 

What EFI system are you planning on using? The choice of manifolds will be different if it is moving air/fuel mixture of just air. Some more info please.

 

I am going to be using an Electromotive TEC3r to control 8 port injectors (or 16 if needed). So, the manifold will be intended to flow air only. I have an Accel throttle body that I would also like to use. It has a 4150 type flange.

Thanks

Rich

 

I believe since the manifold was designed around fuel and air it becomes more high flow friendly with just the air. If its boosted I would make the plenum the same cubic inch of the engine and not use that TB. When i did my Typhoon one I *aimed* the injectors right at the back of the valve.
If NA I think you will be fine.

 

Consider 8 port and 4 plenum injectors to take advantage of alchohol's vaporization cooling effects. The double+ fuel requirement will displace air so anything you can do to make the intake air denser will help pick the power back up towards where it would be on gas. You could make an injector mounting plate to go under the throttle body.

 

Yeah that would be cool and take some work.... With a Elbow you could shoot the pleanum injectors at each pair of ports like a carb would... It would take some talent to do but would be cool to see. Seems like that would work better than mounting them horizontally in a spacer.

I like that idea for cooling the intake!

Bret

 

What about drilling an injection port above each pair of runners, but aimed at a somewhat downward angle and across the plenum at the opposite corner?

 

To me, not having to try to put both fuel and air through the manifold is one of the potential advantages of port fuel injection. As far as cooling the intake air, this is going to be a fairly mild NA motor. The idea of going to EFI is to run it with the carb/conventional ignition and then with EFI/ignition system with as few other changes as possible. I have some more changes planned after that, but I am very curious to see how the two compare when it comes to consistency - which is essential for bracket racing. As far as the local scene goes, there is no one running an alcohol/EFI combo and I want to see how it works.

Rich

 

I believe that's is mostly because of the high maintenance of the corrosive alcohol.

I used to run my IHRA T/D altered with a mechanical fuel injection and alky.
I don't believe you need to put any injector's in the plenum, most manifolds on alky will ice anyway. I had port injectors on my tunnel ram and the whole manifold still iced. Problems I ran into was storage of the alky and corrosion. Even though I ran fuel lube/ top end lube I would need to drain the whole system between races (2-3 weeks for us) and I would also spray some trans fluid in the hat when I shut it down. Near the end I ended up just putting some regular gas in the tank at the end of a race and starting it so that would clean all of the alky out and coat the inside of the engine.

My car never picked up a lot but I ran it as I had no cooling system. I believe with a DFI you will find some power but watch out for corrosion on those fuel injectors, lines, tank and pump.