I know this subject has “been round the block” a few times but here goes :-

I have a Rat Roaster RR3 single 4bbl intake for a Hemi. I understand there are better options available now but that could be said for everything. It’s a cool item and I would like to make it work.
It’s obviously tricky to run just by the fact there are not many fitted on engines but many for sale, but that said, I have read older threads that people have run them in the past with minimal issues.

Problem 1 … I understand they puddle and can backfire and explode the manifold. Fixes range from:-

1. Use epoxy or weld to fill in the puddling areas.
2. Start engine with open throttle.
3. Use a secondary ignition switch to fire the engine after turning over a few times.
4. Fit a nitrous/Blower fail safe valve to rear of manifold to avoid manifold damage.

Problem 2 … Poor low range operation.
Problem 3 … Poor fuel distribution.

Is the internal divider only for dual 4bbl in line and dual cross?

Note, I have talked with a few respected people so far and their advice and opinions are valued and probably reflect the above.

I know this is going to be challenging but is there anyone out there who has successfully run a RR3 single 4bbl with a 4500 (or other a with an adaptor plate) on the street.

What about using a EFI throttle body on RR3 or modifying the internal base for Multi-port injection … anyone played with that?

Any advice is appreciated.