Ok so I know it has been thought about before, using a 13B intake/Fuel injection setup on a 12a.
But today I came upon a crazy easy idea
I was looking at manifolds for my new weber sidedraft and noticed the weber upper manifold is universal and it fits on the -SE lower, however if you have a 12A you need to purchase a new lower manifold...

Hmmmm...the 13B upper would fit on that wouldnt it???

My thoughts were, I should get a -SE center iron, put it in my 12a and use a weber sidedraft lower intake to connect the 13B FI manifold/etc.

What do you guys think. I think the 12A and 13B are similar enough that the system may accomodate, especially if you have a little porting?


thoughts?

 

The thing is, the se center iron ports are small and can't be ported much.

I have a RB sidedraft lower manifold for a 12a and have been thinking of machining it to accept an se fuel rail, or just a fuel rail placed just before the engine, and the rest of the se intake system above it.
A s4 intake would be even better, I think it will bolt to the RB lower also, but I only have the se set up.

 

Yes it will work and if you port the 12A plates it does ok even running the SE ECU. I have a friend that has done this.

 

The Manifold has since been painted in VHT Aluminium from a Can!

Its the done thing for 12A Turbos in Austy land, and its cheap too!

 

The S4 UIM intake pattern does not match the SE LIM. I found this out when I got out my spare RB upper to mate it to an SE LIM. Turns out the Mikuni setup I bought off of eBay a few years ago was for an S4 and not an SE. I have no idea if the RB SE UIM will mate to the 12A one or not.

Using the SE center iron for FI on a 12A is an interesting idea, but I suspect there will be a bit of custom fab work to do. At the least, one would probably need to make an adapter plate to mate the UIM to the LIM.

For bigger porting for the center iron, it might be easier to find a way to use the S4 UIM, along with a 12A center iron, then use the spot for the secondary injectors in the S4 UIM, for the primary injectors.

 

Crazy idea?? Where do you think the center housing from the -SE came from? The 12AT is a much older engine...

 

wasn't the 12AT carb'd?

 

no the 12at was fuel injected with 2 injectors. they are like the holley projection injection system . the injectors sit on top and it looks like a car with 2 injectors on top. i seen a plate made that you can just bot this s4 throttle body to it. the only thing is that the plate moves the intake away from engine a total of 1/2'' towards the firewall. ill research this plate and post it here.

 

Yeah, if you count in months instead of years.

 

Ah, so it was like a TBI; semi-direct injection.

Good point, Jeff - the 12AT was developed about the same time as the 13B that was used in the SE It came out in '82, IIRC.

 

This is why I thought I had a decent idea.
If Im thinking right the 13B -SE upper manifold should bolt right to the sidedraft lower intake manifold for the 12A
That would make the system completely bolt on, aside from having to build a 12A with -SE center iron.

I just thought it was a cool idea for someone who doesnt like to do much custom fabrication, but is competant enough to put the parts together. Ive always thought that fuel injection was nice, and that it would be cool on an old 12A.

Anyways..
As for the bigger porting of the center iron, why would the S4 upper intake change anything? I know it has more injectors, but for the sake of simplicity...

Couldnt you throw a -SE center iron in a 12a, toss on a sidedraft LIM and put it in an original GSL-SE car with all the stock F.I. gear and go?

 

With my abundance of 12A parts....If the 13B in the -SE ever goes

I know what im gonna try!!!!

 

Ummm, the 12AT had injectors in the center iron????

 

jobro...

Nice work!

 

the RB 12A bottom will mate with the RB SE upper if thats the case use the stock upper for the SE and you got your TB and everything else all you need is injectors for that portion that is!

 

I'm sure we aren't the first to think of it , as Jobro's pictures show, and peejay and Jeff20B stated.
Here's some junk I have in my garage,
se uim
RB Dell lower
12a engine

 

I didn't do it!

Friends with a machinist :P

 

It most definetly DID

 

Nice, its exciting to see that its been done.

This has definately got me thinkin....I guess if I blow the 13B I wont be too sad!