So when I originally purchased my RX7 before selling it to my friend the PO gave me a carb and a extra diff but I wasnt sure what it was.

Today I went and picked up the parts and found out that it was an authentic weber 45 DCOE. Sadly I dont have the side draft adapter but from what I can find it has to be a side draft.

Now my question is if I were to bridgeport the 12a is the carb going to be big enough or should I just use my Nikki carb and sell the weber to fund a bigger carb? I wanted to go sidedraft anyways so I would rather rebuild it and keep it.....

Thanks for your help guys!
Been a while since I have had to play with carbs and I never really did get a good understanding of them.

 

General consensus is that the 45 is big enough for stock ports and *maybe* enough for a street port 12A.

I ran one on my 6 port 13B without issue, but it ran much better on a 48 DCO.

 

45 should be great on a stock port, good on a street port, but i wouldn't use it on a bridge. unless you built a bridge that was setup for midrange power (earlier closing ports).

 

Thats kind of a bummer!
The PO that gave it to me said it was a streetported motor but I have no proof of it.
It was at one point running a higher flow fuel pump until it died and i replaced it with a stock one but he mentioned that the Nikki carb was running better for a daily then the weber was, although considering I dont have the side draft manifold im assuming he mounted it like a downdraft o_O

 

You can't mount it like a down draft it wouldn't work. He had to have a sidedraft manifold to make
it work.

 

Guess I never got it from him, damn......
I mean $200 for a manifold isnt really that bad I guess so I could always just rebuilt and throw it on then sell the set up later.

 

a 45 is pretty much too small for a bridgey, but should be fine for a stock or a street port 12A. Pull the jets out of the carb and let us know how its jetted, and I could let u know roughly what type of port it was jetted for. The smaller idle jet will be 2 #'s, a letter, and another # (i.e 65F9), then the larger of the jet assemblies will actually have 3 parts, the bottom jet will have 3 #'s, the large middle section (emulsion tube) will have a letter and a # or 2 (ie. F11, or F9), and the very top, underneath the threaded portion is the air bleed, will likely be a 3 digit #

 

Screw this carb. Don't mess with it, probably why the PO didn't run it. Throw mine off a bridge so no one else has to mess with the p.o.s.

 

Idle Jet is 60F9
Main Jet is 180, air corrector is 150 and emulsion tube is F9

Sorry for late response had to go get the carb from where it was being stored lol.

 

Thats a stock port jetting (dont really hear of many F9 emulsion tubes used in a rotary tho)

 

I would rather have the side draft but at the same time the nikki carb is running fine and im sure I could get more money for weber....

That and I need a intake manifold for it......UGHHHH

Decisions lol, thanks stinkfist

 

seems like that should run nicely.

 

agreed

 

I'm always confused when people say the 45DCOE sucks. I've been DD one on my stock port 12a for a while now and it runs like a champ in hot AND cool weather. I think people don't understand that Webers DON'T work on rotaries right out of the box, and you MUST alter the jetting etc. before they'll even get started. But once that's done, it makes your little stock port 12a feel like it can hang with much bigger cars.

Leks

 

agreed. it took a while but i have an IDA on the P port and it runs really nicely

 

Awesome, hopefully I can nab the Manifold of Stinkfist and run this.
At lease there easy to sell when I dont need it anymore!

 

What size fuel line/hose do you run on that? Maybe smaller fuel hose will help in my case. I'll know soon.

 

The same size line that fed the Nikki actually.

 

bam, hit the nail on the head!