A friend of mine made me an offer last week to have me work on his vehicles and help him tune them in. I'll be working on an 82' RX-7 and a 1979 Mercedes 450SLC 5.0, very cool. When finished the RX-7 may see a few sundays at the local airport with me behind the wheel.

The RX-7 had lost compression and the motor was replaced with an 85' 12A. Unfortunately there was difficulty with the carburetor and the secondaries weren't opening. So I was tasked with replacing the vacuum nest , carb, and intake manifold. After talking with my pal on the phone and having never seen a carbureted Wankel I took the job. I've since removed the mess and I've been cleaning the engine. We'll be replacing the manifold with one that has been "liberated" on the engine side. I also decided to remove material from the carburetor side of the intake manifold in a search for linear power output and more of it. I was surprised to see all of the obtusions in the cast manifold. I am an amateur at this sort of thing so please offer advice if you can. We have extra manifolds laying around that I can start fresh should I need to.

Pictures here, http://www.yamscarclub.com/gallery/My-pal-Skip

Are there any picture guides for removing material from a carbureted intake manifold? If not, I may be able to help with one of the other manifolds I have access to once this project is complete.

 

Can someone point me to the direction of editing posts?
Here are some pictures:
A dirty 85' 12A but they all come that way.

3/4 Profile, note the Shop Towel dispenser

I cleaned things up a bit but I'm not finished yet.

The manifold needs to be liberated of some obtrusive material.

After removing some material. I plan to take at least another five or six hours on this side.

 

car looks good man

i'm not sure how much power you'll gain by porting the manifolds, though. you'll have to factor in turbolence and how much the engine can take with stock internals..

search around a bit im sure you'll find some good info.

 

Well my goal with removing and adding material is to facilitate a more ideal flow path. I have to work with what I have.

Monday morning, some nice pictures for everyone to look at.

 

Any help or advice before I go off to work on her this evening?