Flathead Combustion Chamber Cut-a-Way

Very Nice......Be a great tech article in a rat rod magazine?

 

That is a good idea on the vacuum tied into the blocks but for now I am changing manifolds and still need the vacuum for the map and fuel regulator and want to do it without ruining the manifold I will be using. I am planning on small 3/16 lines to a common manifold and pull vacuum from there. I will use the air bleed idle screw ports on the carburetors drilled out to .060" under each throttle valve and then can enlarge them if needed. I think if I don't hold the orifice small the vacuum will bleed from one cylinder to the other and not show much vacuum at all but with the small orifice and the common manifold I think I can get by with it. I can blend as much tps as I need with the map for acceleration and load. If I go to the hidden injectors I will for sure port from them to hide those also, thanks for the idea. I have the tps mounted in the back carburetor and works great, posting a picture of it installed. I am probably the worlds dumbest on fuel injection but like you I have been reading a lot and the hands on makes for some interesting problems, all self caused. Looks like you have a fun project coming up also on the Hilborn blower injector conversion.




Vergil

 

Hi Vergil, I liked your pictures of the cut block and was interested to read that you're thinking about putting injectors in the block. I did this about five years ago on my street flathead, I have about 15,000 miles on it now and it works a treat. I used side-entry injectors from a Nissan VG30 engine, mounted horizontally in the valve chamber and squirting at the backs of the valves. It needed hardly any machining on the block, just a few holes drilled. It's a tight squeeze but just fits. Maybe I'll post some pictures if I can figure out how to do it. PS. I just looked at that engine on E-bay and was intrigued to see how similar it is to what I've done, and pleased to think that I'm not the only one silly enough to do this sort of thing. Mine is way simpler in terms of the machining required and I didn't even strip the engine to do it, just removed the heads, manifold and intake valves. My injector blocks are made of Tufnol to reduce heat transfer to the fuel but aluminium may be okay. I have learned heaps about injecting flatheads through this project and am happy to share information.

 

Allen I would sure like to see your setup. If you want to send the pictures to me by email I can post them here for you.

 

Vergil,

Could you share some info on the exhaust p***ages from the valve to the block outlets? Any pic's of tis area available. I have copies on the intake runners from one of Flatdog's old posts but no info on the exhaust runners.

Thanks,

Jim

 

These pictures are some that I took of the rear exhaust port, never thought to cut the front one open. The first picture is hard to see what I was trying to show but it shows the cut line at the roof of the port and you can see in the pictures the mini castle by the outer port and just finished another flathead which also had these in both back ports, hope these pictures help or if you need a certain area I can maybe help you out with a picture.

Vergil

 

Very interesting! Thanks for all your work.

 

Your showing off your band saw skills, hahaha just kidding. Thanks for the post very informative.

 

Vergil,

Thanks for the additional pic's that helps clear things up. Yes that "castle" is interesting may have been to support the pattern mold during the pouring of the block.

Jim

 

Thanks that was cool to see! I agree this should be archived!

 

Very useful information greetings from a 8ba owners in Finland.

 

I now have first hand knowledge of the flathead Ford and how "the wind blows" inside those heads. Have been a mystery to me for quite some time thanks for the excellent post Two thumbs up -freezer