Double checked the radiator. It isn’t as broken as I thought.
A few pinhole leaks.
Exhaust is smoking worse than it ever did. Even after warm up it is still smoking. Not sure what could have made it to that from the accident. It’s ran since the accident so any oil in the valves should have been burned out.
How long was it upside down? Long enough that maybe oil got into the exhaust system?
It was upside down for about 30 minutes I think. I checked the oil today and it was a quart low. Looks like a lot went through my OHC cover vent.
Going to try to remove the bed of the truck tomorrow and Monday. I’ll need to figure how I’ll mount the fuel filler neck. I might bring it back near the tail of the truck to keep it out of the way from the side.
I’ve been thinking of getting a throttle body made for the Mazda to fully convert it to woodgas. If I’m going to be running it on raw wood then it would just be tearing up that relatively new Weber carburetor. It’s a bit of a chore going back and forth between gasoline and charcoal gas as it was, usually from residual soot getting into my jets. Also had to have a higher idle setting and out of whack AFR adjustment on the carb.
@bsoutherland did this with his MGB. I’m wondering if I can find a cable controlled throttle body that will mate up to my intake or if I’ll need to take it to a machinist to be worked on. Maybe I should see if the Kia intake manifolds will bolt to my old carbed engine, I know Mazda sold this engine to Kia in the 90s.
For the Mazda on a duel fuel system my off the wrist thought would be a side draft mikuni that would match performance of the Weber. This being mounted side draft style would make a custom intake manifold for dual fuel easy, simple gate valve to cut off the carb and a top entrance throttle body to control the woodgas. 2 control valves just above that for air mix. Could be a very small compact system this would allow full time woodgas, with a quick throw of a valve on flick of fuel pump power and back to dino
I could hook up a carb through the old EGR port. I didn’t do this with the woodgas because the orifice is so small and I didn’t think I would get enough flow.
But it might work for gasoline.
My only challenge then would be to find a throttle body that mates up. I couldn’t find any Mazda trucks in my parts yard or I’d have bought a cheap one to find out. Looks like the 1990 B2200 and the B2600 just use one big blade and have a really nice looking spot to attach a rubber hose. I don’t think they used the same bolt pattern for the intakes as I suspect these are the DOHC and mines the SOHC.
I think Bruce used a custom made intake and a GM cable controlled throttle body. I’ll have to read his thread again.
@JO_Olsson crazy request, but could you measure the bolt pattern for the throttle body on your Mazda B2600? If you can get to it without trouble at least.
I just need ballpark estimate to compare against my old Mazda carburetor to see if it will fit my intake. Bolt head to bolt head would suffice I don’t need anything too precise.
Edit: scratch that the prices for those throttle bodies are ridiculous nevermind.
Cody,
Maybe you can find a junk Mazda for spare parts.
I keep a spare truck I got for free. I have one tb sitting on the shelf, clean it manually and switch every 6 months or whenever burning it is no longer sufficient to make it move freely.
Bolt pattern:
Horisontal upper cc : 3"1/16
Horisontal lower cc: 2"15/16
Vertical: 2"1/2
The lower rear bolt is the one off-set from square.
Wow. I am impressed J.O.
You used Inch fractions. And used them correctly, even.
Ahh . . . on a Made-In-Japan part you are allowed to use metric millimeters.
Most of us young (joke) U.S. guys can swing both ways.
S.U.
Ha Jo, you confiscated that wooden meter from an old roof carpenter 
Steve, Swedes can be swingers too, you know 
Tone, they still make folding rulers like that here, even though some only have the metric scale nowdays. I prefer using inches sometimes, especially when dealing with dimentional lumber and plumbing.
The Swedish word for inch is tum (thumb) btw
Yeah my footprint is way too different. Not that surprised considering it uses a two barrel carburetor.
I may gut the old carb to use for just woodgas and run a big moto carb like Marcus suggested. This thing looks like a Gordian knot of vacuum SMOG regulations.
I should probably just find a machine shop to make an adapter plate. Trying to think of a good size for a throttle body using one of the good old Chinese cable controlled ones. Maybe a 50mm bore one?
Cody remember how I made my throttle body mounts? Bang out some gaskets, trace them out on plate and cut them out with your new plasma cutter, one for the intake one for a woodgas carb one for a gasoline carb. Connect with pipe in the configuration you like and weld it up. No need to pay someone for something you have the tools to do yourself you got this!
Cody,
That carburetor reminds me of the one in my Corolla. There are at least 12 vacuum tubes connected to it, besides the electrical wiring.
Yep, there are about 6 vacuum ports in the air cleaner alone.
Instead of a gasket it had some sort of warming plate I assume to get it out of a cold start quicker. Lots of odd gizmos.
The water runs right through the intake manifold as well I assume for hotter gas or maybe to actually cool it down?
I guess in order to figure out what size throttle body I’ll need I’ll measure how wide the actual intake manifold’s cavity is. I could make a steel plate that bolts to the manifold and then to the throttle body. Hopefully with as much or less height than the Weber with a snorkel cap takes up.
I will either try to find a smaller throttle body or one with a rectangular butterfly if there even is such a thing. I would hate to choke it down to a 30mm single butterfly though just because of the width.
Maybe a 40mm will fit. I’m sure engine suction will make up for it.
Re thinking I could just make a plenum to gap the space so I could fit a more common 60mm throttle body.
Those carbs needed base plate warmers even in summer bottom section with throttle plates would freeze making throttle stick…
I might have figured a way to have my cake and eat it too.
If I make a plenum I could make one wide enough to fit my Weber in place. Since I can’t hybrid due to it being carbureted anyways I could just use a spa gate valve to be either wide open or shut closed.
I have plenty of room between the manifold and the valve cover, same can be said from the manifold to my fenderwell. I can shut my butterfly valve on the woodgas side of things.
It’ll take a lot of thinking to make it but I believe i can pull it off. Before I put woodgas to this Mazda I managed to keep really good fuel economy with the Weber and free flowing exhaust.
I’ve heard that making expansion chambers for carbs can increase the fuel economy. Must help to atomize better?
