L134 twin carb

I am constructing a twin carb set up using locally sourced GM/Holden parts from the 1960's. There are quite a few advantages to this. Cheaper and readily available here unlike Carter carbs. And readily tuneable with an adjustable main jet.



Twin carb set-up (186 ci engine)   Stromberg Carburettor           Adjustable main jet

Needless to say an adjustable main jet makes the difference. Plus the accelerator pump has 3 positions as well. I have even fitted these myself and driven with them and they are very effective at all rpm ranges. Actually even the oil pump from the 186 is rumored to fit the Willys with some mods namely distributor engagement. Advantage, full flow oil filtration. I have seen the photo of one. Next little upgrade project after this one.

Strombergs were part of the Bendix-Stromberg group and developed separately from Carter.

I managed to cut the old intake manifold right next to the heat box. Ithen cut the tube abount 1" from the flange and turned them both 90* Welding was interesting however a packet of satincraft rods seems to do the trick. I welded both inside and outside and ground it smooth inside with a carbide burr and outside bench grinder and angle grinder. I will finish it off better later.


Looking down from top                                                              Side view

The exhaust manifold is from a F134. One broken stud to remove. I hate that job. The block is actually a F134 and still even has the bolt holes for the L134  intake. Just how similar these engines are is unreal.

Next job is to notch the uprights and cut the pipe (piece of offcut galvo pipe, yuk ) and sit it half way.

Then I will make a small extension on the up rights about a 1 1/2" and groove to suit the crossover. Add on some flanges to suit the carbs, clean up and get it HPC coated. Silver.

Moving on. Put the carby flanges on. I have only welded the inside as yet. Next job is to clean up and finish welding. Then dummy up the carbs and join them as one. Take off, clean up as necessary, sand, sandblast and HPC coat to look like a bought one rather than a collection of offcuts.

I would have loved a tig as using stick isn't very nice but it does work. I welder I am not.