Technical How do multiple engines get connected?

Rocky used a reversed cam in one motor.


Sent from my iPhone using The H.A.M.B. mobile app

 

funny you should mention this project, as I'm building a twin V-8 hot rod right now, I'm in the middle of the paint stage now so I don't have any completed pics but it will be two SBC -350's end to end using a couple sprockets and double roller chain, gonna time them #1 to #1, the only difference when changing the engine to engine timing is the sound of the exhaust. the power stays the same no matter how they're timed to each other.

 

At 2:30 in this vid, Tommy talks about the firing order on the Showboat. They evenly spaced the firing pulses as a V-16 for smoother power delivery. 2 cylinders firing at the same time could shock load the tires and make them more likely to break loose.

 

Just saw a really unique flathead powered twin at TROG West yesterday. Second engine was coupled to the rear end and the front engine was in a more or less standard location. No idea how everything hooked up together or how well it performs and sorry no pictures. Maybe someone will post some photos if they see it today at the races.

 

I totally have respect for Ivo as a showman and a racer, but seriously... if you dump the clutch with 4 motors spinning at 9 grand do you really think there will be any feel at all at the tires for when cylinders are firing? It's a m*** of spinning metal from the front of the crank to the back axles... Newton had it right... objects in motion tend to stay in motion...

 

These were posted by Mr48Chevy here on the HAMB.

 

Seems to me that the teeth would strip off. The starter can do it. The engine has to put out much more power. It's a lot of force to put on a couple of teeth. A chain around a sprocket exerts the force on many teeth.
The nice thing about rotating them opposite directions is they cancel out the Coriolis effects.

 

The truck in post #36 is the truck or a clone of the truck that I mentioned in post #13. And several drag cars used the meshed ring gear method. Starting with Howard Johanson. Had two ring gears on each flywheel and they were welded to the flywheels or tabs that had bolts into the flywheel. Worked great. I was told that between rounds thrashing made lining up TDC between the two impractical. And did not do anything one way or the other. The car was run with engines that were very mismatched on occasion. It still worked.

 

Katuna, I thought so but got side tracked with Seb Fontana's reply. Seb isn't entirely right nor wrong, he just had me going for a second thinking the cam turned backward's. No, only the crank does and by using a geared timing set the cam turns in the correct direction. That is also why he mentioned the marine engine. They also use a "reverse cam" (just a term) because only the lobes are arranged in the reverse formation. Anyone else just as ?

 

A starter isn't the same as two gears (flywheels) in constant mesh. A starter has to throw it's gear into mesh therefore if any one of several things goes wrong during engagement things will get ugly.

 

Does that mean the intake charge spirals the opposite direction in each engine, or do they both go straight?[emoji12]

 

My closet friend had a pull tractor until health problems came up and he told me a guy in Ohio (I think) came up with a power transmission box that lets each engine be independent of the others and tuned for top power rather than matching power. I recall he said the price on the unit was around 20k. The engines are only mated to the box and not each other. Oh yeah, it's NOISY.