Twin engine gearbox?

[Ben]

Can someone tell me if a kit that would have the gear case for connecting two engines, side by side? I know there are a few but I just can't think of them??

[Longbox55]

AMT Double Dragster. The Revell Roth Mysterion should have one, too.

[GLMFAA1]

AMT Double dragster kit, has the chevy engine side by side

greg

[Ben]

Actually, the Mysterion has two transmissions and two differentials if I remember correctly? I am wanting to have two engines, side by side with one transmission, going to a single differential.

[Crazy Ed]

Tommy Ivo's Showboat has 2, so if you're looking to REALLY fire up a Mini Cooper the front set even has Steering!

[Longbox55]

You're right about Mysterion, slipped my mind at just how Roth put the thing together. On the Showboat, those engines are connected crank to crank, front to back. The engines on the right side are connected to the rear axle, the left engines connect to the front. They are not connected side to side. The Mickey Thompson Challenger is setup the same way.

[Crazy Ed]

On the Showboat, those engines are connected crank to crank, front to back. The engines on the right side are connected to the rear axle, the left engines connect to the front. They are not connected side to side. The Mickey Thompson Challenger is setup the same way.

Whoops, Guess it's be a REALLY LONG Mini

[Ace-Garageguy]

AMT Double dragster kit, has the chevy engine side by side

greg

Yup.

You're right about Mysterion, slipped my mind at just how Roth put the thing together. On the Showboat, those engines are connected crank to crank, front to back. The engines on the right side are connected to the rear axle, the left engines connect to the front. They are not connected side to side. The Mickey Thompson Challenger is setup the same way.

Ummm.no. The Challenger has 4 LaSalle 3-speed gearboxes, 1 for each engine, and each gearbox in turn drives through its own Cyclone quick-change.

The Showboat has the engines coupled end to end, as you say, and each pair of engines drives through a large champ-car quick-change. The front QC is used as the center-section on a Dodge 4WD truck front axle, to allow steering hubs.

Edited May 15, 2015 by Ace-Garageguy

[Longbox55]

I stand corrected. I know that Ivo had consulted with Thompson on setting the Showboat up, maybe it was about the steering knuckles rather than the drive setup.

[Fat Brian]

The way they run side by side engines on pulling tractors is that each engine has a torque converter or clutch in a regular bellhousing and the output shaft from it turns a pulley with a belt that runs between the two engines. There is a third pulley in the middle that connects to the transmission. This is a picture of a four engine tractor but the rear two engines have been removed and you can see how the box connects the front two engines which face forward and the rear two engines which face backwards so all four engines can feed into one box with one output shaft.

[Ace-Garageguy]

This is one of the side-by-side setups in the AMT double-dragster kit (not my model). The engines are angled to narrow the whole package (as Roth did on the Mysterion too, even though the Mysterion uses two gearboxes and two rear-end center-sections, as noted above). Bear that in mind if you're going to run carbs. The blowers and /or fuel injection don't care if the engines are angled, but carbs (which have floats in them that have to be more-or-less level) do care. Roth built manifold extensions to level the carbs on the Mysterion.

Edited May 15, 2015 by Ace-Garageguy

[Greg Myers]

Edited May 15, 2015 by Greg Myers

[Greg Myers]

http://www.autoviva.com/slideshow.php?element=news&ref_id=10679&first_id=173721

Edited May 15, 2015 by Greg Myers

[Ben]

This is one of the side-by-side setups in the AMT double-dragster kit (not my model). The engines are angled to narrow the whole package (as Roth did on the Mysterion too, even though the Mysterion uses two gearboxes and two rear-end center-sections, as noted above). Bear that in mind if you're going to run carbs. The blowers and /or fuel injection don't care if the engines are angled, but carbs (which have floats in them that have to be more-or-less level) do care. Roth built manifold extensions to level the carbs on the Mysterion.

Yea. That number 7 gear case is what I'm after! The model I'm building is fictional so I can just build a simple one from scratch. I just thought if I happen to have a kit that had one in it, I would use it. I really appreciate all the help you guys are giving though!!

[Ben]

Very odd! That would mean one of the engines runs in reverse?? I sure wouldn't trust those flywheel teeth!

[Jantrix]

Here's some pics I found on the 1:1 Hot Wheels Twin Mill.

I think this is very doable. Remove the gearbox from the bell housing. Add a sealed whos-a-whatsis gearbox and a transmission to that. I'll build something similar someday.

[Toner283]

Very odd! That would mean one of the engines runs in reverse?? I sure wouldn't trust those flywheel teeth!

That is how Tommy Ivo's twin nailhead rail was set up IIRC. Reverse running V8 engines are not uncommon. Most twin engined marine applications have one engine running in reverse. Different cam and a starter to spin it over backwards are the two biggest differences.

[Greg Myers]

Love this pic.

[Force]

Very odd! That would mean one of the engines runs in reverse?? I sure wouldn't trust those flywheel teeth!

Yes one engine runs in reverse, no problem to achieve, it just needs a cam shaft grinded in reverse and reverse the oil pump

If they are coupled together you only need one starter.

Edited May 16, 2015 by Force

[Crazy Ed]

Yes one engine runs in reverse, no problem to achieve, it just needs a cam shaft grinded in reverse and reverse the oil pump

If they are coupled together you only need one starter.

Or a Pickup Truck to Push Start it.