PDA

View Full Version : Multiple engines???

yellowxj
October 30th, 2006, 19:03
How do those multi engine tractor pulling rigs connect all the engines together...I havent been able to find info on any of the tractor pulling association web sites...anyone know?

I've got a vague plan and a pair of 4.0's...:roll: :roll:
GSequoia
October 30th, 2006, 19:18
Magic.
Kittrell
October 30th, 2006, 19:21
Magic.

I knew it!
rocklandxjer
October 30th, 2006, 19:35
its the hyper conundrumating gyrolitic sequencer flywheel clutch fluxes

am i the only one who knows this...:dunno:
Art Triggs
October 30th, 2006, 19:57
its the hyper conundrumating gyrolitic sequencer flywheel clutch fluxes

am i the only one who knows this...:dunno:

no, not anymore.............:conceited
rocklandxjer
October 30th, 2006, 20:02
heh heh

ive actually wondered this myself... i just figured they were chain driven to some sort of enourmous flywheel and shaft that connects to whatever else lays behind those monsters...
Beej
October 30th, 2006, 20:29
They use crossboxes to connect the motors to the same driveshaft...
5-90
October 30th, 2006, 21:26
Special driveshaft couplings made from pure unadulterated unobtanium...

In seriousness, I should probably look into this for my own information...

5-90
CRASH
October 31st, 2006, 07:20
Custom gear boxes, preceded by custom torque converters. You need a little slop to make up for the obvious synchronization difficulties.
yellowxj
October 31st, 2006, 17:01
I've found web sites that make chain drive tcases for mud racers and sand dragger., but nothing about the drive systems...

FYI... two people on ebay sell adulterated unobtanium but they're both from mississippi and just giggle when I ask how the adulteration process works...
RichP
October 31st, 2006, 18:36
Depends on whether they are inline or parallel...the inlines are tough as the connection is purley mechanical so timing gets veeeerrrrryyyyy interesting. A guy did it when I was back in HS with two ford blue engines, straight 6's, out of falcons. Did he do it right, don't know but the darn things worked.
yellowxj
October 31st, 2006, 19:07
I figured I could mount them side by side and use a big sprocket and chain to connect them to a sprocket mounted to a auto trans...but I would want to be able to run on just one engine without having to run both...so I need some sort of centrifical clutch on each engine....I guess its just too much of a pain...
would have been neat....going to put a big block in on propane i reckon
old_man
October 31st, 2006, 19:17
On inline engines, the common method is to have them simply in series. The front engine has a shaft out the back that has a sprocket on it. The rear engine has a shaft out the front that has the same size sprocket on it. The sprocket (motors) are lined up and the sprockets are placed side by side and a double row roller chain is used to couple the two engines together. I have seen some that have a custom designed connection between the engines that has a urethane damper in it, but they are not that common.

On the side by side setups, they are mostly just simple roller chain drives.
Matthew Currie
October 31st, 2006, 20:12
I figured I could mount them side by side and use a big sprocket and chain to connect them to a sprocket mounted to a auto trans...but I would want to be able to run on just one engine without having to run both...so I need some sort of centrifical clutch on each engine....I guess its just too much of a pain...
would have been neat....going to put a big block in on propane i reckon

If you were doing this for economy and power, and always shut down the same engine, you'd only have to put the extra clutch on that one. The one that always runs wouldn't need one.

Or you could just design a cylinder deactivation system for a V10.