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Old 03-19-2002, 10:10 PM
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Post Engine couplers?

Im looking for information on engine couplers to mate two small block chevy's inline. Does this require a bracket that bolts from the bell housing area of #1 engine to the front of #2 engine to keep things inline so frame flex does not cause a problem? Also the single keyway on the front crank snout of the rear engine does not appear strong enough to keep from twisting out , any ideas? Splined crank snout or double keys? And does anyone make an ignition sinchronizer. I think I have seen these used on twin engine boats? One gear reduction starter will work to start both engines but radiator and cooling both engines may be a problem. Come on all you Old drag racers, they used to have the inliner Rails rrrrunning Hemi's, you old guys should have some answers!

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Old 03-21-2002, 08:44 PM
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Well one engine had a half size bellhouseing and a disc that a spline type shaft would fit in. On the other engine instead of a front pulley it had a splined shaft type front pulley and the bellhouseing bolted to a plate that bolted to the bolt holes in the front of the engine. ROY
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Old 03-21-2002, 09:17 PM
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roy, Thanks for the tip. I'm thinking of using a rear motorplate on the front engine made of steel and weld on the mounting brakets for the front of the rear engine. I have been checking the Mark Williams site and they make a lot of couplers for dragsters where the trans output shaft slides into a special yoke on the pinion,both which are splined. I think with some modification this might work to hook the two cranks together.
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Old 03-23-2002, 03:20 PM
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What I did in the late 60's was use a 6 link wide 60 pitch chain to wrap around two 3 link wide sprockets. One I atttached to the front hub of the rear engine and the other was bolted to a flex plate on the front engine, The hubs were about 8" in diameter. It was used to bolt 2 283's together for a dragster. It worked, but I'm not sure if it would pass tech now.
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