WD45 LP

Curt Cooke · Mar 23, 2015

How did Allis get the compression up on their WD 45 LP gas model? Was it cylinder head or pistons, or a combination of the two? Also, was the tank always mounted in front of the operator or sometimes all the way out front? And who's carburetion did they use, Ensign, Century, Impco?

David R Inman · Mar 23, 2015

Seeing as how the AC part book only shows one head for all LP and Gas WD45's, the extra compression came from the cylinders alone.

To my understanding, all FACTORY LP WD45's where actually dual fuel-ran on LP out of the tank in front of the radiator, and Gas out of the normal tank between the operator and the motor. Thus, as I understand it, only conversions had the LP tank where the Gas tank was, between the operator and motor.

The Factory WD45 had an Ensign set up.

Hope this helps.

DrAllis · Mar 27, 2015

The cylinder head was flat with no combustion chamber in it. The pistons were the same between gas and LP gas, except for where the piston pin hole was machined. They put the hole about 1/4" farther down raising up the piston at TDC, thus increasing the compression from 6.5 to 1 on a gasser to around 7.25 to 1 on an LP gas.

WD45 LP

Curt Cooke

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David R Inman

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DrAllis

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