Re: Two cycle gasoline engines

Posted by buickanddeere on November 12, 2005 at 17:44:43 from (216.183.138.150):

In Reply to: Re: Two cycle gasoline engines posted by phillip d on November 12, 2005 at 16:58:32:

The Detroit Diesels were noted for good breathing which actually gave them flat torque curves.This however tends conflict with driver experience with four stroke diesels which are way past thier torque peak when cranked up to peak rpm.
Those four strokes just fall right on thier faces when reved past peak HP rpms. However when lugged the HP drops rapidly but torque increases giving the impression of more power.
The DD if reved faster made more HP with about the same torque. That's why if lugged enough to begin dropping rpms the two strokes had to be down shifted. No torque rise as airflow/volumetric efficiency improve dlittle as the two stroke's rpms drop.
As previously stated a gasser two stroke makes more HP per cubic inch than a four stroke but with a narrower torque and HP peak.
No matter if it's two stroke or four. If both engines are rated at 50HP at 3600 rpms then both can do the equal amount of work per hour.

Follow Ups:

• Re: Two cycle gasoline engines Frank Kovarick 21:45:07 11/15/05 (0)

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