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03-25-2010, 05:54

Ok.. "red block" vs "silver block" 6V92's. The red block is the older version of 6v92's. The silver version came out to fix some issues the red version had. The big one that I'm aware of was cooling jackets inside the engine. The older versions of the 6v92 were MUCH easier to get more power from. You can easily change out a few mechanical items and boost HP from stock 188 to 350.

However, if you have an engine around '80-81 and newer you'll have the DDEC system and these are much more difficult to deal with. The issue with these is that you'll have trouble finding someone to reprogram the DDEC. When I tried here locally (Phx) no one would do it for fear of Governmental Environmental Agencies. Apparently they de-tuned them for less pollution as the 2-strokes are really bad.

People will argue that increasing the HP from 188 to 350 will drastically decrease engine life. Well I'm sure it will reduce the life but we're only putting "casual" miles on these commercial units so you'll get many years from it even when boosting up the HP. I have ridden in an RTS City bus that was converted and bumped from 188 to 350. Even with its 3sp auto transmission it was like night & day!

Michael

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