Forum Discussion
Madhatter1
Aug 16, 2012Explorer
Not ISB's. 1998 12 valve. WOT reached rated RPM on the 454's as it did on original 440 Chryslers also raed at 330 HP. And for honest ratings they are really only 260HP, Still can't figure out why the marketing guys call them 270's. Also the tanks are in the rear and it runs the same speeds full or light (down 150 gallons which equals about 1000 lbs). The GM's were new 330 HP Mercruisers. Here is a little bit I will give away on Diesels in general. I chose the Cummins since at rated HP they are only at 2600 RPM. The other choice was 315 HP Yanmars that runs at 3400 RPM. The shop that installed my engines has the numbers on the exact same boat as mine with the Yanmars show that it takes longer to plane off and only beats my top end by 1 MPH. You can bring up all the speculation you want but a diesel that makes its power down low pulls a heavy load better than high RPM (gas or Diesel)engines. Damn, the zipper on this suit is stuck and it's starting to get hot in here. OTR truckers with 400 HP engines that can pull 80K help me out here.
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