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If the engine in your bus is a IHC 9.0L V-8, it never came from the factory in any application with a turbo. Most versions were sold in the 170-190 HP range.
At the time it was being sold it was being sold as a "money back" option over the big block gas engines--more expensive to purchase with the payback in less than 50K miles.
In terms of performance it wasn't that different from the SV345/392 and MV404-446 gas V-8 engines that were being sold at the time. The cost savings came in the form of twice the fuel mileage than could be expected from the gas engines. It was never intended to be a highway cruiser or hill climber.
If you wanted performance you checked the option box for the DT466 I-6 engine. In every application it came from the factory with a turbo.
You can tweak the fuel system to acheive a little more HP but the reality is the 9.0L was built and sold as replacement for a gas engine. It will never cruise at high speeds. It will never climb hills in anything except the slow lane. And if you try to do too much to it the life expectancy will be greatly shortened.
Mark O.
Castle Rock, WA |
RV and bus conversion info since 1996.
email Mark O.
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