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Re: crown bus engine upgrade? by Phil Feinstein
Post New Message If you take a look at http://www.angelfire.com/biz/snwvlly/busses/repwr.htm, you'll see the replacement of a 4-71 Detroit Deisel with a 391 Ford V8.

There's no doubt in my mind that it can be done and that you'll get more power and efficiancy with a newer style of deisel motor. There are a few considerations.

* What is the absolute size of the engine bay?
* What is the length/width/height of the engine that you want to swap in?
* Does the transmission attach in a manner you can live with?

Obviously, if the motor is bigger than the engine bay you can't use it. As a rule of thumb, you shouldn't use an engine that exceeds 90% of any dimension in the engine bay just for ease of service. If you look at the 4-71 to 391 conversion, you'll see that he had to craft motor mounts and lucked out because he had a heavy duty trans that could be grafted to the transaxle via a driveshaft. The roadrunner was a pretty common tranny at one time, so you may find that it will bolt up to a newre engine or that a bellhousing is available to connect to the newer engine.

DO YOUR RESEARCH. Nothing kills a project like depending on a part that doesn't exist.

Hope that helps!
All Messages in ThreadAuthorDate
Post New MessageCrown bus engine upgrade? Bovis 9-5-06  
  Reply to MessageRe: crown bus engine upgrade? Phil Feinstein 9-6-06  
  Reply to MessageRe: crown bus engine upgrade? Mark Wolfe 11-9-06  
  Reply to MessageRe: crown bus engine upgrade? Jackie 11-29-06  
  Reply to MessageRe: crown bus engine upgrade? Aaron 2-17-07  
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