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Author Topic: extending MCI5  (Read 2940 times)
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« Reply #15 on: March 03, 2008, 08:50:43 PM »

Roof raises are cool.  Extending, as Jerry suggests, is another issue.   The rear of an MC5 engine cradle is supported not by the lower frame, but by the upper steel frame that forms a 'bridgework' over the rear of the bus.     
Support of the rear of the cradle is dependent on the upper steel being up to the job.  The rear of the engine and cradle 'hangs' on the roof stringers of the coach.   
Another issue, although not as critical, is overhang of the rear bumper.   You may find yourself dragging on the darndest things...especially with a hitch beneath the bumper.   Clearly an extension could be safely done...the question is, is it worth the effort?  You can buy an MC7-9 shell for about near nothing these days...they have enough room in the engine compartment for most 6 cylinder 12 ltr or less 4 strokes Cummins or Cats (the exception being an S60).  An S50 will fit the engine room without floor mods.  An S60 will fit if one builds a 'doghouse' in the rear of the bus.  Only takes a couple of inches in height.
If you like the '5, a good 2 stroke will make your life soo much easier. 
Drop in a 350 HP 6V92TA in place of the 8V71.  You'll find it quite suitable.  So would turboing your 8V71.  That would make a huge difference. 
One other point, if you are not a fabricator, this is going to get really expensive.  And the chance of recovering your investment is slim to zero. 
Just some thoughts....JR


JR Lynch , Charlotte, NC
87 MC9, 6V92TA DDEC, HT748R ATEC

"Every government interference in the economy consists of giving an unearned benefit, extorted by force, to some men at the expense of others.

Ayn Rand
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2000 Country Coach Magna (not a bus)

« Reply #16 on: March 04, 2008, 07:00:27 PM »

I sent you four or five pictures to your email address listed here.

Fred Thomson
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