Re: R&D AMC six head numbers

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: farna@xxxxxxx
" 
" Funny!! LOL
" 
" The only time I saw 6-71 though, was referring to a Rootes type
" blower. 6-71 means it was designed for a six cylinder engine and has
" a 71 cuibic inch displacement (the blower, not the engine!). 

nope, that would be referring to the engine it was designed for.  once
upon a time the 6-71 was a popular engine for gmc trucks.  '6-71'
means six cylinders [in line], 71 cubes per cylinder.  note there was
also a 6v-71.

dd had several series like that; 53, 71, 92, 110, 149...  2 to 12 [at
least] cylinders, inlines and vees.  all had rootes blowers to
scavenge the cylinders as they didn't use crankcase induction like
spark two-strokes.  some also had turbos; i don't know if any of those
dropped the blowers.

they're not well loved by truckers; they tend to have rather peaky
torque curves, necessitating lots of shifting in any kind of non-flat
terrain.  they're also very heavy [by modern standards at least] for
their output.  the 3-53 once offered in 1-ton vans weighed over 1000
lbs and had 108hp@2800rpm.  a modern diesel like the mercedes om613
has twice the hp and half the weight - and it's a 4-stroke.

" On July 15, 2005 andrew hay wrote:
" 
" > obviously, if it says 6-71 it must be a reworked detroit diesel
" > head...
" > ________________________________________________________________________

btw the pic looks like 6-11 to me.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen

adh@xxxxxxxxxxxxxxxxx                       and think what none thought