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Author Topic: Typical HP of a Detroit V-6-92  (Read 3147 times)
Gary '79 5C
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« Reply #15 on: February 27, 2012, 12:54:26 AM »

Interesting.  The "fuel squeezer" had a governor that capped the HP at a certain amount - 270 hp - but the engine had the same injectors as the 335 hp version and produced the same HP up to the RPM where the restriction started.  If your engine is the "fuel squeezer", I'd be interested to figure out how to tamper with the "tamper resistant governor"

So, With a 6V92TA w/ 92 injectors, Could a poorman's fuel squeezer be keeping his foot out of it ??
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bevans6
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« Reply #16 on: February 27, 2012, 04:20:50 AM »

Gary, I honestly don't know.  Obviously not using full throttle is one way to save fuel, but the governor on our engines is not a direct link between foot and throttle plate the way it is on a carburettor.  The control is more of a speed control lever on top of the governor, and the governor springs and settings decide how much fuel to inject based on speed, load, accelerating, decelerating etc.  You can have full movement/full fuel  on the injectors but not have your foot all the way down - I think

The TT Fuel Squeezer backs off the full rack setting after a certain RPM has been exceeded.  It's variable, so it's almost like the injector size is being altered to cap the amount of fuel being injected to only that which will create a certain amount of HP.  This will have the effect of enticing the driver to drive at lower RPM's and shift earlier - the engine is unrestricted up to the RPM level, so it acts great, it just hits that wall at 1500 rpm so you may as well shift up and get back into the torque curve.

Brian
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Derrick Thomas
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« Reply #17 on: February 27, 2012, 07:51:16 AM »

Scott, and anyone else even thinking about messing with the "govnah"...one of the great tricks I picked up from working with Clifford the bus guru, aka "luvrbus" is this: if you mess with anything that has to do with the governor or fuel control rods, pull a valve cover and attach a set of vise grips to the fuel rod lever. This way you can control the fuel rods separately from the governor in case of a bad adjustment. good insurance I think.
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1977 MCI Crusader MC-8
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Geoff
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« Reply #18 on: February 27, 2012, 08:27:17 AM »

I haven't set a "TT Fuel Squeezer" with the Belleville spring washers since I worked for Detroit Diesel 30 years ago, but as I recall you set the engine to a lower top rpm using the washer assembly.  The way it worked was that as the engine was climbing a hill, the Belleville washers would compress and allow the governor more travel (fuel) so that you would slowly get up to full rack rather than getting it right away as you would driving with the regular governor high speed spring.  The truck drivers hated the TT engines so we would just adjust the no-load rpm to 2300 using the big nut which would leave the Belleville washers sitting all alone on the adjustment threads without messing with them or removing them.

Also, I don't don't know what the Greyhound engines were set at horsepowerwise, but the charter buses of that era were all set at 335 HP with G85 injectors.

--Geoff
General Diesel Service
Prescott, AZ
« Last Edit: February 27, 2012, 08:38:12 AM by Geoff » Logged

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Scott Bennett
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« Reply #19 on: February 27, 2012, 11:51:37 AM »

Scott, and anyone else even thinking about messing with the "govnah"...one of the great tricks I picked up from working with Clifford the bus guru, aka "luvrbus" is this: if you mess with anything that has to do with the governor or fuel control rods, pull a valve cover and attach a set of vise grips to the fuel rod lever. This way you can control the fuel rods separately from the governor in case of a bad adjustment. good insurance I think.

Thanks for the tip on that. I am no sure I'll tackle this immediately...I have visions of a runaway in my head and I can't get a clipboard over the intake fast enough  Undecided
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Scott & Heather
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« Reply #20 on: February 27, 2012, 01:57:55 PM »


Thanks for the tip on that. I am no sure I'll tackle this immediately...I have visions of a runaway in my head and I can't get a clipboard over the intake fast enough  Undecided

Detroits don't "run away", they overspeed. Running away is what most people would do as the DD begins to overspeed...while the well seasoned DD mechanic calmly reaches in and blocks off the air intake. Grin Grin Grin
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There are three kinds of people in this world....those that make things happen, those that watch things happen, and those that just wonder what the heck is happening. Which one are you?

1977 MCI Crusader MC-8
8V71N/740
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Scott Bennett
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« Reply #21 on: February 27, 2012, 03:30:52 PM »

got it.  overspeed...ahha..and i must say that i was tempted the other day to "run away" when i was working on the engine stop lever and i had the return spring for the throttle removed, and i pulled the throttle lever and of course it stayed there...at full throttle. no exhaust...coming right out of the manifold... Shocked two strokes are loud beasts...wow...hurt my ears even with full cover sound muffs on! but instead of running away, i calmly...ok that's a lie...i nervously reached into the belly of the beast and manually pushed the throttle lever back into idle position. and the roar calmed to a rumble...which was still loud. So, I'm not quite yet feeling the desire to adjust my horsepower by messing with the fuel squeezer...not just yet.
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Scott & Heather
1984 MCI9 6V92-turbo with 9 inch roof raise & conversion in progress.
http://www.scottmichaelbennett.com/p/our-bus.html
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NoRivets
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« Reply #22 on: February 28, 2012, 04:28:46 AM »

It's possible for a DD to "run away" or "overspeed" if there becomes an 'adequate' alternate source of fuel - such as a blower seal leak  Smiley . Taking the 'air' out of the equation is still the answer .
« Last Edit: February 28, 2012, 04:32:38 AM by NoRivets » Logged

AZ
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eagle19952
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« Reply #23 on: February 28, 2012, 10:14:42 AM »

http://www.powerlinecomponents.com/literature/detroit_diesel/brochures/6v92ta-tta_automotive.pdf
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Donald PH
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Scott Bennett
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« Reply #24 on: February 28, 2012, 11:29:55 AM »



Instant replay! Brian posted that link on page one of this thread  Wink
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Scott & Heather
1984 MCI9 6V92-turbo with 9 inch roof raise & conversion in progress.
http://www.scottmichaelbennett.com/p/our-bus.html
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Van
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« Reply #25 on: February 28, 2012, 12:58:07 PM »

 Grin
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bevans6
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« Reply #26 on: February 28, 2012, 01:22:17 PM »

Maybe I just discovered who is ignoring me!   Grin Grin Grin

Brian
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Van
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« Reply #27 on: February 28, 2012, 03:46:00 PM »

 Grin Wink
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eagle19952
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« Reply #28 on: February 28, 2012, 09:08:58 PM »

Maybe I just discovered who is ignoring me!   Grin Grin Grin

Brian

Ah no...I don't play that way.
But I don't clic on every link,I just read and seek.
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Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 NA, DDAllison on 24.5's 12kw Kubota.
Wants Paint Smiley
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