[MV] LDT-465-1D tuning

List

I dropped my M35 off at a diesel shop today to have
the heads retorqued, compensator bypassed, and the
pump turned up. The engine is strong running, low
hour 1D multifuel. The mechanic/shop owner has worked
on countless multifuels used mostly in stationary use
such as water pumps, irrigation pumps, etc. He seems
to know what he is talking about but I would like the
list's opinion. I told him to turn the pump up to
gain 20-30 horsepower and that didn't seem to be a
problem. The question is, is there a ballpark figure
of what kind of torque to expect? He also said the
more fuel we give it, the more boost the turbo will
provide. Is 15 lbs. possible? I asked about cooling
issues, pyrometers, boost gauges, etc. and they were
deemed unnecessary. Does bypassing the compensator
actually help that much? I'm not looking for a lot of
power, just enough to maybe pull fourth gear in the
steeper grades out west. Any thoughts or advice is
welcome.

Thanks

Marc




--- tom-fastest_m-35 <milveh@carr.org> wrote:[color=blue]
> i am not sure i would call it interesting, more like
> scary....... it
> depends on what you call 'play', these engines have
> mechanical lifters
> and require clearance for the valves to seat
> properly. .015" on the
> intake and .025" on the exhaust when the engine is
> hot, this is from
> memory but i think it is on the data plate of the
> engine.
> lunatic tom
>
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> [/color]




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Would be nice to see all replies to this on list please.....

Mike

-----Original Message-----
From: Marc Strangfeld [mailto:curlyjoe98@yahoo.com]
Sent: Tuesday, July 20, 2004 4:12 PM
To: Military Vehicles Mailing List
Subject: [MV] LDT-465-1D tuning

List

I dropped my M35 off at a diesel shop today to have
the heads retorqued, compensator bypassed, and the
pump turned up. The engine is strong running, low
hour 1D multifuel. The mechanic/shop owner has worked
on countless multifuels used mostly in stationary use
such as water pumps, irrigation pumps, etc. He seems
to know what he is talking about but I would like the
list's opinion. I told him to turn the pump up to
gain 20-30 horsepower and that didn't seem to be a
problem. The question is, is there a ballpark figure
of what kind of torque to expect? He also said the
more fuel we give it, the more boost the turbo will
provide. Is 15 lbs. possible? I asked about cooling
issues, pyrometers, boost gauges, etc. and they were
deemed unnecessary. Does bypassing the compensator
actually help that much? I'm not looking for a lot of
power, just enough to maybe pull fourth gear in the
steeper grades out west. Any thoughts or advice is
welcome.

Thanks

Marc




--- tom-fastest_m-35 <milveh@carr.org> wrote:[color=blue]
> i am not sure i would call it interesting, more like
> scary....... it
> depends on what you call 'play', these engines have
> mechanical lifters
> and require clearance for the valves to seat
> properly. .015" on the
> intake and .025" on the exhaust when the engine is
> hot, this is from
> memory but i think it is on the data plate of the
> engine.
> lunatic tom
>
> ===Mil-Veh is a member-supported mailing list===
> To unsubscribe, send e-mail to:
> <mil-veh-off@mil-veh.org>
> To switch to the DIGEST mode, send e-mail to
> <mil-veh-digest@mil-veh.org>
> To reach a human, contact <ack@mil-veh.org>
> [/color]




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At 1:11 PM -0700 7/20/04, Marc Strangfeld wrote:[color=blue]
>List
>
>I dropped my M35 off at a diesel shop today to have
>the heads retorqued, compensator bypassed, and the
>pump turned up. The engine is strong running, low
>hour 1D multifuel. The mechanic/shop owner has worked
>on countless multifuels used mostly in stationary use
>such as water pumps, irrigation pumps, etc. He seems
>to know what he is talking about but I would like the
>list's opinion. I told him to turn the pump up to
>gain 20-30 horsepower and that didn't seem to be a
>problem. The question is, is there a ballpark figure
>of what kind of torque to expect? He also said the
>more fuel we give it, the more boost the turbo will
>provide. Is 15 lbs. possible? I asked about cooling
>issues, pyrometers, boost gauges, etc. and they were
>deemed unnecessary. Does bypassing the compensator[/color]

I'd get a pyrometer added just to keep tabs on=20
the temperatures at the tricky bits.


--
--
Ryan Gill [email]rmgill@SPAMmindspring.com[/email]
----------------------------------------------------------
| | | -=3D=3D----
| O--=3D- | | /_8[*]=B0_\
|_/|o|_\_| | _________ | /_[=3D=3D=3D]_\
/ 00DA61 \ |/---------\| __/ \---
_w/|=3D_[__]_=3D \w_ // [_] o[]\\ _oO_\ /_O|_
|: O(4) =3D=3D O :| _Oo\=3D=3D=3D=3D=3D=3D=3D/_O_ |____\ /____|
|---\________/---| [__O_______W__] |x||_\ /_||x|
|s|\ /|s| |s|/BSV 575\|s| |x|-\| |/-|x|
|s|=3D\______/=3D|s| |s|=3D|_____|=3D|s| |x|--|_____|--|x|
|s| |s| |s| |s| |x| |x|
'60 Daimler Ferret '42 Daimler Dingo '42 Humber MkIV (1/3)
----------------------------------------------------------

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50 hp is easy with no cooling problems! That's about 185 hp. With the
fuel rate turned up, 15 lbs of boost is possible, but the turbo will
develop it at Max rpm which doesn't do ya much good. 15 lbs at 1500 r's
would be great but that ain't going to happen with the ole 1c or 1d free
spinner turbo. I can get about 9-12 lbs this range and my fuel is
cranked up about as far as one would want to go without causing a
meltdown. It will reach 15 lbs at 2700 rpm. You get up over this and a
intercooler is needed to cool the compressed air. About the max safe HP
is going to be around 190-210 hp and torque around 425 foot lbs or so.
With a turbo capable of 20 psi and a intercooler, 250-275 hp and 500 ft
lbs is attainable but the engine ain't going to like it for long
.....along with the tranny! JJA




On Tue, 20 Jul 2004 17:31:25 -0400 "Mike Maynard" <mike@wesleyscott.com>
writes:[color=blue]
> Would be nice to see all replies to this on list please.....
>
> Mike
>
> -----Original Message-----
> From: Marc Strangfeld [mailto:curlyjoe98@yahoo.com]
> Sent: Tuesday, July 20, 2004 4:12 PM
> To: Military Vehicles Mailing List
> Subject: [MV] LDT-465-1D tuning
>
> List
>
> I dropped my M35 off at a diesel shop today to have
> the heads retorqued, compensator bypassed, and the
> pump turned up. The engine is strong running, low
> hour 1D multifuel. The mechanic/shop owner has worked
> on countless multifuels used mostly in stationary use
> such as water pumps, irrigation pumps, etc. He seems
> to know what he is talking about but I would like the
> list's opinion. I told him to turn the pump up to
> gain 20-30 horsepower and that didn't seem to be a
> problem. The question is, is there a ballpark figure
> of what kind of torque to expect? He also said the
> more fuel we give it, the more boost the turbo will
> provide. Is 15 lbs. possible? I asked about cooling
> issues, pyrometers, boost gauges, etc. and they were
> deemed unnecessary. Does bypassing the compensator
> actually help that much? I'm not looking for a lot of
> power, just enough to maybe pull fourth gear in the
> steeper grades out west. Any thoughts or advice is
> welcome.
>
> Thanks
>
> Marc
>
>
>
>
> --- tom-fastest_m-35 <milveh@carr.org> wrote:[color=green]
> > i am not sure i would call it interesting, more like
> > scary....... it
> > depends on what you call 'play', these engines have
> > mechanical lifters
> > and require clearance for the valves to seat
> > properly. .015" on the
> > intake and .025" on the exhaust when the engine is
> > hot, this is from
> > memory but i think it is on the data plate of the
> > engine.
> > lunatic tom
> >
> > ===Mil-Veh is a member-supported mailing list===
> > To unsubscribe, send e-mail to:
> > <mil-veh-off@mil-veh.org>
> > To switch to the DIGEST mode, send e-mail to
> > <mil-veh-digest@mil-veh.org>
> > To reach a human, contact <ack@mil-veh.org>
> > [/color]
>
>
>
>
> __________________________________
> Do you Yahoo!?
> New and Improved Yahoo! Mail - Send 10MB messages!
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>
>
>
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>
> [/color]

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jeffery, you are right on the money. however the issue of the fuel
compensator is often misunderstood. there is a belief that bypassing it
will make the engine run better. well, yes it will make it have more
power, but this has nothing to do with the compensator not working
correctly in the first place. when the compensator is bypassed, it has
the same effect as turning up the fuel rate quite a bit. you are putting
the fuel slide in the max fuel position!! the problem with this is that
you have a 30+ year old engine that who knows who may have already
fiddled with the settings. so, if you already have a strong running
truck and you bypass it the fuel rate may be way up in the "melt the
pistons" range. any fuel work should begin with a pyrometer.
lunatic tom

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Hi Fellas ,
The temperature of the air going into the engine has a
marked effect on performance . On turbo units a fair amount of heat can be
picked up by the air which will reduce it`s ability to burn the fuel
properly . On hard worked engines it`s a vicious circle , more work , more
heat , lower performance . This cycle is broken best by a good intercooler !
Is the Multi fuel a true Diesel , or an interesting compromise ? A
detailed description of it`s operation or a reference as to where to read
about it would be appreciated .
Best wishes Noel



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even though the ld series multifuel engine has some special intake port
and piston chamber design, it is just a direct injection diesel. like
jeffery said, with a GOOD intercooler and a better turbo it should be
capable of 250 hp. while this won't make you go any faster, it would go
up hills much better.
t

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