[T2] [VB] Hot engine

[david raistrick]

just to get it all into one place:

this is the split bus?
rear tire size?
trans final drive? big or small nut or no redux?
measured RPM at ~~65 or some other speed?

engine details?
bore/stroke/CR/valves/cam/heads
exhaust/ignition/injection
oil pump size

cooling?
doghouse/nondoghouse?
external oil cooler plumbed in where?
hot oil pressure (measured at the OP sender port is fine) at highway speed?
(tells us what the relief valves are doing which directly relates to
cooling)
complete tinwork with rubber seal and hoover bits?
thermostat vanes in shroud or not?
crank pulley diam, gen/alt pulley diam? (even "stock" means various things)


I think that's the nutshell.....I know you've covered most of this before,
but putting it all in one place might help.







On Sat, Dec 7, 2019 at 10:09 PM Chris Dreike <cdreike at gmail.com> wrote:

> Thanks David.
> Today I installed the water injection and took my bus on a freeway ride.
> (wow, empty freeways in Los Angeles today!!) Was able to take a cruise at
> 65-70 for about 10 miles down the 405 and back again. Being a cool day at
> about 63F I only saw 350F max on #3. I turned on the water injection and
> there was no discernible change in either temperature or power. Water was
> flowing at about .5 quart per hour. Maybe it needs a little more. Robert
> Mann suggested a flow rate of 1 part water to 20 of gas which would put the
> flow rate closer to .6 quarts per hour. Next time out i'll head North
> instead of South so I can climb the Santa Monica Mountain hill. It's close
> to 4 miles continuous uphill. Otherwise I may need to wait until next
> summer to get a good read on this.In the mean time I'll just drive it and
> slow down when the temp gets too high.
> One more thing, I have a porsche pulley on the alternator for extra air
> flow. Its been there all along.
>  As for the oil temp, its now running at about 210F. Previously, before
> Installing an extra cooler, it was running at 260 on the highway. Its
> amazing that the oil no longer turns opaque black and only turns a
> transparent brown.
>
> Cheers,
> Chris
>
> On Sat, Dec 7, 2019 at 5:53 PM david raistrick <keen at icantclick.org>
> wrote:
>
> > 9-10:1 should not run crazy hot unless there are other things at play.
> > a/f, oil pressure (pressure and the relief valves play a massively
> > important combined roll in cooling and upright), ignition and valve
> > timing....   hell spark plugs can come into play.
> >
> > still sounds like there is something else hinky going on
> >
> >
> >
> >
> >
> > --
> > Sent from my random mobile device of the week
> >
> > > On Dec 6, 2019, at 11:46 PM, Chris Dreike <cdreike at gmail.com> wrote:
> > >
> > > Wow,
> > > Thanks for all the great replies. First I have fuel injection on this
> > > engine. A MegaSquirt controller. Stock VW mexi-bug throttle body intake
> > and
> > > port injection.
> > > I once tried the passive water injection per Robert Mann. Didn't work
> so
> > > well. Even with the smallest needle (.025" o.d.) water was flowing at
> > about
> > > a gallon plus per hour. It ruined my O2 sensor, expensive.
> > > There is still the possibility that there is something else wrong. Just
> > not
> > > sure what else it could be. I've tried all sorts of air/fuel ratios and
> > > spark advance to no avail.
> > > Like I said, if this new set up doesn't work, I'll try reducing the
> > > compression. This set up should supply about a half liter per hour.
> > Should
> > > be OK on the highway.
> > > BTY I have the sensors on #1 and #3. #3 is about 20 degrees hotter than
> > #1
> > > pushing it up to 400F or beyond if I let it at 65mph on the highway.
> > >
> > > Chris
> > >
> > >> On Fri, Dec 6, 2019 at 7:56 PM Richard Jack <jackvw at icloud.com>
> wrote:
> > >>
> > >> Chris,
> > >>
> > >> Hello I’ve been a lust member for longer than I can remember.  I try
> to
> > >> post regularly, but I don’t think it ever works any longer.  Do you
> know
> > >> any of the admins that I could reach out to to fix that issue?
> > >>
> > >> Any help, greatly appreciated!
> > >>
> > >> Richard Jack
> > >> Lubbock, Texas
> > >>
> > >>> On Dec 6, 2019, at 8:59 PM, Chris Dreike <cdreike at gmail.com> wrote:
> > >>>
> > >>> Hi Volks,
> > >>> More on my overheating heads. I recently checked the compression on
> all
> > >> 4.
> > >>> I found 150, 155, 155, 160. Seems that this equates to a compression
> > >> ratio
> > >>> of about 9.5:1 to 10:1. I think I found the problem. Too much
> > >> compression.
> > >>> I am preparing to set up a water injection system. I have a
> replacement
> > >>> windscreen washer bottle with pump as well as requisite hoses,
> metering
> > >>> valve and an injection needle. I have .028" hole drilled into the
> > >> throttle
> > >>> body near the top. I'll stick in the needle and initially use a
> manual
> > >>> switch in the cab to turn it on. Later on I can use an output on the
> > fuel
> > >>> injection control to do this automagically. This may cool things off.
> > The
> > >>> alternative is pulling the motor to install some copper rings between
> > the
> > >>> heads and the cylinders.
> > >>>
> > >>> Cheers,
> > >>> Chris
> > >>> 64 DD Kamper Kit
> > >>> 71 Sunroof
> > >>> _______________________________________________
> > >>> type2 mailing list
> > >>> type2 at type2.com
> > >>> https://www.type2.com/lists/type2/listinfo
> > >>
> > >>
> > > _______________________________________________
> > > vintagebus mailing list
> > > vintagebus at type2.com
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> >
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