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Topics - 32 coupe

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1
Listeroid Engines / Ashwamegh 25/2 : we are CLOSE now !
« on: November 25, 2018, 07:25:06 PM »
Today I had the opportunity to spend time with the beast.

Checked mufflers and intaked....no obstructions.....I did finally add
oil to the oil bath air cleaner. Remember those ?

Check injectors...looks like the correct numbers to
me ??

Adjust valves....I tried a few methods but wasn't happy...it started
and ran fine but I didn't think the intake had enough play so I did
the old slap and tickle at about 10k straight across.  Starts/runs
fine.
Check load for numbers.....yep, 4.2+ kw..... I am using space heaters and heat guns...checked each one and got the total.

Play with springs...The final spring wiil just hint at wanting to
hunt.....I can observe the slightest movent in the linkage but I
don't really hear a change in engine rpm.


But here are the numbers....

61.5 HZ no load
60.00 with the 4.3 kw load I run.

That is better than it's ever been....
man, I'm HAPPY with that !

I will need to do some more/better electrical work
before I try any heavier load testing.

I know everyone has been on the edge of your chairs with
anticipation, so I decided to spread the joy !

Gary



2
Listeroid Engines / Ashwamegh 25/2 :ever feel stupid ?
« on: August 11, 2018, 07:30:17 PM »
As some of you know I have had a problem with the engine pulling a load.
Anything over about 1kw and it would just fall flat.
After playing with about a dozen springs and sending the cam to Butch for
a rebuild with new weights and a new lobe I still could not get it to work.

When I got the "new" cam installed I, of course, set the valves but not the injection
timing. Today I set the timing (it was off a few degrees) and re adjusted the valves.
I saw a slight difference in exhaust temps so I did a fine adjustment on the linkage
and got the exhaust temps nearly perfect.

Off to pull a load.....no help......

I have often had the seals on the crank at the bearing housings squeel a little. I put a drop
of oil on them and that will stop. I believe it is because I run the crankcase vent to the intake
manifold instead of the "spring valve" the engine is shipped with.

Any way.....I noticed a very slight squeel while running. Ever so slight......
When running I watch my "kill a watt" and don't check rpms......

Today during testing I installed 1 of the 2 belts I run on this machine....

I thought I should install the other belt to see if the noise would go away......
Well, well, well......the slight noise did go away......
The engine will now pull a 5kw load with about a 1.2hz drop from no load to loaded.

I know the cam change was not a mistake because when I ran it before I always ran 2 belts.

So it looks like I am getting very close. After I got the belts on I took off the 3 springs I had on the
govenor and installed just 1. It is close but not as good as with the cobbled 3 springs in place
so it will take a little more work in that area.

I had to stop today because it is starting to rain and I run it outside but I know I am getting close !

Thanks for everyone's input. I couldn't ask for a more knowledgeable bunch of guys !!


3
Listeroid Engines / Ashwamegh 25/2 :the saga continues
« on: August 05, 2018, 05:24:52 PM »
I just can't get this thing to produce power.

I sent the cam to Butch who installed the new weights and see no change.

The engine will pull about 1600 watts but if I load it with another 1000 watts it just won't
do the deed.

With  no load I set the speed to 720 engine rpms. That will give me 1800 at the gen head.
I see 120 volts at 63 HZ. With a 1600 load it does 117 volts @60 HZ.
But another 1000 watts and the voltage will fall to 93 volts @ 54 HZ.

The engine is not "working" at this speed the governor just won't "pick up".

I tried several springs and spring combinations.

I am thinking a larger gen pulley to bring the engine rpms up to about 800 or so.

The engine has always run very close EGT's but I see a slight difference now. I guess this is do
to the new cam lobe on the #1 cylinder. I haven't reset the timing on that side yet but I don't believe
it is enough to cause the problem I am having.

I am open to ideas.

Gary


4
Listeroid Engines / 38ac please check your PM
« on: February 27, 2018, 09:34:59 PM »


I am trying to get in touch with you.

Thanks,
Gary


5
Listeroid Engines / Governor weights out... need more weight ?
« on: January 27, 2018, 08:15:54 PM »
Governor weights removed.

They weigh 9.7 ounces each.

Everyone has suggested a set with more weight.

Do I need more pics to get an idea of size ?

They are for  a 25/2 rated at 1000 rpms I am running at 720 rpms or so and will not
pull above 4kw.

When I took it apart I did not see any binding or rough spots. Still looks new inside with
normal "run in" on running surfaces.

The second cylinder injector lobe is well oiled. Looks like the "chamber" holds oil right up
to the drain hole. I usually oil the injector lifter before every run so I don't know if the oil is run off
from that or there is enough splash through the drain hole for oiling. Never.the less I.just wanted
to point out it seems to be well  lubed on this engine.

Check out that casting.. Must be made in Germany. Pre war.




6
Listeroid Engines / that spring thing again
« on: January 21, 2018, 08:06:24 PM »
OK, I have spent about 8 hours or so in the last 2 days on the beast with no success.


None of the linkages are binding, the rack is free with probibly 80% throw or better left at
730 rpm's.
The governor is free with no binding or excessive slop when I rotate the engine with
the spring off and moving the lever throughout its throw.

Warmed up , both cylinders will run within 5 degrees of each other.

I spent my time swapping springs trying to get the thing to pull 5kw.

Just won't do it.  At 730 rpm's and 1840 on the head  a 3kw load is no problem
The numbers are so close it's not worth mentioning.
BUT at 5kw load the engine is just starting to work a little the head will fall off to
52 hz from 62hz. Rpm's on the head will fall below 1600 at that point from 1840.
Don't remember the engine rpm's but you get the idea. Voltage will sag to 98 from the
120 it will normaly run.

I tried 12 or 15 different springs. Tried the original spring first. No luck.
Springs, combinations of springs, none stiffer than the original. No luck.
A few runs the springs were light enough the engine would just start to hunt a little.

I have noticed when I was setting throttle speed and no belt on the head the engine
would run with less vibration in the 800 to 850 rpm range. Maybe thats telling me
something.

The engine was rated at 25hp @ 1000 rpm's and I am running at 730 or so.

Not sure where to from here.

Gary




That little Kubota 4 cylinder engine is looking better all the time !



7
Listeroid Engines / that spring thing
« on: January 15, 2018, 11:28:47 PM »
My 25/2 running about 720 rpms runs out of steam at 5k load.

I believe the governor spring is too heavy.

The linkages are free and easy to swing from stop to full throttle. No binding.
I added a spring or two to take all the slop out. Time was not a factor so time
was extended for proper set up.

Injector timimg, pretty much the same deal. I spent hours setting and adjusting
timing on valves and injectors.

Starts well, runs good.

With that said I am convinced the govenor spring must be on the heavy side.

Near a 5k load the engine is working harder and the hz will drop from 60/61 to 57/58
on the gen head. 11kw "stamford"clone, so I don't think thats the problem.

The rpms are dropping about 45.    720 to about 675 give or take.

The exhaust temps are within 4 degrees of each other under load.

Cooling temp leaving the heads near 190/200 with return at 160 or so.

I would think the beast should easily pull 8 or 10kw before it starts to
load up.

I say softer spring.   

What y'all think ?


Gary




 

8
Generators / Stamford clone update
« on: January 01, 2018, 06:02:38 PM »
Today I drilled and slotted the generator slide.
Mounted and aligned the pulley.
Did a few test starts to check rpms and belt track.

Looks like she will be turning just over 700 rpms with the
belt/pulley set up I currently have.

After spinning that monster up 5 or 6 times I am worn out.

Stay tuned, I will get the power side up and running next week end.
I can, at that time, get some voltage and load test numbers.

Enjoy !

Gary



9
General Discussion / Doc says "It's Christmas !"
« on: December 25, 2017, 06:41:30 PM »

Have a great day !


10
Generators / think this will work ?
« on: December 24, 2017, 07:56:07 PM »

After the failure of the 7.5 kw ST head I purchased
this Stamford "clone".

Will post results in the next few weeks.

Stay tuned !
Gary


11
Listeroid Engines / ran the twin today !
« on: December 03, 2017, 08:34:54 PM »

Haven't run this unit for a number of years so I decided to run it for a couple of hours today.
Started right up and runs great. I only have a 7.5kw head on it now so I could only load it to
about 5kw.
Thermo siphon to a 30 gallon modified metal trash can.
This unit will get a 11kw "Stamford" clone in the near future.

Enjoy !

Gary



12
Generators / 7.5 st head update UPDATE
« on: November 11, 2017, 04:12:07 PM »
I received the 230 avr from Tom.... here are my new numbers :

no load
237 volts....118.7 each leg


10 amp load on both legs
238 volts
109.7 on 1 leg
135 on the other

10 amp load on 1 leg
124 on 1 leg
116 on the other

The growl is much worse with an unbalanced load.
If I wanted to use it for a dedicated 230 or 115 gen set it would
probibly be fine. To use it for a 230/115 load it looks to be too much
of a spread for anything with a "sensitive" load.

I plan to call Tom again on monday to see what he has to say.

This only reinforces my decision to purchase the "stamford clone" next.

Again, I will post results.

Thanks for your time,
Gary



13
Generators / 7.5 st head update
« on: November 05, 2017, 02:14:35 PM »
About a year later further testing on my 7.5 head reveals more problems.

It came with the 115 avr.  When I received it it had a bad imbalance growl so I tore it down,
found loose mounting problems on some of the coils. Repaired that as well as a good spray down
with the red varnish sealer.

More testing has shown that a 10 amp load on 1 leg (115 volt) it still has a pretty nasty growl.
The avr will run away on the unregulated leg. 90 and 170 or more.

Thinking I would remove the avr and rectify the problem. Wrong ! With the avr out the output is a
nice 325 volts !

I guess I will either look for a 220 to 110 transformer or order the 220 volt regulator.

Glad I ordered a 15kw and a 7.5 kw years ago when they were better quality. 

Sad.


14
Listeroid Engines / cooling question
« on: October 28, 2017, 06:23:42 PM »

My 6-1 runs with a Honda radiator, thermostaticly controlled fan and the orginal water pump
that I rebuilt with new bearings and seals. Works great with no problems.

My question is about the 25-2 that I have. I have run it with a 30 gal galvanised trash can that I put
fittings on to adapt hoses to. I has no water pump so it is thermo cooled. Works fine.

I would like to make it more compact and would like to add a Honda radiator with temp controlled
fan as on the 6-1.  I do have a t stat on the engine cooling manifold.

Do you guys think the coolant will thermo cycle with no water pump ?

Thanks for your time,
Gary




15
Changfa Engines / that Chinese coupler
« on: September 30, 2017, 11:30:52 PM »

When I acquired my changfa engine and st head a number of years ago, a direct drive coupler
was available

The said coupler has a series of o rings stacked on a set of pins that act as a bushing in a
matching drilled faceplate.

The original rubber o rings lasted for a time and needed replacement . I fabricated a set of
new ones from a 1/4" rubber sheet I had about and they lasted about 50 hrs or so.

I bought some delrin and am considering cutting some "bushings" from this material.

Any one else use this coupler and have any experience/input ?





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