Old Sckool 5 cc model Diesel engine build
Moderator: Bootsy
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- Nurse, I think I need some assistance
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Re: Old Sckool 5 cc model Diesel engine build
Looks great Graham
The simple things you see are all complicated
I look pretty young but I'm just backdated yeah
I look pretty young but I'm just backdated yeah
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- Nurse, I think I need some assistance
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Re: Old Sckool 5 cc model Diesel engine build
Thank you Mark.
I see that the 'attendance' to this long thread is tailing off sharply so many getting bored!
Gaskets cut out of brown paper just and i think all the machining is behind me.
Been a slog at times, and great at other times!
Typical stuff really when pushing yourself a bit.
I see that the 'attendance' to this long thread is tailing off sharply so many getting bored!
Gaskets cut out of brown paper just and i think all the machining is behind me.
Been a slog at times, and great at other times!
Typical stuff really when pushing yourself a bit.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Re: Old Sckool 5 cc model Diesel engine build
It’s been an education to follow along… & has convinced me that I shouldn’t buy a lathe
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- Nurse, I think I need some assistance
- Posts: 18955
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: Old Sckool 5 cc model Diesel engine build
Or at lest not one 100 years old!
It would have been much easier with a modern lathe and a modern milling machine...
And someone who had the right skill-set of course.
It would have been much easier with a modern lathe and a modern milling machine...
And someone who had the right skill-set of course.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
-
- Nurse, I think I need some assistance
- Posts: 18955
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: Old Sckool 5 cc model Diesel engine build
This will make a nice paperweight!
It will NOT start no matter what I do or try.
Do not feel inclined to keep on trying as I feel there simply is not enough compression to get to the ideal mixture.
In the meantime I've bought another design to make on the Drummond. It is a 1933 design spark ignition, 6.3cc and more complex to machine.
Tinkering is better than using.
The audience has all but dissipated now, so thanks for following the adventure.
I won't do a thread on the next engine.
It will NOT start no matter what I do or try.
Do not feel inclined to keep on trying as I feel there simply is not enough compression to get to the ideal mixture.
In the meantime I've bought another design to make on the Drummond. It is a 1933 design spark ignition, 6.3cc and more complex to machine.
Tinkering is better than using.
The audience has all but dissipated now, so thanks for following the adventure.
I won't do a thread on the next engine.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
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- Nurse, I think I need some assistance
- Posts: 7772
- Joined: Mon Apr 16, 2012 4:31 pm
Re: Old Sckool 5 cc model Diesel engine build
Why do you suspect lack of compression? You to have gone from too tight to too loose?
PS congratulations to getting this far.
Sent from my 22011119UY using Tapatalk
PS congratulations to getting this far.
Sent from my 22011119UY using Tapatalk
“A REMINDER. I would be grateful if those members who have borrowed bits from me in emergencies (e.g starter motor, oil cooler, etc) would return them and/or contact me”. – Chris Turner RIP
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- Nurse, I think I need some assistance
- Posts: 18955
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: Old Sckool 5 cc model Diesel engine build
To get the right compression on these designs needs a near interference fit right close to TDC.
This means a clearance of about 1 or less thou, and this can be achieved only by honing or lapping the piston to size or the bore to the piston.
First you need a very 'dead-on' clearance and this is hard to do on this old lathe, and such fits have to be estimated or felt more than by taking a cut of a known depth.
I think the piston is far too loose in the bore for the entire stroke.
Thus, I will have to make a new piston, #4 if I'm counting.
I will make an electric starter this weekend and try that, but will probably just clean it, remove the prop and put it on a display stand.
This means a clearance of about 1 or less thou, and this can be achieved only by honing or lapping the piston to size or the bore to the piston.
First you need a very 'dead-on' clearance and this is hard to do on this old lathe, and such fits have to be estimated or felt more than by taking a cut of a known depth.
I think the piston is far too loose in the bore for the entire stroke.
Thus, I will have to make a new piston, #4 if I'm counting.
I will make an electric starter this weekend and try that, but will probably just clean it, remove the prop and put it on a display stand.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
-
- Nurse, I think I need some assistance
- Posts: 18955
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: Old Sckool 5 cc model Diesel engine build
Posted just now
I smell of ether...
I smell of blood sweat and tears...
This engine (if I dare call it that) will not start.
both wrists hurt from trying and the wood prop looks like firewood.
I have decided to leave it for a while or for ever (preferably) and let it sit on the shelf and remind me that this is a Bad Day.
Found a fancy brass engine stand, so this is the final picture:
I smell of ether...
I smell of blood sweat and tears...
This engine (if I dare call it that) will not start.
both wrists hurt from trying and the wood prop looks like firewood.
I have decided to leave it for a while or for ever (preferably) and let it sit on the shelf and remind me that this is a Bad Day.
Found a fancy brass engine stand, so this is the final picture:
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
-
- Nurse, I think I need some assistance
- Posts: 8771
- Joined: Sat Apr 23, 2005 9:08 pm
- Location: Nottingham, UK
Re: Old Sckool 5 cc model Diesel engine build
Never mind Graham. You might feel better about it when you’ve left it alone for a while.
The simple things you see are all complicated
I look pretty young but I'm just backdated yeah
I look pretty young but I'm just backdated yeah
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- I need to get out more!
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Re: Old Sckool 5 cc model Diesel engine build
Not all the audience is gone, just watching quietly. Shame it didn’t run, but that’s not unusual I think for these motors. I think the tolerances are pretty tight. Remember the photo of the tiny motor my dad made? I remember him telling me that that never ran either. I might try one day, but I’ve got no fuel… curious what fuel you got and where from ? I might try…
Tim Bennett
RHD Targa 2.2T EFI, Triumph ITB's, EDIS and Megasquirt.
"Old enough to know what's right and young enough not to choose it"
#1153
RHD Targa 2.2T EFI, Triumph ITB's, EDIS and Megasquirt.
"Old enough to know what's right and young enough not to choose it"
#1153
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- Nurse, I think I need some assistance
- Posts: 18955
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: Old Sckool 5 cc model Diesel engine build
I think the root problem is compression both primary (crank case) and cylinder.
The piston should be all but an interference fit at the TDC position.
I also need to check the piston top to the exhaust ports and the transfer port, but not feeling the LUV yet to strip it down and check.
More homework to do.
The right fuel is getting hard to get.
Found some on ebay which a few other shops sell too, v expensive at £26 per 1/2 litre!!
Made by a company trading as MT in a white can, 2 grades, 1000 and 2000.
As to the thread, not sure the counting system is working.
It shows 50K hits and was ticking over at 1000/day (!) which i can't believe, but recently down to 10's a day or less which I believe to be more like it.
The piston should be all but an interference fit at the TDC position.
I also need to check the piston top to the exhaust ports and the transfer port, but not feeling the LUV yet to strip it down and check.
More homework to do.
The right fuel is getting hard to get.
Found some on ebay which a few other shops sell too, v expensive at £26 per 1/2 litre!!
Made by a company trading as MT in a white can, 2 grades, 1000 and 2000.
As to the thread, not sure the counting system is working.
It shows 50K hits and was ticking over at 1000/day (!) which i can't believe, but recently down to 10's a day or less which I believe to be more like it.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
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- DDK 1st, 2nd and 3rd for me!
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Re: Old Sckool 5 cc model Diesel engine build
Speaking as somebody who owned a few flying toys as a kid, this is a lot of work for something that's going to get stuck in a tree.
Great work - keep moving forwards!
Great work - keep moving forwards!
1970 911T, Signal orange (Restoration thread)
1988 3.2 Carrera backdate, Black
2001 996 Turbo, Lapis blue (am I allowed to put that here?)
I'm looking for a pre-impact bumper 911S or other high-revving 911 to restore - please let me know if you see one.
1988 3.2 Carrera backdate, Black
2001 996 Turbo, Lapis blue (am I allowed to put that here?)
I'm looking for a pre-impact bumper 911S or other high-revving 911 to restore - please let me know if you see one.