redscamp
|
| posted on 16/7/17 at 01:52 AM |
|
|
running an engine without manifolds
Pointless maybe, but its something ive wanted to try for a while.
Interesting most of the start up/cold running smoke comes from cylinder 3.
look mum, no manifolds
|
|
|
|
|
LBMEFM
|
| posted on 16/7/17 at 06:02 AM |
|
|
I like it, I would suggest that number three smoke is oil smoke probably from a worn bore, broken piston ring or worn valve stems/seal.
|
|
|
craigdiver
|
| posted on 16/7/17 at 06:16 AM |
|
|
I like that, you can actually see the pulses of cylinders firing at lower RPM
If it ain't broken, fix it anyway (just because).
Building - BMW powered Haynes Roadster/442E hybrid.
Volvo C30 T5 Polestar
|
|
|
Angel Acevedo
|
| posted on 17/7/17 at 04:45 PM |
|
|
Loong time ago I heard that running without manifolds may bend valve stems upon shut-off due to uneven cooling.
I think that was the reason Big V12 engines in planes had short exhaust stubs.
I may be wrong (Or the guy that told me so)
Beware of what you wish.. for it may come true....
|
|
|
motorcycle_mayhem
|
| posted on 17/7/17 at 05:14 PM |
|
|
Difficult to tell from the video, but the smoke looks white on my CRT screen device. From experience with old LR engines (the 2286 that powered the
Ark) and dodgy injector pumps/timing/pre-combustion chamber dropouts/clogged injectors/etc. etc., it looks to me like diesel fuel smoke, it
isn't burning whatever is available to it at low rpm.
|
|
|
MikeRJ
|
| posted on 17/7/17 at 09:13 PM |
|
|
It'll almost certainly be a tired injector.
|
|
|
nick205
|
| posted on 18/7/17 at 10:14 AM |
|
|
Nice!
One of those activities others may ask - why?
I say - why not?
|
|
|
Mr Whippy
|
| posted on 18/7/17 at 11:18 AM |
|
|
quote:
Originally posted by Angel Acevedo
Loong time ago I heard that running without manifolds may bend valve stems upon shut-off due to uneven cooling.
I think that was the reason Big V12 engines in planes had short exhaust stubs.
I may be wrong (Or the guy that told me so)
I think that would be more the engine was narrower than the plane and more to avoid gassing ones self or setting the plane on fire  other reasons
I've heard are directing exhaust for more thrust hmmm..., hiding the flames during night flights hmmmmm.... and giving some back pressure to
help scavenging (the most likely)
I have ran various 4 and 6 cylinders with no manifolds and the noise is spectacular
|
|
|
Angel Acevedo
|
| posted on 18/7/17 at 02:55 PM |
|
|
quote:
Originally posted by Mr Whippy
quote:
Originally posted by Angel Acevedo
Loong time ago I heard that running without manifolds may bend valve stems upon shut-off due to uneven cooling.
I think that was the reason Big V12 engines in planes had short exhaust stubs.
I may be wrong (Or the guy that told me so)
I think that would be more the engine was narrower than the plane and more to avoid gassing ones self or setting the plane on fire other reasons
I've heard are directing exhaust for more thrust hmmm..., hiding the flames during night flights hmmmmm.... and giving some back pressure to
help scavenging (the most likely)
I have ran various 4 and 6 cylinders with no manifolds and the noise is spectacular
Ha!
You are very right...
My english composing skills are rubbish...
I think my statement should have been...
Loong time ago I heard that running without manifolds may bend valve stems upon shut-off due to uneven cooling.
I may be wrong (Or the guy that told me so)
And...
I think that was the reason Big V12 engines in planes had short exhaust stubs. (which is a very unaccurate assumption also)
I would like to hear a BMW Inline six without manifolds...
Beware of what you wish.. for it may come true....
|
|
|
