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> New Type lV Build, Done Quick & Cheap
Chris Hamilton
post Jul 24 2009, 05:31 PM
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QUOTE(kwales @ Jul 24 2009, 04:05 PM) *


Hmmm.... that may help explain why there are no 30 year old Honduh engines left- low mass flywheels, marginally sized bearing and wear surfaces resulting in high wear and high shock loads to the system... (IMG:style_emoticons/default/idea.gif)

Sorry Jake, it's the engineer nerd in me....


You must be referring to an old series of Hondas that I'm not familiar with. the D-series and B-series honda engines I've seen have been very reliable, and have pretty damn heavy flywheels.
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r_towle
post Jul 24 2009, 09:27 PM
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Who cares....

Show more pics of the motor build....

Rich
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ChrisFoley
post Jul 25 2009, 05:08 AM
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QUOTE(Todd Enlund @ Jul 23 2009, 10:50 PM) *

I know of a guy that put a huge flywheel under his Pinto. He'd spool it up, shut the engine off, and drive home on the flywheel. Regenerative braking put energy back into the flywheel.

(IMG:style_emoticons/default/bs.gif)
Do you have any idea how much mass would be required to actually accomplish that? The only way to put energy back into the flywheel is to increase its rotational velocity. A rather complex system would be required to transfer braking energy to the flywheel.
An engineer friend told me that BMW was trying to develop a flywheel system and killed someone during testing. They didn't have the test cell adequately built to protect people from a runaway flywheel, and something went wrong. If it was a good, safe idea and not too complex it would have already been implemented by a car mfr.
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Type 4 Unleashed
post Jul 29 2009, 01:52 AM
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Type 4 Unleashed
post Jul 31 2009, 02:42 PM
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Chris Hamilton
post Jul 31 2009, 02:43 PM
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Who manufactures those 103s?
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Type 4 Unleashed
post Jul 31 2009, 02:52 PM
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Todd Enlund
post Jul 31 2009, 03:20 PM
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QUOTE(Racer Chris @ Jul 25 2009, 03:08 AM) *

QUOTE(Todd Enlund @ Jul 23 2009, 10:50 PM) *

I know of a guy that put a huge flywheel under his Pinto. He'd spool it up, shut the engine off, and drive home on the flywheel. Regenerative braking put energy back into the flywheel.

(IMG:style_emoticons/default/bs.gif)
Do you have any idea how much mass would be required to actually accomplish that? The only way to put energy back into the flywheel is to increase its rotational velocity. A rather complex system would be required to transfer braking energy to the flywheel.

May be BS, but I came across it while I was doing research on alternative power in 1982. I have always been skeptical of the regenerative braking claim... as I recall, it was in an issue of Pop Science or some such. Braking energy could be fed back into the flywheel via an electrical motor... not terribly complex. The most complex part of the claim would be converting braking energy into electrical energy. It was a test mule built by a college professor.

The article also did not say how far his drive home was... I assume it could be measured in blocks.
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Todd Enlund
post Jul 31 2009, 03:23 PM
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QUOTE(Type 4 Unleashed @ Jul 31 2009, 12:42 PM) *

I found out something interesting today, initial test results, are showing that these cyl's, particularly the 103mm cyl is Superior to the factory VW cyl's.

Superior in what way? What type of testing?
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r_towle
post Jul 31 2009, 04:15 PM
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QUOTE(Todd Enlund @ Jul 31 2009, 05:20 PM) *

QUOTE(Racer Chris @ Jul 25 2009, 03:08 AM) *

QUOTE(Todd Enlund @ Jul 23 2009, 10:50 PM) *

I know of a guy that put a huge flywheel under his Pinto. He'd spool it up, shut the engine off, and drive home on the flywheel. Regenerative braking put energy back into the flywheel.

(IMG:style_emoticons/default/bs.gif)
Do you have any idea how much mass would be required to actually accomplish that? The only way to put energy back into the flywheel is to increase its rotational velocity. A rather complex system would be required to transfer braking energy to the flywheel.

May be BS, but I came across it while I was doing research on alternative power in 1982. I have always been skeptical of the regenerative braking claim... as I recall, it was in an issue of Pop Science or some such. Braking energy could be fed back into the flywheel via an electrical motor... not terribly complex. The most complex part of the claim would be converting braking energy into electrical energy. It was a test mule built by a college professor.

The article also did not say how far his drive home was... I assume it could be measured in blocks.


Easy peasy...
Use an elec generator as the drive system on the wheel...like Porsche did.
Its a very simple way to brake.....
Very proven old technology.

Rich
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Type 4 Unleashed
post Jul 31 2009, 09:24 PM
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r_towle
post Jul 31 2009, 10:42 PM
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looking good.

Can you come up with a safe crank for rabbit rods....one that wont break?

Rich
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Type 4 Unleashed
post Aug 1 2009, 12:54 AM
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Chris Hamilton
post Aug 3 2009, 01:45 PM
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QUOTE(r_towle @ Jul 31 2009, 09:42 PM) *

looking good.

Can you come up with a safe crank for rabbit rods....one that wont break?

Rich



You can grind a 2.0 crank to rabbit rods if you want a stock stroke. That's what I have in my car, as do at least a dozen other 914s in this area.

There is nothing wrong with the journal size on it's own, the diesel rabbits used that journal, and I can't imagine anything that would put more load on it than a diesel.

The tricky area comes when you take a crank designed for a larger journal and take it down to a smaller size. Thats where knowing what you're doing becomes the important part.
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maf914
post Aug 3 2009, 01:54 PM
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QUOTE(Racer Chris @ Jul 25 2009, 03:08 AM) *

QUOTE(Todd Enlund @ Jul 23 2009, 10:50 PM) *

I know of a guy that put a huge flywheel under his Pinto. He'd spool it up, shut the engine off, and drive home on the flywheel. Regenerative braking put energy back into the flywheel.

(IMG:style_emoticons/default/bs.gif)
Do you have any idea how much mass would be required to actually accomplish that? The only way to put energy back into the flywheel is to increase its rotational velocity. A rather complex system would be required to transfer braking energy to the flywheel.
An engineer friend told me that BMW was trying to develop a flywheel system and killed someone during testing. They didn't have the test cell adequately built to protect people from a runaway flywheel, and something went wrong. If it was a good, safe idea and not too complex it would have already been implemented by a car mfr.


The Williams F1 team announced last year that they were developing a flywheel based KERS system (kenetic energy recovery system) for this season. It has not yet been used in a race and probably won't be. Williams have not said much about their system. All of the teams that have used KERS this year have used generator/motor and battery systems.
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