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Lightweight Flywheels, NOT just for Race cars anymore.

I'm still/again working on getting a LW flywheel.

Current plan is to get TTV to generate a part number

with a dual Pressure plate mounting, that is a mix

of their #1910 as seen in post #8 above (top pic).

And their #2057 as seen in post #9 above.

I am thinking there are 3 different PP mounting holes/pins

patterns used in the series Alpines.

AND I'm still not sure what is the most common/readily available.

DW
 
spmdr said:
I am thinking there are 3 different PP mounting holes/pins patterns used in the series Alpines.
Click to expand...

This is a reply Jan S. made that was archived on the "Sunbeam Experience" board as part of a clutch identity discussion. Hope it helps.

The 8" sIV/MGB/(maybe some Volvos) diaphragm style MIGHT be the most available, but certainly not the most common Alpine fitment.

This read-only message was archived from a public mail list.
Mail From: Jan Servaites <(email redacted)>

Mike,
That information has a lot of errors in it for the Alpine. Here is the
truth on Alpine flywheels/clutches/splines/assembly pins/clutch release
arms/slaves:
Series I - Flywheel (8", 2 assembly pins), Clutch (8", 6 coil springs),
Splines (course), clutch release arm (short pedestal, large carbon
bearing), short slave
Series II - Flywheel (8", 3 assembly pins), Clutch (8", 9 coil springs),
Splines (course), clutch release arm (short pedestal, large carbon
bearing), long slave
Series 3 - Flywheel (8", 3 assembly pins), Clutch (8", diaphram spring),
Splines (course), clutch release arm (tall pedestal, large carbon
bearing), long slave
Series IV (up to B94100001) - Flywheel (8", 3 assembly pins), Clutch
(8", diaphram spring), Splines (course), clutch release arm (tall
pedestal, large carbon bearing), long slave.
Series IV (Late) - Flywheel (7.5", 3 assembly pins), Clutch (7.5",
diaphram spring), Splines (course), clutch release arm (tall pedestal,
small carbon bearing), long slave
Series V (up to B395017308)) - Flywheel (7.5", 3 assembly pins), Clutch
(7.5", diaphram spring), Splines (course), clutch release arm (tall
pedestal, small carbon bearing), long slave
Series IV (Late) - Flywheel (7.5", 3 assembly pins), Clutch (7.5",
diaphram spring), Splines (fine), clutch release arm (tall pedestal,
small carbon bearing), long slave

Everyone check Rick's catalog, he pretty much lays all this out in the
correct manner.

--

Jan Servaites (Dayton OH - The Birthplace of Aviation)

wright-brothers.org/

"I am convinced that human flight is
possible and practical."
-- Wilbur Wright, 1899
 
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Curious about the series 2 clutch disc having 9 coil springs. My dad had a series 2 and he marked a 6 coil spring disc as being for a series 2. He had swapped the 1600 with a 1725 in his series 2 and I believe he kept the original pressure plate and clutch disc from that 1600.

1719111971844.png

Thanks,
Mike
 
SS lists 4 different Pressure Plates:

PP1
PP2
PP3
PP5

PP3 SEEMS to be the most common,

just by virtue of availability.

At this point, I'm not sure

how many bolt/pin patterns there are, 3 or 4.

And/or interchangeability between PP2-3.

So I am guessing/hoping the 2 TTV part numbers above

are for PP3 and PP5.

DW
 
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The LW flywheel issue occasionally flashes on my radar screen

and I keep blaming the fact I don't have a LW flywheel for why

I don't build another Racing engine...

So I'm back on the task of getting some LW flywheels.

At this point, TTV has agreed to make some custom flywheels

with a dual PP mounting.

There is no special part number, Yet.

It is just known as a "1910 Dual clutch"

More info as it comes.

DW
 
A lightweight flywheel has a lot of merit. It would have a lot more merit if it worked with a readily available 21st century clutch cover and clutch disc. While you're at it, how about a modern / readily available throwout bearing?
 
I think Part # SPM-2025 is in order... ;-)

The TTV Flywheels are expected to be Duel PP mounting.

8" 3 pin , S2-3?
and 7 1/2" 3 pin, S5

Here is Hoping.

DW
 
Yup, Street And Track Fighting,

LOOT,... $ ... LBs wired this AM for a small Batch.

The CLOCK is started.

DW
 
I counted 12 threaded holes and 6 dowel holes.

One thing I would change is the threaded holes

have an overly generous countersink that reduces

the number of threads, and with the thin steel,

more threads be better.

But this is just the start of the incoming QC/QA ...

DW
 
Hmm. QC/QA appears obvious. Hope that the dowel pins find enough "flesh" to hold in too. This could also represent an issue...
 
Well, if one don't care about getting off the start line quickly, a lighten flywheel is for you
(Why? A heavy flywheel stores energy at the the line if one doesn't have the HP)
Jan
 
So, the T-5 transmission uses 1-1/16" 10 spline..... looking at a series III cover, and an eight and one half inch disc. There is (I think) a 1984 fox body mustang 8-1/2" disc that fits T-5 input shaft. Your lightweight flywheel may fill the bill to fit the series III clutch cover!
 
The LW Flywheel is reported to be 5 KG or 11 pounds.

It's a little heavier than the 1910 or 2057.

I checked all the threaded holes, 5 /16 Fine.

They asked if I wanted Metric thread, nope.

I checked the Bolt hole and Pin hole locations.

ALL the pressure plates I have will BOLT up, S1-5.

However, S1 PP has only 2 pins, those pin holes

would need added, the Bolt pattern is the same as S2-3.

So far so good.

One thing I just noticed, the Flywheel to crankshaft

bolts have minimal head clearance.... Hmmmm.

DW
 
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