Aluminum Flywheel?

[alpine_64]

Dan what was the weight in the end for the prototype?

 

[jdoclogan]

Dan, I don't want to diminish or in anyway interfere with your efforts to assist all of us with acquiring a light weight flywheel. I merely want to share what I have found. I have been in communication with a UK company producing Alpine lite steel flywheels and this is what I have found.

Cost - (299BP) = $370 USD including shipping
Weight - 4.35 kg = 8.59lbs
Clutch - 215mm = 8.46 inches

 

[jdoclogan]

Ever consider just having the stock one lightened?

I liked the article Jan wrote in the Marque magazine and the illustration of the stock flywheel to Le Mans flywheel. I have the original Harrington Le Mans lightened flywheel in my Promotional HLM. However, the weight reduction only goes from 23.5 lbs (stock) to 19 lbs (lightened).

 

[jdoclogan]

The same company also makes a flywheel for the 1725 engine with 7.2 inch clutch. It weighs in at 3kg = 6.6lbs.

 

[65beam]

I liked the article Jan wrote in the Marque magazine and the illustration of the stock flywheel to Le Mans flywheel. I have the original Harrington Le Mans lightened flywheel in my Promotional HLM. However, the weight reduction only goes from 23.5 lbs (stock) to 19 lbs (lightened).

Two of my Harringtons ( 9112251 & 9112185 ) still have the original lightened flywheels. Thanks for the info on the weight of yours. I haven't ever taken the time to check the weight of them. That brings up another question. Were the originals all the same weight or did it vary from engine to engine?

 

[jdoclogan]

From 1592 to 1592?

 

[RootesRacer]

My SII weighed like 28lbs.
Thats a nice looking flywheel, but whats the friction disk going to run on, surely not the aluminum?

 

[jdoclogan]

My SII weighed like 28lbs.
Thats a nice looking flywheel, but whats the friction disk going to run on, surely not the aluminum?

I have several 1592 and 1725 flywheels. I measured two randomly selected flywheels on two different scales. The 1592 and 1725 flywheels each were between 23 and 24 lbs closely matching Jan Servatis measurements for a 1592 back in the Fall of 2003.

My bad, the company makes these out of steel. I changed the information previously posted. I will say, amazing engineering and manufacturing technique to reduce the flywheel several pounds.

 

[65beam]

From 1592 to 1592?[/QUOTEJerry,
Jerry,
The LeMans , unlike the A,C or D Harrington conversions were a standardized conversion built for Rootes for sale thru dealers and not available for order by anyone but Rootes. The stage 2 1592cc engine with a few other additional changes such as other head work, carbs, and different clutch to name a few was a standard part of the conversion as ordered by Rootes. My question is how close in weight were the flywheels of the 250 cars since the engines of all cars were intended to be built to the same specs? Just curious.

 

[spmdr]

Well, I guess when it rains, it pours? All of a sudden there IS a LW FW available.

When I dropped off the iron FW to copy, the guy asked me how light I wanted the Al FW.

I told him as light as practical, I didn't want to sacrifice strength for extra light weight.

And, as mentioned I like the SV clutch stuff for the smaller size and less weight.

However, I JUST noticed in the SS catalog (2012), the SV PP is N.L.A. Hmmmm

BUT, the early 8" PP IS still available. Hmmmm.

I guess I NEED to get to the bottom of WHAT is available and what is NOT.

I have always used SV clutch stuff because I have so much good used stuff.

I don't think I have bought any NEW clutch stuff out side of TO bearings.

I guess I still need to do some more homework...

DW

 

[jdoclogan]

I doubt that there are any records to answer your question.

 

[spmdr]

I didn't realize replacement clutch parts were in such short supply!

I need to check all my sources of parts to see what the pipeline of Alpine clutch parts is.

I need to check what other more common clutch parts could be used on the Alpine.

Maybe the New FW needs multi PP bolt patterns.

 

[jdoclogan]

Well, I guess when it rains, it pours? All of a sudden there IS a LW FW available.

When I dropped off the iron FW to copy, the guy asked me how light I wanted the Al FW.

I told him as light as practical, I didn't want to sacrifice strength for extra light weight.

And, as mentioned I like the SV clutch stuff for the smaller size and less weight.

However, I JUST noticed in the SS catalog (2012), the SV PP is N.L.A. Hmmmm

BUT, the early 8" PP IS still available. Hmmmm.

I guess I NEED to get to the bottom of WHAT is available and what is NOT.

I have always used SV clutch stuff because I have so much good used stuff.

I don't think I have bought any NEW clutch stuff out side of TO bearings.

I guess I still need to do some more homework...

DW

Dan, I wish I had gotten the info back sooner. Oh well, on we go. SS 7 1/4" PP is still NLA (2016 catalog). The 8" II and III (Call US) is listed. 8" Series I is still available for $195. I seem to remember having a PP rebuilt some years ago. I'll have to check into that. I have several used ones in my stock.

 

[alpine_64]

Dan, so what was the final weight of the prototype?

On the clutches the earlier larger ones have decent availability as the early 60s MGs used the same parts. The early alpine can also use mga pressure plates

 

[spmdr]

I don't know a weight yet. I'll quiz them about the details and check out what info they have on Alpine stuff tomorrow.

I really don't look forward to the prospect of using MGA clutch parts...

Steve Alcala has an early iron FW that has been cut to the bone but it's still quite heavy and the PP is huge.

Michael, what has been your history of Alpine clutch use/desires?

DW

 

[alpine_64]

Hey Dan,

Putting out some fires at work..

Ill email you at the start of next week on some flywheel PP and clutch stuff. ;-)

 

[jdoclogan]

I went ahead and ordered the significantly lightened (4kg) 1592 flywheel (3 assembly pins) from TTV Industrials in UK (http://ttvracing.com/product/sunbea...ls&engine=sunbeam-alpine&manufacturer=sunbeam) We shall see how long it takes to get the FW to my location from the UK under the duress of the global state of affairs. Check out their PP and clutch assemblies (http://ttvracing.com/clutches/). My concern is they probably don't have Sunbeam matching 10 spline clutch plates.

In my research I found Jan Servatis' very dutiful summation on original clutch assemblies shown below:

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 (Sunbeam Specialties), he pretty much lays all this out in the
correct manner.

Michael send along your flywheel PP and clutch stuff info to me as well.

 

[hartmandm]

Assume that should read "Series V (Late)"



Mike

 

[jdoclogan]

Well noted Mike.

 

[jdoclogan]

Dan, it appears that Sunbeam Spares in UK has the Series V Clutch cover https://sunbeamspares.com/shop/alpine-parts/337-clutch-cover-exchange.html.