Lotus Elan

Steel Crankshaft Elan

PostPost by: gino1 » Mon Nov 24, 2003 10:31 pm

Hi all,
I've recently bought the bottom end of a big valve engine and from the photos i've found in one of the Lotus books I have it appears that the crankshaft is the steel type with double webbing.
Anyone know anything about this matter?
Did the later Big-Valve engines have a standard cast iron shaft with double webbing fitted that resembled the steel version?
How can I tell that the crankshaft is steel or cast iron?
Anyone got any photos.
Would appreciate to hear from you.
Thanks
Gino - Italy
1965 Elan S2 Roadster
1965 Elan S3 Coupè
1967 Elan S3 Coupè
1968 Elan S4 Coupè
1969 Elan +2
1968 Lotus Seven S3
1961 Ford Anglia
User avatar
gino1
Fourth Gear
Fourth Gear
 
Posts: 585
Joined: 12 Sep 2003
Location: Milano - Italy

PostPost by: steve » Tue Nov 25, 2003 6:59 pm

take a look on burtons website ,its easy if you know what to look for ,the webs on a steel crank are double webs and are equal lenths and are matched not like the standard crank they are also flat tapered instead of having a heal on it ,the finish on the steel crank is grey and smooth the standard crank is textured and black hope this helps , :blink: hail to the rabbi ;)
"everyone wants a piece of me and it hurts "<br>when my right leg starts shaking thats when i know i am having fun !
steve
First Gear
First Gear
 
Posts: 29
Joined: 12 Sep 2003

PostPost by: gino1 » Tue Nov 25, 2003 8:07 pm

Hi Steve,
Thanks for your reply. I've been on the web site you have suggested but the photograph is repeated on every model represented.
However i'm still in the dark as the crankshaft is double webbed therefore does this mean it's steel?
They are also matched webs and are tapered on the external part.
The colour is however dark.

I would appreciate any other remarks you may have on this topic.

During the weekend i shall see if there are any identification marks to help this enigma.

Cheers

Gino - S3 Elan - Italy
1965 Elan S2 Roadster
1965 Elan S3 Coupè
1967 Elan S3 Coupè
1968 Elan S4 Coupè
1969 Elan +2
1968 Lotus Seven S3
1961 Ford Anglia
User avatar
gino1
Fourth Gear
Fourth Gear
 
Posts: 585
Joined: 12 Sep 2003
Location: Milano - Italy

PostPost by: rgh0 » Wed Nov 26, 2003 11:43 am

Gino

Any double webbed crank, by which I presume you mean, 8 counterweight crank is almost certainly steel. 4 counterweight cranks may be Cast Iron or Steel if machined up from the Datsun crank but to my knowledge no one ever made a 8 counterweight cast iron crank for the Ford block.

All orginal Lotus twin cams in production cars used the 4 counterweight cast iron crank.

Can you post a photo of your crank and someone knowledgeable in these may be able to identify its source.

Rohan
In God I trust.... All others please bring data
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 7162
Joined: 22 Sep 2003
Location: Melbourne, Australia

PostPost by: gino1 » Thu Nov 27, 2003 7:13 am

Thanks Rohan,
I shall post some photos next week.

Gino - Italy
1965 Elan S2 Roadster
1965 Elan S3 Coupè
1967 Elan S3 Coupè
1968 Elan S4 Coupè
1969 Elan +2
1968 Lotus Seven S3
1961 Ford Anglia
User avatar
gino1
Fourth Gear
Fourth Gear
 
Posts: 585
Joined: 12 Sep 2003
Location: Milano - Italy

Total Online:

Users browsing this forum: No registered users and 4 guests