Lotus Elan

Starter motor on 711M block

PostPost by: HCA » Tue Oct 31, 2023 12:39 pm

Hope this is an easy one...

I have a note, but cannot read my own writing concerning starter motor for a 711M block concerning fitment.

Is the position of the starter motor the same for pre and crossflow? In my note I have the words 'cut off third bolt' and not a clue why I wrote it...)

In short, I am using a 711M block, long stroke 6B2D crankshaft, standard flywheel and ring gear. There should not be any issues bolting in my pre-crossflow hi torque starter motor, no?
Hal Adams
Evora SR
Elan +2
User avatar
HCA
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1139
Joined: 03 Jan 2020
Location: Limoux, France

PostPost by: Lyn7 » Tue Oct 31, 2023 5:21 pm

The later Ford starter motors were three bolt mounting flange. They are interchangeable in my experience.
It's a bit tight in that area on an Elan and sometimes the third bolt hole/flange will foul on the chassis.
On an original bellhousing there is of course no third hole.
Cheers, Lyn..
Lyn7
Second Gear
Second Gear
 
Posts: 125
Joined: 11 Jan 2010

PostPost by: rgh0 » Tue Oct 31, 2023 8:54 pm

I use a later 3 bolt Bosch preengage starter from Ford Escorts fitted with a 9 tooth pinion on both my Elan and Plus 2. I cut off the lug for the third bolt to provide clearance with the body.

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 9011
Joined: 22 Sep 2003
Location: Melbourne, Australia

PostPost by: HCA » Tue Oct 31, 2023 9:09 pm

I vaguely remember now - it was following a thread where this was the case. I made a hasty note on a post-it, but thought something else was involved regarding flywheel size. Maybe not. I shall continue as is!
Hal Adams
Evora SR
Elan +2
User avatar
HCA
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1139
Joined: 03 Jan 2020
Location: Limoux, France

PostPost by: 2cams70 » Tue Oct 31, 2023 10:19 pm

I note you say that you are using a standard flywheel. Is that a 711M standard flywheel or a LTC standard flywheel?
They are different.
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2022 Ford Fiesta ST.
2cams70
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2233
Joined: 10 Jun 2015
Location: Australia

PostPost by: HCA » Wed Nov 01, 2023 1:48 am

OK, thanks, you have helped jog my memory!
I have now worked out my writing! And yes, it is all about what flywheel and starter to use. So please let me start again:

I am using an un-decked 711M block for the new engine. This is to bolt onto a Lotus bell housing supplied by Alan Voigt with an internal centre thrust bearing.

Some comments in the past say that the 711M type flywheel can/does foul the bell housing and that I should use an original Twin Cam flywheel Is this correct please???

Now my note:
With a standard 6 bolt 2 dowel Lotus flywheel and clutch on the 711M, Do I need to change the starter motor???

In other words, is the ring gear the same for a Lotus standard flywheel and a 711M cross flow flywheel?
Hal Adams
Evora SR
Elan +2
User avatar
HCA
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1139
Joined: 03 Jan 2020
Location: Limoux, France

PostPost by: 2cams70 » Wed Nov 01, 2023 1:59 am

Suggest you don't use a 711M flywheel on a LTC. It's too heavy and the clutch pressure plate mounting bolt PCD will be incorrect for a LTC clutch. If you don't have an original LTC flywheel your best bet is to obtain a standard pattern steel replacement from Burton or QED.
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2022 Ford Fiesta ST.
2cams70
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2233
Joined: 10 Jun 2015
Location: Australia

PostPost by: HCA » Wed Nov 01, 2023 2:11 am

I have, or will have soon, a standard twin cam flywheel !

I know it is lighter, but is it the same diameter?
Hal Adams
Evora SR
Elan +2
User avatar
HCA
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1139
Joined: 03 Jan 2020
Location: Limoux, France

PostPost by: Lyn7 » Wed Nov 01, 2023 7:06 am

Yes the diameter of the flywheels are the same. It is the pcd for the pressure plate that is different for the different clutches. You could use the x flow flywheel and lighten it. You could re drill for the twin cam pressure plate to fit. Your choices.
Lyn7
Second Gear
Second Gear
 
Posts: 125
Joined: 11 Jan 2010

PostPost by: HCA » Wed Nov 01, 2023 8:17 am

Thanks Lyn. If the diams are the same, then ergo the starter pinion c/l is common, so I do not know why I made a note of using a three bolt starter...

(I will be using a standard flywheel as QED can get them machined for a trigger. I am waiting several months for it to arrive though!
Hal Adams
Evora SR
Elan +2
User avatar
HCA
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1139
Joined: 03 Jan 2020
Location: Limoux, France

Total Online:

Users browsing this forum: No registered users and 16 guests