Apologies for raising this again

[SteviegtrParticipant @steviegtr]

Takes me back to my 1st car, a Morris miner 1000. Then 1100, then twin carbs & 3 branch, then 1800 MGB engine & gearbox,, then the car broke in half. Traveller model with alloy roof & bolted side beams was never very strong. Lightened flywheels were a good way of getting the engine to rev more freely but often became lumpy at the bottom end. Bought a MGB GT after that. Jesus that was 50 years ago. Need to sort out a funeral plan & my will.

[martyn nutlandParticipant @martynnutland79495]

Many thanks all. I will have a go and report back.

The question as to 'why bother' is sensible. It's just that, although it will be out of sight, it looks and is a mess and offends the eye.

Back soon

[StueeeeParticipant @stueeee]

Posted by Mike Poole on 19/01/2020 22:29:44:

That really does look like a crank that would have a severe rigidity problem if any tuning was applied to that engine.

Lots of Austin Seven engines with 2 bearing crankshafts have been tuned for performance, not usually to the extent of this motor, which also has a 2 bearing crank -albeit a reproduction EN40 Nitrided one rather than the Austin factory item.

[Former MemberParticipant @formermember19781]

[This posting has been removed]

[StueeeeParticipant @stueeee]

Yes 2 plugs per cylinder, It has a twin spark distributor driven directly off the end of the camshaft.

[Howard LewisParticipant @howardlewis46836]

I believe that the technique with the two bearing crank, (which was less prone to breakage than the later three bearing one ) was to fit low compression pistons in 2 and 3, and high compression in 1 and 4. When the crank whipped at high revs, the compression heights became nearer equal so that each cylinder then produced, all other things being equal, equal power.

Not sure whether it was the Austin 7 or the 1172 Ford E93 engines, tuned by Colin Chapman, which brought about the 750 Club ruling that "The function of the Inlet and Exhaust ports shall not be reversed"

Howard

[Eric LucasParticipant @ericlucas71410]

assuming it’s not a racing Special we are talking about, then making the flywheel lighter, then it means

it will tick over like a bag of hammers.

surely it’s nicer to have an old engine running like a sewing machine on tickover?

why not leave the teeth on?

(both me and my 1933 Morris 10 have all our teeth )

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