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Lightweight vernier cam timing kit

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Lightweight vernier cam timing kit
#1
SolarEvolution Bradley Wood
Burton Upon Trent, Derbyshire, UK   GBR
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Morning

Does anyone know of a light weight duplex vernier cam timing kit?
If there are multiply, who makes the lightest?
There some pretty impressive kits available for the mini, like the one in the link below.

https://www.med-engineering.co.uk/products/vernier-duplex

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Re: Lightweight vernier cam timing kit
#2
MGB567 Avatar
MGB567 Barrie Braxton
Ninderry, KabiKabi country, Queensland, Australia   AUS
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1966 MG MGB MkI "Money Guzzler"
1979 MG MGB GT V8 Conversion "Darkside"
Have you read this?


Mk1: CKD 11/66 first registered 8/5/67; owned since 3/77. 18GB +40 balanced. Peter Burgess BVFR head. Piper 285. 123. FidanzaFW. 4synch c/r box. Lots more as I did a nut and bolt rebuild; finished 2015. Tartan Red.

GT: December '78. VW Golf guards, flush fit front and rear valances. Torana XU1 vents, frenched indicators & Mk1 rear lights. 'Worked' Rover V8 with Monsoon ECU for EFI. GM4L60E, Lokar tiptronic & Quick4 controller. Vintage Air A/C. FC IFS. CCE 4 link rear. Salisbury with Quaife. Jaguar Storm.

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Re: Lightweight vernier cam timing kit
#3
SolarEvolution Bradley Wood
Burton Upon Trent, Derbyshire, UK   GBR
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Hi, yeah I’ve read that one, it doesn’t say anything about a specific light weight variant, though, the one installed appears to be lighter than the standard item.

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Re: Lightweight vernier cam timing kit
#4
hoffman900 Bob A
Front Range, CO, USA   USA
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1978 Yamaha MC TT500 "Flat Tracker"
This is not where to save weight.

In many applications, including former Indy Car, F1, and Superbike engines, they add weight to the cam timing gears to reduce angular velocity fluctuations, in the valvetrains. With the long pushrods these engines have and relatively small base circle cams, and without writing a dissertation, I’d be doing everything I could to reduce them as well.

The net effect of reducing weight here increases the amplitude of fluctuations and lower the point you lose control of the valvetrain for a given lobe profile.



Edited 4 time(s). Last edit at 2024-04-12 10:16 AM by hoffman900.

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Re: Lightweight vernier cam timing kit
#5
pinkyponk Avatar
pinkyponk Gold Member Adrian Page
Berwick, NS, Canada   CAN
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1958 MG MGA 1500
1961 Austin-Healey Bugeye Sprite
1971 MG MGB GT
1973 MG MGB MkIII
Here's how to do it yourself for pocket change: https://www.mgexp.com/forum/mgb-and-gt-forum.1/how-many-thou-is-a-4-degree-cam-key-off.3769495/

It avoids adding a mass of bolted together parts flailing around inside your engine. Probably never come apart but the possibility exists. Unnecessary complexity for a simple task. You still have to check the adjustment either way.

Adrian


Home built Eaton M62 Supercharger with 8psi boost, 8:1 compression, custom "supercharger" cam from Schneider Cams, Mikuni HSR48 Carburetor, custom ground high ratio "stock" rocker arms, Maxspeeding rods with Teflon wrist pin buttons, custom aluminum cold air intake, CB Performance computerized ignition, Fidanza 9 pound flywheel, 1.44 exhaust valves in 48cc chamber head, matched manifolds, 2 1/4" exhaust system.


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