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Old 10 Dec 2014, 19:55 (Ref:3483795)   #1
smiffey
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smiffey should be qualifying in the top 10 on the grid
Hillclimb/Sprint

Hi - I'm looking to enter my Mg Midget for several Luffield events next season and have a technical question relating to my car.

I am replacing the existing 1098 engine with a 1275 engine bored out to 1330 plus a few further mods and estimate that the output would be around 100bhp at the wheels

My question is would the 1098 gearbox do the job?

Thanks in advance.
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Old 11 Dec 2014, 19:05 (Ref:3484172)   #2
Dan Friel
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Dan Friel should be qualifying in the top 10 on the gridDan Friel should be qualifying in the top 10 on the grid
I would post this in the historics sub-forum or find an MG forum elsewhere..
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Old 11 Dec 2014, 20:57 (Ref:3484207)   #3
MGDavid
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MGDavid is going for a new lap record!MGDavid is going for a new lap record!MGDavid is going for a new lap record!MGDavid is going for a new lap record!MGDavid is going for a new lap record!MGDavid is going for a new lap record!
unless it's a very early 1098 Midget, the ribcase gearbox is the same as the 1275 ones. Casing, shafts and bearings are all identical, the early ones have 'A' type gears and the later ones 'B' type. The difference was a change to the helical cut angle, supposedly in search of quieter running, but i don't know if it made a difference to the strength. Feel free to PM me if you want more info.
I'd be surprised if you can get 100 at the wheels from a 1330, more like at the flywheel. But it all depends on whose rolling road you use !
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Old 13 Dec 2014, 17:46 (Ref:3484714)   #4
smiffey
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smiffey should be qualifying in the top 10 on the grid
Thank you.

MGDavid, I have PM'd you.
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