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Austinsevenfriends › Austin Seven Friends Forum › Forum chat... v
bantam turbo

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bantam turbo
Stuart Giles Offline
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Location: N W Kent
#21
03-03-2019, 09:34 PM
Can't see why 5 lb or so of boost would cause problems with the block-crankcase joint; we ran 8.5 lb of boost on an A7 racecar for several seasons without any issues with that joint. I'm not sure I would run such a fine filter as 70 microns on the suck side of the oil pump though; something a bit more like a tea strainer on the inlet side would be all that's necessary to protect the pump along with a conventional full flow filter on the outlet side.
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Boaty Offline
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#22
10-03-2019, 08:48 AM
Good on you Steve, you will learn alot from this project and i assume that you are not chasing 5lbs manifold pressure but more like 30 or 40lbs and yes you do need to address keeping the block on however you need to address head studs and gasket first as they will give trouble almost immediately, iam talking from experience and have ran Austin 7s above 40lbs.
Best of luck 
Regards Paul Boatwright
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Alan Offline
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Location: Cheshire
Car type: Race Ulster, 1926 Special, 1927 Chummy, 1930 Box
#23
10-03-2019, 01:51 PM
That sounds interesting. Can you tell us more?
Alan Fairless
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steve anderson Offline
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#24
04-01-2020, 04:18 AM
It's been 7800 rpm and still fine . 5# boost , more in 2020   !!   STEVE
<p><br></p>
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Chris KC Offline
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Location: Darkest Bedfordshire
#25
04-01-2020, 09:12 AM
Very interesting Steve. It's not what I'd do with my own car but I shall be fascinated to hear how it goes.
I do agree with Stuart Giles though, I'd think twice about that oil pump inlet side filter - a strainer is no problem, but so fine a mesh on the 'suck' side risks cavitation.
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