Seller got back to me.. "1275 bored out +40 by southern cylinders" so not 1350 or 1330 ? car has sold now anyway...
Piper 300 Cam In Fairly Standard 1275 Damage To Engine ?
Started by
Kevwana
, Sep 30 2016 09:47 PM
21 replies to this topic
#16
Kevwana
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Posted 04 October 2016 - 08:56 PM
#17
Cooperman
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Uncle Cooperman, Voted Mr TMF 2011
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Posted 04 October 2016 - 09:23 PM
Whenever you buy a used engine, especially one with parts that increase the power/torque from standard, expect and budget for a re-build.
#18
Kevwana
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Posted 06 October 2016 - 10:28 PM
Whenever you buy a used engine, especially one with parts that increase the power/torque from standard, expect and budget for a re-build.
Am going to look at a couple of standard 1275 engines tomorrow and have found a local engineering firm who are going to bore it out to 1380 for me and carry out all the necessary machining and prep on the block/head/crank... The chap has lots of experience with a series engines and has come highly recommended. Has suggested going with Kent 276 cam or Swiftune Sw5, power max or Omega Pistons, dry deck kit for better water flow, centre main strap kit, steel flywheel.. His dad and him have both been into racing and building minis for years, sounds like he knows his stuff so hopefully pickup a good donor engine and we'll go from there..
#19
gazza82
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Posted 06 October 2016 - 10:55 PM
Don't bother going to 1380 ... Just go up one bore size if the engine needs it. 1293 is +20thou, 1310 +40 and 1330 is +60 and after that you are into offset bores and £££s. There isn't a great power difference either.
#20
FlyingScot
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Up Into Fourth
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Posted 07 October 2016 - 06:46 AM
Good luck with getting a decent motor, by the way who are you using for the machining?
PM if you don't want to post up - just interested.
FS
PM if you don't want to post up - just interested.
FS
#21
Spider
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Moved Into The Garage
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Posted 07 October 2016 - 07:40 AM
Slightly OT, sorry for this!
Don't bother going to 1380 ... Just go up one bore size if the engine needs it. 1293 is +20thou, 1310 +40 and 1330 is +60 and after that you are into offset bores and £££s. There isn't a great power difference either.
If the block is ever intended to be off-set bored, which after 0.060" is really a very good idea, it really needs to be done so from about the second oversize, if the stars align, however, preferably, from the first.
But, I agree completely, that for street use, and for that matter, most competition purposes, there's little point going over 0.060".
#22
Kevwana
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Posted 07 October 2016 - 08:00 AM
Cheers "FlyingScot" ... Getting work done by a chap called Jim @ Newmarket Engineering in Stirling, comes highly recommended..Good luck with getting a decent motor, by the way who are you using for the machining?
PM if you don't want to post up - just interested.
FS
Hopefully at least one of these engines I'm going to see will be a goodun..
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