alistairolsen
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| posted on 24/11/08 at 09:39 AM |
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ok,so you buy x number of 1300 engines which obviously helps you to get the lightest crank and rod and piston (one of which must remain unmachined) so
that in turn you can machine the lightest possible set of four rods and pistons.
What do you do with the bearings? Just match up the loosest set that are closest to identical?
Anyone want to elaborate?
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procomp
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| posted on 24/11/08 at 10:53 AM |
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Hi
This is getting a bit silly now. First my comment regarding blue printing was referring to an engine capable of 9k Not a locost running to a more
sensible 7.5k.
Second You certainly do not need to go and buy a load of engines and start finding the lightest components. They are all very close. You just need to
balance the crank flywheel and clutch cover as a unit and match the rods and pistons to the lightest in the batch you have. The regulations are very
clear as to what you can and can not do regarding the engine and ancillaries with a few more areas clarified in the soon to be released 2009
regulations with piston dimensions and clarification regarding the head. Although it is fair to say that it will not hurt to have a spare basic engine
to save time and effort at a later date should you ever require one.
Cheers Matt
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Fozzie
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| posted on 24/11/08 at 11:33 AM |
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quote:
Originally posted by procomp
Hi
This is getting a bit silly now. First my comment regarding blue printing was referring to an engine capable of 9k Not a locost running to a more
sensible 7.5k.
Second You certainly do not need to go and buy a load of engines and start finding the lightest components. They are all very close. You just need to
balance the crank flywheel and clutch cover as a unit and match the rods and pistons to the lightest in the batch you have. The regulations are very
clear as to what you can and can not do regarding the engine and ancillaries with a few more areas clarified in the soon to be released 2009
regulations with piston dimensions and clarification regarding the head. Although it is fair to say that it will not hurt to have a spare basic engine
to save time and effort at a later date should you ever require one.
Cheers Matt
Top Answer Matt! 
Even I was getting a bit confused......
as to whether you were talking about the Locost series engines, or others.... 
It wasn't very clear to the newbies (and the rest of us) that you and some others had gone just very slightly 'Off Topic' !
ATB Fozzie 
'Racing is Life!...anything before or after is just waiting'....Steve McQueen
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andrews_45
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| posted on 24/11/08 at 01:45 PM |
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Do not listen to supposed experts, you will meet lots along the way (and some of these can end up costing you a lot of money). Listen to what Matt
has to say, and do not make my mistakes.
**EDIT - to add that by experts I mean people who race but don't neccesarily build their own engines. The people on this post know their beans
[Edited on 24/11/08 by andrews_45]
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D Beddows
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| posted on 29/11/08 at 01:00 AM |
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quote:
What do you do with the bearings? Just match up the loosest set that are closest to identical?
No, in a proper performance engine building workshop you would have a set of go/no go gauges that had been turned up on a lathe to check bearing
clearances and you would probably in reality be able to mix and match several standard bearing sets so they fitted properly.... or you would bore the
housings so they did fit properly.... plastigauge is good for the home builder to check the same thing BUT having a few con rods etc and several
sets of bearings to mix and match is always helpfull...... loose is rubbish - as is tight - It's a tedious process as Syd has noted
and having a few engines isn't about picking the lightest bits because, as Matt has said they're not all that different, but as 1300
engines go for less than £50 having several is all about tolerances without having to pay for machining....
[Edited on 29/11/08 by D Beddows]
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