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 102 Posts Member #: 180 Advanced Member Northants |
8th Feb, 2006 at 12:24:45am
A little while ago i went to see a well known engine builder who was building his own engine. While we were talking he mentioned he'd ofset bored it to 1310 and had almost the original amount of metal inbetween 2 & 3 Is this commen? And what are your thoughts on it? |
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102 Posts Member #: 180 Advanced Member Northants |
8th Feb, 2006 at 12:28:09am
Forgot to mention he did say you could only do it from 1275 and not 1293 |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
8th Feb, 2006 at 07:56:42am
Which way did he offset bore? As far as I can remember, in standard 1293 bore, the amount of material between the bores is very similar.
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
8th Feb, 2006 at 09:33:06am
thats a plus 40 over bore actual works out at 1312cc not 1310cc i bet he is of the old school!
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
8th Feb, 2006 at 09:55:06am
You can from 1275 to 1312, as mentioned, but there's still no point in doing it...
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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Site Admin  15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
8th Feb, 2006 at 10:22:34am
It is technically possible to offset bore that small. In my autograss days we were only allowed to bore +60 on a 998 engine, so the common mod was to offset the bore forwards as much as possible, the thinking being that the increased moment on the crank might give you a shade more torque. No way of measuring it, but every little helps....especially when you are a 6'1" big hefty fucker racing against some little tiny runt.........
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
8th Feb, 2006 at 10:31:06am
More torque, and more friction losses between piston and cylinder... Which won? :) On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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Site Admin 15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
8th Feb, 2006 at 12:04:31pm
Who knows.....LOL
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
8th Feb, 2006 at 12:38:45pm
yes like you say theres no point at all on the above thread
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