anyone know the biggest ever bore got from an a-series.
in vizards book there is a 1600 mini and ive heard about the Italian job minis having st engines at something stupid like 1750, which i find ridiculous!
also wondered what could be the biggest size got from a 998, or an 848 for that matter.
not that i want to do it... just asking.
Biggest Ever Bore Size?
Started by
woody17
, Aug 26 2008 07:13 PM
19 replies to this topic
#1
woody17
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Posted 26 August 2008 - 07:13 PM
#2
Jammy
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Posted 26 August 2008 - 07:21 PM
Don't think thats quite right....in vizards book there is a 1600 mini and ive heard about the Italian job minis having st engines at something stupid like 1750, which i find ridiculous!
Biggest you really want to go on a 1275 block is a 74mm bore.
Have a look at this page.
#3
bebbinator
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Posted 26 August 2008 - 07:22 PM
the 1600 you were on about is probably a 1500 maxi engine overbored two 1600 and the 1750 is also out of a maxi
the biggest overbore that you can do and still have a usable car is 1450 from a 1275
the biggest overbore that you can do and still have a usable car is 1450 from a 1275
#4
mini_surfari
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Posted 26 August 2008 - 07:22 PM
Largest you can get on a 1275, is 1556cc. Thats with a 74mm bore and a 91mm stroke.
#5
Rosslin Racing
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Posted 26 August 2008 - 07:29 PM
74.65mm is the biggest (I think not sure about the 65 but it was over 74) that was in a mini mag some time ago bet the cylinders are like paper.
#6
Shifty
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Posted 26 August 2008 - 07:32 PM
Didn't autosprint do a 1600cc(approx) A series in the '70s
I remember seeing a black and white pic in CCC mag(before it went carp!!)
I remember seeing a black and white pic in CCC mag(before it went carp!!)
#7
mini_surfari
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Posted 26 August 2008 - 07:33 PM
74.65mm is the biggest (I think not sure about the 65 but it was over 74) that was in a mini mag some time ago bet the cylinders are like paper.
I wouldnt have thought that 74.65mm bore would last 5 minutes.
#8
Rosslin Racing
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Posted 26 August 2008 - 07:35 PM
I would agree total! its in a miniworld from just after the war see if i can find it
#9
1275 SPRITE
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Posted 26 August 2008 - 08:47 PM
What about the 998?
What can the 998 be bored and stroked to?
What can the 998 be bored and stroked to?
#10
Rosslin Racing
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Posted 27 August 2008 - 05:05 PM
998 can be take out to 1215cc with an 1100 crank.
Edited by Rosslin Racing, 27 August 2008 - 05:42 PM.
#11
alexcrosse
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Posted 27 August 2008 - 05:15 PM
SMMC have done 1600's before, 92mm crank.
They said it was like selling someone a grenade but keeping the pin.
They said it was like selling someone a grenade but keeping the pin.
#12
mini_surfari
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Posted 27 August 2008 - 08:37 PM
SMMC have done 1600's before, 92mm crank.
They said it was like selling someone a grenade but keeping the pin.
Building an engine like that would be a total waste of money and parts. But would be good to do lol.
#13
alexcrosse
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Posted 27 August 2008 - 08:38 PM
exactly!!!
certain things just have to be done =p
certain things just have to be done =p
#14
v8mini
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Posted 27 August 2008 - 09:09 PM
i used to work with Stud Nicolaou who ran the 1600 Autocross mini mentioned in Vizards book.
if i'd have met him 6 months earlier i would have been given the engine and a garage load of spares that he gave away.
in the book it says Triumph 2.5 pistons were used @ 74.7mm and 91 crank giving 1596cc
if i'd have met him 6 months earlier i would have been given the engine and a garage load of spares that he gave away.
in the book it says Triumph 2.5 pistons were used @ 74.7mm and 91 crank giving 1596cc
#15
jbeenz
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Posted 28 August 2008 - 01:43 AM
This post needs pics, Sooo, first up is a smallbore offset @ 68mm (aprox 160 thou over) with Hillman imp pistons giving 1220cc on a 1098 crank, you can *somtimes* get another 20 thou, but somtimes you hit water or oil 
- this engine is going in a 67 commercial van
Next up is the "lightweight", 1275 block, offset to 74.7mm giving 1426cc with stock crank, the triumph 2500 are short, so the block has been decked as such. This one is going in an elf mk2
- this engine is going in a 67 commercial van Next up is the "lightweight", 1275 block, offset to 74.7mm giving 1426cc with stock crank, the triumph 2500 are short, so the block has been decked as such. This one is going in an elf mk2
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