Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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Guy selling this engine says it has apparently been bored out to a 1.8, block would surely not be able to take that?
http://cgi.ebay.co.uk/Vauxhall-Corsa-GSI-1-6-16v-engine-box-ancillaries_W0QQitemZ190008461675QQihZ009QQcategoryZ10404QQrdZ1QQcmdZViewItem
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L30 SCT
Member
Registered: 27th Nov 05
Location: aberdeen
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lingards one was bored out to a 1.8 was it not
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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no his one was the lower side of 1.7
Alison's is a 1.625 
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marklawton
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Registered: 24th Apr 05
Location: Pensby, Wirral Drives:Golf mk4 GTI
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yeah, seen that the other day, hes only round the coner from me,
i thought the limit was 1.7 that a 1.6 could get bored out to
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L30 SCT
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Registered: 27th Nov 05
Location: aberdeen
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was his realy a 1.7 though?
i might buy a bottom end and build it up next. just a week away from finishing my head now.
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L30 SCT
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Registered: 27th Nov 05
Location: aberdeen
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with no paper work do you realy trust his word for it?
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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yeah he never built it that way though think it was Bradz that had that done, it will have been close to 1.7 i wouldnt have thought it would have been that much though. probs 1.675 or something. yours is only a 1.598 
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L30 SCT
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Registered: 27th Nov 05
Location: aberdeen
User status: Offline
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how is alisons a 1.625?
would it make much difference boring it out to 1.675'ish
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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previous owner bored hers out and put in larger pistons, not 100% sure what the increase was to be honest got receipts
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ainsley_brader
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Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
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Well doing some quick maths and using sbd's site the smallest pistons they do is 79 mm which would make the stroke 81.5 and give us 1598 cc.
If you bore it out square to 81.5 mm (the biggest pistons sbd offer) it will give you 1701 cc a perfect 1.7.
To get upto a 1.8 you would need to bore it to 84mm (giving 1807cc).
Do you really think a 5mm rebore over standard is possible?
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ainsley_brader
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Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline
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quote:
Originally posted by L30 SCT
how is alisons a 1.625?
would it make much difference boring it out to 1.675'ish
Assuming alisons was a .5 mm overbore using 79.5mm pistons it would actually make it a 1618cc. Pointless from a tuning point of view you would only do it to take up wear in the bores!
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Stoneyginger
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Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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i'll find the receipts for the pistons and let you know which size they are so we can figure it out
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Stoneyginger
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Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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receipts say something along the lines of supply ux Pistons 5.5mm not sure if that is the increase in piston size or the bore work that was done on the block. 
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BeArDy
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Registered: 7th Aug 00
Location: Manchester
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i dont know mate i know a few people on here who could talk to it for a few hours and bore it out to a 4lt 
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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@ Beardy can see what your saying there mate
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
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like all these 2.1's.... that arent actually over 2.05
I was on 88mm pistons (max bore size) for my real 2.1 (well, rounded )
gone done to 87mm now.... so back to a 2.0
new block
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L30 SCT
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Registered: 27th Nov 05
Location: aberdeen
User status: Offline
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ak how much are you to get the cylinders bored out, just to see if it is worth buying a bottom end and rebuilding it.
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Stoneyginger
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Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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the bill for boring out and fitting new pistons was £398 
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L30 SCT
Member
Registered: 27th Nov 05
Location: aberdeen
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tbh i thought it would have been around that. i might get it done next year after i get the car sprayed.
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Stoneyginger
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Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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bare in mind that was for taking out old pistons, rebore and putting back in the new bigger pistons
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L30 SCT
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Registered: 27th Nov 05
Location: aberdeen
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what sort of gain do you think you would get by boring it out to 1701cc. about 5bhp or something, just a guess
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
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mate best way to find out is to do it
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L30 SCT
Member
Registered: 27th Nov 05
Location: aberdeen
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fuck it its getting done and its getting done soon, the spraying can wait. will prob just get:
new pistons
bored out to 1701
steel rods
crank lightened and balanced
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
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boring will only cost 50quid or so...
its the labour for stripping the pistons out, then in etc that'll mount it up
No replacement for displacement. But on a mild engine i wouldnt bother
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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are you going for tb's? .... if not, dont bother with any of that
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