J4LDO
Member
Registered: 19th Feb 03
Location: glasgow ish
User status: Offline
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whats involved in doin this,and does it make a noticeable diff?
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Munchie
Member
Registered: 17th Jul 01
Location: I swap goats for mobile phones
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PISS OFF
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J4LDO
Member
Registered: 19th Feb 03
Location: glasgow ish
User status: Offline
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eh? whats that awe aboot
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Daimo B
Member
Registered: 20th Mar 00
User status: Offline
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To make it a 2.1, you need oversized 88mm pistons. Think the block needs to be worked on as well to give the extra diametre.
Wont give hugggeeee increase, but is a good start if you want to put throttle bodies on in the future.
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J4LDO
Member
Registered: 19th Feb 03
Location: glasgow ish
User status: Offline
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its basically a rebore then ?
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Makarus
Member
Registered: 25th Jun 02
Location: Nottingham/Derbyshire Boarder.
User status: Offline
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The Omega pistons are a good replacement so I am told.
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Neshol
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Registered: 10th Jul 02
Location: Midlands
User status: Offline
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Yes rebore of a C20XE I imagine
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Daimo B
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Registered: 20th Mar 00
User status: Offline
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quote: Originally posted by J4LDO
its basically a rebore then ?
Yeah, standard 2.0litre bored out.
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Adam_B
Member
Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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get pocketed pistons as well then u car run a monster cam, raaa!
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J4LDO
Member
Registered: 19th Feb 03
Location: glasgow ish
User status: Offline
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How much for pocketed pistons 88mm ?
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Marc
Member
Registered: 11th Aug 02
Location: York
User status: Offline
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is a 2.2 possible? as ive only seen 2.1s...
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Tiger
Member
Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
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Cutting it a bit fine upping to 2.2
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Neshol
Member
Registered: 10th Jul 02
Location: Midlands
User status: Offline
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Can someone explain pocketed pistons for me? Or direct me to some site with the relevant info... thanks!
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Andy
Member
Registered: 28th Dec 99
Location: Cumbria, UK
User status: Offline
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The key to getting more power out these engines is not just to fit longer duration cams (which keep the valves open longer for more fuel and air) but to fit higher lift cams. These raise the valve higher away from the head, again allowing more fuel and air in for more power. Problem is that the more valve lift there is, the closer they come to the piston, when the piston is near to top dead centre. Too much lift and they'll make contact - bad news! The solution is to cut pockets in the pistons, which in effect makes room to accommodate the extra valve lift.
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l33t corsa
Member
Registered: 14th Aug 01
User status: Offline
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Is compression affected with those pistons?
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Neshol
Member
Registered: 10th Jul 02
Location: Midlands
User status: Offline
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Cheers for that Andy
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