c2rsa
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Registered: 23rd Apr 06
Location: northumberland
User status: Offline
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At the moment i'm running a 2.0 16v engine on twin 45 carbs in my corsa, the engine needs to come back out and i was thinking about having the bottom end bored out to a 2.1 does anyone know if i'll get anymore performance if so how much
thanks
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GSi Ghost
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Registered: 15th Dec 05
Location: Stoke-on-Trent
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Jimmy 2.1 might be able to give you some info on that!
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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most folk saying they have a 2.1 dont....
To get a 2.1 (or close to it) you'll need a bore of 88mm.
Std bore and stroke is 86mm - 1998cc
88mm bore and 86mm stroke - 2092cc
I've had 2 blocks at 88mm.
1st - scraped due to scores in bore's
2nd - bored squint or something
At 88mm there is nothing left to repair.... the block is on its limit.
If i were you i'd go for a safe 2045cc with an 87mm bore or 2069cc with 87.5 max
why are you wanting to do this if you dont need a new pistons etc? The gains are not worth the outlay if the work isnt being done anyway
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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power is prob in the region of 5% per 100cc too
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c2rsa
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Registered: 23rd Apr 06
Location: northumberland
User status: Offline
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thanks for the advice
i was just wondering if it was worth while or not , but i take it its not worth the expense or the hassle
thanks
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Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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i always loved the old 2.1 16v engines that appeared to have completely std inlet manifold, exhaust manifolds and still use std management. im yet to find a std piston in 88mm size
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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if you are needing the bores honed, new pistons etc - do it.
If your just wanting to do it purely for power, and working with an OK engine- dont, just wait for it to pop
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phil_sutton
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Registered: 8th Sep 07
Location: Nottingham
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its going to give you naff all power, waste of time doing unless you actually need a rebuild in the first place and even then Id just go up one size. If you really want to increase the capacity then stroke, with about 3k you can get a crank and with the right pistons you can get about 2.3 ish.
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