piston size- sapph cossie help!
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piston size- sapph cossie help!
i neeed to rebuilt my engine soon . should i use std size piston or oversize? what oversize should i be using? .25? .50? or 1.0 ? also what is the advantage of using lower compression piston?
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It is not so much a choice of which to use, it will be determined for you due to bore wear, as to whihc size is needed, ie a re ring with the pistons that are in it at the moment, or if bores are worn, then a rebore with the next size up pistons/rings.
The advantage of lower compression pistons is if you want to run a LOT more power, with lower CR you can boost a lot harder.
tabetha
The advantage of lower compression pistons is if you want to run a LOT more power, with lower CR you can boost a lot harder.
tabetha
Thread Starter
Regular Contributor
Joined: Jul 2007
Posts: 325
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From: Singapore
Originally Posted by tabetha
It is not so much a choice of which to use, it will be determined for you due to bore wear, as to whihc size is needed, ie a re ring with the pistons that are in it at the moment, or if bores are worn, then a rebore with the next size up pistons/rings.
The advantage of lower compression pistons is if you want to run a LOT more power, with lower CR you can boost a lot harder.
tabetha
The advantage of lower compression pistons is if you want to run a LOT more power, with lower CR you can boost a lot harder.
tabetha
will that in any way affect turbo lag if i lower the CR ? also how will my current mapping be affected by the change of lowered CR and slightly oversize piston? thanks alot!
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