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Author Omega 88mm Piston rings - part 3520
Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
User status: Offline
3rd Feb 05 at 13:22   View User's Profile U2U Member Reply With Quote

Ah I see thus changing the power band safely kinda thing?
Stu_22
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Registered: 25th Mar 02
Location: Luton
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3rd Feb 05 at 13:22   View User's Profile U2U Member Reply With Quote

Allowing vales to open more
Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
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3rd Feb 05 at 13:23   View User's Profile U2U Member Reply With Quote

So VTEC will have deep pocket pistons as standard?
Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
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3rd Feb 05 at 13:23   View User's Profile U2U Member Reply With Quote

Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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3rd Feb 05 at 13:25   View User's Profile U2U Member Reply With Quote

i belive the vtec system revs higher as it has variable lift controlled by oil pressure, at certain revs the oil pressure increases shooting a metal rod through a locating hole which locks into place causing a redundant valve to start working which has bigger lift
Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
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3rd Feb 05 at 13:27   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Greasemonkey
i belive the vtec system revs higher as it has variable lift controlled by oil pressure, at certain revs the oil pressure increases shooting a metal rod through a locating hole which locks into place causing a redundant valve to start working which has bigger lift


So I was miles off then

But on a normal non VVT type engine my statement at the top is correct.
Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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3rd Feb 05 at 13:29   View User's Profile U2U Member Reply With Quote

the pockets them selves wont change the power band, but fitting cams with higher lift and having pockets to accomodate this lift will shift the power band yes, its only safe if ya engine is built to rev high, ie fit arps, steel rods, etc etc the higher the revs the more expensive it gets
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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3rd Feb 05 at 13:29   View User's Profile U2U Member Reply With Quote

nope.....

just allowing more air/fuel in..... but the valve is open for shorter times, meaning you have to rev faster to get all the 'potential' air in
Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
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3rd Feb 05 at 13:31   View User's Profile U2U Member Reply With Quote

I think I understand, I knew what I meant greasemonkey/ak thanks
3CorsaMeal
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Registered: 11th Apr 02
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3rd Feb 05 at 14:19   View User's Profile U2U Member Reply With Quote

i had pocketed y-fronts once and u'd lose your willy inside them
Andy
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Registered: 28th Dec 99
Location: Cumbria, UK
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3rd Feb 05 at 14:34   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Adam Kindness
bloody engines,

call from wallace perf....

Still waiting for 1 piston..... as Omega will NOT sell 1 piston and 4 ring sets.... they will only see 4 complete pistons with rings!!!

anyone know anywhere at all that would have a ring set for Omega 3520 88mm pistons???

[Edited on 03-02-2005 by Adam Kindness]


'Kin ell - this is exactly what I need - 1 Omega piston and 4 ring sets (albeit 80mm size). I'm getting on the phone to SBD now, but am prepared for bad news...
3CorsaMeal
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Registered: 11th Apr 02
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3rd Feb 05 at 14:44   View User's Profile U2U Member Reply With Quote

find two other people and get a set between u
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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3rd Feb 05 at 15:35   View User's Profile U2U Member Reply With Quote

Good News, and to wallace

I think them phoning Omega over and over from diff lines etc has got there bums in gear! They are starting production of those rings again

they will be back in touch asap with a timescale for production/delivery

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