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Author Compression
daymoon
Premium Member

Registered: 1st Aug 08
Location: Selby, North Yorkshire
User status: Offline
28th May 10 at 11:42   View Garage View User's Profile U2U Member Reply With Quote
I need some help to convert psi preassure into xx:1 compression..

in my manual it says :




what would be stadard compression ratio would be then?
ed
Member
Registered: 10th Sep 03
User status: Offline
28th May 10 at 11:54   View User's Profile U2U Member Reply With Quote
You can't calculate the compression ratio from that data. The compression ratio is a calculation of the volume of the cylinder when the piston is at bottom dead centre in comparison to when it's at top dead centre. The data ought to be in the manual, what engine is it?
daymoon
Premium Member

Registered: 1st Aug 08
Location: Selby, North Yorkshire
User status: Offline
28th May 10 at 12:14   View Garage View User's Profile U2U Member Reply With Quote
G13K is the engine code.

looked through manual and cant find compression ratio, and everywhere on forums poeple go on about compression with vitara low comp pistons grrr
ed
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Registered: 10th Sep 03
User status: Offline
28th May 10 at 12:17   View User's Profile U2U Member Reply With Quote
Wikipedia says 8.3:1 to 9.8:1.
daymoon
Premium Member

Registered: 1st Aug 08
Location: Selby, North Yorkshire
User status: Offline
28th May 10 at 12:20   View Garage View User's Profile U2U Member Reply With Quote
it's actually 10:1 as i just read on forums...

there were 8v models, with lower compression...
ed
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Registered: 10th Sep 03
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28th May 10 at 12:21   View User's Profile U2U Member Reply With Quote
The 8.3:1 would be the lower power version with a carb and the 9.8:1 would be the higher power fuel injected version, I'd say.
daymoon
Premium Member

Registered: 1st Aug 08
Location: Selby, North Yorkshire
User status: Offline
28th May 10 at 12:22   View Garage View User's Profile U2U Member Reply With Quote
yeah that makes sense..

trying to find some pistons for my engine and struggling big time either low compression like 8.0:1 or high like 11,5:1...
ed
Member
Registered: 10th Sep 03
User status: Offline
28th May 10 at 12:43   View User's Profile U2U Member Reply With Quote
You'd probably have to go down the route of getting the high compression pistons and modifying them or having some custom ones made.

 
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