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Author Compression test.
LukeGSi
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Registered: 9th Dec 03
User status: Offline
7th Apr 05 at 19:38   View User's Profile U2U Member Reply With Quote
I shall be doing one at the weekend on the corsa, just out of curiousity and was just wondering how much compression is good for a GSi?
LukeGSi
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Registered: 9th Dec 03
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7th Apr 05 at 21:11   View User's Profile U2U Member Reply With Quote
willay
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Organiser: South East, National Events
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Registered: 10th Nov 02
Location: Roydon, Essex
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8th Apr 05 at 07:13   View Garage View User's Profile U2U Member Reply With Quote
not in the haynes manual ?
James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
8th Apr 05 at 11:16   View User's Profile U2U Member Reply With Quote
you want about 200psi across all, but make sure the engine is hot so go for a spin first.
do a dry and then a wet (5-10ml oil in each bore)
and see what the results are, and no more than a 10% diff across the cyl. 5% if you are tight.
X 60RSA
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Registered: 20th Aug 01
Location: Lincoln
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8th Apr 05 at 12:27   View User's Profile U2U Member Reply With Quote
Make sure you got plenty in ya battery!
LukeGSi
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Registered: 9th Dec 03
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8th Apr 05 at 20:10   View User's Profile U2U Member Reply With Quote
Will do, cheers folks
PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
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8th Apr 05 at 20:14   View User's Profile U2U Member Reply With Quote
9.5:1 for C16XE
10.5:1 for X16XE

I think...
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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8th Apr 05 at 20:48   View User's Profile U2U Member Reply With Quote
compression test doesnt give the ratios i dont think. unless its some fancy machine
James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
8th Apr 05 at 20:49   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by PaulW
9.5:1 for C16XE
10.5:1 for X16XE

I think...


11.0:1 C16XE

partly explains why it produces more power and torque imo.
PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
8th Apr 05 at 20:57   View User's Profile U2U Member Reply With Quote
my bad!

i was unsure if was 9.5 or 11...

doh

that and the slightly larger ports on the head...
James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
8th Apr 05 at 20:59   View User's Profile U2U Member Reply With Quote
not sure about the larger ports?
I know the shapes are different, if a little smaller on the C16XE, also the head on some X14XE's

 
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