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Author What gear box for a c20xe
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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2nd Jun 10 at 18:11   View User's Profile U2U Member Reply With Quote

depends what rolling radius of wheel and tyre is tbh. 137mph is on 14" wheels with 185 60 14's i do believe as std.
Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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2nd Jun 10 at 18:13   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Nic Barnes
depends what rolling radius of wheel and tyre is tbh. 137mph is on 14" wheels with 185 60 14's i do believe as std.


On what car??Cav/Calibra/Mk3 Astra all came with 15s as standard.
Nic Barnes
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Location: nowhere near ginger people
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2nd Jun 10 at 18:15   View User's Profile U2U Member Reply With Quote

mk2 didnt.
Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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2nd Jun 10 at 18:19   View User's Profile U2U Member Reply With Quote

IIRC the MK3 Gsi had a 55 profile tyre on the 15s and also had a top speed of 137.
Nic Barnes
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Location: nowhere near ginger people
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2nd Jun 10 at 18:23   View User's Profile U2U Member Reply With Quote

like i said rolling radius.
Corsa_Sport21
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2nd Jun 10 at 18:24   View User's Profile U2U Member Reply With Quote

Which would probably be the same for a 14" wheel with a 60 profile tyre and a 15" wheel with a 55 profile tyre.
Nic Barnes
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2nd Jun 10 at 18:28   View User's Profile U2U Member Reply With Quote

also the width of tyre comes into. but whatever. rolling radius can affect max speed. so 137mph isnt the max speed on an f20. thats all i am saying.
Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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2nd Jun 10 at 19:03   View User's Profile U2U Member Reply With Quote

I know.All im saying is 140+ is a bit optimistic for the max real speed.

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