what do i need to do to fix the right mph? - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Firestate88

Member

Registered: 10th Jul 08
Location: Northampton England
User status: Offline

12th Mar 10 at 20:12

well i've only gone and brought lower profile tyres than factory (my tyres 195/45 and factorys 205/50)
is there anywhere of fixing this so 70mph on the clock is 70mph on the road? atm 70mph on the clocks is about 62 - 64mph

its a mk4 1.8 astra btw (z18xe)

sri_baby

Member

Registered: 17th Feb 08
User status: Offline

12th Mar 10 at 20:17

to b honest bud ur speedo isnt aways rite anyway there always a little bit out but im not sure if theres anyway of sorted it, sumone on here should no

Firestate88

Member

Registered: 10th Jul 08
Location: Northampton England
User status: Offline

12th Mar 10 at 20:50

i know its always little bit out, but its alot out and hopefully it can be sorted if anyone knows how?

Firestate88

Member

Registered: 10th Jul 08
Location: Northampton England
User status: Offline

13th Mar 10 at 10:04

any1?

AlexW

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Registered: 25th Oct 08
Location: Essex
User status: Offline

13th Mar 10 at 10:31

Bugger all you can do.

Just live with it.

grez12

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Registered: 30th Aug 08
Location: cleethorpes dn35
User status: Offline

13th Mar 10 at 10:36

quote:
Originally posted by AW06
Bugger all you can do.

Just live with it.

oceansoul

Member

Registered: 19th Jun 06
Location: Sunbury, Surrey
User status: Offline

14th Mar 10 at 12:55

As its a mk4 astra, you MIGHT be able to adjust the tyre size setting in the ecu using tech2. It can be done on Omega when bigger tyres/wheels are fitted, so MIGHT be same on Astra.

Firestate88

Member

Registered: 10th Jul 08
Location: Northampton England
User status: Offline

14th Mar 10 at 15:20

ah okies wicked thanks