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Author Topic: Can someone help with diagnosis  (Read 1092 times)

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dave the builder

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Re: Can someone help with diagnosis
« Reply #60 on: 11 September 2019, 05:54:36 »

Offset, wheel width and tyre size ;)

Manual lists suitable wheel and tyre sizes ;)
The manual lists a broad range of tyre sizes, from 195/65 R 15 to 225/45 R 18, together with tyres pressures for many load options. The only mention of wheels is the tightening torque of 110Nm. Winter tyres size 235/35 R 19 are also possible.
195/65 R15  ET35 steel wheels (omega spares) is the tyre/wheel size I said would fit on another thread

It's also the standard size for Astra H base models

as for offset ,it's measured in MM so look at a list of wheel and tyre sizes for vectra ,omega  ,astra

https://www.wheel-size.com/size/opel/vectra/2008/


I ran Wolfrace 7J ET35 with 195/65 R15 (Vectra spec wheels/tyres) on my carlton for 2 years ,no handling or tyre wear issues

I did also say on whatever other thread it was, that Terry should check what wheels he had , not just "fit what you like"
tyre size , age and condition should be checked I agree


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terry paget

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Re: Can someone help with diagnosis
« Reply #61 on: 11 September 2019, 09:37:03 »

Page 204, in a box in the middle column :-X
In my Vectra manual page 204 is about automatic level control, and has no box in the middle column. Manuals must differ I suppose.
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Doctor Gollum

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Re: Can someone help with diagnosis
« Reply #62 on: 11 September 2019, 09:53:35 »

Page 204, in a box in the middle column :-X
In my Vectra manual page 204 is about automatic level control, and has no box in the middle column. Manuals must differ I suppose.
It's the first page after Brakes, possibly 8 pages further on from Level Control :y (August 2005)

Semantics over page numbers won't change my, or the printed, point...
« Last Edit: 11 September 2019, 09:55:13 by Doctor Gollum »
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terry paget

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Re: Can someone help with diagnosis
« Reply #63 on: 11 September 2019, 10:06:45 »

I was persuaded of the possiility of fitting Omega wheels on this Vectra by Nick's excellent lesson and other comments in this recent thread. http://www.omegaowners.com/forum/index.php?topic=145530.0. I do not wish to do anything unsafe, risky or illegal. I was considering buying Vectra C wheels to improve the ride of this Vectra. I have 2 sets of wheels removed from Omegas I have scrapped in the last two years.
I thank you all for your concern and advice.
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terry paget

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Re: Can someone help with diagnosis
« Reply #64 on: 11 September 2019, 10:16:35 »

Page 204, in a box in the middle column :-X
In my Vectra manual page 204 is about automatic level control, and has no box in the middle column. Manuals must differ I suppose.
It's the first page after Brakes, possibly 8 pages further on from Level Control :y (August 2005)

Semantics over page numbers won't change my, or the printed, point...
Got it, p. 211. 'Warning. Use of unsuitable tyres or wheels may lead to accidents and make the vehicle unroadworthy'
Who would argue with that?
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Doctor Gollum

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Re: Can someone help with diagnosis
« Reply #65 on: 11 September 2019, 10:32:47 »

 ;)
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terry paget

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Re: Can someone help with diagnosis
« Reply #66 on: 11 September 2019, 14:34:55 »

Terry had 225 wide tyres fitted anyway from his post above
the offset difference is tiny
rolling radius is within the scope of the 9mm tyre wear possibility

calculator here clicky

Terry get the actual offset that is stamped on the wheels and width of wheel 7J  :-\  :y

I doubt Terry will be pushing the car hard enough for any geometry issues on a 11 year old car ,pottering about  ::)
Cast on the inside of the wheel spokes is the following data:
Omega 16" wheel:
7JX16H2
ET32
STTTK1 (all Tbars joined)
GM many times

Vectra 17" wheel:
7JX17H2 ET41
1411
Si7
13183227
Made in Poland
GM
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aaronjb

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Re: Can someone help with diagnosis
« Reply #67 on: 11 September 2019, 15:34:37 »

So the difference between the two meaning that the Omega wheel will sit 9mm further out from the center of the car. What that does to scrub radius and the rest of the suspension depends entirely on what the scrub radius etc looked like to begin with (it could be better, it could be worse).. (Scrub radius being a function of how far the steering pivot is from the theoretical 0-line of the wheel; maybe it's at a 41mm offset, meaning the Vectra wheels had a 0 scrub radius to begin with, or maybe it was a compromise already..)
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Doctor Gollum

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Re: Can someone help with diagnosis
« Reply #68 on: 11 September 2019, 16:08:30 »

Also has an impact on how the hub is loaded...
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terry paget

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Re: Can someone help with diagnosis
« Reply #69 on: 11 September 2019, 18:59:44 »

Dave the builder's chart above recommends 7Jx16 ET36 wheels for the Vectra. I have fitted 7Jx16 ET32 wheels, ex Omega.
Dave's chart recommends 4 different tyre sizes, 195/60R16, 205/55R16, 215/50R16 and 225/50R16. My Omega tyres are 225/55R16, a bit big for the Vectra, which I calculate will give a rolling circumference 3% bigger than original, and therefore a 3% under-read in speed and mileage. As speedometers usually have 5% flatter, mine will still read fast.
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STEMO

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Re: Can someone help with diagnosis
« Reply #70 on: 11 September 2019, 19:37:26 »

My thread is in tatters. No one even remembers my original question. Boo hoo  :'(
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Sir Tigger QC

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Re: Can someone help with diagnosis
« Reply #71 on: 11 September 2019, 19:52:25 »

My thread is in tatters. No one even remembers my original question. Boo hoo  :'(

A bit like my Rain Sensor thread Uncle STEMO, where all they wanted to talk about was headlights.  :-\

When I wanted to talk about headlights they didn't want to know!  :'(

Bastards!  :D  ;D
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STEMO

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Re: Can someone help with diagnosis
« Reply #72 on: 11 September 2019, 20:04:15 »

My thread is in tatters. No one even remembers my original question. Boo hoo  :'(

A bit like my Rain Sensor thread Uncle STEMO, where all they wanted to talk about was headlights.  :-\

When I wanted to talk about headlights they didn't want to know!  :'(

Bastards!  :D  ;D
Brexit is one thing, but thread drift really boils my piss!  >:(


 ;D
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Lizzie Zoom

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Re: Can someone help with diagnosis
« Reply #73 on: 11 September 2019, 20:11:58 »

My thread is in tatters. No one even remembers my original question. Boo hoo  :'(

Well it started off about your wife's car droning.

I've been accused of droning on, so it couldn't be your wife doing that? ??? ???

There you are STEMO, I have single handedly got your thread back on track after 5 pages! :P :P ;D ;D ;) ;D ;)
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dave the builder

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Re: Can someone help with diagnosis
« Reply #74 on: 11 September 2019, 22:02:35 »

Do you really want reminding that you had that massive bill for a wheel bearing Uncle Stemo  :-\
and all the money spent on round black things  :-X
is she still making annoying noises and what news of the Astra  :D
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