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Author Topic: Interesting Tyre Pressure Results  (Read 1858 times)

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Marks DTM Calib

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Interesting Tyre Pressure Results
« on: 23 September 2008, 08:26:34 »
Been playing with the tyre pressures and noting the mpg (over many runs).

Have now settled on the following which seem optimal from a handling and mpg perspective for a car driven on lots of motorway at speed.

36psi front and 36psi rear.
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cem_devecioglu

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Re: Interesting Tyre Pressure Results
« Reply #1 on: 23 September 2008, 08:45:12 »
Interesting..
36 psi.. Dont you feel the car is a bit jumpy ?
« Last Edit: 23 September 2008, 08:45:42 by cem_devecioglu »
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Marks DTM Calib

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Re: Interesting Tyre Pressure Results
« Reply #2 on: 23 September 2008, 08:48:10 »
Quote
Interesting..
36 psi.. Dont you feel the car is a bit jumpy ?

Nope, the average speed i do is 54mph (whole trip) and the above sets the front to load pressure and the back to a mid point (equal to teh front which maintains the balance quite well).

Increasing the backs further did make it more jumpy (not surprising as its not loaded) but the above seems the best compromise.

Lowering it increases the mpg quite a bit.
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cem_devecioglu

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Re: Interesting Tyre Pressure Results
« Reply #3 on: 23 September 2008, 08:51:22 »
Quote
Quote
Interesting..
36 psi.. Dont you feel the car is a bit jumpy ?

Nope, the average speed i do is 54mph (whole trip) and the above sets the front to load pressure and the back to a mid point (equal to teh front which maintains the balance quite well).

Increasing the backs further did make it more jumpy (not surprising as its not loaded) but the above seems the best compromise.

Lowering it increases the mpg quite a bit.

I will try tomorrow :y
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Mr Skrunts

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Re: Interesting Tyre Pressure Results
« Reply #4 on: 23 September 2008, 08:52:00 »
Quote
Quote
Interesting..
36 psi.. Dont you feel the car is a bit jumpy ?

Nope, the average speed i do is 54mph (whole trip) and the above sets the front to load pressure and the back to a mid point (equal to teh front which maintains the balance quite well).

Increasing the backs further did make it more jumpy (not surprising as its not loaded) but the above seems the best compromise.

Lowering it increases the mpg quite a bit.

Interesting findings.  Just had a look at the OOF flyers to see what the standard rateings are.  Your findings fit the average for the normal and full load rateings.

http://www.omegaowners.com/forum/YaBB.pl?num=1184621237/all

Scratch that, I only read the bottom ratings on the flyer and they were for the estate.  :-/


« Last Edit: 23 September 2008, 08:55:09 by skruntie »
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Marks DTM Calib

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Re: Interesting Tyre Pressure Results
« Reply #5 on: 23 September 2008, 09:07:02 »
They actually match the load speed settings for the front with the front pressures used on the back which keeps it balanced.

I should add that these are the results of 3000miles of trials and I have been running them for about 500 miles so far!

I suspect they would also suit an unloaded estate.
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JonArgraig

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Re: Interesting Tyre Pressure Results
« Reply #6 on: 23 September 2008, 09:07:59 »
Quote
They actually match the load speed settings for the front with the front pressures used on the back which keeps it balanced.

I should add that these are the results of 3000miles of trials and I have been running them for about 500 miles so far!

I suspect they would also suit an unloaded estate.

what did you find best for the MPG?
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Marks DTM Calib

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Re: Interesting Tyre Pressure Results
« Reply #7 on: 23 September 2008, 09:11:45 »
Quote
Quote
They actually match the load speed settings for the front with the front pressures used on the back which keeps it balanced.

I should add that these are the results of 3000miles of trials and I have been running them for about 500 miles so far!

I suspect they would also suit an unloaded estate.

what did you find best for the MPG?


The above was giving me 38.8mpg (65mph, 2.5V6 manual), any higher and the improvements were marginal but the car became to bouncy....hence the above compromise.
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cem_devecioglu

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Re: Interesting Tyre Pressure Results
« Reply #8 on: 23 September 2008, 09:11:57 »
Quote
They actually match the load speed settings for the front with the front pressures used on the back which keeps it balanced.

I should add that these are the results of 3000miles of trials and I have been running them for about 500 miles so far!

I suspect they would also suit an unloaded estate.

Phew..long experiment..I dont have this patience ;D
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Marks DTM Calib

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Re: Interesting Tyre Pressure Results
« Reply #9 on: 23 September 2008, 09:13:48 »
Quote
Quote
They actually match the load speed settings for the front with the front pressures used on the back which keeps it balanced.

I should add that these are the results of 3000miles of trials and I have been running them for about 500 miles so far!

I suspect they would also suit an unloaded estate.

Phew..long experiment..I dont have this patience ;D

When your doing 500 miles per week its easy to do.....plus I need a car that gives good mpg but, can still catch people out at roundabouts  :y

Beleave me, I would not want to compromise the handling!
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cem_devecioglu

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Re: Interesting Tyre Pressure Results
« Reply #10 on: 23 September 2008, 09:17:07 »
Quote
Quote
Quote
They actually match the load speed settings for the front with the front pressures used on the back which keeps it balanced.

I should add that these are the results of 3000miles of trials and I have been running them for about 500 miles so far!

I suspect they would also suit an unloaded estate.

Phew..long experiment..I dont have this patience ;D

When your doing 500 miles per week its easy to do.....plus I need a car that gives good mpg but, can still catch people out at roundabouts  :y

Beleave me, I would not want to compromise the handling!

 :o

Marks DTM..Thats a long distance ..I'm afraid your fuel costs are very heavy.. :-/
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Mr Skrunts

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Re: Interesting Tyre Pressure Results
« Reply #11 on: 23 September 2008, 09:22:45 »
As a matter of interest, what size are the tyres/wheels.  Cheers :y
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Marks DTM Calib

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Re: Interesting Tyre Pressure Results
« Reply #12 on: 23 September 2008, 09:30:03 »
225-55-16 (its a CDx)....not that the tyre size affects the Omega tyre pressures on the 16 inch and 17 inch rims and even thats only on the estate  :y
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Dazzler

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Re: Interesting Tyre Pressure Results
« Reply #13 on: 23 September 2008, 09:32:57 »
Will this not be classed as over pressure slightly and thus wear the centre of the tyre down quicker????
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Big jobbies now finished.....Now running on LPG

tunnie

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Re: Interesting Tyre Pressure Results
« Reply #14 on: 23 September 2008, 09:35:52 »
can't see why, its 40+ psi in the handbook for a fully loaded car.
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