CDTi Auto Optimum Cruising RPMs

[drewesq]

Originally Posted by JediWookie

Haven't done the egr bypass yet, but I did remove a tonne of gunge and clean up the egr when I fitted some Viton O-rings a few months back. Does the egr bypass really make that much difference? I know the theory behind why it's supposed to make a difference, but in reality, does it actually make a difference?

All I will say is it feels like it is quicker <2000rpm but from what I have read on my other thread http://www.the75andztclub.co.uk/foru...d.php?t=153229 it may just be placebo....?! :P

[drewesq]

Originally Posted by Heddycdt

That's the same as mine with the 215/55/16's but with the 195/65/15 (also standard fitments) The speedometer was 9mph over reading, so a little closer to actual speed I think

Is this the sort of thing that can get worse over time otherwise it must have left the factory like this? I guess they must allow for differences when they sell one 75 with 15" wheels and ones that have bigger wheels?

[MrDoodles]

Sadly yet another victim of Project Drive!

As I believe that the original cars fitted with 15" wheels had 205 section tyres fitted to them for that very reason!


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[drewesq]

Originally Posted by MrDoodles

Sadly yet another victim of Project Drive!

As I believe that the original cars fitted with 15" wheels had 205 section tyres fitted to them for that very reason!


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What are section tyres?

[MrDoodles]

Originally Posted by drewesq

What are section tyres?

The section is the width at the tread, in that example, 205 mm.


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