Originally Posted by
Mike Rainbird
Dojj,
As an objective opinion, that is pretty much spot on
. Obviously if I had said that, I would have been shot down in flames being accused of belittling Rod's pet tuner's figures
.
you? shot down in flames?
i didn't know you wre a pilot as well
i told it like i read it, minus everything else that went on as it turned into something women would so, bitch and moan about stuff when they all get together
Originally Posted by
Mike Rainbird
Stu,
I think that you're being a little harsh, as although the rolling radius "should" be kept identical (for speedo accuracy etc), it is very rare that this happens.
The standard size tyre on the Sierras is 205/50x15 and the common upgrade is 215/40x17, which is an increase of almost an inch in diameter (and on the 2wds, lots of people fit 235/40x17s on the rear, which is nearly 2" bigger).
On the Escort, the standard tyre size was 225/45x16 and the common upgrade is 225/40x18, which is also an increase of almost an inch in diamter.
I think all he was trying to say is that these tthings can all have an effect.
i think i now understand the point stu was trying to make to nash but, if you have a bigger wheel, do you then make more or less power?
if it's judged by the torque figures, the bigger wheel will turn the roller with more torque at the same rotation, it'll just take longer to get there right? so even though the figures may be off, they shoudl still compensate to give you the right resluts?
i only say this because when i changed to the 3.14:1 diff and put big wheels (215/45/17) on the sierra, the top speed still stayed the same, but it was much quicker than my mates car who had more power, smaller wheels (195/50/15) and a 3.92:1 diff along the start finish straight at silverstone
how's that possible?
i had a dyno'd 124 lb/ft and 130 brake, he had 140+ lb/ft and 140+ brake
or was the dyno out due to the bigger wheels and diff combo on my car?