Dakar...real action.
Submitted: Tuesday, Jan 12, 2010 at 17:26
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Member - Oldbaz. NSW.
What a great event this is & the coverage on SBS is superb. I was going to say
4WD event, but that isnt strictly true as some competitors are not . As one of
the minority on this
forum who favour higher tyre pressures, I was pleased to
note the comment from a leading driver that higher pressures had to be run
during the rocky stages. A quick google came up with the advice that cars run from 30 psi on sand to 60 psi on stones. This from BFG who have shod most of the winners for the last 10 years. Momentum is a factor of course, & these blokes have plenty of that. 4WD are not permitted to have auto pressure
adjustment & must choose tyre type at start of rally & not change it. Some
categories can carry two spares, others 4. Tyres are not specials..eg armoured.
Anyway, a great way to experience full on off road racing in a variety of vehicles.
If you havent caught it yet
check late afternoons on SBS or pay.....oldbaz.
Reply By: Crackles - Tuesday, Jan 12, 2010 at 19:36
Tuesday, Jan 12, 2010 at 19:36
Baz you've overlooked one critical point when comparing racing pressures with those of us who tour. Their speed!
They simply couldn't run a tyre at 25 PSI over rocks to minimise puctures then run at 150 KPH+ all day. It would either bottom out & smash the rim or overheat the tyre & shred it to pieces.
Same on the sand. They use their massive power to weight ratio to get over with higher pressures than what we would normally use touring, simply as they'd pop a tyre off every 2nd time they jumped over a dune if they let them down to 15.
Surely you're not suggesting we run 60 psi for the
Oodnadatta track & 30 psi for the Simpson on a touring vehicle just because BFG recommend those pressures on race cars that top 200 kph??? ;-)
Cheers Craig............
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Follow Up By: Member - Oldbaz. NSW. - Wednesday, Jan 13, 2010 at 11:30
Wednesday, Jan 13, 2010 at 11:30
G'day Craig, I cant see where I suggested anything of the kind, nor did I say BFG recomends any pressure. The site says Dakar 4WD are using those pressures as
a result of the teams experience in such events. I tried to make the point that
Dakar entrants obviously have less downtime with higher pressures, that is...less tyre damage. MMMmm...60 psi is a tad high for the Ood, but I wont be coming
under 40..:)))...cheers...oldbaz.
Ps. I dont get as many incoming rounds as I used to when promoting higher
pressures, think I have won a few over...:))). or are they just bored with it all ??
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Follow Up By: Crackles - Wednesday, Jan 13, 2010 at 20:45
Wednesday, Jan 13, 2010 at 20:45
Can't have it both ways Baz. You quote from the BFG site to back up your theory that higher pressures result in less punctures & now you contradict yourself by lowering their recommended 60 PSI for
rock down to 40!
You do seem to ignore the overwhelming evidence & examples given over the years like this
Tyre pressure guide People that see thousands of punctures a year would probably know better than you & I ;-)
Without exception, those that have chosen not to reduce tyre pressures on my outback trips have always had a far greater number of punctures & struggled in the sand.
Cheers Craig...........
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