285/75x16 Coopers on '92 80 series TD
Submitted: Friday, Apr 02, 2004 at 09:04
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mrdesmo
Time for new tyres, would like to go up to the 285/75x16 Cooper AT or ST (still undecided) from the 265's currently on at the moment.
A few questions....
My 80 suffers chronic turbo lag under 2000rpm, so the taller tyre would obviously effect the gearing (by 7% according to previous posts), anyone running the same tyre on the same car, whats your opinion in actual drivability...slip the hell outta the clutch?!
Any one know if this size tyre would be legal in SA for the 80 series?
Does anyone in
Sydney know where to get a good price? Matthews in 7 Hills quoted $288/tyre...
Thanks for any input...
Reply By: Member - Captain (WA) - Friday, Apr 02, 2004 at 10:29
Friday, Apr 02, 2004 at 10:29
I had 31" BFG tyres on my 80 series (non-turbo) and went to 33" BFG (same as 285/75R16). I found the gearing change a positive thing as it always had relatively low gearing.
But there was a HUGE difference in off-road performance. In WA beach sand, where I previously had my tyres down to 20 psi just to be able to get through, I was able to get through on 40 psi (a
test - not normal practise).
I changed to the 285/75R16 Cooper ST's when I got my GU and rekon they are better than the BFG T/A KO's IMHO (I previously had a great run with BFG's, but never found the KO series the same). I never found the change in gearing a problem on the GU (originals 265/70R16), in fact it was not noticeable (but I only did 35kms before changing the tyres!).
While you "may" notice a gearing change, I would not hesitate to change the tyres as the huge offroad performance gains more than outweighs it.
Cheers
Captain
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52917
Follow Up By: Member - Don (QLD) - Friday, Apr 02, 2004 at 10:52
Friday, Apr 02, 2004 at 10:52
Captain,
Which did you find to be noisier the BFG or Cooper St.
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Follow Up By: Member - Captain (WA) - Friday, Apr 02, 2004 at 11:09
Friday, Apr 02, 2004 at 11:09
Hi Don
The BFG TA KO's are quiet but the Cooper ST's are relatively noisy, not a problem at all, but you can notice them if listening out for it.
If the windows are up, you can hear the Coopers on smooth bitumen wheras rough bitumen is noisy regardless of tyre type and there is no real difference (Cooper tyre noise is from the wind on the lugs).
But given the noteably better off-road grip of the Coopers, I would not hesitate to go the Coopers again. Only thing is would go for the ST'c, which are supposedly better chip resistance. I have not had an issue wiith chipping, but would get them anyway.
One thing that really suprised me was that when driving on gravel, the BFG's really machined gunned the inner mudguards with stones, whereas the Coopers hardly pick up a stone in comparison, but have better grip at the same time!
Cheers
Captain
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Follow Up By: mrdesmo - Friday, Apr 02, 2004 at 13:37
Friday, Apr 02, 2004 at 13:37
GDay Captain,
Thanx for your reply, I believe the non turbo has lower gearing (diffs?) than the turbo model 80 series, I find even trying to get up steep driveways sometimes takes a bit of slipping the clutch with the standard tyres on, hence my question of drivability with larger tyres. I'm about to move house, and where we will be staying has a steep driveway/
hill to climb, so the right tyre choice now will save me clutch dramas later on!
Cheers
FollowupID:
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Reply By: Bob Y. - Qld - Saturday, Apr 03, 2004 at 20:19
Saturday, Apr 03, 2004 at 20:19
G'day Jeff,
We have 265's BFG AT's on 80 series multi valve, and it has plenty of lag, so haven't gone to bigger tyres. Previously, we had a 90 model 80 series turbo, with 31x10.5R15's on it, and it would really boogy, but at cruising speed, we were always looking for the next gear.
Suppose you could always fit an intercooler, to get some more grunt.
Good luck in the new job.
Hooroo...
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53098