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Posted: Mon Jul 23, 2007 7:56 pm
by StanTheMan
The palace i went to didn't say he had any issues.......but i'm running about -2.5 deg camber. I've only done a few hundred K'm at best since then. But i do recall someone having a severe bitch about these. Next day the post had been edited.
If your'e not running big camber on these.....no point having them. The reason I got these is (rightly or wrongly) was to have aggressive camber without having to compromise Castor.
Posted: Mon Jul 23, 2007 8:56 pm
by irwin83r
i was told if the person doing the alignment wasnt carefull the offset pin could spin/rotate in the bush. having a reverse affect on the align-ability of the camber...
they then went on to say that to correct this they would have to remove the bush/pin and reset it
id be tempted to try some other methods first though... maybe a pinch bar or a jack to pull the arm away from the center of the car and hopefully spin the bush back to where you want it... but that could put strain on things you wouldnt want to..
Posted: Mon Jul 23, 2007 10:13 pm
by StanTheMan
Getting the pin out is a piece of cake.......compared getting out the old bushes
But still a fair bit of work involved
Posted: Mon Jul 23, 2007 11:23 pm
by StanTheMan
speaking of massive & excessive camber
Massive camber FTW.
this is those offset bushes dialed out to the max...... have to admit.....it was a handful to drive.
yes I also admit If i was to get the bushes again.....I wouldn't bother with the offset camber set. For a road car there is absolutely no point.
I guess you live & you learn.
same with various alignments I've had where -1.75 deg was still wearing the outside of my tyres.
as far as my current wheel alignment's goes..... The jury is still out. It certainly feels much better & much more stable than the home driveway alignment I did.
( now there is a surprise). But Putty road is looming.
Posted: Mon Jul 23, 2007 11:42 pm
by StanTheMan
and thats not photo chopped either.
here is something else for your amusement.
Seriously Dodgy
Posted: Tue Jul 24, 2007 1:47 pm
by manga_blue
Centreline in Melbourne did my alignment. It took over 2 hours.
Every time we loosened an adjusting bolt the bush would turn in its hole. This happened whether we had the weight on or off the wheels, though weight off was slightly better.
There was no possibility of fine control. The only way we could get anywhere near what we wanted was hit and miss.
Glenn said that in his experience eccentric bushes are normally fitted to the upper arms so that these remain locked while you do the adjustments on the bottom arm. He couldn't understand why this was different for the MX5. This was one of the worst alignment procedures he'd ever had to do.
In the longer term I can't see anything that could positively hold the bushes in position. Apparently they mostly (but not always) stay in place when on the top arms because there's not much load there, but the bottom arms have to take the full weight of the car through the springs.
While the poly bushes themselves are great I really regret buying the eccentric bushes. I already had more aggressive settings with standard bushes and it was just too hard to get back to them with these beasts.
Re:
Posted: Tue Jul 31, 2007 8:38 pm
by irwin83r
RaceSupplies wrote:From experience on these cars (helping set-up at least 2 track dríven MX5's), and having seen the effects of certain alignment specs, as well as get feedback on them, i can tell you that sort of neg camber is probably excessive.
The last time we aligned my friends turbo NA6, he wanted to dial in copious amounts of neg camber because he thought surely it would be better, but after doing a track day, i asked him how it felt. He certainly agreed he had gone too far with it.
Even before that, we aligned another friends NB a few times. He went with the same sort of specs, big neg camber, large amounts of toe in on the rear, big toe out on the front.
He dialled out the neg camber, went with as much as he could get on the front (about 1.5 degrees with lowered PSS9's), and set it to the same on the rear. 3-4mm total toe in on the rear and about 2mm total out on the front. That was set based on experience from a few people who race their MX5's in prod sports. Worked a treat! He has since changed to a torsen centre, and may change soon to a Guru centre, but the alignment has stayed the same. Predictable, doesn't chew tyres, is fast and fun.
Just how it should be!
toe out on the front?? you wouldnt happen to have the spec sheets of that alignment would you?
im pretty happy where mine is now but am always willing to give different settings a go.
at the moment im toe in front zero toe rear.
Posted: Wed Aug 01, 2007 12:18 am
by StanTheMan
Toe out on the front gives better turn in but the car will have tendency to tramline.
Also your tyre wear will be harder.
I personally prefer a little toe out. Last alignment was zero........It felt a little lethargic to me
Posted: Wed Aug 01, 2007 2:36 pm
by manga_blue
I used to have a bit of toe-out and the car felt much sharper but the tyres were disappearing at an alarming rate.
The best thing about a lot of toe-out is that you can do wolf-whistles on tram tracks. Just run a front wheel onto and off the track for a sec at the right speed. With a bit of practice you can get it almost perfect.
