Discussion
The car is a T350c with a 4.3 conversion, so closer to Sagaris power than T350.
Originally the T350 was designed with 225/50r16 (632mm diameter) all round. The shift to 18” wheels was apparently more fashion than function lead and if you believe the history they were meant to have 235/40r18 (645mm diameter) all round but they rubbed at the front so fronts ended up as 225/35r18 (615mm diameter).
The Sagaris is always quoted as being much more planted that the T350. The major differences seem to be much stiffer springs and better quality dampers, 50mm on the track, better aero with splitters and guerney, and 255/35r18 all round.
I would like to make the T350 as planted as a Sagaris. I can sort out the dampers and spring rates and the aero, but I’m thinking about wheels and tyres.
Would it make sense to put 245/35r18 (629mm diameter) all the way round? They will fit at the back but might take a little fettling at the front for width.
Has anyone ever tried this combination are if so were you happy with it?
Originally the T350 was designed with 225/50r16 (632mm diameter) all round. The shift to 18” wheels was apparently more fashion than function lead and if you believe the history they were meant to have 235/40r18 (645mm diameter) all round but they rubbed at the front so fronts ended up as 225/35r18 (615mm diameter).
The Sagaris is always quoted as being much more planted that the T350. The major differences seem to be much stiffer springs and better quality dampers, 50mm on the track, better aero with splitters and guerney, and 255/35r18 all round.
I would like to make the T350 as planted as a Sagaris. I can sort out the dampers and spring rates and the aero, but I’m thinking about wheels and tyres.
Would it make sense to put 245/35r18 (629mm diameter) all the way round? They will fit at the back but might take a little fettling at the front for width.
Has anyone ever tried this combination are if so were you happy with it?
Well, perhaps a bit more, but I didn't want to upset anyone...
I'm quite happy doing the height, corners and geometry myself. Do my 911 outlaw which is spot on so have a good understanding of the subject and a good system. The TVR is a new challenge but I'm sure I will get there. It's part of the fun of it all.
It's the tyres I need help with. If I could run Sagaris 255/35r18 all round I would as it's the Sagaris I'm trying to emulate, but I can't as they don't fit, so hoping I might get away with 245/35r18. Hoping that someone has tried it before and can either confirm it works or prevent me from making a horrible mistake
I'm quite happy doing the height, corners and geometry myself. Do my 911 outlaw which is spot on so have a good understanding of the subject and a good system. The TVR is a new challenge but I'm sure I will get there. It's part of the fun of it all.
It's the tyres I need help with. If I could run Sagaris 255/35r18 all round I would as it's the Sagaris I'm trying to emulate, but I can't as they don't fit, so hoping I might get away with 245/35r18. Hoping that someone has tried it before and can either confirm it works or prevent me from making a horrible mistake
Thanks for that.
I'm definitely not in the too low camp. Keeping it high stops the scraping and helps some of the geometry challenges as you say. The car is also sitting on 400/350 springs rather than the standard 200/175 which I think is going to improve the rubbing issue a little over the softer cars.
The tennis ball trick sounds like a great one. I think I might just go with the 245's all round and get the glassing kit out.
Thanks for the help.
I'm definitely not in the too low camp. Keeping it high stops the scraping and helps some of the geometry challenges as you say. The car is also sitting on 400/350 springs rather than the standard 200/175 which I think is going to improve the rubbing issue a little over the softer cars.
The tennis ball trick sounds like a great one. I think I might just go with the 245's all round and get the glassing kit out.
Thanks for the help.
Basil Brush said:
My experience is from a Tuscan not T350, but chassis etc is all the same underneath.
Don't go for the Sag steering arms in isolation unless you are also going to raise all the wishbone pivots by 20mm as the Sag has. The later cars aren't that far out.
225/40 front 255/35 rear works well on Tuscans. The choice of 255/35 all round on the Tuscan S and Sag may have been as much down to looks as performance.
Great advise. Thank you. Mine is an early T350C, late 2002. I was going to keep it reletively high at the front to try to mitigate the bump steer issues.Don't go for the Sag steering arms in isolation unless you are also going to raise all the wishbone pivots by 20mm as the Sag has. The later cars aren't that far out.
225/40 front 255/35 rear works well on Tuscans. The choice of 255/35 all round on the Tuscan S and Sag may have been as much down to looks as performance.
I had the same bump steer issues on the 911 outlaw which is a bit low. Got a set of simple bump steer correctors which sorted the issue out very well. I take it the issue is a bit more complex on these things.
https://www.stuttgart-classica.co.uk/suspensionste...
non_linear said:
Check the rack is shimmed up as high as it will go as well. I like the bump steer adjuster you linked to. I was looking at alternative track rod ends with different mounting shaft length, but these adjustable ones look a good idea.
I had the Sag gurney on my T350 but took it off as I prefer the original look. I haven't noticed any change in performance, but maybe I'm not pushing it hard enough.
If that guerney is gathering dust in a corner and you want to move it on I would love to try one. Happy to grease your palm with silver...I had the Sag gurney on my T350 but took it off as I prefer the original look. I haven't noticed any change in performance, but maybe I'm not pushing it hard enough.
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