Anyone know the Sag's fron / rear spring rates?

[jellison]

I need these on mine!:lick:

[trackcar]

.. bit more to it than that Jon ..

[jellison]

Doubt most of the people on here would know in anycase.

If you get a shit hot damper from Nitron, Ohlins, Lead etc (right length for the car and weight from the manufacture) then it is only trying springs out and seeing what works best - spring s are cheap as chips.

It is not rocket science.

[trackcar]

you're right, it's not rocket science .. but what you suggested is already more scientific than just asking for the same springs as on a sagaris cos you like the way that car handles ..

[jellison]

Doing a huge amount of research on this.

Would be useful for comparison purposes to know the Sag's though.

[GreenV8S]

Given your experience, and the fact that your car is about a million miles away from any other Chimaera that has ever walked the earth, I would have thought you would just guess a stiffer setup based on past experience and then refine the handling until you liked it. Don't see much point pursuing Saggy settings etc unless you have a car that is very similar to a Saggy, which you don't?

[jellison]

God what have I started - yes getting some v. good dampers and have a very good idea now of what rates are going on them now, given my cars spec. Mine likely have a slightly stiffer front to rear split than most Tivs as I need the great tracion it has with the supersoft std chim500 ones, blar blar, anyway think there now anyway!

[RichardD]

The Autocar review (www.autocarmagazine.com/RoadTest_Summary.asp?RT=215253) stated

"...the springs are more than two times stiffer than any previous TVR’s and mark a radical change in suspension philosophy. The idea is that these stiffer springs allow far less body movement and provide much better high-speed control without any significant loss of traction or ride quality. "

and

"The Sagaris has shades of the Lotus Elise about the way in which it appears to seemingly glide over rough surfaces without upsetting its occupants."

impressive stuff

[jellison]

I agree - they are mega stiff - but still compliant in the damping - so a good bit if damper playing around to get the compromise right.

Guys I had a ride in and followed for 5 days was like a roller skate on it roll and turn in abilities - but still remarkably supple and not jarring in anyway at the same time.

Guy had had Tuscan S before and said it was a bag of crap as far as handling goes!

[tail slide]

Sag has 450 fronts 400 rears, with same rate anti-roll bars as T350 (ie. stiff but I don't know rate) but also benefits from longer and progressive repositioned bilstein bumpstops than T350.

You couldn't do much better than ask the guy who designed the T350 & Sag suspension, to set up yours, as he's now freelance - Neill Anderson
www.andersonautomotive.co.uk/

...and you thought no-one would know!

[GreenV8S]

tail slide said:

Sag has 450 fronts 400 rears

Assuming similar front/rear wishbone geometry (don't know if this is a good assumption) that seems to imply a relatively stiff rear setup relative to the fronts. Does it also have a massive ARB on the front?

[tail slide]

GreenV8S said:

Assuming similar front/rear wishbone geometry (don't know if this is a good assumption) that seems to imply a relatively stiff rear setup relative to the fronts. Does it also have a massive ARB on the front?

You're looking at all the right variables Pete!

On the T350 front spring/dampers are inclined at about 25 degress, rears at about 45, so effective spring rate of rears is a lot less than appears - I believe this is same on the Sagaris. A/roll bars on T350 and Sag are 1" dia front 3/4" rear, but don't know offhand if pickup points are the same relative front and rear. So appears conventional balance, if a little on the stiff side, but Neill advised that the Bilstein damper settings took a lot of development & the bumpstops are quite trick and start acting early.

[GreenV8S]

That is heading in the right direction, looks like wheel rates of roughly 370 lb/in front and 200 lb/in rear. Still looks well soft at the front, but if you allow for the effects of a nice hefty ARB it is not that far off. Quite high wheel rates actually, considering it's an ordinary road car.

[bugsy]

Gugi said to me that the Saggyass was the best handling TVR yet but still rolled a bit more than he would have liked.
Mind you I would have thought that he was set loose in the press car and we know what that means on the suspension front.

[jellison]

Ooh ya - Ohlins! All TG one have the specially setup pre-show.

Anyway thanks all - will check spring angle - but I bet the same.

I'll make mine stiff but maybe a bit down on Sag and slightly (raletive to the front softer than Sag) as I have a shed load more torque to unstick the rears.

Ta all.

[rev-erend]

I'd take a guess that you have more weight that the Sag too.. but could be wrong - guess only a weigh bridge or corner weigh guage (?) can do this..

[jellison]

www.ultimatecarpage.com/frame.php?file=car.php&carnum=2048

I think I'll be lighter - they look fat Chims but they really aren't - weighed on electronic bridge pre-swap on empty tank and only 1080kg - I guess she would be under 1110 know (race battery saved 7-8kg!).

Poly bushes (winter job) as well should have it in handling ballpark.