964RS replacement trailing arm bushes
10-01-2008, 06:32 PM
#62
Burning Brakes
Join Date: Mar 2002
Location: WhippetWorld, .........is it really only this many
Posts: 1,081
Likes: 0
Received 1 Like
on
1 Post
The prototype bushes have just been fitted to Tony Taylor's 964 trackday special, in fact the car is still on the ramp having it's brakes serviced whilst we are there. We decided to test the harder track version of the bush first, hopefully TT will have a trackday soon so that he can report back on how they feel and drive in comparison with standard. I'll have prices in a few days and in the mean time will try to work out a special "bulk buy" deal for fellow Rennlisters, more soon.
My C2 is a trackday car and its running H+R Supercup suspension with monoball top mounts and currently rides on 18ins Toyo 888 so road refinement isn't the same as a standard 964C2.
On the road I haven't really noticed much difference; there "might" be a bit more of the road texture coming through but there is no great change in that respect. What I have noticed is that the suspension doesn't "crash" as much over small harsh bumps like pot hole edges etc. Coupled with the previously fitted RS front A arms the whole car seems to ride slightly firmer but more compliant
On track the rear wheels do feel more planted; I noticed more stability under braking into bumpy corners and a more predictable and secure feel when leaning on the rear tyres under power coming out of corners.
I'm actually quite suprised at the difference changing the front and rear rubber bushes has made. Car feels like new and gives more confidance to push hard; A bit too hard today as i had a spin. A picture paints a thousand words so they say so by way of explanation.
Last edited by tonytaylor; 10-01-2008 at 06:34 PM. Reason: felt like it
10-01-2008, 07:26 PM
#64
Rennlist Member
If the bushes do what the factory RS bushes did, the car should be more sensitive to lifting of the throttle mid turn when cornering at track speeds. The car should oversteer relatively more than the normal C2 bushes would but you should be able to catch it with reapplication of throttle.
10-01-2008, 08:18 PM
#65
Burning Brakes
Join Date: Mar 2002
Location: WhippetWorld, .........is it really only this many
Posts: 1,081
Likes: 0
Received 1 Like
on
1 Post
Some spring rates
H&R 964 springs (green)
Front 190-255 lbs/inch
Rear 220-265 lbs/inch
H&R 965 (Turbo) springs (red)
Front 250-270 lbs/inch
Rear 265-285 lbs/inch
H&R 964 Coil-over
Front 250-285 lbs/inch
Rear 265-285 lbs/inch
H&R 964 Super Cup
Front 455 lbs/inch
Rear 685 lbs/inch
Porsche Carrera RS springs
Front 250-308 lbs/inch
Rear 375-508 lbs/inch
10-01-2008, 08:28 PM
#66
Burning Brakes
Join Date: Mar 2002
Location: WhippetWorld, .........is it really only this many
Posts: 1,081
Likes: 0
Received 1 Like
on
1 Post
If the bushes do what the factory RS bushes did, the car should be more sensitive to lifting of the throttle mid turn when cornering at track speeds. The car should oversteer relatively more than the normal C2 bushes would but you should be able to catch it with reapplication of throttle.
go back to August last year at an airfield day and we just couldn't get the car to oversteer on a high speed corner and I've sort of been working on that principle ever since .... until now lol.
To be fair driving in that sort of weather on worn semi slicks was asking for trouble and I suspect today was just over application of throttle and it wasn't for being caught once it started, well not by me anyway. No harm done though.
10-02-2008, 08:10 AM
#67
Addict
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Thread Starter
Braver man than me Tony, I was undecided about coming in the first place but after taking one look out of the window in the morning I decided to leave the RS in the garage - over 400hp in these conditions on motorsport suspension is not my idea of "fun". Well done for braving the elements.
10-02-2008, 09:38 PM
#69
Addict
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Thread Starter
I don't see any reason why not. it's the same design of mounting as the stock 964 and RS.
We will be commissioning 20 car sets of these bushes tomorrow, expected delivery in 2-3 weeks. I anticipate shipping half of these across the Pond in one box for the group buy - so anyone who expressed an interest in the thread is likely to get a PM early next week to confirm their orders.
We will be commissioning 20 car sets of these bushes tomorrow, expected delivery in 2-3 weeks. I anticipate shipping half of these across the Pond in one box for the group buy - so anyone who expressed an interest in the thread is likely to get a PM early next week to confirm their orders.
10-02-2008, 09:46 PM
#70
Rennlist Member
10-05-2008, 05:07 AM
#72
Drifting
The kit is just for replacing the "big bushing" in the rear traling arms, the price looks like £195 plus shipping, and I guess the price will be the same regardless of version. Maybe a Swedish group buy ;-)
10-05-2008, 09:48 PM
#74
Addict
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Thread Starter
The group buy price for this initial batch of 20 car sets is £170 excluding VAT and shipping, more than happy to cover all our Scandinavian friends in this offer.
