I'm using a chronometer. Same for the Porsche before the Aston. The Aston is consistently 1 second slower than the Porsche was.
Don't think I've gained any weight :-)
My camber is stock (-1.5 degrees). The Aston corners well so I've never felt the need to change camber. Better to have more surface patch.
Could be the shift. The Porsche had a racing clutch, LWF and racing differentials, so shift times were faster.
Could be the shocks. The Porsche had a PSS10 suspension.
Probably just the difference between 4 wheels pulling the C4S and only 2 pulling the Aston.

 

It's physics. 911s have excellent acceleration because of their weight distribution. This is why their 0-60 always looks good in relation to their power/weight. Even if it had AWD, the Vantage wouldn't match the 911's acceleration.

 

 

Thanks 007, this is what I was looking for. :-)

 

If you track the car I would not install poly. It cold flows and will be ruined in no time under hard braking. The bore will elongate. It is fine for the street, but will require lubrication - it squeaks. I ran it on my Mustang for 20K street with no problems. Four track days and they were ruined. We switched to Delrin.

chr

 

Turns out there are no AMV8 kits for poly bushings anyway.
And the existing wheels are too pretty to replace, so I'll just use the car for it's intended purpose.


The spacers really help!

 

most of the bushings are standard size, you would have to take them out and measure them and order accordingly. It's a lot of measuring and quite a bit of labor, but it's the best way (Albright most work involved-. But no, there is not currently anyone that makes it. The mustang issue stated must have been cheap bushings with poor suspension geometry.

Tracked the living hell out of my M3s with power flex bushings, never squeaked (greased them heavily), never had any issues. Derwin transmits too much NVH to chassis for a refined car like an Aston Martin so polyurethane definitely better solution.

Another similar solution is on is getting adjustable camber arms and just adjusting those to a much more neutral (close to zero) camber.

Easiest step is just wider wheels & tires though

 

Not even close -

It is not a suitable material for track use in suspension components. It cold flows. UHMW is arguably better than Delrin, but harder to machine. People use Poly because it's cheap, stiffer than rubber, and can easily be swapped for OEM bushings. PowerFlex might as well be Energy Suspension.

IMO (lot's think not) they are great for a street vehicle. I never had a bit of trouble.

You'll find a lot of bushing information at Corner Carvers - take a look.

chr

 

You might find a switch to PS Cup 2's to give you more traction. I run them on my '15 V12VS and they make the car much less wayward under throttle than the OEM Corsas. Initially, I had though to try them out specifically for track days, but I am enjoying them just as much on the road and am now on my second set.

They ride firmly, but not unpleasantly so. They are probably noisy, but TBH I can't hear the tires over the sound of the decat...

To be clear, I don't do standing starts with the car (I doubt that would work terribly well with SSIII anyway) - I get my kicks from corners and at speed, and I don't think standing starts really suit the character of an Aston, but the Cup 2's might be worth trying if that's your thing.

 

Finally made it to the track (after switching to the twin plate clutch and AMR flywheel).
Lot's of fun, but cornering wasn't what I was used to.
I suspect I'll need 2 sets of wheels...
Has anyone done anything like this:
FROM:
Stock 2011 V8V
19" 20 Spoke Diamond Turned Wheels:
Front #9G33-1007-AB
Rear #9G33-1007-BB
STUD Pattern: 5 x 114.3
SIZE: 8.5JX19H2 ET50.3 (FRONT)
9.5JX19H2 ET62.5 (REAR)

TO:
8.5 x 19 offset 50.3 - > 9 x 19 offset 41 (inner 3mm MORE clearance, outer EXTEND 15mm)
245/40ZR19 Diameter 26.7” -> 255/40/ZR19 Diameter 27”
Wheel up 12.7mm, tire up 10mm (1.35mm less extended from rim)

9.5 x 19 offset 62.5 -> 11 x 19 offset 61 (inner 18mm LESS clearance, outer EXTEND 20mm)
285/35ZR19 Diameter 26.9” -> 325/30ZR19 Diameter 26.7”
Wheel up 38.1mm, tire up 40mm (.95mm more extended from rim)

Ric :-)

 

Can't help with the offsets, but going a lot wider in the rear and just 10mm in the front is likely going to cause more understeer. You probably want to go even wider in the front. You may rub some at full steering lock, but shouldn't be much of that on a track. I was recently looking at an old add for a TRG race car and it actually used a square tire setup with 305s all the way around. No idea how they made those fit in the front.

The Vantage is not light weight so is going to feel different than a lighter car.

 

Ric

I've got V12 wheels on my 07 V8V - they are very close to what you suggest - 9 front & 11 rear but im running standard 255/35 and 295/30 profile tyres on them

good luck sorting this out - like you said nice problem to have

Graeme

 

David,
You're probably right, but I don't think the front will mount a 9.5" wheel. Do you know anyone who has done this?
Graeme,
Do you know the offsets for the V12 wheels? I ask because it could solve the "inner 18mm LESS clearance" caused by mounting 11" wheels with offsets that extend the outer edge by 20mm (20+18=38mm=1.5").
OR if you could take a peek at the picture above and verify that your V12 rear wheels don't extend to the edge of the fender like mine with 20mm spacers.
Either way I would know that 11" with a 61mm offset is ok.

 

Ric

V12 stands at Front 19*9 offset 51mm and Rear 19*11 offset 68mm

hope that helps

I have 5mm spacers on front & 11mm on rear

Graeme

 

I would start out having someone film you from low to the rear and watch what the tires are doing,,
IRS cars typically camber change pretty hard in the rear under launch..
(It can be surprising if you use like a go-pro that can do the frame rate)
Just to see what is actually going on.. It may be caster as well as camber..
I've worked on several road race cars I had to add a caster control rod to keep the upright from rotating.
The rotation was making it so only about 1" of tire width was really touching the pavement. It was a combination of caster/Camber/Flex.

Oh and once I hooked it up,, I got to change the rear end because it actually HOOKED up and
blew the diff all over the track. (Nissan S12 with a lot of turbo.. ; ) ) It spun in first,, and when the driver hit second,, $$ happened.