ALFAGTV6.COM

Mats · Post by **Mats** » Thu Oct 19, 2006 4:48 am

Bin the leaf springs and design a nice four-link with a watt or panhard to locate it sideways. Good to go.

Or do you have to have leafs because of regulations?

Good post btw, love the part about the Bilstein/Konis.

SydneyJules · Post by **SydneyJules** » Thu Oct 19, 2006 5:15 pm

Yeah I know ive being toying on like farkwit.

Thanks for putting me in my place Greg, Mats, Ben.

And screw you Daniel for encouraging the

in me! You should know better

TS Turbo- Ive seen Lotus sevens using Alfa gear before, but my Yr 12 Physics teacher who owned a PRB Clubman Replica said the fabricated IRS ones were quicker. I dont know myself

Possibly better, and cheaper to go with RS Racing setup and some good brakes - yes?

Post by **Zamani** » Thu Oct 19, 2006 6:36 pm

Guys,

The least of these cars' problem is the rear setup. It's the front that understeers like a pig. Although with the Beninca setup, drop spindles, I should hope to see some improved laptimes.

But yeah Jules, it's an interesting topic to discuss m8.

Daniel · Post by **Daniel** » Thu Oct 19, 2006 6:53 pm

Sorry Jules, I can't help myself. That bloody minded engineer in me comes out and wants to redesign things.

Good topic though.
Now what can we attack next ?

SydneyJules · Post by **SydneyJules** » Thu Oct 19, 2006 7:05 pm

Ok, Check this one out, then....

la_strega_nera · Post by **la_strega_nera** » Thu Oct 19, 2006 10:19 pm

Mats wrote:Bin the leaf springs and design a nice four-link with a watt or panhard to locate it sideways. Good to go.

Or do you have to have leafs because of regulations?

Good post btw, love the part about the Bilstein/Konis.

I have to stay with leafs because of the rules, but I can add locating links etc, so it'll gain something to take care of the leaf spring wind up (ideally sprung to help with brake hop), and either a panhard or a watts link... I'm leaning towards the panhard as I can set it up assymetrically so it will load the right hand rear better (the live axle naturally unloads the right rear under throttle).
I may even investigate a set of coposite leafs from the US, the improvement in unsprung weight is massive

The IRS sevens don't have the HP to reallly work the back tires hard, and because of their insanely lightwieght, the improvement in sprung to unsprung ratios makes a huge difference.

Things to redesign on the alfetta chasis cars? how about redesigning those stupid rear calipers so they can perform more than one handbrake turn between adjustments? Shift linkage? Front Suspension?

Mats · Post by **Mats** » Thu Oct 19, 2006 11:33 pm

Handbrake? You guys have handbrakes?

Ben, is there something in the rules that say you can't add springs? add some nice coil springs and a four link, then tremove the leaf springs and add som very thin pieces of strip steel to look like the leaf springs...

la_strega_nera · Post by **la_strega_nera** » Sun Oct 22, 2006 4:41 pm

Mats wrote:Handbrake? You guys have handbrakes?

Ben, is there something in the rules that say you can't add springs? add some nice coil springs and a four link, then tremove the leaf springs and add som very thin pieces of strip steel to look like the leaf springs...

The wording pretty much says no to that... The Flex-a-form fiberglass leafs are the go (they're probably as light as coils), and if i do stuff like float the front spring eye it will let a 3 link do its thing (3 links don't bind up in roll like a 4 link). Rules are fun to work around

TS_turbo · Post by **TS_turbo** » Mon Oct 23, 2006 11:14 am

camber compensating IRS ... verry interesting no much camber change during drop or bump exept static , ideal for rear end

la_strega_nera · Post by **la_strega_nera** » Mon Oct 23, 2006 5:15 pm

TS_turbo wrote:camber compensating IRS ... verry interesting no much camber change during drop or bump exept static , ideal for rear end

I'm not 100% convinced on the dax system... I'd be interested to see the roll centre migrations etc. Besides, you do want some camber gain in roll during cornering to compensate for tire carcass roll.

twinspark6 · Post by **twinspark6** » Fri Oct 27, 2006 7:09 pm

flex o forms are good. Although many people would argue. I know a few guys that use them and love them. I also know someone who broke one.
Why not use a QA1 adjustable shock and coilover type set-up with either existing leaf spring or flex o forms.
I decided not to use composite springs but did order belltech springs. 2" drop and did not suffer ride quality. I'll have some pics for you here soon Ben

la_strega_nera · Post by **la_strega_nera** » Fri Nov 03, 2006 10:44 am

twinspark6 wrote:flex o forms are good. Although many people would argue. I know a few guys that use them and love them. I also know someone who broke one.
Why not use a QA1 adjustable shock and coilover type set-up with either existing leaf spring or flex o forms.
I decided not to use composite springs but did order belltech springs. 2" drop and did not suffer ride quality. I'll have some pics for you here soon Ben

QA1? I wouldn't use them in a pink fit! Why bother when I've got a pair of digressive Bilstein coilovers sitting in a cupboard (as well as the set of custom valved Billies on the car)? I've thought about stripping back to a single leaf and running a coilover, but the rulebook specifically prohibits that

The broken spring thing is what makes me nervous about the flex-a-forms, but i guess if i've got the axle located well enough its less of a problem.
Never heard of Belltech?

Post by **Zamani** » Fri Nov 03, 2006 11:20 am

Ben m8,

Did I sell you my upside down bilsteins for La_strega_nera? Can't remember...

la_strega_nera · Post by **la_strega_nera** » Fri Nov 03, 2006 7:22 pm

Zamani wrote:Ben m8,

Did I sell you my upside down bilsteins for La_strega_nera? Can't remember...

Yep, they were a world better than the konis she used to run.