G27-wheel alignment data´s from your cars?

[Comadis]

as there are several G27 cars on the market, i pressume all the owners have visited a wheel alignment centre to check the suspension geometry?
therefore some alignment protocols should exist and i´m interested in the following, determined parameters from your cars:

castor, camber and toe for front and rear axle, also the wheelbase on the right, also left side.

Edited by Comadis on Wednesday 16th September 18:45

[blitzracing]

I found the "factory" set up on the G33 miles out, (OK its not a G27- but same rules apply) so I started from scratch on toe in and camber, and its not so difficult. You start with the front wheels parallel, which will tend to make the car twitchy due to the lack of toe in. Then simply add say 2mm toe in on each wheel and see how it feels in a straight line. If its stable, then fine, but if not, add a bit more until it is, but no more. A typical wheel rim setting would be 3-4 mm per side. If you go too far, the car will scrub the tyres, and it becomes harder to change direction, as both front wheels will try and push a line towards the centre of the car. (That’s what aids the stability). The rear is similar (if its adjustable??), as lack of toe in will make the rear feel unstable, so same process. If you end up with tyre rubber dust on the rear body work you have gone too far, again about 3mm works for me. The G33's had huge rear toe in to try and compensate for the rear bushes not standing up the engine power, and causing the car to be very unstable, but with decent bushes this is not problem. As for camber, start with the wheels completely vertical, and go for a good run. Then run you hand across the tyre, and see which side is hotter (its likely to be the outside). Then add a few turns on each side to give some negative camber, and repeat the process until the tyre temp' is even. This is the best way for judging the best tyre contact area for maximum grip across the suspension movement. I found the G33 best at about -.5', so not a lot. The problem with suspension geometry, is its all a matter of compromise, and what suits a road car is no good on the track and visa versa, so you need to adjust it to what suits you.

Mark

[jamesG20V6]

Completely depends on how you want the car to feel and react. Mine is set up to toe out on the front, helps turn in, and in conjunction with the rear set up makes the back slide progressively before any understeer at the front. Horses for courses etc.

[Comadis]

hi and thanx for the replies.

i didnt wanted some advices from "how to change the setup". the only thing i expected:

the data´s of the wheel alignment protocols from your cars.

on a G27 you can only adjust the toe(track), the rest "comes" from the welding of chassis and the live-axle mountings. if you want to change these you need a hammer!!!

so for me its necessary to have your data´s to compare them with my car.

dont tell me that you never have visited a wheel alignment centre to see how your car is set-up?

Edited by Comadis on Thursday 17th September 18:49

[blitzracing]

This is a problem, there is no such thing as the "perfectly correct setting", as one setting will not cover all conditions as already said but If you want ball park figures Id try about 3mm per wheel to start.

[Darkspeed]

I could give you the alignment figures for my G27 but in honesty I may as well give you the figures from my old westfield for all the relevance they would be as there are only 2 other cars ever built with "perhaps" the same set up.

They are not all only toe adjustable.

Andrew

[Comadis]

isnt it possible to ask for something and get a relevant reply?

the "only" thing i want is the data´s of the protocol from a wheel alignment of a G27 with a live axle.

[blitzracing]

You may find what you want on the Ginetta Owners club forums, but you need to be a member to get access.

[Comadis]

so finally after 1 week, where this thread is online, it seams that there is not 1 onwer who has ever made a wheel alignment protocol, after building his G27?

on a original, unmodified g27 there is only the possibilty to adjust the track (toe). all other data´s are "fixed", given by the chassis welding.

this does not mean that these data´s do not need to be checked.

so what is the problem to take out the history file of your car, search for the alignment protocol and post the data´s here?

[g32turbo]

Comadis said:

so finally after 1 week, where this thread is online, it seams that there is not 1 onwer who has ever made a wheel alignment protocol, after building his G27?

Cor blimey, keep yer 'air on. I suspect there aren't too many live axle G27 owners regularly use this forum. As previously suggested you could always try paying to join the GOC and post the same question on their forum.

I have an IRS G27 and have had my car 4 wheel laser aligned but the printer at the garage failed that day so I don't have the full data. What I was interested in was what I could adjust and asked for 0 toe in on the front and 2.5 deg toe in at the rear. The handling was transformed as it was initially toed out at the front and I had loads of bump steer.

[Comadis]

i visited my alignment centre today and asked them to check all datas (castor, camber, wheelbase-->everything perfect)...so ginetta did a good job in the chassis welding. and we set the front toe to 0.


driving home felt as i was sitting in a new car.


2moro its time for visiting the Nürburgring...so lots of motorway and maybe also some laps on the "Ring"...so there are plenty infos to report..... soon...