Stability Under Brakes And Car Walking Around

[Roy]

So thats it then is it? I am going bald. Fark. How do i afford a convertible F430 like all the other bald 30yr olds i see. I will never get laid again

[Cubes]

So thats it then is it? I am going bald. Fark. How do i afford a convertible F430 like all the other bald 30yr olds i see. I will never get laid again

Shave the head Troy... Women love bad asses. Look at Danthemetrosexualman.. He gets all the chicks.

[Beer Baron]

stop your whingeing brisby. you're not going bald. just harden the f**k up. fix your car. and get your arse up here for EC.

[Cubes]

stop your whingeing brisby. you're not going bald. just harden the f**k up. fix your car. and get your arse up here for EC.

lol...

[Roy]

Well now have two sets of suspension to try in the car, possibly 3. So will see how i go over the next 8-10 weeks as i play with each and see what i like.

[NickR33]

what have you lined up to try out? I'm looking at ways to make my car faster without changing turbo or tires (ie staying in standard RWD class)...

[Roy]

Plan is for re-jigged Bilsteins, and while im waiting for them to be done i have arranged to try some Tein Flex. I am also considering buying the Greddy Type S as at around 2k they look to be decent value. But for the time being will send the Bilsteins off and hoping that they will do the job.

More then anything i need to stop the pitching under brakes as im not able to use the liits of the brakes am currently running because of the old suspension

[NickR33]

yep I get that too... bars are good to stop the body roll but my thing stands on its nose under braking which makes the rear too light and it always wants to come round... turns in really well like that but I can't trail brake that much or I end up facing the other way lol... hurts my acceleration out of the corner too as I get too much weight transfer and the inside wheel just spins... I want to get my Bilsteins redone too but after more obvious changes like cancelling HICAS, the speed limiter and getting a decent diff

[Roy]

Dramas ...

It seems possible that my rear end grip problems may have from the vent on the gearbox. Talking it over and watching the vids with a guy who is pretty experience track guy. He commented that the problem seems to be after high speed straights etc and the car is fine in the lower speed corners. The gearbox is breathing fluid onto the underside of the car.

You can see on the above video that on the back straight the car was walking around in the rear end.

Anyway, no doubt the maintenance on the brakes, suspension and gearbox will fix whatever the problem is. Im using the carpet bombing approach to rectifying the problem and gettign a few better mods in at the same time.

Does anyone else have problems with their gearboxes breathing. I have associated the lack of rear end grip after 2 laps with the fact that my car overgheats rear tyres. It could be the gearbox is getting hot and breathing. The final few corners show hoe little rear end grip it has when whatever the problem is strikes. Afther the lose on the left hander i had backed off for the right hander and still it let go. Good fun but sure as hell isnt quick

[Ronin 09]

where's the incident video?

[tacker]

Roy,

no expert on these cars but i would be surprised if your tyres would go from what appears ok in the video to what appears crap in the space of 1/2 a lap, well less in fact as you had to catch it in the corner before coming onto the straight. I have not had any issues with the gearbox leaking ( about the only thing that dont leak ) or breathing, how much fluid are we talking about being on the underside of the car. Sounds like a real possibility though, do you see and oil in the bottom of the tread pattern?

and by the way i see plenty of 430's on the track and they tend to do the same :-)

Edited May 6, 2007 by tacker

[dontfeelcold]

just watched the vids. OMG. thats bad, really bad. Especially off the end of the back straight.

How about a catch can on the gearbox and maybe the diff aswell just to be sure?

[Roy]

If i hadnt seen the amount of fluid on the underside of the car then i wouldnt have thought a catch/breather tank would be required. I have done a few things to the gearbox boots and will throw some hose on the end of the breather hose and see if i can suss out exactly what is going on. The fact that i overfilled the gearbox around 10mm wouldnt be helping...but anyway. Will see what happens next weekend at a motorkhana that has a lille 60sec circuit.

[tacker]

mate it has to be some kind of fluid spilling onto your rear boots as the first part of the lap your car looks ( and sounds ) good.

Tyres cant change that fast went from good to soap in half a lap

[yogi000]

roy,

scary moments in the clips, hope you can get it sorted.

also, your car sounds awesome

cheers

[phunky_monkey]

My gearboot was leaking and dropping oil onto my exhaust, have you tried replacing it? Can you smell it inside the cabin?

[Roy]

Oh yeh. I can smell it inside the car. Thats why i pulled the gear lever boots off because the one on my old R31 GTS-X split and did the saem thing. Though it never spewed lots of fluid anywhere. Just a bit of vapour/odour. It wasnt split, just missing a clip fvrom around he bottom

[Roy]

Well the new shocks have improved the stability under brakes and the car is now stopping a lot better. Its now too stable as the poor rotors are cracking as a result of the huge heat loads i can no wput through them.

But the problem of crabbing down the road at speed still exists, also the strange loading / unloading mid corner...where it seems like god himself just leans on the car a little forcing the car to lurch onto its outside then it tightens up again.

Anyone have any ideas? Im thinking repalce the rear tie rod ends as i knwo they are worn and perhaps the problem is a change of toe with the loading of the suspension. Also thinkings its time to remove the pineapples and actually replace the subframe bushes.

Has anone replaced a front steering rack...as new front tie rod ends and rack ...fark it. Im thinking about some carpet bombing to try and fix the problem as its very off putting on the quick kinks at 180km/h plus

So what is the symptoms of hammered rear cradle bushes?

[Cubes]

When my subframe bushes were nacked the car would steer from the rear on acceleration which was extremely noticeable when coming off the throttle. It would also grab every line in the road from the rear when accelerating.

It felt rather unstable mid corner and always required corrections to hold the line. It felt nervous.

If you wish to dial in any cradle rake grab the GTR subframe bushes and chop them down accordingly.

The bushes Noltec list for the R32 GTS are incorrect; you require the ones that are shorter and for the life of me I can't find the part number. :S

Thanks for your PM you'll be hearing from me shortly.

[Roy]

When my subframe bushes were nacked the car would steer from the rear on acceleration which was extremely noticeable when coming off the throttle. It would also grab every line in the road from the rear when accelerating.

It felt rather unstable mid corner and always required corrections to hold the line. It felt nervous.

Thats sounds pretty damn close to what i am experiencing. At speed in a straight line did you find it took small steering corrections to keep it in a straight line...almost lik eyou are getting caught by a high cross wind...only there is no wind