More weightloss... another 6.2kg bites the dust!

[Lloydie38]

There's only one way to settle this argument ......FIGHT!!!!!!!!!!!!!!!!!!

[Jon_Bmw]

Prof matt, have you still not taken this in:

So what you're saying is RWD cars are immune to the basic principals of weight transfer then??

This is what causes it. I think you are getting confused with how to deal with it once its occured. Front wheel drive you just wack the power on and it will pull you through(if you have aimed your car in the right direction) I think rear wheel drive you have to be a bit more subtle with it.

I wouldn't bet your car on it put it that way.

[320Touring]

right folks can we keep this on topic please

WAYS TO LIGHTEN AN E30.

discuss.

professormatt, watch your attitude please dude, dont want us scots to get a bad name

[agent006]

Any way we can split this into two threads?

[steerfromtherear]

Any way we can split this into two threads?

Good point. This is a worthwhile subject for track day section imo

[Brian28]

Proff Matt you have PM.

Regards
Brian
(Just back from a weekends lift off oversteering in the Prod BMW championship at Pembrey )

[ste]

actualy im going be at a few track days in my e30 track car soon

i will personaly give my car away to the person who can make it oversteer by lifting off the throttle

the forefit?

im taking your car if you cant

think before you take me up on this....

I'll take you up on that sunshine.

[ste]

you guys wouldn't know your arse from your elbow

i told my mate's on the MLR fourm about this thread. laugh? they nearly did!

i drive a 600bhp r34 gt-r v spec skyline,600bhp 525 and a 440bhp 535
as well as 325 and a transit van

i know what lift off over steer is and i sure as hell dont get it in any of it in the above..........

This is possibly one of the funniest posts I have ever read.

Which track will you be at? I'll come and meet you, lift off oversteer your car and take the V5 with pleasure.

[steerfromtherear]

i drive a 600bhp r34 gt-r v spec skyline,600bhp 525 and a 440bhp 535
as well as 325 and a transit van.

I'd like to see the 600bhp 535 and 440bhp 535 myself.

[oldroydsr4]

I currently use a 350bhp mr2 turbo (rearwheel drive)for trackdays)+ study motorsport engineering and design, if you provoke the car into a drift and lift off the car will snap sideways even more aggreesively the same occurs during steady state cornering to initiate a drift, although midengined cars are worse for this. This in turn is down to weight transfer. So professor?matt it is possible.

[alan1272]

actualy im going be at a few track days in my e30 track car soon

i will personaly give my car away to the person who can make it oversteer by lifting off the throttle

the forefit?

im taking your car if you cant

think before you take me up on this....

i'll take your car when i get it to lift off oversteer and even give you a tenner to take mine away.

think before you take me up on this...

[Brian28]

So then .... anybody saved any weight recently?

[JimmyC]

So then .... anybody saved any weight recently?

YEP, took the engine out the other day ;)

[agent006]

So then .... anybody saved any weight recently?

My engine's getting in on the act now, keeps getting rid of coolant to save weight.

[JoeE30]

Lift-off oversteer
From Wikipedia, the free encyclopedia
(Redirected from Trailing-throttle oversteer)
Jump to: navigation, search
Lift-off oversteer (also known as trailing-throttle oversteer, lift-throttle oversteer, or drop-throttle oversteer) is a form of oversteer in an automobile that occurs when the vehicle's weight shifts from the rear to the front too quickly due to throttle release while cornering. Specifically, the reduction of weight on the rear tires decreases their surface area on the road surface.

This oversteer is often more pronounced in rear-engined cars with rearward centers of gravity such as older Porsche 911s, though technically any vehicle can experience lift-off oversteer. Various suspension enhancements, such as a Weissach axle or a multi-link suspension, can limit a vehicle's tendency to oversteer in this situation. Additionally, firmer suspension systems reduce the amount of nose-dive, hence maintaining a larger contact patch on the rear tires.


Anyway, any new ideas on the weight saving...What can i do with the sunroof...

I have complely striped the interior and dont really want to start cutting the strenth away from the body by drilling holes and cutting bits away...

[mikey-t]

So then .... anybody saved any weight recently?

leaving ti to nature dude! rust is lighter than steel

[agent006]

Anyway, any new ideas on the weight saving...What can i do with the sunroof...

I have complely striped the interior and dont really want to start cutting the strenth away from the body by drilling holes and cutting bits away...

I took all the mechanism out and have bonded the metal panel back in. Using temporary wood blocks to hold teh lanel up and used silicon sealant to make it all stick and be watertight. I've got a carbon panel waiting to replace it when i remove the runners.

[nem]

Where did you get the CF panel from???

[agent006]

http://www.bmwm3shop.de/main.php?site=p ... =1&pid=113

Took a while, but that was a manufacturing delay. Really good to deal with and the panel is great.

[nem]

Looks nice. However It is quite expensive and I have a lot more cost effective ways to lose weight before I would go for one of those.

Also has anyone replaced their electric window motors with the keep fit variety? Do they swap over or do I need new doors? As I have a 4 door I was thinking of changing the rear windows to plastic ones and removing the 4 motors and wiring.

[agent006]

Looks nice. However It is quite expensive and I have a lot more cost effective ways to lose weight before I would go for one of those.

True but it does come out cheaper than welding a metal panel and repainting the roof.

[DRIFTBOY]

Looks nice. However It is quite expensive and I have a lot more cost effective ways to lose weight before I would go for one of those.

Also has anyone replaced their electric window motors with the keep fit variety? Do they swap over or do I need new doors? As I have a 4 door I was thinking of changing the rear windows to plastic ones and removing the 4 motors and wiring.

I have on a 2-door.
I was lucky though, I got the manual mechanisms and handles at a scrappy. Fitted my glass to them and bolted them in - there are holes for both in the doors. I then found out that there is two types of glass and mechanisms - luckily mine matched! Not sure if it changes on a year or what? Just had to cut a small + shape in the door card for the winder handle soindle - easy to see where when you offer it up. I removed the wiring, central locking and it's wiring, but I couldn't be bothered to separate the electric mirror wires so ripped it out all together along with the wiring for it all under the carpet and in by the sills. While I was there I scraped the sound proofing off the inside of the door.

[northloop]

Just starting to strip mine at the moment.

Drivers seat only in the car at the moment, all the black tar stuff removed.... just making my mind up what to do next.

Will watch and read this thread with interest.

Gary

[Lloydie38]

The Sunroof is out!

Thanks Dave who hacked away and got injured in the process - Pictures are on my website www logo at the base of the page. Pics 15 and 16 in the E30 tab.

[nem]

Looks like a neat job, nice.
It would be great if you could weigh up all of the sunroof parts as it would be good to know how much difference it makes. I am currentlyleaving mine as is untill I find out if it is really worth all the hassle.

[djs325]

So then .... anybody saved any weight recently?

leaving ti to nature dude! rust is lighter than steel

I'll go you one better: "Nothing's lighter than a hole!"

My car is a Hong Kong Car - it gets lighter after every race as little bits of metal fall off from under the guards...

[Lloydie38]

All sunroof parts 7.1 kgs

[djs325]

Due to take all those out shortly, just a bitch given the lack of time thanks to University and work, and the fact the car has to be at an event 11-12 November.

[JimmyC]

reskin the roof if your removing the sunroof, just doing mine- looks great

[Lloydie38]

reskin the roof if your removing the sunroof, just doing mine- looks great

Any pics mate?

[JimmyC]

Got one done with no paint on and another being ripped apart to do in a week or two

I'll get some pics showing the stages when I start next week ;)

[oguz327]

How did the re- skin go?

[Lloydie38]

My exterior roof looks a bit messy buy nothing like as bad if I ever roll it!
[img][img]http://i142.photobucket.com/albums/r117 ... emoved.jpg[/img][/img]
[img][img]http://i142.photobucket.com/albums/r117 ... tedish.jpg[/img][/img]

Cage to go in before the next track day on 15th Feb on the Isle of Man..


Track day website at http://manxtrackcars.webeden.co.uk/ Worth a look hubba hubba

[JimmyC]

On reskin number 2 of 4 at the mo

Didn't get any pics yet but will get some of the finished car and the work in progress one, finished one looks like it was there from the factory!

[northloop]

A little progress on mine.

Now fully poly bushed, pretty well stripped, sun roof almost sorted. I previously ballsed it up by trying to remove the whole carrier assy Next jobs, tidy up and fit cage. It looks like it's on stilts now with the weight out. Suspension arrives early Jan.