Maz

iTrader: (34)

Material composition is superior, alloy as opposed to steel iirc, by virtue of the fact they were handling more power and torque.

RS_Matt

Corners on a skin smooth track or bumpy potholed road?

TBH I'm only scratching the surface on why the STI is significantly slower than a WRX. It was only a matter of months ago I realised just how much of a difference there is and weeks since I realised it was just more than an extra gear change lol.

It's definitely accumulative and I'd like to know all the factors in tuned and OE examples.

Weight difference
All transmission loss contributors
Extra gear change
Hitting limiter
Wheelspin from extra torque/shorter ratios
Extra drag
Ride height
Lift
Engine/oil heat management for top end performance i.e. your first run will give an higher terminal time than your last

I want to know everything.

RS_Matt

So weight will negate length? A lighter propshaft will transfer more power to the wheels than a shorter one? (Did Norris Designs run a shorter propshaft this with their bogey EVO?)

JGlanzaV

iTrader: (3)

I think the right place to start with this Matthew is a physics degree and you will answer all your own questions, turning forces, inertia, energy etc, or start googling

The Pink Ninja

iTrader: (23)

Such a poor attempt at trolling that, I`m kinda disappointed, So your Modified and extremely Lightened WRX was still slower over a 1/4 mile than a standard remapped sti spec-c with an exhaust swap and a 12 year old clutch ....Thats is a fact apart from no one has ever seen proof of a 12.6 from you have they...but please feel free to correct me if i am wrong??

Maz

iTrader: (34)

At the risk of giving you some confidential info have a read of this article. It gives an insight in to MOI and how to reduce it. As someone said above I could have mentioned Googling Newton's second law of motion and studying Dynamic Physics but this article puts it in layman's terminology.

http://www.stockcarracing.com/techar...#__federated=1

RS_Matt

lol.

Tidgy

should add basic engine specs and gearbox to the list of info, puts some context on achievement.

AndyF - 3.0 Flat 6, twin turbo, sequential gearbox
SMG - 2.5, GT42, ? gearbox
Mikee - 2.1, GT35, manual gearbox


etc etc

RS_Matt

It's hard enough just to source the 1/4 time and terminal off most members.

The Pink Ninja

iTrader: (23)

You can lol now you have posted you time but my post was put up prior to yours Mr Gill.

RS_Matt

Double lol.

RS_Matt

Nothing changes, STI still a waste of fcukin money.

stevebt

iTrader: (8)

Mine was on 11 dead before my gearbox gave up, I don't have the timeslip for it but it was on the 22b team at TOTB two years ago so would be timed somewhere. The time would of been lower if not for gearbox issues

mickywrx

iTrader: (29)

IIRC Gav did a 10.? in it Steve, before the box luched itself. Could be wrong though.

cookstar

iTrader: (6)

I managed a 10.9 recently with 518 BHP

stevebt

iTrader: (8)

I got told nothing Micky, it could of for all I know.

RS_Matt

In the Turbo 2000?

boosted

Add me to the list:
Full weight inc spare wheel 03 blob wrx, 353bhp 346lbft, 13.18 1/4 @ 103mph. This is a proper road car.

RS_Matt

Sorted bud, gonna have to go the lightweight route sooner or later with that power!

boosted

Cheers, I like to keep it a car! Needs to be comfortable and safe for my wee girl, actually putting an organic clutch in it and doing away with the paddle

RS_Matt

Some lightweight parts make the car safer and more reliable. You can even lessen transmission losses.

Save 40kg with just bucket seats!
Lightweight battery 7kg
Lightweight flywheel 6kg
Lightweight pulleys
Carbon fibre propshaft
Polycarbonate windows
Lightweight alloys
Lightweight wheel nuts
Lighter aftermarket suspension
Lighter calipers
Lightweight tyres
Spare wheel and jack removal

A good 80kg there which is equivalent to 20-30bhp factoring in transmission losses as well.

It's a nice little package for a maxed out 350/350 WRX, a 380bhp WRX is the equivalent to a 460bhp STI imo

cookstar

iTrader: (6)

Yep.

boosted

I need to keep the seats as they are for child seats, just bought a brand new battery two months ago so it's staying! I made the flywheel, it's kinda already lightweight, the audi prop is already light compared to a. Impreza one, and is only 1 meter long too. Not sure I'm ready for plastic windows! Although I have just bought some oem WRX 17" wheels to replace my heavy 18" ones. I could just put three wheel
Nuts on each wheel, that would be lighter? 😂
Above all I think I need to weigh the car as it stands just now, and also compare the weight of the wheels

RS_Matt

Yeah nuts aren't that heavy but their weight increases x125 when the wheel is spinning! Like that spinning ride at the fairground where the nipper sits on the inside and still crushes you.

boosted

Your physics is quite questionable Mathew. Not exactly following you on that one lol

RS_Matt

They probably double in weight when the wheel is spinning so a 1KG saving technically becomes a 2kg saving etc.

boosted

It doesn't work like that.
The mass of the nuts doesn't change. They will exert a centrifugal force when spun but that will in no way change their mass or weight.

ossett2k2

iTrader: (9)

Pmsl
So you're saying my car is 187kg when my wheels are turning?
75g x 20 x 125

RS_Matt

Under hard braking my nuts triple in weight too but the tail pipe becomes lighter.

Weight transfer works in mysterious ways.

RS_Matt

Am I right in saying if you put low friction oil in a 350lbft Impreza and drove it around the Nurburgring flat out that the torque figure would be around 400lbft when you crossed the finishing line?