Improving performance without engine modifications

[kiwi]

Hi guys.

I used to have long talks with a guy called Jarred (Terra Operative) from Brisbane, he did a lot of work on a Toyota Corolla Ae101 I had.

Anyway, long story short just returned from Japan and time to modify my Getz.

So my question is can i make it go faster around a track without engine modifications but do the following:

1) Add a flat undertray under the whole car (excluding the exhaust path)
2) Add a rear defuser
3) Add a front Spoiler
4) Add vortex generators to the roof and under the car (Jarred did mention years ago they actually worked)
5) Add a rear wing to the hatch.

Modifications already done are:
1) King Spring lowering Springs
2) Excel G shocks
3) Front and Rear Strut Brace
4)16mm Rear sway bar
5) 15 inch wheels and performance tires.


Thanks guys

[Silly Rabbit]

...so is this a track only car or road registered as well?.

If it's only track then remove as much of the interior as possible would be the first place to start. As for aerodynamic aids I have no idea. My guess would be unless it is 20mm off the ground and with rock hard suspension then a lot of your suggest aids ain't gonna add much to a semi stock road going car. May give you minor improvement but depends if the $$$ outlay is not a concern over a couple of seconds a lap.

Hyundai Getz ain't exactly an aerodynamic shape to start off with so air flow is still gonna be a factor even with all your suggestions.

[Hiro]

I would say that the suspension/tyres would contribute significantly more than the aero, which would only be effective at high speeds that a Getz would struggle to get around a track. Not saying that there won't be any benefit at all, but think of all the quick track/racing cars that have no aero whatsoever (Caterhams, Formula Fords etc) but light weight, sticky tyres and good power.

In short, tyres will gain you seconds, aero will gain you tenths. Gut the interior, get the suspension sorted, do the usual bolt-on enginedrivetrain mods (intake/exhaust/LSD/short-shifter etc), and you'll probably be at 95% of the maximum capability of the car without touching aero.

This wouldn't happen to be Bruce by any chance?

[kiwi]

Didnt think it would yeild much improvement. Was reading some articles about people doing this with a prius and it actually made a big difference so it got my thinking. YOu know how people with low power cars think, anything is better then nothing.

Thanks Silly and Hiro. Might just keep her as a daily. Bruce? Think you got the wrong guy.

[Hiro]

Didnt think it would yeild much improvement. Was reading some articles about people doing this with a prius and it actually made a big difference so it got my thinking. YOu know how people with low power cars think, anything is better then nothing.

Let me guess, Autospeed? You'll find that most of the aero work Julian does is for drag-reduction/fuel-efficiency, not performance (and sometimes is nothing more than throwing proven racing technology into an environment where the benefit is questionable and assuming the results are effective)

Bruce? Think you got the wrong guy.

You sound very similar to a guy on Twincam who's username was Bruce (but wasn't his actual name), who I think was a Kiwi (or maybe South African via NZ), had an AE101 and spent a lot of time with Terra asking a lot of "unconventional" questions

[kiwi]

Yeah was autospeed. Was just curious as I had a St205 in Japan with an undertray and was just an idea TBH.

Would not say i spent a lot of time with him, but he was a great help when we did talk. But its been 3 years plus since I have last seen him FWIR

[trdee]

spend every spare dollar you have on buying the best tyres you can afford. job done.

[kiwi]

Thanks Bro.

Going to go look a Libero GT this weekend, maybe just use it as a mon-fri commuter

[SHEPPO3930]

sport out the suspension, buy the best semi slicks you can afford, fit some good brakes, and then spend any left over money on track days. Lots and lots of laps is what is required to go fast.

[oldcorollas]

choptop to save weight? replace glass with lexan thin enough to actually save weight?
replace any (heavy) panels you can with thin carbon/f.glass.

move any weight you can to lower in the car
lighter batter, smaller fuel tank et cet etc

[scottreichstein]

has anyone mentioned hyclones? or electric superchargers?

[Youngy]

Hyclones are a placebo.

[Hiro]

Hyclones are a placebo.

You must have missed the memo about italics meaning sarcasm

[dnegative]

spend every spare dollar you have on buying the best tyres you can afford. job done.

Wont help with straight line speed but fit a set of R specs to anything and the braking and handing performance goes through the roof compared to a set of 4yr old Bob Jane all rounders.
Not great value for money not the best option but an option none the less.

[dumbass]

I would sell it and getz something else
spending money on this car will always come to nothing in the end
save money and buy a faster car in std form rather than trick yours up and still wont be as fast as the better car

we all know how u guys love your sheep over there so a sheep would be far better than a getz hehehehehe