alloy sizes VS acceleration - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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MoNkEy MaGiC

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Registered: 12th Apr 03
Location: West - London Drives: Corsa GSi
User status: Offline

19th Jun 04 at 11:25

ive got a modded corsa Gsi 1.6 16v, with zorst and viper kit etc, its a pretty quick little car!!

its got 14 inch gsi alloys at the moment with a diameter of roughly 42cm
i want some 17 inch alloys which will have a diameter of roughly 47cm...

which is a diffrence of just 5cm, (2 inches)
so will this really make any sort of difference to the acceleration and handling on my car???

[Edited on 19-06-2004 by MoNkEy MaGiC]

Drysdale

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Registered: 20th May 04
Location: Milton Keynes
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19th Jun 04 at 11:28

Well....you'll lose some acceleration as the roll of the wheel is bigger...thus it takes longer for the wheel to go round. Steering will be affected slightly as the wheel has a bigger surface area, thus takes slightly longer to turn.

big eck

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Registered: 20th Apr 03
Location: Tullibody. Drives - Audi B8 S4 & Fiesta Zetec-S
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19th Jun 04 at 11:33

17's look good but are a bit of a bitch too fit unless they've gt a perfect offset, stick to a nice set of 16's, they look just as good and wont hamper the acceleration

Drysdale

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Registered: 20th May 04
Location: Milton Keynes
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19th Jun 04 at 11:40

As long as you're not totally slammed, then its not that much work. I'd say 17's was the absolute max you should go unless you're building a show car.

MoNkEy MaGiC

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Registered: 12th Apr 03
Location: West - London Drives: Corsa GSi
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19th Jun 04 at 11:41

offset is ET45, 17x7, 205/40 tyre and im gonna do ALL arch work so it WILL be good fit

the Gsi's are already a little lower anyway so wont lower it yet....but if i do it will be between 50-70mm

not toooo worried if i loose a "little" performace as i wil do further engine mods later on anyway so i dont mind

ive heard people with 17s with 1.6 engines dont really notice any major performance differences anyway

it does 0-60 in 8-9seconds, so how much am i looking at with 17s?

[Edited on 19-06-2004 by MoNkEy MaGiC]

Ian

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Registered: 28th Aug 99
Location: Liverpool
User status: Online

19th Jun 04 at 12:19

It will be slower and you will need to lower it.

Drysdale

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Registered: 20th May 04
Location: Milton Keynes
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19th Jun 04 at 12:53

Its not really worth doing a 0-60 on 17s. Doubt you'd be impressed. If you're going for track days, keep your old 14s and just use the 17s all other times.

MoNkEy MaGiC

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Registered: 12th Apr 03
Location: West - London Drives: Corsa GSi
User status: Offline

19th Jun 04 at 12:59

quote:
Originally posted by Drysdale
Its not really worth doing a 0-60 on 17s. Doubt you'd be impressed. If you're going for track days, keep your old 14s and just use the 17s all other times.

i dont use the car on tracks, and i dont race around on the roads either, just for normal driving really

Drysdale

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Registered: 20th May 04
Location: Milton Keynes
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19th Jun 04 at 13:00

Then you'll be fine on 17s. Go for it.

sfxer

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Registered: 23rd Aug 00
Location: devon, england
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19th Jun 04 at 14:01

you wont notice any difference apart from bumps seem bigger and harder!

i noticed no difference in speed, only way you would see the difference is if it was timed properly, and then your only talkin hundredths of a second over 0-60

MoNkEy MaGiC

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Registered: 12th Apr 03
Location: West - London Drives: Corsa GSi
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19th Jun 04 at 14:57

quote:
Originally posted by sfxer
you wont notice any difference apart from bumps seem bigger and harder!

i noticed no difference in speed, only way you would see the difference is if it was timed properly, and then your only talkin hundredths of a second over 0-60

yeah thats what i thought

coz the 17s are only slightly bigger in diameter and circumference compared to the alloys i got now so it cant efect it too much or be noticable!

sfxer

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Registered: 23rd Aug 00
Location: devon, england
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19th Jun 04 at 15:00

its also down to the weight and other factors, but like i say i doubt u'll notice anything

ultra_corsa

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Registered: 12th Jun 04
Location: Luton
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19th Jun 04 at 18:36

do 17"'s!!!

just change em back to ur old ones for track days etc

Kris TD

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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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19th Jun 04 at 18:39

quote:
Originally posted by sfxer
you wont notice any difference apart from bumps seem bigger and harder!

i noticed no difference in speed, only way you would see the difference is if it was timed properly, and then your only talkin hundredths of a second over 0-60

i disagree, there was a huge differnce in speed when i took my old 17's off and put the standard rims back on, so much quicker.

dont forget the 17's will weigh like twice as much.

broster

Premium Member

Registered: 6th Dec 02
Location: Drives: E39
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19th Jun 04 at 18:56

gunna say the tame as kris, and his car has loadsa torque to more the 17's round lol, its not the size that matters as much its the weight of the alloy! if u really want 17's then pic some light ones. also i think 15's look alot better on a corsa than 17's

MoNkEy MaGiC

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Registered: 12th Apr 03
Location: West - London Drives: Corsa GSi
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19th Jun 04 at 19:03

in wat way did it feel slower? lower, mid or upper rev range? or generally throughout?

the 17s im getting cant be too much more heavier than my current standard 14inch Gsi alloys surely??

Jambo

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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
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19th Jun 04 at 19:29

They make it slower but its not as bad as some people are making it sound.

I love this place

Marco The Corsa Man

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Registered: 24th Mar 04
Location: I Smoke Dead People
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19th Jun 04 at 20:43

Ive no power steering and when I wrnt from 13" steels to 16" alloys I noticed that some big bumps nearly rip the wheel outa my hands, other times Ive had the car go into "scalectrix" mode where it just wants to follow a rut in the road. Bloody good fun tho, and tones and tones of feedback, just the way I like it

IntaCepta

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Registered: 25th Mar 02
Location: Mill Hill East, Greater London
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19th Jun 04 at 23:45

from 13" to 16" i noticed a great difference in speed, especially low end pickup was shite!

but i guess u do notice a drop in acceleration throughout the range.

Kris TD

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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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20th Jun 04 at 08:05

quote:
Originally posted by MoNkEy MaGiC
in wat way did it feel slower? lower, mid or upper rev range? or generally throughout?

the 17s im getting cant be too much more heavier than my current standard 14inch Gsi alloys surely??

mainly bottom and top end

gsi alloys are lgithweight actually.

Russ

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Registered: 14th Mar 04
Location: Armchair
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20th Jun 04 at 08:09