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Author Free performance gains
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 18:10   View User's Profile U2U Member Reply With Quote

Is there anything i can do to get better performance out of my corsa or get a spotier sound for free??

(Cheap-scate)
Git
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Registered: 3rd Apr 03
Location: Swansea
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3rd Aug 03 at 18:12   View User's Profile U2U Member Reply With Quote

Remove the airbox
MikeH
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Registered: 3rd Apr 03
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3rd Aug 03 at 18:13   View User's Profile U2U Member Reply With Quote

Loose some weight from the car.

Only drive it on cold days or down hills.



[Edited on 03-08-2003 by MikeH]
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
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3rd Aug 03 at 18:13   View User's Profile U2U Member Reply With Quote

What are you implying MikeH??? lol

Better not remove the airbox eh?
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 18:16   View User's Profile U2U Member Reply With Quote

What i mean is, are there any little knobs or switches i can fiddle with to sap a wee bit more power--- oh and i've drilled the airbox, nice sound but my friends BFO cone sounds better!
Adam-D
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Registered: 11th May 02
Location: Cheshire
User status: Offline
3rd Aug 03 at 18:20   View User's Profile U2U Member Reply With Quote

ditch rear seats spare wheel all interior trim any thing you dont need carpet mirrors
er
dash
i cud go on and on
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 18:22   View User's Profile U2U Member Reply With Quote

don't fancy ditching the spare and it's a 5door so rear seats need to be kept i think. No little engine tweaks or anything??
MikeH
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Registered: 3rd Apr 03
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3rd Aug 03 at 18:28   View User's Profile U2U Member Reply With Quote

r8cr: i might be wrong but i could swear my car runs quicker when i put 97 ron unleaded in it instead of the recomended 95 ron.

You could check to see if there is much slack in your throttle cable i suppose! If there was a lot it might not be opening the butterfly valve fully.

Oh, inflate your tyres to the correct pressure as well, that'll help.

Git
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Registered: 3rd Apr 03
Location: Swansea
User status: Offline
3rd Aug 03 at 18:30   View User's Profile U2U Member Reply With Quote

Ive been treating my car to the old Shell Optimax, nice
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 18:31   View User's Profile U2U Member Reply With Quote

Cheers mate! I suppose a higher octane fuel will help eh! It'll be super unleaded the next time then eh!
Adam-D
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Registered: 11th May 02
Location: Cheshire
User status: Offline
3rd Aug 03 at 18:33   View User's Profile U2U Member Reply With Quote

yeah but its wasted unless you have the correct fuel ron plug on the engine
Git
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Registered: 3rd Apr 03
Location: Swansea
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3rd Aug 03 at 18:35   View User's Profile U2U Member Reply With Quote

Next question:

How would we find this out?
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 18:36   View User's Profile U2U Member Reply With Quote

do you have to reset the ecu when yuo change the ron plug to a higher number??
MikeH
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Registered: 3rd Apr 03
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3rd Aug 03 at 19:10   View User's Profile U2U Member Reply With Quote

Adam-D: So if you change the plug, do you get a performance gain on 97ron?
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
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3rd Aug 03 at 20:04   View User's Profile U2U Member Reply With Quote

yes caus the ecu will readjust for optimum performance/economy for that fuel rating
MikeH
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Registered: 3rd Apr 03
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3rd Aug 03 at 20:15   View User's Profile U2U Member Reply With Quote

But does higher ron mean a more combustable fuel?

I was under the impression that higher ron meant it could handle higher compression without self igniting. So it is generally used for performance cars with a higher engine pressure ratio.

So in theory if it is used in a corsa 1.2 there should be no difference.

BUT

Mine does seem to run better with it even with the 95 plug in it. (actually maybe the wrong plug is the reason?)

"yes caus the ecu will readjust for optimum performance/economy for that fuel rating"

..... it adjusts with the pre-conception that the fuel is 95 ron, it can't detect the fuel (hence the plug).

so..... if you put the correct plug in then the car will know it can increase compression without the knock sensor being triggered....

I think i have just answered my own question.....

Where can i get the 97 ron plug from and how much is it?
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 20:21   View User's Profile U2U Member Reply With Quote

you just unclip the one that's there now and flip it over m8
MikeH
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Registered: 3rd Apr 03
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3rd Aug 03 at 20:26   View User's Profile U2U Member Reply With Quote

oooohhh, have to get my haynes manual out and find it now
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 20:30   View User's Profile U2U Member Reply With Quote

look under the bonnet between the air filter and the windscreen and will see a black thing on the end of a tube which will say 95 or 97 on it in white (ron) when you unclip it you may even find a 98 on a third side depending on the engine!
Adam-D
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Registered: 11th May 02
Location: Cheshire
User status: Offline
3rd Aug 03 at 20:30   View User's Profile U2U Member Reply With Quote

pice of piss prob is on mine the numbers have worn off
vaux sell em for bout a £5er
r8cr
Member

Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 20:32   View User's Profile U2U Member Reply With Quote

how old is yours like??? Mine is a 1994!
MikeH
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Registered: 3rd Apr 03
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3rd Aug 03 at 20:33   View User's Profile U2U Member Reply With Quote

Actually, is it only the sohc (8v) models that have a plug?
r8cr
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Registered: 2nd Aug 03
Location: Blairgowrie
User status: Offline
3rd Aug 03 at 20:36   View User's Profile U2U Member Reply With Quote

yes i think you're right. I think the others are controlled automatically by the ecu
Gambit
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Registered: 5th Jun 00
Location: Common Sense HQ
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4th Aug 03 at 08:42   View User's Profile U2U Member Reply With Quote

ecotec's have a knock sensor instead of the switch
MikeH
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Registered: 3rd Apr 03
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4th Aug 03 at 11:51   View User's Profile U2U Member Reply With Quote

So without having my ECU chipped I am simply wasting my money on the more expensive 97 ron fuel?

Guess i'll stick with 95 then.

The smoother sound from the engine must be all in my head.

 
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