Fuel octane requirement STI Prodrive 330bhp 2009
21 March 2013, 08:13 PM
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Fuel octane requirement STI Prodrive 330bhp 2009
Where I live we are about to lose the supply of 97/98 octane fuel and will only be able to purchase 95 octane.
Does anyone know whether the engine management system can be changed on a 2009 WRX STI with standard dealer fitted Prodrive upgrade (330bhp) to accommodate this ?
It is of course possible to add additives to each tankful but this could get expensive.
I understand that no damage will be done to the engine running on 95 (unless you know different), but that the performance will suffer.
Any comments?
Simon Slaffer
Does anyone know whether the engine management system can be changed on a 2009 WRX STI with standard dealer fitted Prodrive upgrade (330bhp) to accommodate this ?
It is of course possible to add additives to each tankful but this could get expensive.
I understand that no damage will be done to the engine running on 95 (unless you know different), but that the performance will suffer.
Any comments?
Simon Slaffer
22 March 2013, 01:50 PM
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do you have any paperwork with the car for the PPP? as i have just bought a UK300 with the PPP and it does state that running on 95RON will not give the best performance but it sounds like you can run it on it.
but if you car has been specifically mapped to run on 97/99 ron then you will have problems.
the RON number is the fuels resistance to det (pre-ignition), the higher the number, the more 'safe' the fuel
so by running flat out on the 95 you could cause the engine to det, and melt pistons.
do you have any rolling roads near you? if so it may be worth on the next refuel to fill it with 95 and put it on the rollers, that way the operator can check what the engine is doing at high load and if its going to be safe. my local place charges £60 + VAT for a power run, far cheaper than a rebuild!
but if you car has been specifically mapped to run on 97/99 ron then you will have problems.
the RON number is the fuels resistance to det (pre-ignition), the higher the number, the more 'safe' the fuel
so by running flat out on the 95 you could cause the engine to det, and melt pistons.
do you have any rolling roads near you? if so it may be worth on the next refuel to fill it with 95 and put it on the rollers, that way the operator can check what the engine is doing at high load and if its going to be safe. my local place charges £60 + VAT for a power run, far cheaper than a rebuild!
22 March 2013, 09:58 PM
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95 fuel
Good guess. Jersey.
Rolling road an excellent suggestion.
ps Have heard that one or two retail outlets may continue with 97/98. This should make commercial sense as 7% of the Islands fuel currently sold is 97/98; that is an awful lot of fuel.
Rolling road an excellent suggestion.
ps Have heard that one or two retail outlets may continue with 97/98. This should make commercial sense as 7% of the Islands fuel currently sold is 97/98; that is an awful lot of fuel.
22 March 2013, 10:23 PM
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If its a propper ppp conversion then you may be ok.
I am very new scoobs tho, as i have only had mine since the 11th, mot was due the day i bought it and i live local to castle combe where circuit motors are my nearest rr, so booked it in for mot and a shot on the rollers as ou hear of all kinds of horror storys with subarus melting pistons, so to be safe i had it checked.
I do have the prodrive certificate tho, and it states on there that you can run it on 95, but better on 97+ to get the most out of the engine.
Hth mate
I am very new scoobs tho, as i have only had mine since the 11th, mot was due the day i bought it and i live local to castle combe where circuit motors are my nearest rr, so booked it in for mot and a shot on the rollers as ou hear of all kinds of horror storys with subarus melting pistons, so to be safe i had it checked.
I do have the prodrive certificate tho, and it states on there that you can run it on 95, but better on 97+ to get the most out of the engine.
Hth mate
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26 March 2013, 07:44 PM
#11
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This is being forced on the islands by the fuel importer. We buy these performance cars and then have the performance taken away by a monopoly.
27 March 2013, 01:53 PM
#13
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Does the speed limit make a difference?
There are a large number of high performance vehicles in the islands and a large motorsport contingency.
There are a large number of high performance vehicles in the islands and a large motorsport contingency.
27 March 2013, 06:53 PM
#14
It would to me.
Depends on why you bought your car I suppose.
I just bought mine to drive and I don't clean it very often.
Personally I wouldn't own my STI with that speed limit as I would just consider it a waste of money - but every one has different circumstances I guess.
Is there a race track or anything like that there?
Depends on why you bought your car I suppose.
I just bought mine to drive and I don't clean it very often.
Personally I wouldn't own my STI with that speed limit as I would just consider it a waste of money - but every one has different circumstances I guess.
Is there a race track or anything like that there?
Last edited by cster; 27 March 2013 at 06:54 PM.
27 March 2013, 07:05 PM
#15
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I bought mine as I wanted an impreza for many years after watching McRae, the opportunity to buy one came along.
The car was modified to its current level after I moved to the uk for a few years, now I am back in the island and I am being forced into a situation that is not aceptable.
The majority of high performance cars are owned by the wealthy, I am sure if their Aston Martin wnet bang they would have someting to say to the fuel company for supplying a fuel not suitable for use.
The car was modified to its current level after I moved to the uk for a few years, now I am back in the island and I am being forced into a situation that is not aceptable.
The majority of high performance cars are owned by the wealthy, I am sure if their Aston Martin wnet bang they would have someting to say to the fuel company for supplying a fuel not suitable for use.
27 March 2013, 09:00 PM
#16
Well if worse comes to worse, I'm guessing maybe remap one of your maps might be your best bet. Hopefully they will keep selling higher octane, if that is what the movers and shakers on Guernsey want.
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