Tesco 99RON photographic proof
29 April 2005, 01:04 PM
#61
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Originally Posted by Adam M
just to note, everyone, JDM UK, ford fiestas, all petrol driven cars that can accept unleaed fuel will benefit from higher octane fuel.
...but will only benefit from after the visit to the petrol pump, if the car can adjust its timing automatcally to the higher octane, and / or has a lambda sensor to adjust AFR's. Otherwise another trip to a mechanic to give it a retune is needed.
29 April 2005, 01:12 PM
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and where does it state theat optimax is 98 octane ?? ive never seen them advertise what it is... thought it was just ordinary stuff with a load of boosters and stuff in and hence they cant really give a true octane value ??
well i will probably start sticking this tesco stuff in if it comes our way
well i will probably start sticking this tesco stuff in if it comes our way
29 April 2005, 01:39 PM
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Originally Posted by Adam M
just to note, everyone, JDM UK, ford fiestas, all petrol driven cars that can accept unleaed fuel will benefit from higher octane fuel.
With high octane fuel you can run with the ignition more advanced. If these cars can't automatically advance the ignition how are they going to benefit from it?
Edited - Jay beat me to it
29 April 2005, 01:43 PM
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I took Adam's post to follow on from the pervious one about it being on a trial basis so everyone needs to go out and buy it so it is successful and tesco roll it out all over the country. Therefore, if you have a scooby and the Mrs has a fiesta then buy it for the fiesta because it will help ensure the 99ron stuff is here to stay.
Obviously I could be wrong.........
Obviously I could be wrong.........
29 April 2005, 02:19 PM
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Originally Posted by Del mar
Why is SUL more expesive than already UL ?
Do you think it is really more expensive to manufacture, or is it just to get more money out of us ??
Del
Do you think it is really more expensive to manufacture, or is it just to get more money out of us ??
Del
Why is 18k gold more expensive then 9k gold. Dammmmmm all the money grabbers to hell!!! Enough is enough i'm going on hunger strike.... 
29 April 2005, 02:21 PM
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ok,
higher octane means you can run more advance which means more power if your ecu can retune to it, but it also means that without running more advance you have more det resistance. So, if charge temperatures increase or it is a very dry and hot day, then the ignition timing your car is running is further from the edge of det.
It means you have a bigger safety net to allow you to run at full power in more extreme conditions.
I was also under the impression that the calorific value of the fuel is higher, therefore, if you don't boot it on the account of having more power, you should see better fuel consumption.
higher octane means you can run more advance which means more power if your ecu can retune to it, but it also means that without running more advance you have more det resistance. So, if charge temperatures increase or it is a very dry and hot day, then the ignition timing your car is running is further from the edge of det.
It means you have a bigger safety net to allow you to run at full power in more extreme conditions.
I was also under the impression that the calorific value of the fuel is higher, therefore, if you don't boot it on the account of having more power, you should see better fuel consumption.
29 April 2005, 02:51 PM
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Ok, thanks for the explanantion - just wondering why is it that people say they have had a TEK 3 remap based on optimax when the ecu automatically takes account of the Ron and adjusts accordingly ?
29 April 2005, 03:09 PM
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Originally Posted by Adam M
ok,
higher octane means you can run more advance which means more power if your ecu can retune to it, but it also means that without running more advance you have more det resistance. So, if charge temperatures increase or it is a very dry and hot day, then the ignition timing your car is running is further from the edge of det.
It means you have a bigger safety net to allow you to run at full power in more extreme conditions.
I was also under the impression that the calorific value of the fuel is higher, therefore, if you don't boot it on the account of having more power, you should see better fuel consumption.
higher octane means you can run more advance which means more power if your ecu can retune to it, but it also means that without running more advance you have more det resistance. So, if charge temperatures increase or it is a very dry and hot day, then the ignition timing your car is running is further from the edge of det.
It means you have a bigger safety net to allow you to run at full power in more extreme conditions.
I was also under the impression that the calorific value of the fuel is higher, therefore, if you don't boot it on the account of having more power, you should see better fuel consumption.
If you are already using the proper octane fuel, you will not obtain more
power from higher octane fuels. The engine will be already operating at
optimum settings, and a higher octane should have no effect on the management
system. Your driveability and fuel economy will remain the same. The higher
octane fuel costs more, so you are just throwing money away. If you are
already using a fuel with an octane rating slightly below the optimum, then
using a higher octane fuel will cause the engine management system to move to
the optimum settings, possibly resulting in both increased power and improved
fuel economy. You may be able to change octanes between seasons ( reduce
octane in winter ) to obtain the most cost-effective fuel without loss of
driveability.
Once you have identified the fuel that keeps the engine at optimum settings,
there is no advantage in moving to an even higher octane fuel. The
manufacturer's recommendation is conservative, so you may be able to
carefully reduce the fuel octane. The penalty for getting it badly wrong,
and not realising that you have, could be expensive engine damage.
power from higher octane fuels. The engine will be already operating at
optimum settings, and a higher octane should have no effect on the management
system. Your driveability and fuel economy will remain the same. The higher
octane fuel costs more, so you are just throwing money away. If you are
already using a fuel with an octane rating slightly below the optimum, then
using a higher octane fuel will cause the engine management system to move to
the optimum settings, possibly resulting in both increased power and improved
fuel economy. You may be able to change octanes between seasons ( reduce
octane in winter ) to obtain the most cost-effective fuel without loss of
driveability.
Once you have identified the fuel that keeps the engine at optimum settings,
there is no advantage in moving to an even higher octane fuel. The
manufacturer's recommendation is conservative, so you may be able to
carefully reduce the fuel octane. The penalty for getting it badly wrong,
and not realising that you have, could be expensive engine damage.
I'll give Tescos 99 a try when I can get it here, but I can advance the ignition on my ECU, so I'll benefit from it.
29 April 2005, 03:18 PM
#73
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Originally Posted by Del mar
Why is SUL more expesive than already UL ?
Do you think it is really more expensive to manufacture, or is it just to get more money out of us ??
Del
Do you think it is really more expensive to manufacture, or is it just to get more money out of us ??
Del
29 April 2005, 03:27 PM
#74
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I guess the point is then even if you don't get better performance / consumption with the higher RON on most modern cars is that it's still cheaper ron for ron than Optimax ?
Although it hasn't been made clear yet what detergents etc the Tesco fuel has so it may be that optimax is the best from that perspective. ?
Although it hasn't been made clear yet what detergents etc the Tesco fuel has so it may be that optimax is the best from that perspective. ?
29 April 2005, 03:40 PM
#75
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Its nice to see some competition for Optimax, purely on a price basis, but from memory I think Optimax was initially marketed as MINIMUM rating of 98.4RON, and would more often be at 99RON.
So although Optimax is advertised as 98RON (i must admit I don't look at the pump when filling, so cannot say) perhaps its nearer 99RON than we imagine.
I appreciate it would need to be minimum 98.5RON not 98.4RON to be advertised as 99RON (ie rounded up), so that may be the reason they don't advertise it as 99RON.
Cheers
MTR
So although Optimax is advertised as 98RON (i must admit I don't look at the pump when filling, so cannot say) perhaps its nearer 99RON than we imagine.
I appreciate it would need to be minimum 98.5RON not 98.4RON to be advertised as 99RON (ie rounded up), so that may be the reason they don't advertise it as 99RON.
Cheers
MTR
29 April 2005, 03:46 PM
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What is the MON rating of Shell Optimax? - In a forced induction engine, it is this figure which better relates is resistance to Det - would be interesting to see the difference between the 2!
29 April 2005, 03:55 PM
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The BS number shown on the picture will be: BS 7800:2000 which is for 'super unleaded' fuel with an octane of 97RON+; so that doesnt help much.
Simon
Simon
29 April 2005, 05:12 PM
#79
Live life...my life would be better if i had fitted the 'electronic cak' to my dash in the first place. If i had fitted the KL in the first place i wouldnt have had to spend £2500 on a rebuild.
Im not certain but im pretty sure it would have displayed the det caused by a bodged map and could have quite possibly saved me a rebuild.
I now have a far better map and have fitted a KL. Good bit of kit IMO
Andy
Im not certain but im pretty sure it would have displayed the det caused by a bodged map and could have quite possibly saved me a rebuild.
I now have a far better map and have fitted a KL. Good bit of kit IMO
Andy
Originally Posted by pslewis
Who needs knocklinks and the other rubbish??
I don't know ..... can't anyone drive anymore without the dash looking like an aircraft cockpit??
Just throw it in the tank and drive it, does it feel different? does it pink? is it smoother?
Dear god ...... throw all that electronic cak in the bin and LIVE LIFE!!
Pete
I don't know ..... can't anyone drive anymore without the dash looking like an aircraft cockpit??
Just throw it in the tank and drive it, does it feel different? does it pink? is it smoother?
Dear god ...... throw all that electronic cak in the bin and LIVE LIFE!!
Pete
29 April 2005, 05:52 PM
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I wouldn't waste my money for the sake of security on a standard UK Scooby.
29 April 2005, 06:08 PM
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Wow. This stuff is amazing. I've had a hell of day enjoying all that addtional free power. The spool up is much better, bags more torque with a superior feel to the accleration - much smoother. Like having a Tek4 added to my Tek3!
29 April 2005, 06:41 PM
#85
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Originally Posted by dj219957
Live life...my life would be better if i had fitted the 'electronic cak' to my dash in the first place. If i had fitted the KL in the first place i wouldnt have had to spend £2500 on a rebuild.
Im not certain but im pretty sure it would have displayed the det caused by a bodged map and could have quite possibly saved me a rebuild.
I now have a far better map and have fitted a KL. Good bit of kit IMO
Andy
Im not certain but im pretty sure it would have displayed the det caused by a bodged map and could have quite possibly saved me a rebuild.
I now have a far better map and have fitted a KL. Good bit of kit IMO
Andy
You only 'think' you need all the lights and whizzbang electronic cak on your dash if you **** about with the car in the first place - and you guess it might have saved your engine? It doesn't save anything - it merely tells you that you have fooooked your engine and its now running like a bag of nails!
I've said it before, and I'll say it again, if you start messing about with these cars they WILL bite yer bum!!
Enjoy the frigging thing as it comes when standard ....... or go buy a car that does what you want it to do With regard to the petrol, as I understand it the ECU advances the timing thousands of times a minute until the knock sensor detects pinking then retards slightly, it keeps testing this point all the time - so, keeping a perfect tune.
Quite why you think you need a re-map to run certain petrols is another of these **** Impreza Myths
Pete
29 April 2005, 07:30 PM
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And of course we should all listen to you shouldnt we ??
What drivel
What drivel
Originally Posted by pslewis
So? you had the map played with and it went wrong and cost you £2500?
You only 'think' you need all the lights and whizzbang electronic cak on your dash if you **** about with the car in the first place - and you guess it might have saved your engine? It doesn't save anything - it merely tells you that you have fooooked your engine and its now running like a bag of nails!
I've said it before, and I'll say it again, if you start messing about with these cars they WILL bite yer bum!! Enjoy the frigging thing as it comes when standard ....... or go buy a car that does what you want it to do
With regard to the petrol, as I understand it the ECU advances the timing thousands of times a minute until the knock sensor detects pinking then retards slightly, it keeps testing this point all the time - so, keeping a perfect tune.
Quite why you think you need a re-map to run certain petrols is another of these **** Impreza Myths
Pete
You only 'think' you need all the lights and whizzbang electronic cak on your dash if you **** about with the car in the first place - and you guess it might have saved your engine? It doesn't save anything - it merely tells you that you have fooooked your engine and its now running like a bag of nails!
I've said it before, and I'll say it again, if you start messing about with these cars they WILL bite yer bum!!
Enjoy the frigging thing as it comes when standard ....... or go buy a car that does what you want it to do With regard to the petrol, as I understand it the ECU advances the timing thousands of times a minute until the knock sensor detects pinking then retards slightly, it keeps testing this point all the time - so, keeping a perfect tune.
Quite why you think you need a re-map to run certain petrols is another of these **** Impreza Myths
Pete
29 April 2005, 07:42 PM
#87
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Originally Posted by halowrx
And of course we should all listen to you shouldnt we ??
What drivel
What drivel
If you want the **** answer then listen to the B.O. Scented, lonely petrolheads
Pete
29 April 2005, 07:44 PM
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Originally Posted by pslewis
Of course, if you want the straight answer .....
If you want the **** answer then listen to the B.O. Scented, lonely petrolheads
Pete
If you want the **** answer then listen to the B.O. Scented, lonely petrolheads
Pete
29 April 2005, 07:48 PM
#89
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Originally Posted by halowrx
Funny somehow you conjure up that image not the petrolheads
"Funny somehow you conjure up that image not the petrolheads" ???
No, still don't understand??
Pete
29 April 2005, 07:49 PM
#90
I dont think youve met pslewis have you!
Thanks though. The map was changed for a turbo upgrade not fuel quality.
My point was that KLs IMO are good for seeing det and good IF YOU WANT to modify.
Thanks though. The map was changed for a turbo upgrade not fuel quality.
My point was that KLs IMO are good for seeing det and good IF YOU WANT to modify.
Originally Posted by halowrx
And of course we should all listen to you shouldnt we ??
What drivel
What drivel
Last edited by dj219957; 29 April 2005 at 07:52 PM.