36 replies to this topic

[Kevski]

I have a cooper 1.3 spi and was just wondering if using V Power or equivalent makes any difference to the performance.

[Saxo-Fiesta-Mini]

well the car has a lambda sensor and a knock sensor so will advance the ignition timing slightly
so slight improvement in how it runs and small amount of power
to be honest unless its been mapped on 97ron octane not worth it

[Darkscamp]

well the car has a lambda sensor and a knock sensor so will advance the ignition timing slightly

mini's do not have 'Knock sensors', the engine design is too old to incorporate it.

the only thing Vpower will do in an injection mini is clean the engine after repetitive use, therefore giving slightly improved performance.

Although in a carbed mini it can give performace gains through tuning but once setup on vpower, a carbed engine will require Vpower every tank after that.

SFM, please stop giving Misinformation!

[jameswildcooper]

i had mine set up on v power (supercharger 1380 on carb) i put a bit of normal petrol in once to get me to a shell station and it pinked and ran *melon* so couldnt put my foot down at all

[Saxo-Fiesta-Mini]

mis information due to me not knowing the spi doesnt have a knock sensor

i said unless mapped / set up properly won see gains ie i was right

get of ur high horse arse

[lawnmowercrap]

mis information due to me not knowing the spi doesnt have a knock sensor

i said unless mapped / set up properly won see gains ie i was right

get of ur high horse arse

Wow....




I didnt realise you could put arse in a post and the forum wouldnt substitute it for *bottom* or something....



Thats.... AMAZING!

[Joloke08]

Hmmm?????
Ran Boris on it for a while and there did seem an improvement
In Saying that though it was before i got his new exhaust,now im back on 95Ron with a Maniflow DTM and its just as good if not better than when using Ultimate or Vpower with the old exhaust on

As for cleaning the valves etc i just throw a bottle of STP injector clear in the tank every 2000 miles or so when i do services
work out cheaper

Huggz
Jodie

[Pauly]

V power has a high octane rating so the engine has more control over the combustion of the mixture and has less chance of detonating, higher octane fuel will always be better for higher compression engines and also help standard engines, its just weather you can always afford it.

Paul.

[taffy1967]

mis information due to me not knowing the spi doesnt have a knock sensor

i said unless mapped / set up properly won see gains ie i was right

get of ur high horse arse

But you did say a Mini has a knock Sensor, which it doesn't. Not that it's the end of the world though.

Just use good quality fuel in your Mini and it'll run happily.

I've heard that older non-unleaded ready Minis seem to run better on the high octane fuel (with a lead additive or a modified cylinder head with hardened inserts). Where as post 1989 unleaded models are happy with 95ron and don't appear to run any different on the high octane stuff.

Edited by taffy1967, 31 December 2009 - 09:59 PM.

[Kam]

I have a cooper 1.3 spi and was just wondering if using V Power or equivalent makes any difference to the performance.

If you mean that you'll notice on the road? No

Are you getting the full bang on octane rating? You'll never know how long its been sitting there? All the super stuff dont stay super all the time.

[Burnard]

My engine definatly ran differently after useing higher octane fuel. Wether there was more power or not i dont know.

Out of interest, how high could you safley go with a A+ engine?

[Boothy]

Super or vpower burns cleaner and better then normal you wont necessary notice a differance in perfomance.
Fith-gear did a test on 3 cars ranging from a 1.2 clio a Mk5 golf gti and a subaru impreza and they did make a
difference in performace but only to the golf and subaru both forced induction cars.

I arnt saying im 100% right

[Pauly]

Octane has nothing to do with power and 'bang' its how controlled the combustion is. Higher octane fuels will ignite on, or closer to the actual point of ignition, whereas lower octane fuels will detonate/diesel as the piston rises on the compression stroke and heats the mixture.

Thats how I see it anyway.

Edited by Pauly, 31 December 2009 - 11:07 PM.

[Sprocket]

Octane has nothing to do with power and 'bang' its how controlled the combustion is. Higher octane fuels will ignite on, or closer to the actual point of ignition, whereas lower octane fuels will detonate/diesel as the piston rises on the compression stroke and heats the mixture.

Thats how I see it anyway.

That is not quite right.

Pre ignition is what happens if the charge ignites for what ever reason, before the spark has occured. Knock is generated by normal combustion. The flame initiated by the spark causes a rise in cylinder pressure and temperature, A second flame can start at the other end of the combustion chamber by spontanius combustion. This causes a suden rise of cylinder pressure and this is knock, or pinking. Knock normaly occurs at or around 14 degrees after top dead center. Detonation is much the same, but much more severe.

Knock is brought on by several factors, charge temps, engine temps, fuel octane, compression ratio, cam profile and of course ignition advance. All these play together and if you get it wrong, the party wont last long.

Also the charge does not explode or go bang. It is a burn. The difference between the two is simple. An an explosion is an uncontrolled decomposition of the charge. A burn is a controlled decomposition of the charge. The 'bang' in the exhaust is as a result of the sudden release of combustion gasses leaving the cylinder at high pressure, in a similar vien to a ballon going bang when it is popped.

There is more to Vpower than its octane rating

Happy new year by the way

Edited by Sprocket, 31 December 2009 - 11:52 PM.

[Burnard]

Octane has nothing to do with power and 'bang' its how controlled the combustion is. Higher octane fuels will ignite on, or closer to the actual point of ignition, whereas lower octane fuels will detonate/diesel as the piston rises on the compression stroke and heats the mixture.

Thats how I see it anyway.

That is not quite right.

Pre ignition is what happens if the charge ignites for what ever reason, before the spark has occured. Knock is generated by normal combustion. The flame initiated by the spark causes a rise in cylinder pressure and temperature, A second flame can start at the other end of the combustion chamber by spontanius combustion. This causes a suden rise of cylinder pressure and this is knock, or pinking. Knock normaly occurs at or around 14 degrees after top dead center. Detonation is much the same, but much more severe.

Knock is brought on by several factors, charge temps, engine temps, fuel octane, compression ratio, cam profile and of course ignition advance. All these play together and if you get it wrong, the party wont last long.

Also the charge does not explode or go bang. It is a burn. The difference between the two is simple. An an explosion is an uncontrolled decomposition of the charge. A burn is a controlled decomposition of the charge. The 'bang' in the exhaust is as a result of the sudden release of combustion gasses leaving the cylinder at high pressure, in a similar vien to a ballon going bang when it is popped.

There is more to Vpower than its octane rating

Happy new year by the way

Like what?
Im interested to know if its worth useing either Vpower or Ulitimate over the standerd fuels, and why.

What fuel do you run by the way?