Vpower - how much difference on....
Discussion
E21_Ross said:
any ideas (roughly) what Vpower and the like will give in terms of a power advantage over regular fuel on an E92 M3?
cheers
Why do people think a different fuel will be like running a nitrous kit or something?? cheers
Actual HP gains on most cars, unless FI (and then only if the ECU is capable of dynamically changing maps) will see only marginal gains if they aren't already tuned to run on higher octane fuel.
What you should notice however is often a crisper throttle, smoother engine and a more willingness to rev compared to 95 octane. But again these can be subtle, not slap you in the face differences.
I also find higher octane fuels usually return slightly better mpg figures too as a rule.
Can't comment directly on the M3, but I suspect it's clever enough to make some use of it. But I don't think it'd really make the car any quicker unless you are timing down to hundredths of a second.
Pork said:
I can't answer the question specifically, but on previous M's I've run (E39 and E46x2), I've always used 'super' if for nothing else but to stop the engine pinking - the M5 was terrible for that!
Were they supposed to run on superunleaded though? Many higher tuned n/a cars and a lot of performance turbo cars require superunleaded for this very reason.If the car has a knock sensor then you can run lower grades and the ECU will retard the timing, but you'll lose ponies in the process. In such a situation returning to superunleaded WILL see fairly noticeable HP and performance gains.
If you don't have a knock sensor then you are putting your engine at risk and it'll do damage. Just ask anyone with an Impreza P1 and they'll tell you how much an engine rebuild costs due to running lower grade fuels.
300bhp/ton said:
Were they supposed to run on superunleaded though? Many higher tuned n/a cars and a lot of performance turbo cars require superunleaded for this very reason.
If the car has a knock sensor then you can run lower grades and the ECU will retard the timing, but you'll lose ponies in the process. In such a situation returning to superunleaded WILL see fairly noticeable HP and performance gains.
If you don't have a knock sensor then you are putting your engine at risk and it'll do damage. Just ask anyone with an Impreza P1 and they'll tell you how much an engine rebuild costs due to running lower grade fuels.
IIRC, they can both run on both. The M5 was certainly the more noticable of them all.If the car has a knock sensor then you can run lower grades and the ECU will retard the timing, but you'll lose ponies in the process. In such a situation returning to superunleaded WILL see fairly noticeable HP and performance gains.
If you don't have a knock sensor then you are putting your engine at risk and it'll do damage. Just ask anyone with an Impreza P1 and they'll tell you how much an engine rebuild costs due to running lower grade fuels.
Evo ran their entire fleet for 12 months on one or other of the high octane fuels.
Most engines benefited from a few extra BHP, others didn't - it depended on the ECU.
What they ALL benefited from was the improved detergents - there was a remarkable difference internally when they stripped the engines down at the end of the test.
IIRC the conclusion was that on balance it was worth going down the high octane route for the cleaning alone with the added benefit of slightly improved performance on most cars - but you have to use it regularly for the cleaning - at least once every 2 or 3 fills.
Most engines benefited from a few extra BHP, others didn't - it depended on the ECU.
What they ALL benefited from was the improved detergents - there was a remarkable difference internally when they stripped the engines down at the end of the test.
IIRC the conclusion was that on balance it was worth going down the high octane route for the cleaning alone with the added benefit of slightly improved performance on most cars - but you have to use it regularly for the cleaning - at least once every 2 or 3 fills.
Tonberry said:
Why buy a performance car if you have no intention of getting the best out of it?
It's like settling for Glens vodka when it tastes like s
t although you know you can have better with a little more outlay.
Not quite as Glens will also end up giving me an hour's memory blank and perform as well as any other It's like settling for Glens vodka when it tastes like s
t although you know you can have better with a little more outlay.Gassing Station | General Gassing | Top of Page | What's New | My Stuff