I am looking at some advice here.

I use 95 Ron petrol and have always done this, but I am looking for a small improvement in performance and fuel, so should I go for...

vpower or

keep 95 ron and upgrade to a cosworth filter?

Also can't afford both before you say it!

As it's a UK car, it's set up for 95 octane fuel so I would stick to that. Therefore, my choice would be the filter. If you want to go for higher octane fuel, it will probably need mapping, which would actually bring the best out of the car

agree with TLag - stick with 95 ron and go for the filter... and then an exhaust, and then a new fuel pump and then injectors and then a bigger turbo and then a remap and theeeeen you go for the V power :D

 

dont forget the photos ;)

thats interesting was expecting the other way going with v power.

mod wise i the only thing i would go for is the filter, otherwise it is best starting with a different car.

the bhp & torque is adequate, but its just me i just want a little bit more. in fact, I did want to buy the 3.0, but the mpg was too frightening, otherwise it is an awesome performance car.

I always thought the ECU would learn with the fuel in modern cars.

I think they will learn to a certain extent. I think they will happily cope with higher octane fuel on the odd occasion but the benefits gained from that fuel will only be the cleaning benefits as it runs through the system. The car may also become smoother but I doubt you will see any performance benefits.

At the end of the day, whether the car is an STI or a Justy, if they are UK cars, they are set up at the factory to run best on 95. JDM cars are a different matter entirely. In Japan, the cheap fuel is 101/102 octane so that's what the cars are set up for.

I knew it wouldn't gain more power from it without the remap. :( 

 

I think we need to start to get some people smuggling Japanese fuels into the country :D 

I thought remaps work on turbo only cars.

I had one done on an a6 1.8t from colins motorsport, went from 150bhp to 190 on front wheel car, the traction and rev counter went beserk!

I know some people do have them done I have never seen the point for what little can be gained from something that costs that much.

i wanted it at the times i was doing a lot of A1 driving and needed a bit more as the a6 was a heavy car.

it worked only for a few months, then i didnt need to do the trip- £370 !Removed! wasted, mind you it was very easy to sell the car!

Most cars can mapped. It just varies on what is required. It's true that most Subarus tend to get mapped for performance but you can also get cars mapped for economy or a different fuel octane. It's a lot of money just to be able to use different fuel though.

I think the filter is the way to go.

I think there is so much that u can do with a NA engine and I dont want to spend more money on the car than its worth.

In future, I may look out for a 3.0 spec b with lpg!