Just wondering as I recently bought an STI RA Ver 2 but have been running her on a strict diet of V-Power only. Will this be enough or should I be using an octane booster too?

 

version 2s should be fine on v power, someone correct me if im wrong but japs went to 100 octane fuel in 1996?

 

Should be okay. Has it been mapped for UK fuel? Later STI's need to be mapped for the lower octane fuel here in the UK, but IIRC Japanese fuel of the early-mid 90's was a lower rating anyway. I'm sure someone will either confirm or shoot me down in flames lol!

 

Nah mate it hasn't been mapped for UK Fuel yet. The car has only been in the country since July last year and I know the previous owner didn't have this done.

 

Think it was 1997 iirc, think the V3 was just out at the time..

 

It,s worth getting it mapped anyway to release some extra ponnies and just to be safe..

 

Jap fuel at the time your car was made was less than VPowers 99 ron mate so would do no harm.

 

Hi guys, i have a 94 wrx type-ra

would i need to use octane boost in this with v power and would it harm the engine.

cheers, john

 

v-power should be fine in v1 and v2 sti. v3 jdm sti run a more agressive map and benifit from a remap. v2 sti map is very simular to the z4 map i think.

 

v2 sti map = ppp map
z4 runs slightly less boost.

jonboy i use v power or tescos 99 ron and it's fine.The early cars were released befor 100 ron fuel was.

 

Just out of interest, does anyone know what ron fuel was available in japan pre97?

 

i dont think anyone can answer that, its been asked before with no clear answer.
stick to v-power and youll be fine.

 

Tesco 99 Ron innit!

 

Whilst youre right about the fuel, Id suggest erring on the side of caution with an STI or STI Type-RA.

Simon

 

'Premium' was equivalent to 98RON.

 

Ta mate

 

Don't they give the owner the option of puting in 100RON or a lower grade fuel in Japan? Don't they say 98 RON recommended here, but you can use 95...

 

Hi Baz hope you are ok the guys on here are right v-power will be ok unless you are going to run bigger boost.Remapping will release more power.i suggest having a word with JGM Simon will explain.Good Luck