baldrickbluescoob

I have just bought a 95 WRX import, that as far as i know has not been remapped to run on uk fuel, my question is how much octane booster are you running? I use Silkolene Octane Booster in my MX bikes but don't know what ratio to run in the car.
Any help greatfully received

Dav 27

Well ive had a 95 import for the last 3half years , and as far as i aware the ecu in the my95 is a z4 ecu which is as close as a uk type as your likely to get , personally ive ran mine on optimax without any o/b , so cant really answer that question , but i think the best thing for you to do would be to replace the ecu with a mappable type ,which will also give you more safe er power ,which i,m thinking of doing meself, but after a £2.300 engine rebuild ,im abit low on cash at the moment , as youve guessed there are expensive when they go wrong

stressymare

i got a 94 wrx had it for 12 months now

always had a flat spot untill last week wen i put o/b

in it for the first time

omg how smooth is it now lol

i just bought one from Halfords as i didnt know which one to get

TonyBurns

iTrader: (3)

1 bottle of millers octane plus per 50 ltrs (ie 1 tank for me )

Tony

myblackwrx

iTrader: (1)

If you have a z4 ecu it should be happy on V-Power or Tesco super (99ron), i have a a z4 ecu in my 93wrx and just run it on the above fuel and its fine.
But if you do use octane booster it normally says the ratio of OB to fuel on the bottle.

don81

ive got a 96 import which ive had since feb and i run mine only on v power before that optimax. i only use shell station petrol. runs sweet on that.

Jap Import

Snap.

Use to use OB with Optimax but just run on Ferrari fuel now

No flatties, nice n smoothe

baldrickbluescoob

Thanks guys
Just one more question does it say on the ECu what typr it is?? Haven't looked yet.

myblackwrx

iTrader: (1)

passenger footwell, pull back the carpet, take the plate off and underneath is the ecu and right in the middle will be a letter/number (e.g. U8, W6 etc)
You will most probably have one saying Z4

jaytc2003

iTrader: (1)

my93 on u8 ecu quite often ran on morrisons 95 unleaded with some hard driving with only green on the knocklink.

If you do change your fuel on the earlier cars, then reset the ecu after you have done it as if you use poor fuel the oe knock sensor will knock back the ignition timing therefore losing you some power and Iam sure that it doesnt advance it again like the newer cars.

TonyBurns

iTrader: (3)

It doesnt knock it back as well either
95 ron WILL kill a wrx import mainly because it just cannot retard it down that low, you may think you see just greens but does your knocklink work fully to the red? and even then when you get knock it can be that quick you dont catch it.... (mainly in gear about 4-5k rpm)

Imports need 97 ron minimum (early cars) and ob is advisable

Tony

Jap Import

Personally I would'nt run any performance car on standard unleaded.

After making contact with some friendly people over in Japland and having them do a little research I can confirm that 100RON was'nt available to JDM until the late nineties, prior to this it was rated at 98RON.

For the earlier classic owners (MY94/MY95) Super would probably be fine, with the addition of OB just for a safeguard.

rossyboy

iTrader: (8)

IMO you're just throwing money away by putting OB in on top of V-Power or Tesco 99 RON with 92-96 WRXs.

My car never saw any OB while it had the OE Ecu on Optimax or now that its mapped for 98+ on the Apexi.