Guys,
I have a 95 WRX with closed ech 2.2 engine uprated fuel pump etc, it's got an SBC dual solenoid boost control, it's running 1.2 bar on 97 ron and the knockling flickers on the second green light, the other setting on the controller go up to 1.4 bar and 1.6 bar would i be o.k running 1.4 bar on v-max or tesco 99 ron i have tried this seeting bit knockling has a bit of a fit !!
What do you all think ?

Regards
James

 

When you say the kl has a fit are you talking amber and red activity indications?

 

yes a bit of red action but only at very high revs @ 1.2 bar no probs what so ever !
It's only on 1.4 bar it gets a bit animated !

 

not suprised really. thats quite a jump in boost pressure.
How has the car been mapped i.e what ECU ?

 

if your car isnt mapped for it then its not getting the correct fuelling.

 

Guys just to confirm the car has been mapped to 1.4 bar but I think it was on optimax or 99 ron , if i fill up with optimax again will i need to reset ECU before changing the boost setting back to 1.4 bar again !

It has been running this boost level with no probs up until i couldnt find any 99 ron !

 

What ever fuel you had in the tank at the time of the map thats what you should be using. Including any boost additive that might have been in the tank as well.

Although your running high boost you should have no more kl activity at that level as you would do the lower boost of 1.2 bar.

I'm running 1.2 bar and see the first green from time to time, very occasionally the 2nd green and if i miss shift an amber or if i've made a right mess of things the red.