Hi All,
As some of you may already be aware I am running a single T61 on my car. Well today I went to have it setup on the Rolling Road again as it's been playing up of late.
Anyway I am using a S-AFC2 and 650cc injectors at the mo and single Walbro pump. When it was put on the dyno the fueling was adjusted and changed a little and the figures produce were quite good - 492bhp at the hubs and 478 ft/lb. No detectable knock at this point and I was a happy chappy.
Then the bad news, when we took it for a road test the S-AFC knock sensor was registering very high readings at + boost. Now I know the sensor on the S-AFC may not be that reliable but the readings were very high and when we listened to the engine through earphones knocking could be heard at high RPM.
So added more fuel across the range and it made no difference, also changed the plugs from IK22 to IK27. Still has not solved it.
So my only other thing to adjust is the timing. The S-AFC however does not allow for this. My question to you all is:
Do I ditch the S-AFC and go for an e-manage or the like. Also those of you who are also running singles could you tell me which plugs your are using and if you have your timing retarded?
Thanks all and sorry for the epic...