Quote:
Originally Posted by vagthomas
O2 Sensor was confirmed with external one. MAF was calibrated..Curve was completely out of logic. There are no any leaks, anywhere. Air and exhaust system were thoroughly checked. With MAF calibration and fuel trim optimisation the car went 166 whp (as was mine initially). I do not think that something is wrong. Engine is running much more smoothly now.
Any further ideas for checkings would be most welcome!
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There are a number of places you could have leaks from the intake. E.g. the crank case vent hoses. Did you check those as well?
I would unscrew the MAF sensor take it out and clean it.
And I would look for a tuner that has experience with the FA20. There are lots of reputable remote tuners if you don't have anyone where you live. Dyno tuning a stock car is really a waste of money. And especially so if the tuner doesn't know the engine.
Quote:
Originally Posted by -Willis-86touge
Probably because his front pipe wasn’t creating the backpressure a stock system has, inturn computer compensation was inaccurate!
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A 4 stoke engine doesn't require back pressure. The less the better. Anyway, the biggest restriction on the GT86 is in the header.
A 2 stroke does need it because it has ports instead of valves. So it needs back pressure to keep the fresh charge in the combustion chamber.