Hi,

I live in Brazil, where most tuners, use ethanol set up, we have a ethanol hystory, since mid 80's. As it is a colder fuel, and high octane, you can add lots of timming.

As we have a "better" gasoline right now, that is 98 IAD (RON + MON /2), I choose to tune my car on gasoline, but I'm having some issues and doubts.

Here is my set up

Wiseco Pistons
Pauter Rods
HKS 1mm Head Gasket
Oversized ferrea race valves
Brian Crower springs and retainers
272 Comp cams
HKS 3037 Turbo Kit
1000 CC injector clinic
walbro 255
Perrin fuel rail
Stock FPR
Stock ignition
AEM EMS UEGO
Stock Intake manifold
3" turbo back no cats



Sometimes I have something that seems a missfire at high RPM with high load (23~25 PSI), and my AEM reads it as a Knocking (+- 2.3 volts), but I really thinks that it is not knocking, because my tune is very very conservative at this point, like:

0.76 Lambda, with 6 degrees os timing under high load and 10 degrees over 6500 to 8500.

Can someone help me ???

I have some logs in my laptop, that i can post, but don't know how.

best regards, Eduardo

 

no one ???

Need help please !!!