My tach signal doesn't go haywire... At least not anymore. It would lose the tach signal when it hit the redline on previous tunes, which, in my opinion is no good. The car should remain to be limited by the Fuel computer, not the Spark computer... If you're losing spark that means that the limiter in the EZK is set lower than the limiter in the ECU. I'd prefer to have it the other way around.Haven't really noticed any change in mileage, though I've still got that wonderful 'knock retard' issue that my car has had for years. One of these days I'll swap the flexplate...
I jumped on it today on the freeway, got a clean pull with 10.8-11.3 AFR's, as the speedo quickly passed 80 in second. It's kinda funny winding it up to 6800...the tach kinda starts going haywire!
Otherwise I'm still getting around 18 in town, haven't done any real long trips to get highway mileage yet.
I'll bug Andrew to post up how he likes his...
With my last tune, I was limited by the spark between 6800 and 6900. Now I'm limited by fuel at 7500rpm, as I should be......... Not going there again until I have a new head and bottom end!!! That being said, the car runs a little richer than optimal above 6000rpm, but that's likely because the engine isn't flowing air anymore.
Regarding gas mileage, mine seems to have gone up a smidge from the last setup I had. Although power below 3000rpm is lower than the B/A/IPDT cams with this RSI cam, gas mileage with the latest ignition chip's advance curve seems to be about the same if not better. I'm definitely using more throttle and rpm than I used to in normal driving... Maybe because the car isn't making as much power, the larger throttle openings are helping out? Who knows. But I got 19.4mpg and 21.0 and 20.4 the last three tanks. None of which were all highway driving or "slow" driving. This current tank I'm trying to actually go for gas mileage with my normal commuting to see what I can do. That being said, for a while before that it was down in the 30s every day. Still, 18-19mpg was the norm for similar driving habits. I'll be going down to Davis next weekend, so we'll see if I can manage over 25.8mpg which is my best ever over the past 3.5 years.