I have a newly assembled GT6c engine, which I bumped up to 2.5 L with TR6 crank and pistons. I have retained the CD 150 carbs, engine is running VERY RICH. I have rebuilt both carbs, set the metering needles to the most lean posible, set float level, still running super rich.
Is it possible that the standard GT6 carbs will make a 2.5 engine run rich?