Quote:
Originally Posted by supremeefi
The EZ will work, just ask Greg Weld.
But it runs richer in areas than is optimum. To mask drivability/tuning issues the IR's normally like it when you throw more fuel at them.
But with that said, neither the EZ or even the XFI are able to tailor the fuel curve between each stack as related to load and rpm, it's all or nothing.
With the Accel you can trim each cylinder by load and rpm. Think about it, if you have a butterfly imbalance, where will it show up more, at small or large throttle openings?. The answer is small, but if you can only change the balance with one setting you're losing tuneability and throttle response potential throughout the rpm range. I gaurantee you the difference in fueling requirements from idle to wot changes, you can't address that with the EZ or XFI. That's why you need to run them richer than if you had that tuning parameter.
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good info Mark. My IR setup was perfectly happy being lean at cruise but really liked a richer idle a/f, no matter how I adjusted the blades. Had a big solid roller too which affected that.
How does an average guy monitor each cylinder individually to take advantage of this feature? I can see that on an engine dyno with headers that have pyro's or a/f bungs at each pipe. I'm thinking most of the guys never get their engines on an engine dyno and do their tuning on a chassis dyno or on the street and wouldn't have that type of exhaust to be able to individually monitor a cylinder. Would an infrared temp gun on the tubes give enough info? I do remember that feature and played with it a little, but I didn't have a real good way to monitor things other than a temp gun. This was a blown small block, not an IR setup but we were chasing a problem.