I was suggesting the throttle stop because I thought trying to keep a constant vacuum would mean working the throttle and hence engaging the accelerator pump. But in your logs I don't see this problem, AFRs are pretty constant. Did you disconnect the accelerator pump?
Quote: If you hold the throttle steady, the vacuum will rise with increasing rpm. So you'll not get the high load/low vacuum data in the higher rpm range.
Not even at WOT? I was thinking you could vary the throttle stop from 10%-100% throttle.
The problem I have with connecting rpm is that it's impossible to read, it's incredibly spikey. And it also makes the AFR spike. I think it's electrical interference and the rpm converter not being able to handle it. There are some threads on how to solve it on the innovate forum. I'm sure you've seen it, it involves making a pre-conditioning board to make sure the input voltage doesn't go above 5.0 Volts. But like I said I have not tested it yet.
Quote: I'm no longer using the rpm input, but the frequency channel set for rpm.
Any reason for using the frequency channel instead?
Quote: The Mike Urich and Bill Fisher Holley book is definately worth buying.
I've got the Ulrich & Fisher book on Carburetors, Manifolds and Fuel Injection as well as the one by Dave Emanuel. The Ulrich & Fisher is better for tuning.
