Quote:
Originally Posted by camcojb
I wasn't speaking of the EZ. I've only done one of those, and it doesn't work for the combo (750 HP 494 Cammer Nascar twin throttle body engine). I made several changes to get the vacuum up, but being rich is not the issue...............
Again, we're just discussing your claim that the reference line must be used. I was speaking of all EFI, but even with the EZ Efi I'm not sure I agree. It's obvious many people have them running fine without it. Is it a good idea to help it self tune, apparently so. A "must"......... no. I have tuned too many EFI systems without it to agree.
It's all semantics. When you speak in absolutes you'll invite people to give examples that contradict what you're saying. If you said that the system is designed to have the reference line attached, and it helps the computer learn the tune much faster, I don't think that anyone would disagree with you. It's the absolutely "must have" wording that doesn't fly, because we have examples of that not being true.
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So you agree how it works... but since I explained why it is the right way to do it... and since you can make it work the wrong way then... it's not necessary? Come on. I can make an engine run with the .008 piston to wall clearance... does that make it right? No.
Look at all the OEM pump engines that don't use PWM pumps and they all have vac referenced regulators... OEM changed to that in the early 90s.
It is an absolute. Must have and the right way. If you don't agree then you are saying the injectors should flow more fuel at part throttle.... and you already said that isn't the case. Besides how hard is it to hook up a vac line?