Quote:
Originally Posted by camcojb
I've done a few 700-850+ rwhp cars with the regulator in the rear. Haven't broke one yet, and I'm not afraid to drive them hard. I had one that broke after I sold it, but that wasn't due to a rear regulator; that was nosing it over with an EFI tank that wasn't baffled well enough to work at 1/2 tank or lower with the acceleration of that particular car. Those were boost referenced though, so you'll be happy about that. 
My Cobra was n/a and had a front regulator, but still no reference line. Ran fantastic. All of these cars had O2 bungs on both sides and the sides were always within a couple tenths in A/F; nowhere near a full point difference. That was with comparing the computers wideband to the in-dash wideband gauge, to the handheld Innovate.
As far as fuel taking the path of least resistance, it seems like you'd see the pressure issues on a gauge. I have the gauge on the rail, and on the regulator, and I am not seeing any movement, fluctuation, or dropping pressure on mine.Seems like the regulator is working fine if the pressure is dead steady, a/f basically match side to side, and the car runs great. I do not doubt what you've seen, just that I do check and don't see it on mine. A/F differences from side to side can be due to heads, intakes, etc. as you know. Interesting that you've seen a difference with just moving a regulator. I've just been doing it a different way and my stuff runs good and doesn't blow up. And I never do a mild engine................ 
Again, it's just the "must" wording that I cannot agree on. |
Put 8 O2 sensors in the headers then tell me how constant they are, especially on a bank to bank EFI system. Moving the regulator from one at the end of the one rail to a setup with a y feed in and out made a huge difference. Two collectors are just an average of 4 cylinders each. You can have two really lean and two really rich and wouldn't even see it.
If you really think you will see pressure drop on a gage you are kidding yourself.. you lose fuel flow long before it actually hits the gage. By the time the gage actually moves you are OUT of fuel.