2 step fuel bypass

Hey guys just put an electric solenoid on my car to bypass excess fuel when on the two step, not sure what size pill to start with I don't want to go to lean and hurt something when the BV is wide open while on the two step, it's a conventional headed 555ci BBC with a very good HH 14/71 will probably be OD it 39% it has an Enderle 990 pump (15.8 GPM) and will have the two step set at somewhere between 4000-4400 rpm . Any input is greatly appreciated, thank you!

 

I don't have a fuel flow sensor but would like to add one soon but thank you mike.

 

I have a poppet connected to the back of the hat D-block and plumbed it to a solenoid valve mounted on the side of the blower. I put a 30# spring in the poppet so that with the valve open, the hat always has a minimum of 30# fuel pressure and is still adjustable up and down of course. I don't even HAVE a pill in it.

 

Yes, a two step lean out. I am still trying to get a handle on my tune up and I find that the poppet with a set minimum pressure makes it easier for me to find the right amount of lean out without trying different pills. It works for me, may not be how the pros do it.

 

Seems like the purpose of the pill is to limit how much fuel pressure is in the hat during twp step, the poppet does the same thing without depending on a pill being correct or a pump loop being correct or whatever.

 

So, the pill does not limit fuel pressure while on the two step?

 

And/or the lean out valve pill does not limit fuel pressure while on the two step???

 

To me, bypassing fuel and/or limiting pressure is hand in hand. One goes with the other. Maybe it is just my stupid country boy "find a way to make it work" way of thinking.

 

Considering doing something like this myself.
At .7 seconds (868 average egt, with .73 fuel flow, @1700 rpm) prior to the release of the brake, the throttle /barrel valve go to wot (delay box car).
At the release (736 average egt, 5.80 fuel flow, @ 4000 rpm. ) for a 132 degree reduction of average egt.

 

As of now, I tune by what my motor is happy with and what the ET slips tell me. I have no flow meter and not going to invest in one. As I said, this is what works for me.

 

D Rotor PSI With converter, what fuel flow should we have at idle?? (1800-2000) and at stage (3800-4300)??