Injection Help. Anyone?

I have a 427 chevy that I put a enderle stack injection on. It has a Hilborn 150a-1 pump 38 nozzels for alky. I am running a 105 pill in a kinsler pill holder. Have even tried a #90 pill. It has #10 line from tank to pump. Barrel valve was set at 30% leak down. My problem is it leaves the line hard but at high rpm it surges very bad and has no power. Also the left head at the front gets very hot(you cant touch it after a pass) but the back cyls. of the same head and the right head are not hot. #1&#3 plugs look clean but all others look rich. I am sure no nozzels are plugged as I have cleaned them and can see fuel comming out when the motor is runnung. (The nozzels are above the butterflyes) Will a vaccume leak cause this? To small of line from tank to pump? I am about ready to put a carb on it. Sorry for a long post just thought I might get some help before I loose my mind. or blow up my motor. Thanks for any advice.

 

First of all,you need a larger line. -12 is min,but -16 is preferable. What is the pump flow and what is the system pressure?Without pressure, it cant atomize the fuel. What egts at idle?Do you use a secondary? What is idle check set at? what is comp? What lobe seperation? Gear and tire? .038s sound big and i am only getting around 59 lbs system pressure.With .033s i get 105 and .119 main and .040 hi speed@80lbs. Aerated nozzles? This is if the pump is puting out at least 6.3 gpm. If the pump is either too small or down on flow, it will run out of pump and cause the engine to go lean once it leaves. Launch rpm? Shift rpm? finish line rpm? Does it idle correctly? Does it start right away?

 

Comp is 14-1,pressure and pump flow I don't know just bought this used. Do not use a secondary bypass. Launch is 5000 rpm fall's on its face around 6000 rpm. 33 inch tall tires with 4.30 gears. 60 foot times are all around 1.35. 1/8 mile is 6.001-6.132 on all passes but then looses power before 1/8 mile then shut it down. I think I will try a bigger line from the tank since mine is obviusly to small. Thanks for the input.

 

If the line makes it worst, you have a condition that took me a long time to solve, that is that the motor is SO LEAN there is`ent enough fuel in the motor to burn and every thing looks like it`s rich, also you have to have a big enough tank vent to acomadate the fuel line, i like the same size vent as the fuel line you are using. Ok, thats my nickels worth!!

 

If you dont get your pump flowed along with nozzles,your p***ing in the wind.I went thru this once as the pump was only an 0 instead of -1.Even enderle tagged it 7 which i knew they didnt flow it as thats only the rating and i fought it for a half dozen passes and finally got down to an .085 frm .135 where it should have been had it been 6.5 gpm. It couldnt get enough pressure to even open the hi speed and not enough at idle to open the idle check.

 

I think I will take your advice and have it flowed. Thanks! also I don't think my vent is large enough. Thanks again this gives me a direction to go.

 

If you take .000021367 X 427= .009123709 as an average area. It comes up between a .034 and a .035 nozzle. If it was me, id put in a .034 or a .033 depending on the pressure. And get a bigger inlet line on the pump.

 

Hello Leon. How do you figure out the system pressure by using the nozzle size?

Thanks

 

I will add a couple of things:
1: The BBC heads valve arrangement results in having an exhaust at one end of the head and an intake at the other. The old hand test will be misleading if you are trying to check two heads at the same end.
2: It has not been mentioned but have you retightened your manifold and not readjusted the butterflies?
Butterflies will need to be adjusted individually and then matched up side to side.
This adjustment will change your idle and part throttle characteristics so resetting the BV will be in order. BV leakdown is whatever works when you are done setting it to your satisfaction. The number then becomes your baseline.
PS: Butterfly checking/adjustment will be necessary every time you pull and reinstall the manifold.
Have a safe race
Dave Koehler
www.koehlerinjection.com

 

I was using my hand to tell if it was hot. I never thought of the valve arangement. I have retightned the intake bolts. Thanks!

 

once you retorque the bolts you have to check each throttle butterfly clearance. they should all be the same, set at .003"-.004". this clearance should be checked anytime you reinstall the manifold, then check it after a couple of heat cycles (a good pass or two)
frank