Quote "Mike I have a very similar bypass regulator and run 2 1150's. at 8-9 lbs fuel pressure i will run them dry and the motor will lay over. I am running 9-10lbs boost and the fuel pressure only raises about 1 lb, not much. I bumped up the presure to about 15-16lbs and it does not blow the seats at idle and seems to do just fine. When I run it wide open for a long run it will fluctuate slightly between 15 and 18lbs, and will run great with no problems and does not run out of fuel. I switched the pullies one time and made more blower pressure but when the boost came up the blower just screamed and went no where. I did this a few times until I realized what wass happening. When the boost hit 13psi the referrence regulator would go 1-1 and the fel pressure would spike and flood the engine. The fix was to simply remove the vaccum hose and run it again. It ran great after the line was removed. With the boost you are running I dont know if the regulator is in fact going 1-1 or if it is slightly raising. Maybe try to raise the pressure and disconnect the reference line."
I have heard or read (don't remember where?) that gas starts to foam after about 11 psi? Does anybody know at what pressure it does foam?
It would seem to me that if it is foaming at 11#'s or so that the bowls would not be filling adequately with gas.
I have two 1150 dominators on a 572cu incher with a bds blower and worry that my carbs are running out of gas on a 1/4 mile run. Am considering referenceing my regulator to get more gas pressure (currently 7and 1/2#'s)
Also I am thinking of increasing my boost from 6#'s to 11#'s for when the bad boys come around. Is it necessary to increase the jetting to accommodate more boost?
Kojac