This should possibly be in a seperate post but I think your topic of discussion may apply to my questions. A friend of mine has a 2850# door car that has a 460” BBC on Alcohol and runs 9.30-9.40’s @3500’ and 9teens @ sea level. It has never ran quite as good as we feel it should. He is using his existing gas delivery system, a rear mounted BG400, ½ line @ 28#’s to the front of the car, regulated to 11#’s dead headed at the bowls. It drops to about 9 #’s though the top end. The EGT’s are always over 1200c at the 1/8 th and 1300 to 1320 at the ¼. The probes are 4” from the header flange. It has an out of the box 1095 Alcohol Demon, but he recently went up to 200 mains. The car picked up a little but the EGT’s are still hot. It has allway had a slight flutter at the top end (even after freshening the motor). Do you think that it is still a bit lean on the main, or is it possible that his gas based delivery system isn’t keeping the bowls full. I would think that 9#'s is 9#'s.
Details of the powertrain: 335CNC AFR heads, Reher-Morrison Super Victor CNC intake, 1095 Demon Alcohol carb, Bullet roller .830/.775 283/294 110LC in at 108ILC, 13:1, 38degrees total, 2 ¼”X28 3 ½”collector, 1.80 low gear set, 4:88 rear, 103 rollout tire, 7500 through the lights.
What do you think of the 1095 Demon on Alcohol. Do they work well out of the box, or is it worth the money to have it reworked by ProSystems or Rupert or ??? Would a Holley reworked by one of these guys perform better? What about a smaller plenum intake (ie RM Funnel Ram) to avoid puddling. Smaller 2 1/8” primaries”.
I like the vacuum to the regulator spring housing idea. Way to simple. We will do the reg mod for the weekend, and he has bigger mains coming as well. Just looking for some suggestions for down the road.
Thanks Tom