· Short and stout
My buddy and I have been trying to get his 70 aqua craft running right. This thing has a Chevy small block 406 in it with a victor Jr. man. And a Demon 750 Carb. The problem that we are having is this thing keeps running out of fuel pressure at WOT. This has brand new Imco side tanks in it with billet gas fill caps. The fuel pump is a Holley Black 140 gph electric. If we cruse around its fine. When you stomp on it after about a seconds or two you can see the fuel pressure gage start bouncing from 7pounds to 3 pounds until it hits 0 pounds as this only takes about 5 secs of WOT. I notice that the new tanks are not vented as the gas caps have to very small holes in them. I was wondering if there could be a vapor lock going on. The thing is when you let out of the peddle for a little bit it will catch back up. This pump has ran a big block with no problems in a jet so I would think it would run this thing. Don’t know. Any help would be greatly appreciated.