So I finally broke in the 327 I built this weekend with pretty good success. The engine ran well enough to survive the 20 minutes if can break in but it was obvious that further tuning is in order. I noticed that the rochester 2g carbs on my 3x2 (dedicated primary with outer carbs converted to secondaries) were leaking fuel outside of all the gaskets. The rear most carb was dribbling gas so I replaced the float, needle and seat. His did not resolve the situation. My fuel pressure gauge wasn't functioning, I drained the fluid out and still no dice. I am running a holly 1-4 psi fuel pressure regulator and this Holley fuel pump: http://www.holley.com/12-327-11.asp I am thinking that he volume is overcoming the capacity of my fuel system. Does this make sense? I can't see how the carbs would leak so much otherwise. The carbs seem to have been recently kitted and are clean. There were no obviously loose fasteners that I could find which would have contributed to the leaking. Insight and advice is greatly appreciated. Posted using the Full Custom H.A.M.B. App!
If you have one of those chrome dial pressure regulators, get rid of it. Score a decent regulator and gauge from Summit or whoever and set it about 4 or 5 and see what that does. Also, your float level will do what you are describing. Take the carb top off, flip it upside down and measure the float. The measurement will be specific to your carbs which you will have to ask someone smarter than me for that info. There is also a measurement for float droop, but again, I have no idea what that number is. Sorry. Good luck, -Abone.
Yes I ditched the dial regulator in favor of the Holley with the Allen wrench adjuster. My float is set to 3/4" and 1-3/4" drop Posted using the Full Custom H.A.M.B. App!
your float setting are right, pressure no more than 4 lbs. should be ready to go. Lately I have been just running the center carb and blocking off the out side one's. Runs better, no full running down the 2 outside carbs, and still looks cool. good luck
I think my pressure should be 4 or below. My pump puts out 110 gph so I'm wondering if that could be the issue. I've never seen fuel saturate gaskets and leak out like this before. Posted using the Full Custom H.A.M.B. App!
I have my fuel pressure down to 3 P.S.I. and my dad lowered the outboard float levels to the lowesr setting on the spec sheet. It still weeps a little, but not near as bad as it did at 348 tri power settings.
I replaced my seats with Grosse units that I got from Larry Fulton in Montana and it made a big difference.
I will check those out. Does anyone have the opinion that aside from fuel pressure the HIGH VOLUME fuel pumps (110 gph in my case) can be the culprit as well? I'm think of getting a stock pressure volume pump and seeing how it goes, I just don't want to keep throwing money at a problem. Thanks all Posted using the Full Custom H.A.M.B. App!
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