TN454Monte Posted April 18, 2008 Share Posted April 18, 2008 Here's some more pictures of some of other the work I had done this past few weeks. A new High volume Fuel Pump replaced the old worn out OEM unit which was showing signs of failure, remember the fuel pressure gauge on the carb was fluctuating wildly between zero and 6 PSI?? It is now running and showing a steady 8-9 PSI. Link to comment Share on other sites More sharing options...
Monteman1971 Posted April 18, 2008 Share Posted April 18, 2008 Looks great! I have the same pump so now I know what the pressure is...Thanks! Steve Link to comment Share on other sites More sharing options...
kc8oye Posted April 19, 2008 Share Posted April 19, 2008 i put a pressure gauge on my smallblock with a stock-type pump, and i was amazed that pressure could spike as high as 10psi at times causing all kinds of flooding problems... i cured it with a cheap inline pressure regulator Link to comment Share on other sites More sharing options...
TN454Monte Posted April 19, 2008 Author Share Posted April 19, 2008 The guy doing my work is still claiming the engine is running just a little lean. I'm having a hard time figuring that one out, that Demon 750 Should be pumping enough fuel. Anyone want to provide inputs? I'm thinking about moving up to a bigger set of jets to cure the problem. Link to comment Share on other sites More sharing options...
Sam (Bones) Posted April 19, 2008 Share Posted April 19, 2008 my experience with demons has been that they are lean out of the box Link to comment Share on other sites More sharing options...
TN454Monte Posted April 19, 2008 Author Share Posted April 19, 2008 my experience with demons has been that they are lean out of the box Sam, do you think Bigger jets is the way to go ? Link to comment Share on other sites More sharing options...
Sam (Bones) Posted April 19, 2008 Share Posted April 19, 2008 that's where I would start, taking it to a chassis dyno is a good way to tune the carb, but pricey Link to comment Share on other sites More sharing options...
Guest Tech @ BG Posted April 22, 2008 Share Posted April 22, 2008 If it looks to be lean overall then we would advise to go up on the jetting like Sam suggested . Also where do you have the float level set at ? Link to comment Share on other sites More sharing options...
Mo's70MCs Posted April 22, 2008 Share Posted April 22, 2008 For offering support here on our forum! Link to comment Share on other sites More sharing options...
TN454Monte Posted April 23, 2008 Author Share Posted April 23, 2008 If it looks to be lean overall then we would advise to go up on the jetting like Sam suggested . Also where do you have the float level set at ? TECH@BG, Wow! That's very cool to see a company involved in a forum on a technical issue. Right now, The floats were set as per recommendation so the gas level in the bowl is at the mid-point on the sight glass. I noticed several times after installation the car seemed to loose some power in upper RPM after the swap. The shop I had used at the time said I was running too lean. Link to comment Share on other sites More sharing options...
Mike 57 Posted April 23, 2008 Share Posted April 23, 2008 More Jet! Link to comment Share on other sites More sharing options...
Sam (Bones) Posted April 23, 2008 Share Posted April 23, 2008 I'd start with 3 sizes up at all 4 corners, maybe even more if notice it falling off at the high end Link to comment Share on other sites More sharing options...
Guest Tech @ BG Posted April 24, 2008 Share Posted April 24, 2008 Originally Posted By: Tech @ BG If it looks to be lean overall then we would advise to go up on the jetting like Sam suggested . Also where do you have the float level set at ? TECH@BG, Wow! That's very cool to see a company involved in a forum on a technical issue. Right now, The floats were set as per recommendation so the gas level in the bowl is at the mid-point on the sight glass. I noticed several times after installation the car seemed to loose some power in upper RPM after the swap. The shop I had used at the time said I was running too lean. Defnitely go up on the jetting a few numbers and see how it reacts. If it likes the first jet change then go up again. Link to comment Share on other sites More sharing options...
TN454Monte Posted April 24, 2008 Author Share Posted April 24, 2008 Hey everyone, Thanks for the tips, I'll order a jet kit from BG and see what happens then I will write something up and let everyone know what I find out. Thanks again!! Link to comment Share on other sites More sharing options...
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