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Old 08-19-2013, 08:25 PM   #1
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What is a good fuel pressure for a MC2100

I have a brand new fuel pump the stock mechanical setup on my 4.2 and I'm running a MC2100 and my new fuel pressure gauge tester says I'm running 2psi and just a hair over 2psi when it's running around 2500 rpm's.

Is this a good psi for my MC2100? The jeep runs great but I just wonder if I had more psi if it would run better or stronger.
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1990 YJ Wrangler 4.2 Inline 6 bored 0.30 over MC2100, HEI

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Old 08-19-2013, 08:30 PM   #2
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no...if you aren't stalling or starving for fuel then you are cool..carb is different from fuel injection..as long as your carb bowl is not running out of gas then you are getting all the power possible from that setup

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Old 08-19-2013, 08:35 PM   #3
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I am running same set-up and have tried different pressures I seem to run better at 3 psi but I am also running at 6000 feet above sea level and a little bit of motor work inside Keep on Jeepin
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Old 08-19-2013, 08:45 PM   #4
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I have a inline fuel pressure gage on mine and FPR. I only show 3psi on the gage, but I have to run the regulator at 4psi or it runs like its starving for fuel. I'm at about 440 above sea level.

My conclusion, better to have volume than pressure for the carb motors. . I'm running a weber 32/36.
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Old 08-19-2013, 08:48 PM   #5
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Just thought I'd check. I just finished fixing my exhaust today and had a bad cat and now she runs better then when I had a cat and now I was just wondering if the fuel psi was enough. Thanks a lot guys.
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What do women and Jeeps have in common? The harder you ride them the more money it's going to cost you.

1990 YJ Wrangler 4.2 Inline 6 bored 0.30 over MC2100, HEI

2013 JK Wrangler Sport
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