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OPINIONS WANTED: Carb vs. Fuel Injection

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Old 09-18-2002, 03:10 PM
  #11
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DonMan,

Can't get better response than that!
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Old 09-18-2002, 03:27 PM
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Quote:
Originally posted by Dennis Moore

Switching to a carburetor on a marine engine would not lose that much fuel economy (not like a car)


If you are interested in fuel economy do not use a Holley


I`ve got to tell you Dennis, you always come through with good, sound advice! You have told me exactly what I have wanted to hear, but no one else could explain. I agree with the Q-jet choice, just a matter of finding one. I will most likely go with the Edelbrock carb for simplicity. I believe I would rather buy a Performer or RPM intake, just for the weight savings (ever lifted a cast iron big block intake?). You have cleared my head of many questions I was concerned with.
Now, I wonder how much a street rodder will give for my MPI?
 
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Old 09-18-2002, 06:07 PM
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DONT!
DONT!
DONT!

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Old 09-18-2002, 07:06 PM
  #14
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Go with an Edelbrock Marine 750 with an electric choke. That combo will give you good performance and fuel mileage. The Edelbrocks are easy to tune. The standard jetting should be very close to what you will need, maybe even a little too rich but, that is a good place to start. My '93 7.4L with a Weber (Edelbrock) 750 runs exellent and gets about 2.5mpg average. Good luck.

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Old 09-18-2002, 07:09 PM
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timucin

Don't, don't don't what?
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Old 09-18-2002, 07:40 PM
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Default Don Man

dont know what your fuel econamy is now but I run a 1995 23 foot wellcraft that is about 4500-5000 pounds loaded I only run it WOT and have it a little over proped for that reson and get over 2 mpg with it and it has the 650 weber (like edlebrock or carter) hope this helps? Charlie
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Old 09-18-2002, 08:49 PM
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I`ve never actually checked my MPG, but comparing gallons burned per running time (hours), this Baja uses about the same amount of fuel as my last boat, a 19' with 350-4 bbl.
I just feel like I have a more efficient hull along with a under-utilized engine (at cruise) than my previous boat.
The carb idea came about after realizing all the tinkering needed to add any power to this fuel injected engine. I believe I would be making a good decision to swap. If I can sell the MPI for a fair price, the swap would practically be free!
 
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Old 09-18-2002, 08:52 PM
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Quote:
Originally posted by timucin
DONT!
DONT!
DONT!

Don`t what? Swap to a carb?
Give me a good arguement why I shouldn`t and I`ll listen.....
 
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Old 09-18-2002, 10:14 PM
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Unless you have closed cooling or only boat in fresh water don't use an aluminum manifold or make sure you have it coated before installing it.
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Old 09-19-2002, 05:40 AM
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Dennis, the power valve circuit in a Holley can be adjusted for timing and amount. The bad part is that the power valves eventually blow even with the check valve in them.
 
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