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SOHC - 2.3L & 2.5L Lima Engines Discussions and Topics specific to the Lima 4 cylinder engines

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  #1  
Old 12-28-2007
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Icon4 getting this thing tuned

ok.. i have an 87 ranger with many many engine mods. its been poked and stroked .060 bore, stroker crank, 5.5" sportsman rods, comp custom grind street cam, with forged pistons, has a ported and polished decked head, makes 11:1 compression, has full msd ignition, racing intake manifold, holley 350 2-barrell, pacesetter longtube header and dynomax muffler

me and my dad cannot get this thing tuned right. we don't know if we have the right springs in the distributor, or if the carburetor is still too big or not. it isn't jetted right and it runs like crap, very rich. we need help with tuning it
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  #2  
Old 12-28-2007
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anyone got any suggestions?
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Old 12-28-2007
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does nobody wanna help the new guy on here out??
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Old 12-29-2007
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So I am going to go out on a limb here , and am guessing that it is a 4 cylinder ?
First things first , is the timing belt installed correctly ?
Then I would check the float level , make sure it is not too high .
Hook up a vacumn gauge , and ensure that you have good , and steady vacumn at an idle .
And check the timing with a light .
If your float level is correct , just barely dribbles out the sight hole with engine running , then check the power valve .
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  #5  
Old 12-29-2007
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Quote:
Originally Posted by ashleyroachclip
So I am going to go out on a limb here , and am guessing that it is a 4 cylinder ?
First things first , is the timing belt installed correctly ?
Then I would check the float level , make sure it is not too high .
Hook up a vacumn gauge , and ensure that you have good , and steady vacumn at an idle .
And check the timing with a light .
If your float level is correct , just barely dribbles out the sight hole with engine running , then check the power valve .
yes its a 4 cylinder, and the timing belt has been corrected. we will check the vaccum and float level, and i will post it when we rule out some more stuff
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  #6  
Old 12-30-2007
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Quote:
Originally Posted by ashleyroachclip
So I am going to go out on a limb here , and am guessing that it is a 4 cylinder ?
First things first , is the timing belt installed correctly ?
Then I would check the float level , make sure it is not too high .
Hook up a vacumn gauge , and ensure that you have good , and steady vacumn at an idle .
And check the timing with a light .
If your float level is correct , just barely dribbles out the sight hole with engine running , then check the power valve .
what is the power valve?
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  #7  
Old 12-30-2007
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A power valve is a device in the bottom of the carb under the float bowl. You have to pull the carb and remove the base from the carb body and the valve is the part with a diaphram in the middle and a nut looking diameter on it. The diaphrams go bad and pass fuel causing it to run rich. It's for giving the engine extra fuel at full throttle. If left over night the float bowl drains and it's hard to start.

Sounds like an interesting ride your building.
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  #8  
Old 12-30-2007
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What are the specs of your cam? The Duration and lobe separation? Do you know what make/model cam you have?
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Old 12-30-2007
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Quote:
Originally Posted by Ranger Carl
A power valve is a device in the bottom of the carb under the float bowl. You have to pull the carb and remove the base from the carb body and the valve is the part with a diaphram in the middle and a nut looking diameter on it. The diaphrams go bad and pass fuel causing it to run rich. It's for giving the engine extra fuel at full throttle. If left over night the float bowl drains and it's hard to start.

Sounds like an interesting ride your building.
the carb is brand new. it had a holley 500cfm 2 barrell and we thought it was too big for it cause it was running rich with the smallest size jets in it. so we have just bought a holley 350 and it is still rich.

it is definitely an interesting project to say the least lol! i will have to post some pics of it. i can tell you that there is not another one like it
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Old 12-30-2007
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Quote:
Originally Posted by D.
What are the specs of your cam? The Duration and lobe separation? Do you know what make/model cam you have?
i'll have to get back to you on the cam specs. i think they are in the build sheet but im not 100% sure. i know it is a comp cam and it is a custom grind by racer walsh who built the engine. he's out of jacksonville, fl.
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  #11  
Old 12-31-2007
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If it has a power valve even a new carb can have a bad power valve. I don't know if Holley's use a power valve but it would be a good idea to find out. Call your builder and see if he knows what could be the problem. You spend as much as you did and he should help you.
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  #12  
Old 01-01-2008
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Quote:
Originally Posted by Ranger Carl
If it has a power valve even a new carb can have a bad power valve. I don't know if Holley's use a power valve but it would be a good idea to find out. Call your builder and see if he knows what could be the problem. You spend as much as you did and he should help you.
i'll still check and see if it does or not. the guy was kind of an *** and took forever to build it and was hard to get in touch with. its been like almost 2 years since he built it.
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  #13  
Old 01-01-2008
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holley's have power valves , and they are behind the float bowl , in the metering block.
If you have a cam with a long duration , and large overlap , you will have to determine which valve you need , by determining your engine vac. at an idle .
Holley's web site can help you dial this in .
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  #14  
Old 01-02-2008
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it's not a very big cam. i'll check out their website. its pulling an 18-20in. vaccum at idle
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  #15  
Old 01-02-2008
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steady needle ?
no fluctuations ?
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  #16  
Old 01-03-2008
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Quote:
Originally Posted by ashleyroachclip
steady needle ?
no fluctuations ?
yep. steady needle
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