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-   -   Holley Carb Woes - DCDoug Pay Attention (Long Post) (http://www.clubcobra.com/forums/fe-talk/104877-holley-carb-woes-dcdoug-pay-attention-long-post.html)

Ron61 06-06-2010 06:41 AM
Ed,

I have filters on everything now but the weed eater and it is going to be hard to find one that I can fit into that tiny space and short fuel line. I am looking for some of that gray fuel line that is supposed to stand up better to the ethanol.

Ron

aspenbubba 06-06-2010 09:26 AM
Hey Patrick,

How are you ? Are you coming to the Pig Roast next week?

I could ask Doug what gasoline you use but I wanted to go to the source. I have a 351 -W with a Holley in a non-ERA and one of my fellow drivers warned me about the ethanol problem. He has the same set-up.

patrickt 06-06-2010 01:40 PM
Quote:
Originally Posted by aspenbubba (Post 1056168)
Are you coming to the Pig Roast next week?

I could ask Doug what gasoline you use but I wanted to go to the source. I have a 351 -W with a Holley in a non-ERA and one of my fellow drivers warned me about the ethanol problem. He has the same set-up.
A Pig Roast sounds like fun. Is that over at Scott's house? I'll log in on the local and see the thread. The gas I use is always 93 Octane, and generally Exxon, Shell, Sunoco, etc. But they always say they have ethanol in them. I don't think you can find non-RFG (reformulated gasoline) in the DC/NoVA area. The Holley 4160 is really dirt-sensitive. In fact, unless something like a Power Valve fails (and they don't really blow out much anymore), or an accelerator pump fails, there's not that much to do with them other than keep them clean. Once you get them set up right, they'll stay that way pretty much forever... until a spec of dirt gets in. If I'm at the pig roast I'll show you the air bleed cleaning. You have to be careful on a hot car though. I zip-tied my throttle wide open so I could peek down it with a flashlight when I squirted the cleaner down the air bleed. That way you can actually see it coming out down at the idle hole. Then I closed off the idle mixture screws and did it again so the pressure blows out the little air holes down the tube. Then just set the idle mixture and idle and *presto* the engine's good as new.;) BTW, the idle circuit is not just for idling -- it affects your low-speed drivability quite a bit.

elmariachi 06-07-2010 09:42 AM
Just to be sure, I tore this 3255-1 LeMans that I have been struggling with apart yesterday and checked every single orifice: Nothing extraordinary. However, I have noticed something peculiar though from running this carb.....several of my spark plugs are showing a single, focused dark spot about the size of a pencil eraser on the side of the insulator near the tip. Imagine spotting it with a Sharpie right below where the isolator touches the electrode tip. All the plug reading charts I can find call this "splash deposits" related to a gunked up carb or fuel additives. I am running Redline lead substitute but haven't seen this in 3500 miles with the Mighty Demon. Anyone seen something like this?

Rick Parker 06-07-2010 11:21 AM
Are you running the addative in the same concentration?

elmariachi 06-07-2010 11:51 AM
Quote:
Originally Posted by Rick Parker (Post 1056338)
Are you running the addative in the same concentration?
Running it per the bottle's recommendation. maybe a little heavy. Redline says its not being caused by their product. NGK says its a cold spot on the plug caused by being near the intake.

Excaliber 06-07-2010 01:19 PM
Pat, what kind of lining is inside the metal wrapped tubing on your fuel system? I would think it would be rubber as well?

Perhaps the ultimate solution is to use fuel injection hose, expensive stuff, but I would think that would eliminate any possibility of hose break down from alcohol? Not that I'm worried about that myself, I've got rubber fuel lines, been running alchy mix gas for years, never had a problem to date...

patrickt 06-07-2010 01:23 PM
Quote:
Originally Posted by Excaliber (Post 1056365)
Pat, what kind of lining is inside the metal wrapped tubing on your fuel system? I would think it would be rubber as well?
It's that Russell/Edelbrock crap. I don't like the Red/Blue on it anyway, so that's a good excuse to just change it all out anyway.

RodKnock 06-07-2010 02:23 PM
Quote:
Originally Posted by patrickt (Post 1056367)
It's that Russell/Edelbrock crap. I don't like the Red/Blue on it anyway, so that's a good excuse to just change it all out anyway.
Agree 100%.

dcdoug 06-07-2010 02:30 PM
Quote:
Originally Posted by elmariachi (Post 1056331)
Just to be sure, I tore this 3255-1 LeMans that I have been struggling with apart yesterday and checked every single orifice: Nothing extraordinary. However, I have noticed something peculiar though from running this carb.....several of my spark plugs are showing a single, focused dark spot about the size of a pencil eraser on the side of the insulator near the tip. Imagine spotting it with a Sharpie right below where the isolator touches the electrode tip. All the plug reading charts I can find call this "splash deposits" related to a gunked up carb or fuel additives. I am running Redline lead substitute but haven't seen this in 3500 miles with the Mighty Demon. Anyone seen something like this?
Why are you running lead substitute? Don't you have hardened valve seats?

elmariachi 06-07-2010 02:50 PM
Quote:
Originally Posted by dcdoug (Post 1056377)
Why are you running lead substitute? Don't you have hardened valve seats?
Nope. Go here and start with post #20. My builder overwhelmingly concurred.

Excaliber 06-07-2010 03:08 PM
Non hardened valve seats with unleaded gas is for the most part is over hyped, in my opinion. The potential for trouble is in extended miles at highway speed, over heating the seats in due time.

Other than that, I wouldn't worry about it, unless your planning a 500 mile trip in one shot at speed.

elmariachi 06-07-2010 03:34 PM
Quote:
Originally Posted by Excaliber (Post 1056386)
Other than that, I wouldn't worry about it
Of all the crap that worries me, that ain't on the list.

dcdoug 06-07-2010 03:54 PM
Quote:
Originally Posted by elmariachi (Post 1056393)
Of all the crap that worries me, that ain't on the list.
You gave me something new to worry about (only a little, but still). When I spoke with my builder, I confirmed that it wasn't a problem to run 93 octane unleaded. I assumed that also meant that he put in hardened seats, but I don't remember actually confirming that specifically. I too had NOS MR heads that had never even had valves in them. Now I wonder whether he just shared the opinion of Ernie that concern about unleaded gas on unhardened seats is overrated or whether I have hardened seats.

This may be a dumb rookie question (feel free to give me some sh!t, but I'm still learning), but is there any way to tell without pulling a head? Can I tell from the valves that I have?

EDIT: Oh, the most important part, my builder passed away in January, so I can't call him. :(

CobraEd 06-07-2010 04:31 PM
get a borascope and put it in the spark plug hole.


.

patrickt 06-07-2010 04:32 PM
Quote:
Originally Posted by CobraEd (Post 1056412)
get a borascope and put it in the spark plug hole.
Hmmm, I didn't realize ElM. and DCDoug were that close....%/

aspenbubba 06-07-2010 04:35 PM
Patrick,

I'll see you there sat (rain or shine) and I'll be cooking the sausage.

Excaliber 06-07-2010 06:02 PM
I'm not sure what you would see or be looking for if you did use bora, or pull the heads for that matter. Gonna be hard to tell...

...not to worry, no problem. :)

patrickt 06-07-2010 07:38 PM
Now that I think about it I should probably pull those little Moraine filters out of the inlets and see if there are little black chunks of rubber in them.%/

dcdoug 06-07-2010 08:04 PM
Let us know what you find.


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