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Dave Neptune
Dave Neptune
Afourian MVP, Professor Emeritus
Last Activity: Today, 05:57 PM
Joined: 01-20-2007
Location: Grove, Oklahoma
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  • That is the very reason I installed my injection point well before the exhaust went under the floor. The wrap helps a bit but the heat will still accumulate. Even insulating the floor the heat will still go around the insulation and up into the cabinets or the cabin. Shortening the hot section is really...
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  • Dave Neptune
    replied to Engine will only idle
    You stated that cleaning the flame arrestor made a difference. For it to get gunked up the gunk had to come through the carb via poor timing or a bad mix of fuel and air. The idle circuits are very small and can easily be gunked up from the same gunk that plugged up the flame arrestor. I would consider...
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  • Common Shawn it's only 12 more cylinders. As far as parts for the ignition system go to the aftermarket like Summit Racing or even Amazon. The Mallory parts shouldn't be to hard to find and there are other brands that work well too. Getting two sets of springs, one for each distributors C-adv should...
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  • Dave Neptune
    replied to Indigo Electronic Ignition
    Brett, first I do prefer the Indigo EI and I have worked with the Pertronix too. Both are very good systems. Since you already have a working Pertronix why change and if you wish to replace it why not use the same system?
    Unfortunately owning an A-4 "is a learning" experience as it is...
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  • Dave Neptune
    replied to Engine Temp seems low
    No it won't hurt. I ran at 135 for 34 years and no problems.

    Dave Neptune
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    Unapproved
    Powerful Rabbit Stick Stimulator
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  • No you have the trailing edges marked in green. Good to see the Indigo prop, I loved mine on my E35Mk II, it worked great. You will get more RPM's and HP out of it.

    Dave Neptune
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  • Dave Neptune
    replied to WOT underway vs tied up
    You will be much happier and so will the engine getting a closer to correct prop. The A-4 with the direct drive will only ever get to about 20 HP due to the restricted RPM's of the direct drive. An 11 X 8 should get you to about 18~1900 as I recall or maybe a bit more. I did use the Indigo which is...
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  • Dave Neptune
    replied to Water under engine (Atomic 4)
    It depends on where the water is coming from. Is there a "catch pan/tray" under the engine to keep oil out of the bilge? If so there are many places for water to leak so it would be just a matter of locating the leak and fixing it. If you are speaking of the bilge there are many places that...
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  • If it were the stuffing box it should feel hot to the touch and you would hear it in the engine compartment. My bet would be the strut bearing. The Indigo runs at a bit higher RPM's so if the strut bearing was starting to go bad the higher RPM's would exaggerate it. The strut noise would go thru the...
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  • Dave Neptune
    replied to Thermostat
    If your engine is "stock" only two choices.

    #1 The MMI new t-stat from our host as it is the only fit today for the stock set up. It was developed by MMI when the Holley stopped production. It is a double acting style and "standard" style will not work in the stock configuration.
    ...
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  • If you have been keeping new batteries charged via a battery charger the batteries should be fine. Since you are loosing RPM's when switching either the alt is kicking in strongly or you have a GROUND problem. In a 12v system when having issues the ground side is most often the culprit. You should have...
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  • Dave Neptune
    replied to Seafoam
    Probably not BUT it is never a good idea to use more than one additive at a time. Some additives that work well can form "goo" as the bases of the chemical additives may not compatible. I have seen more than a few tanks that operators used 3~4 and even more additives and they created some...
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  • Dave Neptune
    replied to regular ole' alternator
    As long as the pulleys are aligned the only real problem is tension. I have not used the MMI tensioner but I would assume it is for the stock alt. Perhaps there is an option for a stronger spring. N Dutton developed it perhaps he will chime in. Worth checking out I would think. There are just to many...
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  • Dave Neptune
    replied to No spark
    A pic of what you are calling the solid tubing would be nice. The valve I assume is on a line from the side of the block below the alternator and goes to the t-stat housing. In this line many install a valve to control temps when the t-stat is removed IE the bypass valve. On the old style engines there...
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  • Dave Neptune
    replied to No spark
    That is way to much voltage for the entire system and especially the coil. It is advisable to use a resistor with normal voltage on the coil to keep it at around 12v. And yes the alternator no matter the brand or amperage should put out the same charging voltage. The voltage will vary slightly depending...
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  • Dave Neptune
    replied to regular ole' alternator
    At 45 amps that means the alt is only drawing a little over 1 Hp. That should not be an issue for the belt. Are you using a high quality belt? A notched belt is also very good as it will develop less heat when under load.
    Also are the pulleys aligned, smooth and free of nicks and pits? What are...
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  • Dave Neptune
    replied to Leaky carb gasket.
    Ben, sorry did not notice this updated question. Numbers 2 & 3 are plugs. #2 is for fuel in and optional as to installation requirements. #3 is the "main jet" plug, it can be accessed for jet changes or cleaning.

    #1 is the idle AIR screw, it adds air to lean the idle when
    ...
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  • Dave Neptune
    replied to regular ole' alternator
    Yes the stock alt is a 35 amp Motorola. The issues you describe don't sound like the alt as many use larger ones with no issues. The problem could be many easy to fix things. The belt may just be to loose or not aligned well. It could also be the regulator is faulty or set to high putting a big strain...
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  • Greg, it is common for the top of the t-stat housing to read or feel cool as the "bypass" water is injected into the pop of it. RE the sender reading it is probably just a loose wire.

    To really get an idea of the core operating temp of the engine turn the key back on to get a...
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