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Made another change to the micro block. Added a ANTIGRAVITY ATX-20 lithium battery. Rated at 680 cranking amps and weighs about 3.8 pounds. It cranks as strong as the 1000 MCA battery that I took out and it weighed 47 pounds. Also listened to the radio in the boat for 4.5 hours and the state...
You might try snugging them all up first. If the lock nuts were re-used they tend to loosen up. You could even loosen the nuts put a dap of silicon and re-tighten.
The return line from the radiator actually connects to the thermostat housing. The pump has to suck the water past the thermostat. There is a bypass coolant line from the coolant exit at the back of the head to keep from starving the water pump and allow re-circulation on warm up. Works...
Plugs fail too. Drop a new set of plugs in if you haven't already. If you are interested in trying to get another not locked ECU to fit your harness I can send you a contact number for a great harness builder in California. He has a bunch of stand alone base tunes for different ECU'S that he...
You been busy old man. All I have to offer is buy a vacuum coolant fill kit. Best money I ever spent. Never leaves a trapped air pocket. My radiator is low so I installed a valve on the radiator drain that I use to suck the coolant into the system from the lowest point. Perfection.
Contrary to most my motor over cools when under load. Motor try’s to stay about 220. Cruising at 3500 rpm it will stay about 210. On dry ground at 4000 or more rpm’s the temp keeps dropping. It will get to 180 degrees in August running sticky green. I had hoped the screen would help that but I...
Boat has been doing great. Built a forged big turbo LTG over the last year. I think I’m going to drop it in the old dragon fly for real testing and breakin. I already ran it for a few minutes on the engine stand under load and everything looks good. This motor should be a beast.