Yep, the "pill" goes toward the motor.
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I. Like using straight manifold vacume the ports on the carburetor that are intended for timing limit the vacume at idle so being more retarded burns more fuel and is a little better for pollution but a retarded idle makes engine run hotter. If you don't have an adjustable vacuum advance pull cap off and make a stop so to limit advance to 40 degrees at idle or cruising
There is a good thread on this but I am on the road try searching vacuum advance.
It explains it better than I can.
Not aware of any decent reverse flow waterpumps for 348-409-----------did you just change the impeller????? If so, that won't work as the impellar must not only fit the housing but inlet and exits must be arranged compatible to the impeller flow direction.
How many amps does your electric fan pull???????
See Post #2 in your earlier thread - http://www.clubhotrod.com/shop-talk/...tml#post544035
I am going to check the timing and carb more and then check the flow of the pump. I'm not going to go through to much more work with buying $400 dollar pumps or changing everything to a v belt setup if the pump isn't flowing good enough. I have a reversed impeller in it right now, I was in to this thing so deep that was about my only option at the time. Tonight I drove it when it was about 75-80 deg and the temp never broke 200, I might just limp it along this summer and drop a 5.3 in for a winter project. I wish I could go back in time and talk to the young man who thought this whole 348 setup was too cool to pass up :LOL:
It’s a little difficult to see from your pictures, but it doesn't look like you're using a bypass hose with your current setup. I know there are folks that say the bypass hose isn’t necessary, but I can tell you from personal experience overheating problems can occur without the little rascal installed.
Hopefully your issue may be simpler to fix than you think … it may be worth a try.
http://i1380.photobucket.com/albums/...g?t=1496790696
4 C notes is a lot for a water pump, but it's a lot less than a new motor.
Do you have visible flow in the radiator with the engine hot? Beyond a gross timing issue, I think it's the culprit, having read the thread.
The previously mentioned oil cooler is cheap, and you can relocate the oil filter at the same time.
You've come so far, it seems a shame to give up now.
WOW! Nice catch Dan J.
Yes, that was a good catch!
No need to be embarrassed, we all missed this except Dan J! Stuff happens, fortunately with enough people looking at problems from different view points we sometimes find the overlooked. From my research on this, the bypass was added by Chevrolet to correct the overheating, it lessons the cavitation at the impeller and increases system pressure.
This may well fix it.