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08-06-2009 08:39 PM #1
Got the '35 back on the road, but I got problems...
Well, This might be long, sorry. I finally got my sportsman II heads out of the machine shop, stuck 'em on my .020 over 350 with some .015 shim gaskets and took her down the road. Power is much better than my old 186 camel humps and the car has never ran so good. Before I was running 9.7:1 compression with .068 quench and it was detionation city....now with the Sportsman II's and the shim gaskets I'm running 9:1 with .043 quench. everything is perfect with one exception..........It all started long before the head swap, when I wrapped my headers and installed an Edelbrock water pump back last summer. My car always ran cool unless I idled around in traffic a long time, but even then it never boiled the water I figured I'd wrap the headers to reduce the under hood temps and increase water flow a tad and wrap up this slight cooling problem...a few minutes after I fired it up the temp gauge pegged at 250 but the engine wasn't hot. I drove it a good bit and even during the winter it never came off 250 when it warmed up even though the cooling fan cycled on and off like normal. I blamed the problem on the fact that the sending unit was in the rear of the passenger head and the headers were holding more heat in the heads after I wrapped them. I decide to move it to the intake but I had to wait till the head swap so I could drill the intake while it was off. Well, I swapped the heads, drilled the intake, installed a new sending unit in the intake, and I've still got problems. The sending unit for the fan is in the intake on the driver's side and the unit for the gauge is on the passenger side. I just drove it 15 miles with a 160 degree thermostat and it never reached 200 degrees until I stopped. When it idles it moves up quick and the fan takes longer than usual to kick on. I checked the temp of the heads with a laser temp gun and right after I switched it off the temp of the heads right next to the spark plugs was in the 190's on the driver's side and nearly 230 on the passenger side with the passenger rear being the hottest. I guess this is why there is such a difference between the temp at the gauge and the temp the fan kicks on, the engine isn't running the same temp on both sides. Now I don't know if there is an issue with the water pump or on of the shim head gaskets leaking. I ran the car pretty hard up to around 6000 rpm I couln't beg it to hit 200degrees and it's not pushing out the water, though it is boiling, bubbling, gurgling or something after I switch it off, but not boiling over. I've rechecked the part number on the pump and it is correct and it seems to me if it were a head gasket those wide open blasts to 6000 out on the highway would cause an increas in temperature and puke out all the water. I'm thinking about putting the stock pump back on to see if it helps before I yank the heads again, what do ya'll think? I'm trying to get it ready for the show at Pigeon Forge next month but I've got to get this fixed befor I can make the 1000 mile round trip...thanks guys.
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance