Hello, I'm new here and live in Australia. I have just built a 347 engine for a buddy of mine with a 66 convertible. Her is a list of components:
5.0 roller block
Trick flow heads
Trick flow roller rockers
trend push rods
probe 347 rotating assembly(5.315 rods 331 pistons) 10.5:1 C/R
performer RPM intake
etc. etc.
My problem is with camshafts. It is running a hydraulic FLAT TAPPET CAM. Originally, we were running an comp cam extreme energy XE 274H (from memory), yet the valve train noise was unbearable. We tried 3 sets of lifters on this cam with no change, one set being crane anti pump ups. We were running a 10w 40 oil. Oil pressure around 50 psi when hot.
Spoke to comp cam tech guy and he said extreme energy are noisey. Went for a milder magnum or high energy cam I think with about .500 lift and 280 adv. duration. Did all the normal things, cam lube, oil additive, pre primed and fired her up with no dramas to run in the cam. We were running a 20w 50 mobil mineral oil. Did two rounds of ten minute runs as it got hot. Still very tappety. Dropped the oil, changed it, went for a drive still ticking. Got back checked the oil and it was black. Drained it and found a lot of metal. The cam had failed!! Pulled motor down and it was destroyed. bores scored, oil pump almost jammed.
By this stage we were sick of spending money on this engine, so we purchased a cheap chinese set of gaskets, cheap dynotec stage 4 cam and lifters and chinese oil pump and rings. Did a quick hone, threw it together and fired her up. No oil additive, 25w 60 oil and no problems at all. no tap at idle apart from what I would say normal noise. Driving the car though we can still hear what we think is a valve train noise coming down through the gears and at around 2K RPM (I think no tach). Thing runs strong, no oil consumption, just this noise.
Could it be the rollers making this noise. Do the pushrods make noise through the guide plates, as there is a slight wear pattern in that area. I am so sick of this car. The other problem is, we are having problems with it overheating. It has a dual pass bigger than standard aluminium radiator with two 10" spal fans and shroud. A cruise cooler pump, yet the crank pulley is a march 5.5" I think. It has a 180 thermostat in it. Yes head gaskets are on correctly. It overheats at freeway speeds as well.
Please help, as I'm pulling my hair out!!!
5.0 roller block
Trick flow heads
Trick flow roller rockers
trend push rods
probe 347 rotating assembly(5.315 rods 331 pistons) 10.5:1 C/R
performer RPM intake
etc. etc.
My problem is with camshafts. It is running a hydraulic FLAT TAPPET CAM. Originally, we were running an comp cam extreme energy XE 274H (from memory), yet the valve train noise was unbearable. We tried 3 sets of lifters on this cam with no change, one set being crane anti pump ups. We were running a 10w 40 oil. Oil pressure around 50 psi when hot.
Spoke to comp cam tech guy and he said extreme energy are noisey. Went for a milder magnum or high energy cam I think with about .500 lift and 280 adv. duration. Did all the normal things, cam lube, oil additive, pre primed and fired her up with no dramas to run in the cam. We were running a 20w 50 mobil mineral oil. Did two rounds of ten minute runs as it got hot. Still very tappety. Dropped the oil, changed it, went for a drive still ticking. Got back checked the oil and it was black. Drained it and found a lot of metal. The cam had failed!! Pulled motor down and it was destroyed. bores scored, oil pump almost jammed.
By this stage we were sick of spending money on this engine, so we purchased a cheap chinese set of gaskets, cheap dynotec stage 4 cam and lifters and chinese oil pump and rings. Did a quick hone, threw it together and fired her up. No oil additive, 25w 60 oil and no problems at all. no tap at idle apart from what I would say normal noise. Driving the car though we can still hear what we think is a valve train noise coming down through the gears and at around 2K RPM (I think no tach). Thing runs strong, no oil consumption, just this noise.
Could it be the rollers making this noise. Do the pushrods make noise through the guide plates, as there is a slight wear pattern in that area. I am so sick of this car. The other problem is, we are having problems with it overheating. It has a dual pass bigger than standard aluminium radiator with two 10" spal fans and shroud. A cruise cooler pump, yet the crank pulley is a march 5.5" I think. It has a 180 thermostat in it. Yes head gaskets are on correctly. It overheats at freeway speeds as well.
Please help, as I'm pulling my hair out!!!