66 Dart GT HT Whatsitgonnabe?
Alright, I've been reading this (sometimes agitated) thread on SB oiling mods. In it, a user no longer present on the site, yellow rose, argues that the oil timing for the rods is off because the main feed hole is drilled at 12 o'clock, right at the top of the saddle, while the drillings in the crank are at about 45 degrees. This results in the best oil flow when the piston is 45* after TDC when it should be at 70* after TDC.
Yellow rose argues that GM got it right when they drilled the mains oil feed holes like this (see right hand saddle in the pic):
Yellow rose suggests a fix for this that involves drilling new oil feed holes on the bottom of the main caps and cross drilling the crank.
I have a different idea. I'm thinking I could drill down to the mains feed canal just like in the SBC block and drill a new hole in the top half of the bearing that meets up with that new hole. Since he is no longer on the site, I can't ask him what he thinks about it. @B3RE is involved in the discussion in that thread too, maybe he will grace me with his prescence if I tag him?
Does anyone else have any thoughts?
I think maybe I should slot the bearing or groove the saddle to allow oil flow to the cam bearing canal, but then again, the new bore will meet up with the exising one so supply to the cam wouldn't be compromised.
If I keep the exisiting hole in the bearing, the rods will be fed twice which can't be bad, right?
Now, I know this isn't necessary unless you plan on spinning over 7500 but I aim for 7000 and wouldn't mind going higher.
Thoughts?
Alright, I've been reading this (sometimes agitated) thread on SB oiling mods. In it, a user no longer present on the site, yellow rose, argues that the oil timing for the rods is off because the main feed hole is drilled at 12 o'clock, right at the top of the saddle, while the drillings in the crank are at about 45 degrees. This results in the best oil flow when the piston is 45* after TDC when it should be at 70* after TDC.
Yellow rose argues that GM got it right when they drilled the mains oil feed holes like this (see right hand saddle in the pic):
Yellow rose suggests a fix for this that involves drilling new oil feed holes on the bottom of the main caps and cross drilling the crank.
I have a different idea. I'm thinking I could drill down to the mains feed canal just like in the SBC block and drill a new hole in the top half of the bearing that meets up with that new hole. Since he is no longer on the site, I can't ask him what he thinks about it. @B3RE is involved in the discussion in that thread too, maybe he will grace me with his prescence if I tag him?
Does anyone else have any thoughts?
I think maybe I should slot the bearing or groove the saddle to allow oil flow to the cam bearing canal, but then again, the new bore will meet up with the exising one so supply to the cam wouldn't be compromised.
If I keep the exisiting hole in the bearing, the rods will be fed twice which can't be bad, right?
Now, I know this isn't necessary unless you plan on spinning over 7500 but I aim for 7000 and wouldn't mind going higher.
Thoughts?
