New 512 build planning

[rickseeman]

This is an interesting 2 minute video from Melling showing the oil flow through various main bearing clearances. You can't believe how tight the 1970 FSM says to run the main and rod clearance on a 440. And the Mopar B/RB manual says max allowable before overhaul just happens to be the minimum people say for a new stroker build.

 

[Spyder]

In that video, which number/flow would be preferred? Is 4 flowing enough that you're going to lose pressure and cause problems?

 

[rickseeman]

Yes .004" will cause you to lose oil pressure because of your lack of volume. Use your old HV pump. A new stock 440 is really tight like .0015". But you don't have a new stock 440. Everybody that builds a stroker wants .0025" to .0035". This means there is going to be a lot more oil flowing through your engine. 440 Source sells a Hemi pan and a 3/8" pickup. I won't even start a conversation about going to a 1/2" Hemi pickup. Everybody fights me on that. Do you realize you are going to have nearly as much horsepower as a 1970 426 Hemi Pro Stocker? Every single one of those guys used a dual line Milodon oil system and a 10 qt pan.

 

[Spyder]

All the parts are here and the block is home from the machine shop! I'm off work tomorrow and Saturday and, in between some other good weather home projects I've got to get done I'll be working on this. Pulled the 440 out of the car last weekend and started sanding the engine bay, as I want to paint it body color instead of black before putting the new one in. I had originally wanted to get this thing back on the road by the end of the month but unless everything goes really perfectly I don't think it'll happen.

I'll probably drop in here for a lot of questions in the next few weeks, already been doing tons of reading and youtube watching since this is the first one I've built from the ground up other than lawnmower engines.

 

[Xcudame]

Definitely need to 6 quart oil pan! And remember with the filter, that's 7 quarts! The stock oil pan (402) is really what you'd call a 4 quart pan so you can see the comparison! The main thing with oil pressure is you have at least 10 psi at idle and it goes up at least about 10 psi for every 1000 rpm. The good thing is the 512 engine will have so much torque, you won't want to go over 4500 rpm on the street!!