Starting a 512 build

[Hemirunner]

Had to take this block to .060 over. Some rust pitting wouldn't clean up at .040, so going to .060. Ring sets seem to be limited at 4.400, so will keep looking. I Would like to use the low tension oil ring, with a Moly top ring, file fit.

Running a vacuum pump? If not, stay with a standard tension oil ring.

 

[Garys1969RR]

Well it's finally ready for assembly! Block has been bored to .060 over, cleaned, decked, new cam bearings, freeze plugs, and honed with torque plates. So picking it up tomorrow, and will start painting, cyl bore cleaning, and assembly. I'll post some pics as we go along.

 

[Challenger340]

Well it's finally ready for assembly! Block has been bored to .060 over, cleaned, decked, new cam bearings, freeze plugs, and honed with torque plates. So picking it up tomorrow, and will start painting, cyl bore cleaning, and assembly. I'll post some pics as we go along.

Line Honed & Adjusted to "set" Vertical Main Bearing Clrc ?
Rod BE's Checked/Adjusted to "set" Vertical Rod Bearing Clrc ?
and,
if using a 440Source Kit(others as well), be sure and check & adjust the Pin-Fit in BOTH the Rod small ends AND the ICON Forged Pistons.

Not trying to rain on your day, I'm sure it's at an exciting point in the process for you ?
Just a few common areas that sometimes get overlooked and can be problematic to good outcomes later.

 

[Garys1969RR]

All clearances checked out great! Here's a few pics of the crank installed. Rear side seals were difficult to get in there. We used max oil resistant silicone on the outside of the rear seal mount. Never had a seal leak doing it like this.

 

[miller]

Looks good!

 

[Challenger340]

No Main Studs ?
How much power are you targeting ?

 

[Garys1969RR]

Not sure what it will make. The 496 was pulling the 2800 lb car low 11s at 118. Any idea what the power would be? Wallace Calculator should give an idea of what that motor was making. No main studs on that one either. Pistons are .015 above deck. Need to re think head gaskets now, .039 may not be enough. Only gives .024 piston to head clearance.

 

[not so famous bob]

View attachment 749839 View attachment 749840 Not sure what it will make. The 496 was pulling the 2800 lb car low 11s at 118. Any idea what the power would be? Wallace Calculator should give an idea of what that motor was making. No main studs on that one either. Pistons are .015 above deck. Need to re think head gaskets now, .039 may not be enough. Only gives .024 piston to head clearance.

You can special order head gaskets from cometic , I`m told.

 

[BSB67]

View attachment 749839 View attachment 749840 Not sure what it will make. The 496 was pulling the 2800 lb car low 11s at 118. Any idea what the power would be? Wallace Calculator should give an idea of what that motor was making. No main studs on that one either.

< 375 hp, uncorrected flywheel

 

[Garys1969RR]

< 375 hp, uncorrected flywheel

Sounds about right. Guys say they are shooting for 600 horse. So if they get there, then they should be running in the 9s at about 135 MPH, right? Not hard at sea level, but try that at 5400 feet!

 

[Garys1969RR]

Found some Cometic head gaskets with a thickness of .051". That puts piston to head at .036" quench clearance. I can live with that ( and so can the motor) LOL. Will use the C 5464-051 gasket. Pricey at $88 each, but the alternative is piston clearance at .024" from the head at TDC, which is too close for my comfort. I may try .025 on a motor built from leftover parts, just to see what happens.

 

[Garys1969RR]

< 375 hp, uncorrected flywheel

Well that's about what a 1968 stock 440 would be making at sea level. No need for even main studs, with the power at 375. Still have a ways to go before I'll need them, it Looks like.

 

[Garys1969RR]

Ok, so got all the rings fitted, pistons in, bolts torqued, painted, oil pan on. Here's a few pics. I like the 72 Chrysler blue engine paint.

 

[Garys1969RR]

Oh yea, its taking 28 lbs of torque to turn the motor over, without valve train installed. That's good! Used 17 lb tension oil rings. 440 Source seems to think those are adequate to keep oil consumption under control. Set top ring end gap at .020, 2nd one at .025. Some builders say this greatly reduces ring flutter and blow by on big bore engines, above 3500 RPM.

 

[Garys1969RR]

Got the heads and oil pump on today. Put in a spark plug, turned it over, and it kept turning back, like a spring would. Rings are sealing really well! Compression was taking about 10 -15 seconds to go past the rings when rotated to TDC........Now we're setting the rocker side play, and getting them centered on the valve stem.

 

[Hemirunner]

Looks great!! Are you you putting it on the dyno or is it going straight into the car?

 

[Garys1969RR]

It will be going into the car in a week or 2. The 496 it came with was running the 2800 lb car thru the 1/4 mile in 11.2 seconds, at 118. Someone said that ewuals 385 horsepower. We'll see how this one does.

 

[Garys1969RR]

Finally got it in, and it's running great! Drove it down the street today, and it's very responsive, with great torque! Taking it to the track tomorrow for some testing.

 

[Garys1969RR]

Finally got some runs in last night. First one was 11.05@118. Then advanced timing from 32 to 36, and it ran 10.93@119. 3300 lb car, not sure what the horsepower is, but it's running really strong! Sounds great! Real happy with it so far.

 

[Garys1969RR]

Wallace calculator shows a 3300 lb car going 10.9 in the 1/4 mile, is making 502 horse at the flywheel. Sounds about right. I'm sure the hi stall T Converter is eating up some of the power.