I Dyno'd mine today! Spent yesterday getting it on the dyno stand and broken in. Made a couple 4k pulls today checking vitals, then changed the oil. This afternoon we made some 6K pulls.
I should preface this with... My main objective was break in a solid flat tappet and not max power. I'm going to be running a Holley Stealth Terminator EFI and I'm frankensteining the sniper ignition to work with the Terminator. Therefore, I didn't want to have ignition issues on first startup for fear of flattening the cam. So I wasn't tuning for perfect fuel ratio, timing curve or whatever. It's all changing anyway. We set timing at 36* and afr was 11.9-12.2 for the pulls. Also I know there is more on the table but I wasn't concerned with it, honestly. It was nerve wracking enough! Holy crap is it nerve wracking!
Also, my Dyno operator told me not to get too caught up in numbers or expectations. And that they call his Dyno "the humbler". So, some specs.
Short block:
360 based 414
4.06 bore
4.0 Molner forged crank
6.123 Molner rods
Mahle inverted dome pistons 16cc's
.276 top ring down
~ -.002-004 in the hole
10.87-10.89 compression
.040 custom Cometics
Quench .043 not sure on an inverted dome?
1,1,2mm ring pack .016 top .020 2nd gap
King bearings throughout
.002 main clearance
.0028 rod clearance
1784 bobweight
Arp main, rod and head studs
Milodon road race pan and pick up
Modded windage tray(due to stud clearance)
IJ crank scraper
Melling 72HV(used lol)
Mopar magnum one piece oil pan gasket
MP .557 cam 4* advanced at 106*
Rollmaster billet chain
MP chain tensioner
Flowkooler water pump
Side entrance rear freeze plug cooling
Trick flow balancer internal
Top end:
Howard's EDM solid lifters
Milodon valley tray
Smith Bros custom 5/16 ball/cup pushrods
Erson 1.6 roller rockers
B3re geometry correction
Billet rocker hold downs and studs
Lashed to .020/.024 hot
HD distributor gear/pump drive
A crap ton of driven assembly lube
Trick flow 190 heads
Mopar M1 modded intake (burr finish(done by me and probably a hindrance ,I'm not a pro), epoxied to square bore, back passage coolant lines.
Hvh super sucker (left on for every pull)
Autolite 3924's
A friend's msd distributor and wires
A friend's Holley 750 set up for his 408.
Mix of 91 and 112 unleaded. So 95 octane?
Results:
Dyno's onsite weather station
5200 foot elevation
90* today
25.7 in
42.3 relative
546hp/557tq corrected
Edited to reduce some of my confusion. Thanks
Lmk if I missed something.
Thanks,
Keith
View attachment 1715358101