directdrive
New member
O.K. I have a 69730 Predator and a $500 budget. How would you build it for all out horsepower?
have you taken the motor apart yet? check your piston deck height before you go ordering a .020 rod. check piston to head clearance and valve clearance before you go milling it all away. just sayinThis is what I have come up with.
Arc .020 rod
Arc billet flywheel
mill head .080 thin head gasket mild porting job
stock stainless valves with alum. retainers and split keepers
26 lb valve springs
black mamba cam
S/A or Holy Moses carb.
header, filter ,top plate, pump etc.
Try too measure ur 'in-the-hole' b4 you order the rod. If you want 2b .020 'In', you might be better off w/ a 'std' or a (+).010. and try too stay w/ a single (.010) gasket. Leave urself some 'room' 4-rebuilds. Good LuckYeah. I need to be about .020 in the hole. I can turn down piston also. Thanks.
All added up with header,filter,gaskets, muffler, fuel pump $526. Machining extra. Not too bad.
This Poboy knows how to save money and make power.Yeah the 60363 would have given ya a flat top piston to start with and a canted valve head with 27/25mm valves. The flat top weisco 2.756 would add another 100 or a little less.
Morning; Sneaks may I ask what do you mean by larger crank bearings,Did i miss something????Many think that the old style has more stroke but I don't think they do. After measuring the stroke on both I found the old style 730 piston sits lower in the bore than the 363 at bottom dead center but doesn't come up as far by the same amount. The 730 sits .040" "in the hole" while the Hemi is only .010". I believe the larger crank bearings and location of the 730 has moved the stroke in the bore but its not any bigger...JMO
If that's the case, then the pin placement in the piston has too be different....what do the pistons read from the ctr of the pin to the top of the piston? (curious)Many think that the old style has more stroke but I don't think they do. After measuring the stroke on both I found the old style 730 piston sits lower in the bore than the 363 at bottom dead center but doesn't come up as far by the same amount. The 730 sits .040" "in the hole" while the Hemi is only .010". I believe the larger crank bearings and location of the 730 has moved the stroke in the bore but its not any bigger...JMO