The COMP Cams belt drive will be reused due to its durability and the quick cam changes it
The new, taller slugs put DM's pistons right at "zero" deck, which is what we like to see for the best possible power. In addition, they also raised DM's compression by a little more than a half point. Other than the new slugs, DM was put back together just like it was the first time. The file-fit Speed-Pro rings were gapped a little wider than standard to accept some extra abuse and a pair of steel O-ring Fel-Pro heads gaskets (PN 1003) were clamped on top.
For its next bash on the dyno, we will retest the Holley Street Avenger TBI fuel injection system that we had tried before. To make DM more TBI friendly, Speed-O installed a smaller Lunati hydraulic cam and some World Products Sportsman II iron heads. Then they topped it off with a Holley Street Avenger dual plane intake manifold to give the TBI the strongest signal possible. We asked Speed-O to reuse the COMP Cams 1.5:1 magnum roller rockers button up the ignition with a new computer-controlled electronic distributor from Holley.
To give the Motown block more bite on its new set of Speed-Pro rings, Speed-O-Motive brush
We figured even though this equipment might not break any records in the horsepower deparment, it would definitely complement the low-speed torque characteristics of the street-worthy TBI. Who knows, we might break a new low-end torque record with this set up. You'll just have to wait until next month to find out. Because that's when we'll head back to Vrbancic's dyno once again to see if we can make the TBI fly.
Danger Mouse Rebuild Specifics For Part 16Compression: 9.1:1World Products: Motown block 4.030 boreWorld Products: Sportsman II iron heads 64ccLunati: hydraulic flat-tappet cam PN50179LUN (268-279 degrees advertised duration, 215-224 degrees duration at .050, .489/.489 lift, 112-degree lobe separation, 108-degree intake centerline)Lunati: crank, rods, and flattop pistonsHolley: dual-plane manifold PN300-36 Speed-Pro: rings and bearingsFel-Pro: gasketsMilodon: oil system and fastenersSpeed-O-Motive: assembly
The new Lunati slugs have a slightly higher (0.040-inch) pin height, putting them at a tru
Speed-O-Motive file-fit the new Speed-Pro moly rings on their powered ring grinder to give
A new Lunati hydraulic flat-tappet camshaft was chosen for this build because it will work
Before laying the Lunati crank in the block, Mitch applies his mix of assembly lube to eac
We're reusing the same Lunati crank that we ran all season last year. It's a very stout pi
Fel-Pro supplied all the new gaskets we're using for this build. This is the new one-piece
2250 Agate Ct.
26555 Northwestern Hwy.
Speed-Pro Sealed Power Corporation
100 Terrace Plaza
Holley Performance Products
1801 Russellville Rd.
Bowling Green, KY 42101
131 W. Lang Ave.
Bill Mitchell Hardcore Racing Products
51 Trade Zone Ct
Source for World Products