![]() Will there be clearance issues with the stroker crank? Our dyno tests show over 20% increase in torque over a stock engine. The kit includes a Ductile Iron 3” Stroker Crank, corresponding rods for use with stock pistons, and rod bearing inserts for the rods. We have an economical stroker crank setup that works very well for surface-drive mud boats and stock governed pulling engines. If you’re using the 3.220” stroke crank, you would use the 0.750” pin height custom Diamond piston and a stock length rod (4.495”). If you run our stroker crank it will take the 0.750” pin height custom Diamond piston, along with the corresponding rods (see page 28 in our 2019 catalog). If you use a 0.750” pin height custom Diamond piston and a stock crank, it would take the 0.290” longer rod (4.785”). ![]() The Command has a stock rod length of 4.495” that goes with our 1.040” pin height custom Diamond piston. ![]() (It’ll start just below the oil filter mount, across and through the (rear) main bearing area, then up through the lifter bores.) Anything in the 90’s will have a chance to tear the block apart. (These bigger bores will also require stud-ing the block.)īased upon our experience, if your engine is making over 90 ft-lbs of torque - you are running on borrowed time. If you want to go to a 3.385”, a 3.425”, or a 3.445” bore, it is best to use an 18 HP (or one of the older 25 HP Nikasil coated) engine and have it NiCom coated. You can bore out the existing sleeve in the engine or re-sleeve it to the larger bore. With the 18-22 HP engines the largest over-bore you can go is 3.110”, the 23 HP 3.228”, and the 25-30 HP up to 3.327”. (NiCom is the new and improved version of Nikasil, consisting of Nickel and Carbide.) This is the same stuff used on NASCAR engines, outboards, and snowmobiles. Since then we’ve been able to bore them out to the bigger bores and coat them with NiCom. The 18-22 HP engines have a 3.032” (77 mm) bore, the 23 HP a 3.150” (80 mm) bore, and the 25-30 HP has a 3.268” (83 mm) bore.īack around 2002, we coated some 25 HP blocks with Nikasil, which turned out to be hard to work with. The Command lifter spacer is wider than the SBC.Īll commands have the same stroke 2.640” (67 mm), with exception to the 30 HP (Model CH750) which has a stroke of 2.716” (69 mm). The lifters are 0.842” in diameter, which is the same diameter as the Small Block Chevy (SBC). The Command V-Twin is an all metric engine, with exception to the valve lifters. Are the Commands V-twin metric or SAE measurements?
0 Comments
Leave a Reply. |