JESEL SHAFT ROCKER SYSTEM Our rocker system is Jesel’s shaft roller setup, P/N KPS 24347, featuring a very healthy 1.85:1 rocker arm ratio. The first order of business is to install the rocker stands. Each head requires one long stand, positioned across the upper, inboard area of the rocker galley, in addition to four individual [...]
LIFTERS Cyl. No. Lifter cup orientation (per lifter pair) 1-close together 2-far apart 3-far apart 4-close together 5-close together 6-far apart 7-far apart 8-close together Our mechanical roller lifters are Crane’s offset Ultra Pro R/T lifters, P/N 13571-16. With the lifters soaked with 30W oil, these were slid into the lifter bores. Because of the [...]
Our Dart Big Chief II cylinder heads came equipped with Dart 1.625T 330 lb. @2.100″/0.910″ max Comp 948 triple valve springs, but since our Crane custom billet cam specifically calls for their 928 lb. springs, we performed a spring swap. Our Victory titanium intake valves measured 2.470″, while the exhaust valves measured 1.800″. Our Crane [...]
Project 632, Part 4 Short block completion and test-fitting the valvetrain. by Mike Mavrigian all photos by author Moroso’s billet gerotor oil pump kit includes the pump, drive shaft, mounting stud, 12-point nut and washer. In this project installment, I fitted and final-installed the oil pump, oil pan and fuel pump, and I temporarily installed [...]
PROJECT 632, PART 3 SHORTBLOCK ASSEMBLY Our shafts rotate and the slugs run up ‘n down. Life is good. by Mike Mavrigian photos by author Clevite coated main and rod bearings were used for pre-fitting and final assembly. Building a stroker bad boy isn’t a walk in the park, as anyone who has been down [...]
PROJECT 632, PART 2 We hone the block and determine bottom-end clearances. by Mike Mavrigian photos by author With our new pistons in hand, it was now time to hone the cylinders to size. As you may recall from our previous article, our target is to build an all-motor 632 cubic-inch big block featuring 15:1 [...]
Dart 11-Degree Big Chief Cylinder Head Specs P/N………………………18500000 Material…………………355T6 aluminum alloy Comb. Chambers……….56cc (70cc also available) Intake valve dia…………2.470″ Intake port dim. …………1.815″ x 2.725″ w/3/4″ radius Intake port volume………FP CNC – 497cc Intake port location……..Raised 1.500″ spread ports Exhaust valve dia………1.800″ Exhaust port volume……185cc Exhaust port dim………..2.020″w x 1.780″h Exhaust port location……angled & raised [...]
We build a big, big block drag mill just for the sheer hell of it. by Mike Mavrigian photos by author Some folks love to claim that bigger is not always better. While that may be true in some cases, let’s face it…when the conversation turns to displacement, well, bigger cain’t never hurt. After all, [...]
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