| April 2002, The cyl. head is clocked in the lathe, we just can't decide on the squish angle. 0, 20, 30 or 40 degrees, which will generate the most efficient chaos............ Valve job is finished as well as relieving around the valves. Valve guides are machined for installation of seals. March 2002, The Bathtub Heads are coming together, fixture is done for the squish angle machining. valve guides has been fitted with K-line bronse inserts inorder to improve the guide precision. Guides are set at factory specs at manufacturing but that's a generous tolerance band. Valve guide seals will be fitted and we are waiting for a grinder with the right cut and spindle. We would have machined the guides pre installing if new guides would have been fited but these are new heads and I decided to work on the installed guides. The new pinion bushing is machined and installed, again using improved Cala's tooling with the turning supported by drive side timkens as well as the pinion side race, this assures corect loc. of the hole for the bushing and the final broach of the bushing after installation. Initial Setup first 10000 K, 6500 Miles. STD Engine Cases machined to fit knuckle lifter Blocks and 3-5/8 cylinders, The S&S 4-3/4 Stroke Crank wheels that came with the purchase are replaced by Truett & Osborn 4½ Heavy iron Wheels. Heads and Cylinders are Flatheadpower manufactured. Stefan Gronkvist (Castings) has performed special work such as weld build up on the inside of R/H Case and drilling of the return oil passage from the lifter blocks, he also did fit and clearance and final assembly. Cam is Leinweber 425 and Carburator Mikuni HSR 42. Pistons & Rods are forged S&S and Comp. is set to 9.44 -1.. Lessons learned at the initial setup, Check your engineblock in proper fixturing, so far "Cala's High Performance" is the only shop I have found whith the right tooling. see pictures on top. Block manufacturers has different approaches to initial setups and in my case STD are completely lost when it comes to deck location If you are going to use 12 Volt generator with a original Knuckle Cam cover, replace the bolts with Allen head and machine the cover to flat bottom holes, In my case weld build up has to be done as the cover was very thin at the upper hole. Another way to do it is to put HeliCoils in the Gen. and use the 6 volt Bolts. All this is due to original bolts are tapered to the cover holes and dia is larger for 6Volt v.s the 12 Volt. Special work in the initial assembly Aluminium welding of R/H case for the lifter block oil return. Drill and plug return oil passage. Machine intermediate gear for camshaft clearance. Set compression height.. Machine cam cover for countersunk generator bolts incl. weld build up to add material around holes. After 6500 Miles the engine was completely disassembled and inspected. 1. Pinion bushing was slightly loose in the cover, no damage but has to be replaced by OD including machining of the cover. 2. The nylon piston pin buttons did produce wear marks on the cylinder walls, both sides, need to be looked at by either using better designed buttons or use different type pin locking device. honing req. 3. The engine block was checked and found to be ok parallell to the crank but deck angle was 46,5 degrees and most significant rear cyl deck .0200" (0.5mm) higher. corrected. Also the block is setup as a 2 degree fwd tilt from STD but Knuckleheads should be 0 degree, no reason to correct as the stroker is challenged for clearance to the rear head anyway, just an observation. 4. Front exhaust valve guide was cracked most likely caused by over length., no noticed effect on performance, heads to FHP for upgrade, new heads with bathtub chambers are being prepared. 5. Fr. Head cover oil leak on intake where it contacts the head under the spring. 6. Dyno run and 68,10 SAE HP and 117 Nm SAE Torque. new run after the reassembly with bathtubs is planned. 7. Distributor housing for the AMM ignition is not waterproof and puts the sensors under water unless properly sealed. O-ring groove to be machined in the cover and proper wire boot installed. |
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| Engine block machining fixture, fits all types including zero level flatheads and knucks. This STD block is 2 degree fwd. tilt, but that's ok as it gives more room for the rear cyl in the frame. |
| Bathtub" head as it comes from FHP, in the fixture we manufactured for valve and squish machining, "The Chunk". Balance weight can be adjusted |
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