resurrecting n old thread. sorry, but i cant pm just yet..
did you ever post up the full engine build spec ? im looking to formulate a plan for my own engine and yours would be the perfect one to base it on
thanks
Andy
I posted some of this before. Here is the spec: (apologies for any repetition).
New Weber 40’s (151) with 32 mm chokes for street tractability but engine still develops substantial horsepower (181) and torque(143) at streetable rpms (7K redline). The elevated output belies the common wisdom that Weber 45’s and larger chokes are needed to generate this level of power. The new SAS Weber CNC head, when set up properly appears to breathe better than the original castings.
New SAS Weber head. Street (not racing) ports. Engine builder(Dave Vegher) did some additional porting. Redid valve seats from as delivered.
Removal of all combustion chamber sharp edges (detonation hot spots). No pinging on pump gas. 32 degrees total advance.
Valves: Manley Mfg. supplied. Stainless steel with hardchrome finish on the stems. 1.625" on the intake and 1.375" on the exhaust
Cams: From Kent Cams. Lift .440" gross .oo8" lash cold 250 degrees duration measured at .050" lift. 105 lobe center on the intake and 107 lobe center on the exhaust .010" lash on exhaust cam
Formula Ford SCAT crank, square main bearing caps. 7K redline.
Long 4.928" rods, ARP 2000 bolts
Custom forged CP racing pistons, 3.2765" in diameter, Engine Bore 3.2795
Displacement: 1700 cc (1692)
10.25 compression ratio, pump gas (US 91 (R+M)/2 octane)
Custom made 26R deep airbox and mounting plate (smaller stock Weber airbox reduced bhp by 7hp on the dyno)
Extra large bore 4.2.1 race systems exhaust manifold, center pipe, and silencer
Extra large triple cross flow aluminum radiator for extreme power and temperature, swirl pot
Electronic ignition and rev limiter, Pertronix
Electric fuel pump (Facet, low pressure, high flow) with Aeromotive regulator (3 psi)
Custom baffled engine sump to reduce cornering oil pressure losses
Lightened flywheel (Fidanza), saves 7.5 pounds and provides more dynamic spin up of engine. No loss of
smoothness at idle or in street driving.
Magnesium bell housing, saves 12.8 pounds. Sourced from an “underweight” racing 26r GTS (Craig Chima)
High torque, lightweight starter motor from Speedwell (saves 4.1 lbs)
Oil cooler (SETRAB) with thermostatic sandwich bypass
Alloy oil breather catch can. Placed in nose.
AN fittings (black) with “classic” reinforced hoses used throughout for fuel, oil, coolant
High pressure oil pump (necessitates new 0-100 psi dual gauge instead of original 0-60 psi)
Uprated engine mounts
TTR Weber throttle cable and spring return system
Custom fabricated knurled knob dipstick with O-ring
Alloy screw on oil filler cap, non-leaking compared to original spring loaded version
Lightweight alternator