Follow along as I build a high performance 914 engine
- Begin tear down
- Long-block to short-block
- Split the case
- Take apart the crank assembly
- Remove the oil pressure relief valve
- Clean up the fan shroud
- Remove secondary oil relief valve
- Replace oil galley plugs
- Clean case halves
- Machine oil pressure sending unit mount
- Measure piston ring gaps
- Dry assembly (TDC & crank end-play measurements)
- Electromotive ignition sensor mounting
- New TDC mark on fan
- Case clearance for connecting rods
- Prepare the camshaft
- Crankshaft assembly and rod clearance
- Rod bearing defects
- New heads arrive!
- Rebuild the alternator for $8
- Modify engine tin
- Setting up to measure valve geometry
- Installing rocker studs
- Measuring pushrod length and valve travel
- Evaluate valve-piston clearance
- Making custom pushrods
- Lapping cylinders to heads
- Modifying windage tray
- Final crank assembly
- Short-block assembly
- Installing pistons in cylinders
- Long-block assembly
- Installing sheet metal
- Distributor drive cover & CHT sensors
- Installing exhaust manifolds
- Modifying Bursch muffler
- Installing transmission
- Rebuilding carburetors
- Fitting velocity stacks
- Building cable throttle linkage
- Making oil pressure
- First start & initial tune
- Preparing for engine installation
- Engine installation
- CHT gauge
- Throttle linkage
- First drive
- On the dyno
Rebuilding Weber Carbs
My fuel delivery will be provided by dual Weber 44 IDF carburetors - they came with the car when I purchased it 15 years ago, but have never been a good fit for the engine. However, I anticipate that they'll be a great fit for it now!
Many moons ago, before having a wife, a family, or even a real job, I remember taking these carbs apart and cleaning them on the kitchen table of my small apartment. Now it's time to actually rebuild them, replace the float needles, gaskets, o-rings and so-on.
For actual steps on how to rebuild Weber IDF carbs, I've found these 2 sites useful: Mark Petry's procedure and John Connolly's procedure.
Here's a shot of all the parts after a laborious cleaning with a nice set of little bottle brushes and a toothbrush.
For no other reason than "I could", I polished the insides of the main venturies. Will it actually help air flow into the engine? Only time will tell if every little bit helps!
One thing I did, was verify that the main jets were seating properly in the carbs. After my first inspection, only 2 of the 4 were correct. So, I "machined" them with my drill until they met my satisfaction.
Now that the carbs are rebuilt, it's time to work on the throttle linkage.
