78 MGB Engine Rebuild Performance Goals
Before beginning this project, I had a series of goals for it: Key elements were for both major & incremental performance increases with an emphasis on achieving a torquey hill & mountain climber with decent in-town economy...
Torquey Hill Climber with Good Street Characteristics: My goal before I started was to have:
- A high-torque, high-pep hill climber (for the mountain roads that surround Reno, Nevada – with mountain passes all the way up to 8,950’)
- Good street characteristics, and
- Decent economy for around-town driving
Consultation from Experts: I wrote up the specs (in considerably more detail) and sent them around to a number of people who specialize in high-performance engines – then implemented their recommendations… and then some.
Key Engine Elements: I ended up focusing on several key elements:
- Hot-tanked and over-bored
- Everything balanced that could be
- New, high-volume Weber DCOE 45 carburetors
- Dual cold air intake system with under-car air rams
- Tri-alloy MSX cross-flow head for heat isolation & dissipation
- Oversize double valve springs and special valves
- Roller rockers with rocker oiling system
- MSX "street-racing" cam optimized to the MSX cross-flow head
- High compession pistons
- High-performance / racing spec engine internals (190,000 psi)
- High-volume oil and water pumps
- Electronic ignition and high capacity coil
- Oil thermostat to warm up the oil quickly
- 19-row oversize oil cooler to keep the oil cool once the engine is running
- Relocated oil filter (from under carb to near coolant overflow container
- Exhaust maniifold cooling system with under-car air ram
- Extra engine compartment thermostatically-activated cooling fans
- All braided hoses in the engine compartment
- Monza header and flow-through exhaust system
- Overdrive transmission to lessen engine load and increase fuel efficiency
- Any other means of incrementally increasing power and efficiency
| MSX Cross Flow Head with Heavy Duty Springs |
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| Weber DCOE 45 Carburetors |
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| Pierce Manifold for Weber DCOE 45 Carbs |
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| MSX Cam Optimized to MSX Cross Flow Head |
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