Turbo 4.9 on the Dyno
We had the opportunity to rebuild a customers 1981 301 Turbo and have it dyno tested.
THE SPECS:
Block
- 1981 301T Block
- .030" over bore (making it 306 cu. in.)
- Forged, Flat Top Pistons
- Stock Connecting rods, shot peened and fitted with ARP Rod Bolts
- Stock 301T Crankshaft
- Moly piston rings
- TTA Performance 252H Comp Cam and 301 Lifters
- Comp Cam true roller timing chain
- Luhn Performance grooved cam bearings
- BOP Engineering One Piece Viton Rear Main Seal and oil pan gasket
Heads
- 1981 301T cylinder heads
- Ported behind the valve seats on intake and exhaust (ports are still stock size)
- Removal of AIR pump "bump" in exhaust port
- Narrowed valve stem casting boss
- Stock size valves with performance valve job and back cutting
- Stock intake ports and intake manifold ports (no porting)
- TTA Performance head gaskets
- Stock 1.5 ratio rocker arms
Turbo and misc.
- TTA Performance upgraded turbo
- Ported carb plenum to match turbo
- 1980 301T carb with upgraded jets and metering rods (for dyno)
- 1980 301T distributor ESC by passed (for dyno)
- TTA Performance 2.5" down pipe
- TTA Performance prototype shorty header system
- TTA Performance water/alcohol injection
- TTA Performance manual boost controller (set to 14 psi)
- Stock 1980 air cleaner and paper air filter
- TTA Performance plenum coolant hose (engine tested at 140° water temp)
- 93 octane pump gas
- Timing set to 30° total timing