5.OL BXR Production Sand Cast Manifold Test Results: The above engine was run on the dyno with a stock EEC-IV and 40 psig
fuel pressure on Amoco premuim unleaded. The engine
idled @ 800 rpm with 15 inches of manifold vacuum. Gain over the
Ford GT-40 with the same components at 5800 RPM was up 75 HP!
MAX HP
Current testing on a 5.OL V8 with the following specifications:
- Weisco 10:1 pistons
- 1 3/4" headers
- Stock crank and rods
- Iron Dart II heads, 2.02 intake 1.60 exhaust
- B-302 cam 224/224
- 280 cfm intake, 210 cfm exhaust, 600 lift
- 1.7 rockers
- 75mm throttle body
- 77mm Pro-M meter 36# injectors
TORQUE
377 #ft of Torque @ 4700 RPM
WIDE BAND
366 HP Avg. from 4000 to 6700 RPM
FULL DYNO RESULTS FOR THIS SETUP WITH A BXR MANIFOLD
5.8L BXR
The 5.8 liter BXR was applied to a Fontana Aluminum
small block which was bored and stroked to 449 cid. This was to test
the extremes of range of displacement that the BXR could contend with.
This combination has run 10.76 sec @ 126.54 mph with a 3500+ pound street
Mustang on pump gas and mufflers, catalytic converters and tail pipes!
The engine specifications are as follows:
- Weisco 10.65 pistons
- 2 1/8" headers
- Moldex crank, 4.25 stroke
- 254 degrees duration, 1 121 degrees lobe center with 0.630 lift
- TFS heads
- 2.125 intake, 1.625 exhaust
- 320 cfm intake, 240 cfin exhaust @ 28 inches, 600 lift
- Fontana aluminum block, 9.5 deck - 81 mm Pro-M meter
- 36# Boshe injectors
MAX HP 601 HP @ 5700 RPM
TORQUE 600 #ft of torque @ 4800 RPM
TOP TIME
10.37 sec @ 130.6 MPH
(with a 3300+ pound street Mustang on Pump Gas and Mufflers, Catalytic
Converters and Tail Pipes!)
The same 5.0 BXR manifold with no changes to
port window, injectors, fuel rails, mass air meter or throttle body was
fitted to a street/strip 342 cid 8.2" deck height motor. The engine
has a mild mechanical street roller cam advertised duration 288 degrees
intake, 300 degrees exhaust with 0.586 intake and 0.613 exhaust lift.
The heads were Ported TFS aluminum, the pistons 12.5:1. 290 cm intake,
220 exhaust flow.
When the GT-40 manifold was fitted to this engine,
the peak power was reduced by 43 hp, peak power was at 5300 rpm.
At the 5800 rpm level, the GT-40 hp was down 75 hp! The GT-40 test
was run with the same injectors, mass air meter, throttle body, ignition
system as in the BXR test so that true one-to one comparisons can be made.
The same benefit found on the 5.0 was found on the Stroker 5.0 It should
be noted that the GT-40 was modified to straighten the inlet to side plenum
to improve its performance.
MAX HP 483 HP @ 5800 RPM
TORQUE
465 ft# @ 4800 RPM
TOP TIME
400 ft# @ 2800 RPM
