|
BASELINE |
CAI |
| RPM |
HP |
TQ |
AF |
HP |
TQ |
AF |
| 2,500 | 156.01 | 273.13 | 12.96 | 158.54 | 277.56 | 13.12 |
| 3,000 | 183.52 | 275.39 | 13.11 | 184.92 | 277.50 | 13.32 |
| 3,500 | 200.57 | 263.35 | 13.35 | 202.96 | 266.50 | 13.56 |
| 4,000 | 205.43 | 239.76 | 13.34 | 207.53 | 242.22 | 13.50 |
| 4,500 | 205.58 | 215.90 | 13.33 | 206.95 | 217.39 | 13.48 |
| 5,000 | 203.60 | 209.60 | 13.32 | 205.67 | 211.80 | 13.49 |
|
TB |
AFTER-CAT |
| RPM |
HP |
TQ |
AF |
HP |
TQ |
AF |
| 2,500 | 163.52 | 286.28 | 13.16 | 155.62 | 272.44 | 12.99 |
| 3,000 | 191.29 | 287.05 | 13.35 | 185.42 | 278.25 | 13.26 |
| 3,500 | 207.17 | 272.02 | 13.55 | 203.18 | 266.79 | 13.44 |
| 4,000 | 210.91 | 246.16 | 13.39 | 209.91 | 245.00 | 13.35 |
| 4,500 | 210.01 | 220.61 | 13.40 | 210.73 | 221.36 | 13.33 |
| 5,000 | 207.12 | 213.30 | 13.43 | 210.13 | 216.41 | 13.33 |
|
X |
TUNE |
| RPM |
HP |
TQ |
AF |
HP |
TQ |
AF |
| 2,500 | 156.71 | 274.36 | 13.12 | 156.96 | 274.79 | 13.07 |
| 3,000 | 187.86 | 281.90 | 13.23 | 188.18 | 282.39 | 13.26 |
| 3,500 | 210.32 | 276.15 | 13.44 | 212.62 | 279.17 | 13.48 |
| 4,000 | 218.18 | 254.65 | 13.25 | 219.56 | 256.26 | 13.34 |
| 4,500 | 219.44 | 230.51 | 13.23 | 220.83 | 231.97 | 13.32 |
| 5,000 | 216.47 | 222.92 | 13.23 | 218.82 | 225.35 | 13.35 |
|
DIFF |
| RPM |
HP |
TQ |
| 2,500 | 0.95 | 1.66 |
| 3,000 | 4.66 | 7.00 |
| 3,500 | 12.05 | 15.82 |
| 4,000 | 14.13 | 16.50 |
| 4,500 | 15.25 | 16.07 |
| 5,000 | 15.22 | 15.75 |
1) K&N FIPK (PN 57-2502; $250)
2) DynoMax After-Cat Exhaust System (PN 17393; $360)
3) BBK 70mm Throttle Body w/EGR Spacer (PN 1500; $250)
4) BBK X-Shape Pipe (PN 1509; $350)
5) SCT Eliminator Multi-Program Switch Chip (PN 6600; $325)
Our pushrod Fox player belongs...
Our pushrod Fox player belongs to Rob Bieskche (pronounced Bisch-Ski). Rob's '91 LX is sinfully stock, with the exception of an MSD distributor cap and Ford Racing Performance Parts ignition wires, which are OK for this effort.
It pumped out 209.87 rear-wheel...
It pumped out 209.87 rear-wheel horsepower and 275.42 lb-ft of peak torque in its baseline run on the dyno. Not too shabby for a 21-year-old 5.0 with 198,000 miles on it.
Before making the first dyno...
Before making the first dyno pull, Ricardo verifies the timing on Rob's Fox is set at the factory 10 degrees of advance.
K&N's Fuel Injection Performance...
K&N's Fuel Injection Performance Kit is an easily installed upgrade over a Fox 'Stang's OEM airbox/silencer combination. The 12.25-inch conical filter element replaces the entire box and rests in the perfect draw area for intake air.
The diameter difference between...
The diameter difference between an '86-'93 5.0's factory throttle body (right), and the BBK replacement we're testing is 10mm larger (60mm to 70mm). While this change doesn't score a major increase alone, the increased air volume is a big contributor to power gains when all of the upgrades are installed.
The new throttle body is installed...
The new throttle body is installed with a matching (70mm) EGR spacer, but the Fox's OEM intake manifold is only 60mm. After outlining the 70mm's gasket against the manifold's throttle-body bore, Eddie carefully opens up the bore to match the new piece.
After installing the new throttle...
After installing the new throttle body, Ricardo verifies the throttle-position signal (to the PCM) is accurate at 0.99 volts.
A saw of some sort is required...
A saw of some sort is required for removing the factory exhaust on all '86-'93 5.0 LX and GT Mustangs. There's no way around it--the system really seems to be designed for lifetime residence on a Fox.
This photo shows how restricted...
This photo shows how restricted the OEM exhaust system is on Fox 'Stangs. The original tubes (right) measure 2-1/4 inches and are severely choked down by four catalytic converters.
We conducted our exhaust tests...
We conducted our exhaust tests with the converters in place and a DynoMax 2-1/2-inch after-cat system first (featuring Ultra Flo mufflers), and then replaced the converters with BBK's 2-1/2-inch X-shaped crossover tubing.
Here’s a look at the inner...
Here’s a look at the inner workings of Rob’s Pony’s PCM. Before the SCT chip is installed, you must open the processor, slightly modify its case for chip clearance, and thoroughly clean the J3 port.
Similar to the assistance...
Similar to the assistance Blow-By Racing's Chris Jones provides for tuning OBD-II Mustangs, Ken Christley of Kenne Bell is our local hero for burning OBD I chip calibrations. After all of the bolt-ons are installed and tested, Ken modified the stock tune by adding approximately 5 degrees of timing, and making a slight fuel increase to optimize air/fuel WOT at 12.8.