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How much horsepower should I expect?
I'm just wanting to know what kind of numbers I should expect on my next dyno run so I'll know if these mods are doing what they should.
1999 Mustang GT Convertible
----------------------------------------------
-BBK Shorty Headers
-UPR O/R X Pipe
-Magnaflow Catback
-Steeda Underdrive Pulleys
-BBK 70mm Throttle Body
-J&L Short Ram Intake
-3.73 gears
-Automatic Transmission
-Professional Products Typhoon Intake Manifold
-SCT 4-Bank Eliminator Chip w/ custom 93 octane race tune
So what kind of numbers am I looking at here?
I would say between 305 and 320. You have a good list of parts on your mustang. With a convertible though you're going to be about 150 or 200 lbs more than the coupes.
Throw some 4.10s on that auto to help get out of the dig faster. The automatic transmissions have lower gear ratios than the standards (Auto 1st: 2.84, 2nd: 1.56, 3rd: 1.00, 4th: 0.70 --compared to Manual 1st: 3.37, 2nd: 1.99, 3rd: 1.33, 4th: 1.00, 5th: 0.67) so switching to 4.10s won't hurt your gas mileage that much if any over the 3.73s in there now. It will make your car that much quicker and help with the few extra lbs on your vert.
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