Visited the Dyno yesterday...

I visited J&M Performance yesterday to have my recent addition (ATI P-1SC) checked out. Before going I gapped the plugs to .035 (NGK Iridium). Some relevant mods:

Stock 1999 4.6L 2v Block w/ 44K miles
Stock PI Heads
ATI P-1SC w/ 3 Core Intercooler
42# Fuel Injectors
ECU Reflashed by T&J Performance (Cobrakiller)
75mm Accufab TB
Ported Intake Plenum
Walbro 255LPH In-tank Pump (soon to be Steeda Dual Pump)
FMS Shorty Exhaust Headers
Basani X Pipe w/ Cats
Borla Cat-Back


and the verdict is......

379.4 Hp
338.1 Tq

Tuner couldn't believe how well the ECU A/F was setup. Rev limiter came on a little early and ignition advance was fairly conservative.

Dave

Actually hp & tq results were highest on the 3rd run but tuner printed that run on a page w/ power and a/f ratio (no tq info). I can't recall what it was so I sharing actual figures (tq from second best run). The belt wasn't slipping. I'll have to look into that. No boost gauges & no printout so no info on actual boost. I'm running a 3.4 pulley which I've been told by ATI techs yield approx 7.4# boost on '99 cars.