Patrick Guerra's
2000 Pontiac Trans Am WS6, M6
Silent Thunder
The Thunder Racing CheaTR Package!
395 rwhp, 376 rwtq through factory exhaust manifolds, cats and cat-back!
494 rwhp, 510 rwtq with NX MAF kit with 100 hp jets!
Motor mods:
Airflow Research (AFR) 205cc heads, CNC ported, milled .030" yielding a combustion chamber volume of 60cc. Static compression ratio of 11.00 to 1, 2.02 intake valves, 1.60 exhaust valves. Double quench pad combustion chambers.
Stock displacement short block, with stock internals.
Thunder Racing "CheaTR" camshaft: 215/230 duration at .050, .600/.578 lift, 117 LSA installed at 116 ICL by Shane Burgess, Thunder Racing, Inc. Dynamic compression of 8.6 to 1.
LS6 intake manifold.
Motorsport Technology Inc. (MTI) carbon fiber intake lid with K&N filter.
Nitrous Express screenless MAF.
Stage 3 Home Ported Throttle Body (with epoxy entry), hot water bypass.
ASP under-drive crank pulley.
Stock GM exhaust manifolds, catalytic converters, and y-pipe.
SLP Dual Dual catback exhaust from 2002 Firehawk.
Nitrous Express MAF Kit (75-250 hp wet kit). For details on this kit, press here.
NGK TR-6ix iridium spark plugs gapped .038".
Custom pcm tuning by Geoff Skinner of Thunder Racing, Baton Rouge utilizing LS1 Edit, Dynojet Chassis Dyno and a wide-band O2 sensor. Air/fuel ratio set at 13.0 to 1 on the chassis dyno, timing is 26 degrees max (no gains with increased timing), idle speed 850 rpms (18" of vacuum), rev limiter 6800 rpms. With L-Trims locked at 0%, all lower rpm VE tables are within 3% S-Trims. Throttle response is fantastic!
To see chassis dyno run on motor through closed exhaust with the above mods, press here.
To see chassis dyno run comparing the baseline run to adding the CheaTR Cam, the adding the AFR 205 heads, press here.
Driveline mods:
None at this point.
Stock T-56 6 speed transmission with CAGS eliminated with tuning.
Factory Hurst shifter with Lou's Short Stick
Stock GM clutch and flywheel.
Stock GM 10 Bolt rear end, 3.42 gears.
Lots of power can be made even with stock exhaust!
Chassis/Suspension mods:
None at this point.
Stock shocks and struts.
Stock lower control arms.
Stock front and rear sway bars.
Fuzion ZRi Radials 275/45/17 all around.
Just your typical looking Trans Am, but it packs a punch!
Lots of power going through that stock exhaust!
To return to Motorsports Home Page, press here.
