Patrick Guerra's
2000 Pontiac Trans Am WS6, M6
No Compromises!
The Ultimate Daily Driver!
508 rwhp, 445 rwtq Street Trim
Kooks headers, custom y-pipe with LG y-merge collector, QTP 4" electric cutout and SLP dual/dual catback!
To see a graph of the dyno run, press here.
To see the 183 mph run in the Texas Mile, press here.
Motor mods:
Airflow Research (AFR) 205cc heads, CNC ported. Heads hand finished by Tony Mamo to increase combustion chamber size to 4.00" bore which further unshrouded the valves. Valve job was modified to increase flow at low and mid lifts., Heads were milled .060" yielding a combustion chamber volume of 57cc. Static compression ratio of 11.92 to 1. 2.02 intake valves with lightweight hollow stems (98 grams each), 1.60 exhaust valves. Double quench pad combustion chambers. AFR #8019 valve springs shimmed to within .050" of coil bind. 170 seat pressure, 450 open pressure. 1.775" installed height.
AFR 205 flow in milled form with 57cc on a 3.900 bore at 28" H2O:
Lift........ .200", .300", .400", .500", .550", .600"
Intake.....158, 220, 264, 285, 296, 300
Exhaust 122., 178, 217, 232, N/A, 241 (with pipe)
Fel-Pro 1041 .041" head gaskets to give a .031" quench.
Custom Comp Cams camshaft: 3729R/3731R HR 112 +3
238/242 duration at .050, .605/.610 lift, 112 LSA installed at 109 intake centerline. Dynamic compression of 8.86 to 1.
To have Patrick Guerra spec you a custom cam, press here:
Comp Cams 7.400" chrome-moly pushrods to accommodate the milled heads and smaller base circle of the cam.
Yella Terra Ultra Light #6645 shaft mounted rocker arms (with .050" shim installed).
Comp R (875-16) hydraulic roller lifters with .035-.050" plunger depth. 3/8 to 1/2 turn of the rocker bolt from 0 lash until 22 lb. ft. of torque.
FAST 90 intake manifold velocity ported by Tony Mamo from Airflow Research. This porting has been shown to be worth 7-10 rwhp/rwtq over an unported FAST intake. To see a dyno comparison between a Mamofied FAST intake vs. an LS6 intake with stage 3 ported throttle body, press here.
Nick Williams 90mm throttle body vs. stage 3 epoxy ported stock throttle body.
Motorsport Technology Inc. (MTI) carbon fiber intake lid with K&N filter. Mezeire electric water pump.
Custom 4" bellows mates air lid to throttle body. No Mass Airflow Sensor.
Custom PG Ram Air spacer allows a tight seal between hood scoop and air box. Composite material is 1" thick.
ASP under-drive crank pulley.
Kooks Stainless Steel headers with custom Y-pipe utilizing LG Motorsports 4" merge y-collector and QTP 4" electric cutout. Stage 8 locking header bolts.
SLP Dual Dual catback exhaust from 2002 Firehawk. Polished stainless steel. To hear an idle clip, click here. To see a driveby video, click here.
NGK TR-6 spark plugs gapped .045".
Custom 347 ci short block built by Erik Koenig at HK Enterprises in Houston, Tx.. Diamond forged pistons, file-fit rings and pins. ARP main studs. ARP rod bolts. Ported LS6 oil pump, shimmed for higher pressure. Cloyes timing chain. Cloyes Hex-a-just adjustable timing gears. ARP 12 point head studs.
Racetronix Delphi/Lucas 37lb./hr. high impedence fuel injectors (42 lbs. at 4 bar). Racetronix plug and play fuel system. Enough capacity for over 650 rwhp.
Custom MAF-less speed density tuning utilizing EFI Live, Dynojet Chassis Dyno and a wide-band O2 sensor. Air/fuel ratio set at 12.5:1 at peak torque and 13.0 to 1 at peak power on the chassis dyno. Timing is 28 degrees at peak torque and 30 degrees at peak power (no gains with increased timing), idle speed 850 rpm, rev limiter 7200 rpm. With L-Trims locked at 0%, all lower rpm VE tables are within 3% S-Trims. Throttle response is fantastic!
Driveline mods:
Stock T-56 6 speed transmission with CAGS eliminated with tuning.
Factory Hurst shifter with Lou's Short Stick.
Textralia OZ700 X-Grip clutch and billet flywheel. ARP Flywheel bolts. 2002 slave cylinder. Drill mod performed on clutch master cylinder. McLeod adjustable master cylinder.
Stock GM 10 Bolt rear end, Genuine GM 3.73 gears. Torsen limited slip differential.
Chassis/Suspension mods:
Koni single adjustable shocks front and rear.
Strano lowering springs. 550lb front/150lb rear.
PBR Metal Master brake pads with Brembo Blank rotors from Sam Strano.
1LE lower control arms.
Sam Strano 35mm front sway bar, stock rear sway bar.
UMI double adjustable panhard bar with spherical rod ends on both sides.
Firestone Firehawk Wide Oval radial tires 275/45/17 front & rear.
Here are the awesome B&B Triflo quad tips on my SLP Dual Dual exhaust!
Happiness is owning cars with beautiful wheels!
To see chassis dyno graph of the Trans Am with 223/227 .637/.639 110LSA Torque Cam, press here.
To see chassis dyno comparison between race trim and street trim (when running the 231/234 .643/.598 112LSA TRak Cam), press here.
To see chassis dyno comparison between adding FAST 90mm intake/NW 90mm TB/85mm MAF vs. LS6 intake/ported 75mm TB/75mm screenless MAF, press here.
To see chassis dyno comparison between adding Kooks headers and catted y-pipe vs. running stock exhaust manifolds and cats, press here.
To see chassis dyno comparison between Thunder Racing 231/234 TRak Cam vs. Thunder Racing 215/230 CheaTR cam press here.
To see chassis dyno run comparing the baseline run to adding the CheaTR Cam, then adding the AFR 205 heads, press here.
To see the web page of the 2000 Trans Am in CheaTR Package form, press here.
To have Patrick Guerra spec you a custom cam, press here:
To return to Motorsports Home Page, press here.
