Super Charged 2005 Chevy Z71
· Fully Loaded LT, Z71 4X4, Leather, Bose Premium, Satellite Radio, Tow Package Metallic Storm Gray, 3.42:1 Locking Differential.
· Engine – I started with the stock Aluminum Blocked RPO Code - "L33" 5.3 Liter 330 HP V8 at the crank translating to 267HP verified at the wheels. The L33 was a new issue for 1500 trucks in 2005 and only 25% of the extended cab 1500 trucks made in 2005 were shipped with the L33 engine. Since there has been a mixture of the iron blocked LM7s' and the L33s' in the trucks.
A roots type Eton Supercharger kit by MagnaCharger, their Radix 112 intercooler model. Installed August of 2005 @ 5K miles. Current Pulley is a 3.4" providing 7 PSI of Boost. HPTuners Tuned. Gates belt, tensioner, steel idlers and pulleys. Under hood photo and Dyno history listed in order of stock engine with "No Supercharger", "Supercharger" with Magnuson supplied Superchips tune with 3.5 inch pulley, and recent pulley size drop to 3.4 HERE.
Tuning including MAF and VE tables, WOT plug reading and more was performed by mecanicman.
· Exhaust –Corsa Performance Touring Edition Cat back system for great performance with in-cab comfort. Loud on the outside only when romped, always nice inside. With GM's improved exhaust manifolds this system really complements the performance package of the truck without demanding an aftermarket exhaust header system.
· Transmission – The factory 4L60E transmission lost its 1st gear thrust bearing @ 44k miles. We took the opportunity to convert it to the GM 4L65E specifications, including the extra clutches in the 3-4 pack, a better sun shell, a 5 gear planetary gear set, better input and output shafts along with all the other GM upgrades going into their 4l65E transmission. The shift kit contains all Sonnax parts and valve body configurations using their Performance Pack (p/n HP-4L60E-01) and their 2nd, and 4th gear "Super Hold" servos. All frictions are aftermarket performance parts. A fantastic behaving transmission build. The truck is a 4-wheel drive via electronic transfer case.
Torque Converter - The stock converter bit the dust @ 68k miles. I replaced it with a Circle-D 300 mm Stock Stall unit. I like to crawl in the North GA mountain back roads and a high stall is not suited to my style. I went with a Circle-D to better handle the added torque.
· Gears – Locking 3.42's are a perfect match for the added low end torque providing spunk off the line and pure joy on the highway where she really breaths well.
· Suspension - Bilstein HD Shocks all around. Airlift Company's Ride Level Control rear air bags filled by Viair's 450c air compressor with in cab gauge and controls. The compressor is a 100% duty cycle 150 PSI unit. For keeping the ride level when loaded and a very fast tire fill setup.
· Tires – Michelin LTX M/S2 P265/70R17. These replaced the LTX M/S after more than 66k miles on 7/20/13. The M/S were speed rated @ S=112 mph. The M/S2's are T=118 mph. The compound changes can really be felt in the wet. Great Tires.
A Tire test by FOURWHEELER Magazine Found Here tells of the M/S2 improvements over the M/S version.
· Brakes - Front rotors are R1Concept Premium units with Raybestos Police Formula (Tahoe P/N)Pads. The rear system uses Raybestos Advanced Technology drums with GM OE shoes. Brake lines are the Russell Performance braided stainless steel three line kit providing a faster and firmer pedal feel. Brake fluid is Valvoline's Synthetic DOT 3 & 4 and is changed regularly using Speed Bleeders.
The above braking modifications just add to the already great braking that came on the truck. In 2005 GM went to drum brakes on the rear of their 1500 trucks. They were the largest rear drums installed on any truck in this class at the time. With a stronger master cylinder and going from 12 to 13 inch rotors and larger dual piston calipers this truck stops really nice. GM contracted Bosch to get it right and they also re-proportioned the system to give the rears the proportional bite required.
Most folks were confused how going from disc to drums on the rear was an improvement. All I can say is this truck stops really great. The upgraded components listed here contributed greatly to ending pad material transfer to the rotors some mistake for rotor warping.
I want to add that I have had trouble with material transfer (some call it warping) onto the rotors in the past. It came rather easily when doing any degree of aggressive braking but since going to the R1Concepts Premium rotors and the Raybestos police pads its been nothing short of amazing in how much the stopping distance has shortened, and after several braking sessions that would have had me turning rotors this combo is showing no signs of material transfer. I have not ran the Raybestos Police Pads or R1Concept rotors without each other so I cannot say who is the main contributor but this combo is a winner.
· Radar/Laser Detection - Lidatek Laser LE-30 Jammer providing excellent and reliable warning while scrambling police laser probes for 5 seconds while I heat up the breaks. The Escort 9500ix Radar Laser detector with GPS aided false alert prevention is a really great radar detector.
· Bed Cover – ACI AGRI-Cover Inc's Access limited edition Tonneau cover. After trying several other brands this is simply the best cover system and material out there. It still looks and works great after 8 years of use.
· Head Lights - High beams are modified for optimum brightness with – Kennedydiesel.com's light booster wiring harness powering Philips HIR1 (9011) and HIR2 (9012) Halogen Infrared Reflective bulbs. Factory fog 35watt lamps are replaced with 65watt 9005 lamps. Reverse lamps - are the 3156 CREE 5W Reverse LED's from retro-solutions.net. A significant upgrade from the 50Watt halogens found on the market.
This truck is really fun to drive. Somewhat of a wolf in sheep's clothing it looks, feels and handles like any stock truck running smooth and quiet not consuming any more fuel than a normally configured engine ....... until we mash it. The supercharger screws are bypassed under normal loads only coming into play on demand. The exhaust flows really well but is very quiet in the cab at all times. When we need to pass or harass she demonstrates a very noticeable amount of added power and noise getting the job done nicely as the blower whine turns heads. She will do 130mph @ 4500 RPM and still be climbing.
The power configuration is balanced to provide great amount of performance increase without sacrificing reliability. With nearly 400 horsepower at the wheels in the heat of the summer she is not the average running pickup. I romp it every time I drive it.
Updated 11/27/2013 @ 68,205 Miles