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     We specialize in:  GT500/Cobra-Jet,  '03-'04 Cobra,  SVT Lightning,
                                   Plus CadillacMini-Cooper,  and more
Red GT500
   
 

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Stiegemeier Porting Services, LLC
2140 S. Old Hwy 94
St. Charles, MO 63303
(636) 949-2275



GT-500 Options and Pricing

We are a full service Supercharger rebuilding and repair facility.   We don't outsource our repair work as many competing repair shops do.

For more information on the Snake Bite™ Kit, click HERE

Be sure to check out the Stiegemeier Front-Drive Reconfiguration Kit
we call it"The Multi-Stage Boost Kit"

Stiegemeier's Own GT500    Multi-Stage Boost Kit

Snake Bite -- 16#'s of boost and 575 to 600RWHP with stock pulleys and belts.
"There is no easier way to power up your GT500"
We have kits up to 650RWHP with the OEM M122 and kits up to 750RWHP with the TVS.
Also available for Cobra-Jet.



The following table lists our current GT500 options and pricing.

GT 500 Supercharger Porting and Options: Result Price
Stage 1 - Blueprinting and basic porting - Superchips XCalibrator II Tune 500 RWHP $295
Stage 6 Porting, Series 2 Throttle Body, Plenum 50+ RWHP $995
2.6" Factory Style Steel Pulley 25+ RWHP $145
2.6" Aluminum Pulley With Hub 25+ RWHP $190
Snake Bite™ Series Blower Upgrade 100+ RWHP $1295
Snake Bite™ Series Blower Upgrade, Series 2 Throttle Body, Plenum 135+ RWHP $1795
Polished Aluminum Pulley and Hub   $190
TVS - Snake Bite™ Series Blower Upgrade 100+ RWHP $1295
TVS - Snake Bite™ Series Blower Upgrade, Series 2 Throttle Body, Plenum 150+ RWHP $1795
TVS - Series 3 Throttle Body 1450CFM 25+ RWHP $600
Lower Intake Porting With Welding 15+ RWHP $750
CAI - GT500 2200CFM - will support 1000 RWHP   $495
Single Crank Breather Kit   $87.50
Dual Crank Breather Kit   $175
NGK 4177 TR6   $50
NGK 7317 TR8   $50
Show Polish Available - Call For Pricing    
Here's the Stiegemeier History of GT500 Performance!

White GT500GT500 Graphs

Click each stage for more detailed information
Stage 1 500 RWHP Stiegemeier Tune - SCT XCal II device
Stage 2 525 RWHP Stiegemeier Tune plus Cold Air Intake
Stage 3 550 RWHP Stiegemeier Tune plus CAI + 2.6 Pulley + Idler
Stage 4 575 RWHP Stiegemeier Tune + CAI + Pulley + Idler + Stiegemeier Ported Blower + Throttle and Plenum + NGK plugs
Stage 5 600 RWHP Front drive reconfigured for 2.2 Pulley. 18-lbs of boost.

Eaton Rebuilding Procedures:

  • The unit is fully disassembled and all parts checked for wear, the case is thoroughly inspected for rotor rub.

  • Front drive is completely disassembled. The shaft is checked for straightness, all bearings and seals are replaced.

  • Front drive coupler is inspected for wear and replaced if necessary.

  • Front rotor drive plate bearings- measured for wear (replaced if necessary)

  • Rotors are then phased to corrected position and assembled.

  • Rotors are inspected for point wear and flaking, if your rotors are black they are Teflon coated, the wear on these are not susceptible to flaking. If you have painted rotors that are gray and flaking we recommend stripping the rotors which eliminates any chance of further damage done from deteriorating finish.

  • The supercharger case is completely inspected for rotor rub. The rub is from contact of the rotor during rotation. This is always evident and more prominent if rotor speeds were increased from smaller pulleys.  These areas are marked for added clearance and machined to eliminate all rubbing.  In addition to obvious wear issues, contact of rotors on a case will cause heat build up.

  • Rear case bearings are inspected and greased, replaced if needed.

  • All parts are high pressured washed at temp of 190 degrees for 30 minutes to ensure all components are absolutely clean.

  • Reassembly then takes place ensuring all bearing press and tolerances are triple checked and torque set to factory specks.

  • Supercharger oil is added. All other lubricants are fully synthetic and high-heat tolerant.

  • The outside of your supercharger case is inspected for paint imperfections and touched up if needed.

  • The by-pass valve is installed and calibrated for correct boost-charge and climb. If your valve is broken we can most often fix these at a small cost and replacements are available.

  • At time of rebuilding we can install a optional size pulley for increased boost - we have many sizes available.

  • Porting your supercharger is an option that will increase the efficiency of your blower, adds boost in many cases, and lowers inlet air temps. 

  • Porting the blower also increases your HP.  The exact amount of power gain is based on many factors.  Some of the more important factors are your engine displacement, pulley size, headers/exhaust combination, ignition and plugs and the quality of your tune.  For example, a properly tuned 03' Cobra with a reasonable choice of exhaust and pulley could improve as much as 50 HP (maybe more).  However this same car with fouled out plugs and/or improperly gapped plugs may only gain half the HP.  Basically the quality and combination of modifications will either amplify the effect of the ported blower or tend to mute it's effect.

  • Also, please keep in mind that not all engines are equal.  A Mini-Cooper motor simply does not have the capacity of air flow that a Cobra motor has.  For instance, if you start with 150 HP and gain 15 HP from your ported blower, that is the same percentage gain as a 400 HP engine gaining 40 HP

   
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