Often Imitated... Never Duplicated

New Product Release

We are proud to announce a couple of new products in our lineup.

Venom Coolers

New Venom Coolers
Venom Coolers

Venom Coolers greatly reduce front drive temperatures, keeping them equal to that of the back of the case - increasing reliability of bearings and seals and eliminating heat soak issues.
Available Now! Call for more details.

Lightweight Rotors

New Lightweight Rotors for Eaton Superchargers

Coming January 2012!

Increase Your Injector Size

Even Flo Injectors

Stiegemeier's upsized injectors can be installed and driven to your tuner without difficulties, unlike new aftermarket injectors which can prevent your vehicle from starting, much less being driven.

Resized injectors are marked in pounds per HR and the cylinder number is scribed on the injector. This will have the top flowing injectors in the hottest cylinders.

IMPORTANT - DO NOT load a higher value file for resized injectors. Simply trim wide open throttle as you normally would through the MAF transfer function. Subtracting 1% for every pound added to your injectors is common.

Injector size X 10 Rich OK at 75% duty cycle
Injector size X 11 Correct at 85% duty cycle
Injector size X 12 Lean OK at 95% duty cycle

Sample: 50pounds X 11 = 550RWHP potential

50% E85 add 10pounds to injector
100% E85 add 20pounds to injector

Sample: 58pounds X 11 = 638RWHP potential at 85% duty cycle. Add 10pounds for 50% E85 injector size to be 68pounds.

There are many factors to fuel delivery such as pump voltage, line volume, hose size, injector tuning, etc. On average, the chart above is a good general rule of thumb.

$175 (8-cyl)
$165 (6-cyl)
$155 (4-cyl)
Includes sonic cleaning and balancing.

Call or email for further information as needed.

Since 2003 Stiegemeier has been THE name synonymous with supercharger porting and modifications. With more than 3000 custom ports done to date, we are The Leaders in EATON Supercharger porting. And as one of the few EATON factory-authorized supercharger rebuilders, we are able to provide you with genuine EATON parts. Frank Yee runs a 9.83!

Supercharger Porting...
Prices From $295.00 and up!
And Backed With A 1-Year Warranty**

Although we specialize in GT-500, Cobra & Lightning blowers and air-flow components, we are rapidly gaining respect for servicing Roush, Saleen, Mini-Cooper, Jaguar, Mercedes-Benz and others.

Photos: Frank Yee's '03 Cobra fitted with a Stiegemeier Stage5 runs a 9.83!

From our state-of-the-art DynoJet to our custom-built SXF-1000 air-flow supercharger test bench we have the technology, resources, and expertise to give you the best your money can buy. And we guarantee more horsepower gain per dollar spent than any competitor!

SnakeBite™ Series superchargers
And StreetKing Kits

SNAKE BITE™
Patent Pending
Stiegemeier Porting Services, LLC
636-949-2275


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