Link to Miami Porsche services subpage: intro | black Porsche speeding on smooth highway
Link to Miami Porsche services subpage: engine & transmission rebuild | porsche engine rebuild in progress
Link to Miami Porsche services subpage: handling | porsche suspension including strut, arms, and top of vented brake disk
Link to Miami Porsche services subpage: Body Werks | close up of grey porsche's right rear body panel
Link to Miami Porsche services subpage: interior | black leather porsche interior with sport seats
Link to Miami Porsche services subpage: modification & restoration | modified porsche with twin turbos in place of rear bumper

Your Porsche

your way.

Link to Miami Porsche services subpage: ppi | silhouetted man standing next to porsche against amber sky
miami porsche CAD view of spin-on fuel filter head
miami porsche owner's mechanical drawing of spin-on fuel filter shown to GP for discussion
miami porsche owner's sketch of spin-on fuel filter for 1985 porsche 3.2 liter engine
miami porsche owner's CAD rendering of spin-on fuel filter bottom view

Above: Customer's vision for replacing their nut-on Porsche fuel filter with a spin-on unit.  Original sketch, one of several mechanical drawings, then images of CAD file. Part is CNC'd in 6061 aluminum. CAD Credit: Jim Pedersen, Valiant Engineering. Below: Just-received part is exactly as anticipated. Design for mounting will be fine tuned. Taps for connectors will be made and filter head will be installed together with new fuel lines and injectors. Owner's preference is to nickel plate fuel rails. 




Visualizing ideas comes easier to some than others. With this in mind and if necessary, GP can provide renderings of what's being conceived. This can be as simple as a quick sketch to express a rough impression of the finished product, or, the presentation can be done to very realistic standards via computer rendering. Ideas can also be modeled to scale. Rendering work is done by a Porsche contact that does this sort thing. GP makes the introduction and steps out but for engineering input if needed.

Materials & Processes


Just about everything can be altered in form and finish. Skill and material knowledge is required. When something needed doesn't exist, it can be made. 


Center Console Config Compare.jpg


Modified AC control unit developed for Porsche center console. Arduino-driven, unit features 2 1/2" LED displaying various temps and control settings. System operates off temp & humidity sensors placed inside evaporator, outside car, and inside cabin. Above: Presentation with option to include 2 paddle switches between stock Porsche AC control knobs. Below: Build in progress. Dimmer switch is incorporated so display does not annoy at night. Leather covered module fits into existing console cubby.

110 Engine From Below Rack.jpg

Low milage Motronic-driven engine has replaced high milage CIS-driven engine in this "modification." Alternative to this mod was to rebuild CIS engine. The owner is very pleased with the move from CIS to Motronic.

Turbo Modification

There are any number of ways to turbo charge an existing normally aspirated Porsche engine. At left is an exposed version where the turbos---twins in this case---are positioned at the very rear of the car where the bumper used to be. This is an aggressive design/build solution given both turbos and their plumbing are exposed. The downside to this is there being no rear-end protection. Were another car to even slightly hit the rear of this car, damage to the custom work here would be painful. Turbo mods are more typically embeded with the engine ahead of the rear bumper. Adding boost sensibly requires other modifications to support the increased power output an engine creates under boost.

Porsche Knowledge


Whether you're interested in a restoration to some degree, or an interesting mod, it's good to have many years of Porsche knowledge on your side. GP.  

To Top of This Page

To Next Page  |  Porsche "PPI" - for prospective Porsche buyers: expert pre-purchase inspection  

This Website At-a-Glance  |  Sitemap



The 935 was Porsche's factory racing version of the 930 prepared for FIA-Group 5 rules. Introduced in 1976, the 935 became one of the most successful racing cars in history. Originally configured with fender mounted headlights, Porsche discovered a rules loophole concerning fender modifications and subsequently redesigned the car's leading edge to minimize drag and increase downforce. The result was the "slantnose."


Protective modification is installation of on-board camera(s). Purpose being to record who-did-what in the event your Porsche is damaged. Typically installed looking forward, adding a rear-looking unit takes coverage a step further. To be very aggressive, side units can be included.

Porsche Restoration & Modification



GP restoration is for owners that don't require every nut & bolt to be refinished, and the body taken to raw metal while on a rotisserie. That level of work is for a dedicated restoration shop. Instead, GP offers owners with classics the service, skill & experience to restore "somewhat worn" Porsches to excellent form. This entails rebuilding the engine & transmission if needed, removing prior owner mystery-mods, replacing old, unreliable and nonfunctioning parts as called for, cosmetic attention inside & out, and attending function needs so the car---in whole---is returned to dependable, system-wide working order. And appearances car-wide suggest an extremely well kept Porsche. The investment here is specifically suited to an owner planning to keep their Porsche for the long term. Jump to Mod / Modification.


01 Control Panel Switches.jpg
Photo of blue Porsche Targa with custom intake air scoop added
Scale clay model of custom air intake for Porsche 911
Scale clay model of custom air intake for Porsche 911

Customer's idea for a rear lid scoop. What has yet to be studied is air flow in that area of a Targa. Until air-flow patterns are known at various speeds, and air intake numbers are calculated, this is an interesting idea the value of which has yet to be proven.

Click photos to enlarge

miami porsche spin-on fuel filter head bottom view of fuel in and outlet
Close up of Top side of spin-on fuel filter head for Porsche modification
Close up of front side of spin-on fuel filter head for Porsche modification
Custom spin-on fuel filter and inline pressure gauge has been added to Porsche 3.2 engine


1979 Porsche 930. This resto is "extensive" in mechanical and cosmetic terms. It is NOT a "rotisserie" restoration. Much of the car and engine were unmodified so returning it to very near original form---as was the owners goal---was a relatively simple matter. Rebuild of engine & transmission restored performance to like new. Minor remnants from prior owners modifications were removed to eliminate future questioning. Electrical issues were corrected so that all the car's lighting works as it did when leaving the showroom. All systems were refreshed and brought to correct & reliable working order. Interior was redone with upholstery done in full grain leather. Worn trim and exterior lenses were replaced with new. Missing rubber bits were installed. Worn paint was refinished according to the original paint code---custom blended to match the car's existing paint color. Worn stickers were replaced adding to the car's fresh look. The outcome is not only a classic Porsche that has an amazing appearance, mechanically it now stands in prime form. 

Completed restoration of 1979 Porsche model 930 shows car in near new form
Exterior driver-side view of restord 1979 Porsce model 930 turo
Porsche black leather interior restored to original condition
Restored 1979 Porsche model 930 steering wheel newly recovered in full grain black leather
Close up of restored 1979 Porsche model 930 chin area
Restored 1979 Porsche model 930 stone guard installed 30 mm from fender lips
Close up of Restored Porsche model 930 exhaust area
Restored right head light area showing new "sugar scoop" ring and rubber button inserts in 1979 Porsche model 930
Restored 1979 Porsche model 930 close up of tea tray tail
Detail Turbo Signature.jpg
Rebuilt 3.3 ltr. turbo engine for restored 1979 Porsche model 930.
Close up of new 3.3 ltr. turbo engine cooling fan
Rebuilt engine's new oil return tubes and refinished air injection plumbing in restored 1979 Porsche model 930
Restored 1979 Porsche model 930 fuse panel
Restored air conditioning front codenser fan in 1979 Porsche model 930
Front hood of restored 1979 Porsche model 930 is open showing new trunk carpet
Restored front trunk lighting in 1979 Porsche model 930
Restored engine lid light in 1979 Porsche model 930
Restored 1979 Porsche model 930 tool kit
Looking straight down on restored 1979 Porsche model 930 sunroof featuring new seals
Restored sunroof chrome trim and air dam in 1979 Porsche model 930
Restored black leather interior of 1979 Porsche model 930
New engine sticker on restored 1979 Porsche model 930 air intake
Purolator sticker on top of restored 1979 Porsche model 930 air intake
Spare tire operation sticker is original to this restored 1979 Porsche model 930
Front of modified Porsche 935 racing around corner


Porsche Mod / Modification


Regarding modification, GP can offer valuable advice based on 30+ years attending both street and track Porsches. And, the mechanical engineering expertise needed to guide solutions so they'll work & last. Depending on the mod, GP may accomplish the build for the owner if this is what is sought. Consult with GP in advance.


Porsche has been modified with twin turbos installed where the rear bumper used to be

Click photos to enlarge

Click photos to enlarge


Porsche® at the 24h of Nurburgring

Video presentation courtesy of Porsche N.A. Permission on file.

GP AutoWerks:


7011 S.W. 46th Street

Miami, FL 33155


Porsche Logo
Porsche Club of America Logo

Independently Serving

The Greater Miami

Porsche Community

Since 1979

Miami Porsche Service, Repair & Rebuild Shop

GP AutoWerks

Miami's Master Porsche Mechanic

For Classic & Contemporary Porsche Sports Cars.


Disclaimer: Porsche, the Porsche crest, and Porsche car model numbers & names are under licensed use by Porsche Cars North America, Inc. (PCNA) from the owner Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Porsche AG ("Porsche.") The PCA logo is the property of the "Porsche Club of America." The "Porsche Museum" name is the property of Porsche. No association or affiliation with Porsche, PCNA, The Porsche Museum, or PCA is intended or implied by GP AutoWerks, an independent Miami-based Porsche service, repair, rebuild & PPI shop that offers comprehensive Master Porsche mechanical care for classic & contemporary Porsche sports cars---356 through 991, 928, 944, Boxster, and Cayman. Any use of the word "safe" or "safety" in this website holds a car's owner and/or driver ultimately responsible for all matters concerning the operational safety of the car being driven or otherwise in use. Credits: Videos are Porsche productions presented for educational & entertainment purposes only. Permission for presentation is on file. Outlined photos are editorial content. Photos of Miami Porsche service, repair, rebuilding and PPI depict the property of GP AutoWerks' customers. All such photos are used with the expressed permission of GP AutoWerks' customers. Photography, unless credited otherwise, is © 2015-2020 Karl Hansen. All rights reserved. Photo captions are provided to reflect photo content and credits appear where due.

Website © 2015-2020 GP AutoWerks. All rights reserved.

Mobile Device Content:


Miami Porsche Service, Repair, Rebuild & PPI  |  GP AutoWerks

Page: Resto & Mod / Restoration & Modification



& Mod


Your Porsche.

Your way.

Porsche restoration.

The preservation of automotive fine art. You want someone with genuine expertise attending this. A mechanical artisan. An individual who'll interpret your vision without compromise. And, be a vicious guardian of your budget and project quality. Porsche mods are similar. Only instead of being bound to the past, your Porsche is a blank canvas of sorts. A venue where you are free---to a degree---to express your creative vision. Resto or mod, genuine Porsche expertise and artisanship are found here.

1979 porsche 930 restored at gp autowerks
1979 porsche engine that is gp rebuilt with restoration

1979 Matching #'s

engine for 930 pictured above.

To know more about your Porsche restoration & modification options with GP, please call. Or, visit the desktop site where you'll find much more info along with additional photos and curious Porsche facts. Visit: 

PORSCHE Service / Repair / Rebuild / PPI



Porsche 911 engine case with one side restored to original clean state.
porsche engine that is a gp rebuild with restoration
porsche engine with twin turbo modification
Porsche 930 sport seats restored
porsche valve covers show difference between bath and blasted clean parts.
3.2 porsche engine that is gp rebuilt with restoration
Porsche Logo on Porsche Service Repair P
Porsche Club of America Logo on Porsche

Porsche, the Porsche crest and Porsche model names are the property of Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Porsche AG ("Porsche") and is under licensed use by Porsche Cars North America, PCNA. The PCA logo is the property of the Porsche Club of America. No affiliation with either Porsche or the Porsche Club of America is intended or implied by GP AutoWerks, an independent Porsche service, repair, rebuild & PPI shop located in Miami, FL., U.S.A. Any use of the word "safe" or "safety" in this mobile site holds a car's owner and/or driver ultimately responsible for all matters concerning the operational safety of the car being driven or otherwise used. Please see desktop website for full disclaimer and credits.


© 2015-2020 GP AutoWerks. All rights reserved.