Swap out the old broken Blaupunkt Toronto for something new
This is relatively straightforward as long as you dont mind a little electrical connecting. (Please dont use Scotch Locks think about the next person rewiring in ten years time swearing at you)! You will also need a little patience. My personal choice would be to retain a Blaupunkt or OEM Porsche Becker look. Why not add Satelite Navigation at the same time? Both Becker and Blaupunkt produce systems that fit in the standard head unit space in a 928.
Blaupunkt Accesories catalogueHere you can find detailed information on cables, converters and replacement Aerials.
Blaupunkt Travelpilot E1 / Blaupunkt E Freestyler
More info from Blaupunkt's site if you click the picture
I actually had the E1 unit fitted to my GT so I know that it works in the 928. My points of note are below. the E1 required a Speed Pulse connection to the electrical system of the car which cost money and time to get right. The latest Freestyler models do not need this anymore which makes them completely DIY ready.
- Looks like a very original fitment in the daylight.
- Blue and Red at night. Looks great.
- Great to have Sat Nav in the 928 without fitting extra screens.
- Once you have Sat Nav you can't not have it.
- Revised models dont need a speed pulse connection
- Fits in the Dash
- Lets you eject the Nav CD to play another CD
- Turn arrow and voice based Navigation is excellent but no room for a moving map display
- TMC traffic information access wasnt enabled on my CD, would have cost extra. (this may have got better - its really a good thing to get)
- Works well, proven in my own 928 GT
- Phone Based Sat Nav may be better as its more portable.
Speaker and speaker cable replacement in the Porsche 928
Perhaps more difficult but the sound difference is astonishing with a modern setup. the speaker technology has moved on immensly since the 928 was produced. Cables now benefit from Oxygen free technology.
Blaupunkt make triple purpose GSM mobile phone, Sat Nav, and FM aerials. One Aerial - three connectors. Hard work to wire in but worth it.
Head unit upgrades
Things to consider:
- Original look or doesnt matter
- Industry standard ISO connectors arent fitted to the 928 as original wiring so connectors with fly leads are needed for most modern radios, external link to http://www.bluespot.co.uk/stock/iso.asp
- Its much easier to see whats going on in the centre tunnel wiring if you remove the sidewall carpet by undoing a couple of screws.
- The original amp speaker connectors are a DIN cable. Blaupunkt make an adapter.
Speaker and speaker cable replacement
Perhaps more difficult but the sound difference is astonishing with a modern setup. the speaker technology has moved on since the 928 was produced.
Its hard work though.
Here is the door panel removed showing that there are two original speakers and a crossover on this 1989 GT. The crossover stops you pulling the cable free just pulling a new cable through using the old cable. Its screwed to the door lining. It wasnt designed to ever be removed!
Replacing them with a modern JBL 2 speakers and crossover system requires patience. To my mind though it was essential to remove the old crossover and replace it with a modern one. I wanted an all new electrical path from the head unit to the speakers with all new speaker cable.
The new oxygen free wiring is blue.
The speaker wiring has to be fed through the cable tunnel between the door and the bodyshell.
Essential equipment - a wire coathanger and some duct tape! Tape the end of the speaker wire to the coathanger and push it through.