We had many questions asked what our intentions are with the project. The initial intent was to build 2 917 replicas, mine to be for road and track, and John’s other for track only. But as I started to develop the chassis, it soon became clear that to build 2 repeatable chassis, would require a complex jig. So in parallel to developing the chassis, I started to design the chassis jig. And then to get similar repeatability for the suspension mounting brackets, I designed front and rear suspension jigs.

Then as we started to build the first chassis, it became clear that the jig was working very well, and that we could build repeat chassis to within a tolerance of 3 to 4mm for the main chassis, and 1 to 2mm for the suspension mounting brackets. And with everything designed in Catia, it also possible to offer a bespoke service to customers, to package seat, pedal, wheel, and gear change position to suit individual driver ergonomics.

And we can offer the same bespoke service to provide complete CAD design to package whatever engine and gearbox customers might want. Including water cooled Porsche engines, and in fact any water cooled engine. As the engine bay is designed to original dimensions and in fact we can fit an original flat 12 engine and box. We had one chap who was seriously interested in fitting big block V8, and I’m confident this could be done as well. Would need to investigate side mounted rads, and carry out fluid dynamics, to insure they would work efficiently.


140314RRphotofromLaura2reducedwebRace Retro, where to start. First I would like to extend my thanks to Mike (John’s son) for committing to transport the chassis and body to and from Race Retro. Without his trailer, getting the chassis and body to the show would have far more difficult. So after spending the necessary time making sure the chassis and body were well secured to the trailer, we headed out from the ARRK workshops around mid-day.

After fighting the traffic on the M25 and the M1, we eventually arrived at Stoneleigh at 4.30. And quickly realised we were one of the last exhibitors to arrive. But we quickly unloaded, and rolled the chassis with front and rear body onto the stand. This was directly opposite the McLaren stand. So although an expensive pitch, have to say it was a great location. Eventually finished setting-up around 9.00, and headed-off the B & B in Warwick.


Homebrew 917 goes public at Race Retro.

Wow Race Retro, where to start: Well let’s start with the 3 weeks before; which I have to say were very hectic. So what did we manage to do in the 3 weeks before, well see the list below:

 1 Complete the initial designs for the 964 engine and inverted G50 gearbox mounting cross members and the mounting brackets for these to the chassis, completed in Catia. And then have a set laser cut.
 2 Then have both the engine and gearbox mounts these tacked together. And have the chassis mounts tacked to the chassis, in preparation for the first engine fitting the week before Race Retro.



Original Article first appeared at on 20th December 2013. Written by Dan Trent. See original article.

homebrew917-pistonheadsPHer buys 917 bodyshell, cracks on with building the rest himself

'Hi Mr Editor' began an email arriving in the PH inbox this morning. "You may recall back in early August 2011 a rather negative article on your website about a 917 bodyshell for sale."

Uh-oh, who have we upset now...

Reading on it turns out not to be an angry email but in fact a fascinating one. You can read that original story here but the basics were that a fibreglass Porsche 917 bodyshell from a mould taken from David Piper's (yes, him) original car was up for sale. And we suggested that the best use for it might be to turn it upside down and use it as a canoe. Ahem.


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