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Having your classic 911 sit on its wheels in a well-balanced manner makes an incredible difference in its road behavior. Sounds like it makes perfect sense, right? You’d be surprised what we find has been done to guests at the TwinSpark Racing Lair!

To be able to fit short, RSR or Turbo trailing arms (no, they are not the same…), a modification to the non-RSR (who owns a real one these days?) non-Turbo tub needs to be performed. The pick up points for the rear trailing arms need to be raised and moved sideways. This allows the short trailing arms to provide a sturdier stance to your car.

Sounds easy, but to get this cut and weld job done accurately, a special rig is needed to simulate the set up of the rear suspension. A few year ago we found out that we couldn’t drop our 1973 RSR (originally a 1973 [...]

Leonard recently unearthed a Porsche press release from 1972, talking about the transmission changes for that year: the arrival of four speeds as standard and five speeds as optional, and the replacement of the dog-leg pattern on previous 911s. This release heralds the arrival of the Porsche 915 transmission and is interesting stuff, though I wonder if its really about countering objections on why five speeds now cost extra.

To match the increased power, a new, stronger gearbox has been developed by the engineers. Due to the greater flexibility of the engines, and the associated wider power range, the standard unit could be reduced from five to four gears thanks to the better torque. For all those who do not want to forego the fifth gear, a likewise newly designed five-speed gearbox is available as optional equipment.

I came across some confusion on a Porsche forum the other day, where one user was telling another that WEVO do not make a transmission mount for the Porsche 915 gearbox, only the G50.

This is incorrect: WEVO does make transmission mounts for the Porsche 915 gearbox. Users can chose from blue and black pillows for Porsche transmission mounts: semi solid and a bit softer. I have blue in my 1976 Carrera 3.0 and would not change them, but lots of our customers use black quite happily in more road-biased cars.

WEVO originally got into Porsche tuning parts as an engineering challenge. Australian Hayden Burvill is a trained design and vehicle performance engineer who has worked on Formula 1 cars, Group C racers and the most successful Indy cars. Indy cars brought Hayden to the USA and he bought a 911. [...]