Quote:
Originally Posted by chrisbalich
Not particularly worried about heat, AC, sound deadening, or dealer serviceability.
I do want cross-country reliability and tire wear.
I also intend to drive the car to work and to the store.
It’s the spirit of the GT3RS that I’m looking to capture. A track car disguised as a street car. Savage enough to put down good lap times, refined enough to drop off a kid at school.
Attaining an outright comparable level of performance will be a huge challenge financially. But scaled down proportionately to the age difference seems (at least in theory) plausible. “If Porsche made a GT3RS in 1979, it would be this.” is what I’m trying to wrap my head around.
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Completely get this. Same road map for me in my 930 build. I think the most important variable in capturing the GT3 spirit Is refinement, actually. Not sound-deadening, cold-AC-blowing refinement, but chassis tuning, and a tractable ECU map, plus the all-important gearbox. If you manage to get all the bits to work in harmony, as-in tune the suspension to work best at the ride height and tire type you intend to run, it will start to get closer to the GT3-esque benchmark ("feeling" not outright performance). Without spending massive dollars, it will be impossible to match the GT3. I know you get this, but that's where most go wrong in chasing a benchmark. It's actually harmony. Why else does the ole' OG '73 RS still rank so high in comparo tests? Because it's dialed-in to use all of its abilities at a high performing harmonious level.
You've got that dialed-in feeling just about everywhere in your project, judging by the result, the aesthetic sensitivities, and even the writing style and your approach to documenting the build. It's yours, and it shows. Now you just have to make a couple of key decisions, and realize them to the full potential that your budget and chassis can provide. Get the suspension dialed-in, to a high level of engineering detail, (geometry, bump steer, the most appropriate damping vs torsion bar specs, with great tires). I bet it will start to give back the GT3-style feedback you seek. Then follow up with some WEVO bits for the 915, and fine-tune your ECU tune.
After all, it's nice that Porsche absolutely tried (and succeeded) in capturing the spirit of the old air-cooled performance-variant 911 in every GT3 variant. They just upped the ante a bit (ok, a lot).
Will be watching this, more great stuff to come I'm sure.