Quote:
Originally Posted by RarlyL8
Did a carb swap years ago on a stock engine that we had already installed SSI exchangers. Changed the world for that engine. Added 10HP, felt like 50HP. Instant throttle response, extremely cool start up sound, like an F1 engine, when starting in the winter below 32°F. Fuel mileage plummeted, I didn't care. All that said, do not do this if you don't have experience tuning carburetors, they are finicky and require fiddling to get them optimized.
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I too went from CIS to weber 40mm carbs on a early 3.0L with ssi's and it was night & day. I would disregard all the suggestions of little HP gain because in my case it was night & day difference. during the dyno tune the car did 206 at the wheels and as rarly states it seemed like more. did not dyno the car prior to the carbs being placed so I assume it was somewhere near the declared by Porsche 180hp. unless your concerns are maintaining value with a unmolested car then fine. if you are looking to wake the car up, go for carbs.
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