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TJakobs

How does porsche get 450hp out of a 3.8l 6 engine?

I'm looking for ways to get my 3.5l v6 engine to 350hp, currently at 268hp. Im also very curious on how porsche gets 450hp out of its 3.8l flat 6 engine in the 911 gt3 rs.

669 day ago

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JoshTken 		The Europeans built good cars, so do the Japanese. A 2 litre Evo can develop 340bhp.

Posted 669 days ago

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Vinyzwrld 		Unlike most engines that are designed with a minimum of research and development, Porsche engines are basically racing engines that are designed for road use to good drivability and emissions. For instance, an American V-8 is a truck engine, reworked for passenger cars. Lot's of torque, but doesn't turn high RPM's. A V-6 is now standard in many cars because it is a very cheap engine to manufacture(instead of an inline-6 in a BMW, which can turn close to 9000RPM's)

It costs a LOT of money for R & D, and then to make a return on such small numbers of cars sold.

Most likely, without a single turbo or supercharger, you can't get to 350HP from an original 268.

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pTracy 		Volumetric efficiency.

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Vinyzwrld 		Why?

Sure you can increase the compression, hold the valves open longer for better breathing, etc. but when you increase the hp, you decrease engine life.
So what is the point when you already have more than you can safely use?

If you want to accelerate faster, then lighten the car by leaving out the spare tire, jack, AC, extra seats, or even take off the roof, extra glass, etc.

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topgearzy 		The New 911 Turbo S actually gets 530 horsepower out of the 3.8 liter engine.

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JoshTken 		A lot of expensive technology. Light weight parts allow it to rev to 8,500 rpm. Variable valve timing. Variable intake manifold.

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topgearzy 		Porsche gets 530 HP and 480 lb-ft torque out of the 3.8L engine (9.8:1 compression ratio) in the new, 2011, 911 Turbo S. They get 620 HP and 620 lb-ft torque out of the (older) 3.6L engine (9.0:1 compression ratio) in the 2011 GT2 RS. Both of these are (twin) turbocharged engines with intercoolers. The newest Porsche designs use variable vane turbochargers. The turbocharged engines typically red-line at 6,750 rpm.

The latest GT3 and GT3 RS Porsches, with the 3.8L engine, get 435 and 450 HP -- without turbochargers. The GT3s use lightened, forged pistons and connecting rods, and an improved valve train to allow the engines to rev to 8,400 rpm; they have 12.0:1 compression ratios.

You have to keep the GT3s' engines screaming near the limit to achieve that power; they're not intended for everyday driving. These are really race cars made street legal. They only develops 317 lb-ft of torque.

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