[Dyno and Graph]:GT3 RS 3.8 vs GT3 RS 4.0 and Specific Output list.

[-=Hot|Ice=-]

Very impressive! The GT3 RS 4.0 makes the most HP per liter in the NA group!


We bow down in respect to Porsche. This is some of the most impressive factory stock specific output we have ever seen. To hit over 100 wheel horsepower (not crank horsepower) per liter is a feat we have not seen many factory stock motors over 4.0 liters accomplish with the F430 Scuderia being the only other one in recent memory with 459 wheel from its 4.3 liter. 457 wheel horsepower in STD correction from a 4.0 liter flat-6 is absolutely absurd and this is by far the most powerful production naturally aspirated six cylinder the world has ever seen.

The 997 GT3 RS 3.8 hits 116.38 wheel horsepower per liter. The 4.0 hits 114.25 wheel horsepower per liter. The F430 Scuderia is at 106 wheel per liter. The GT3 RS is rated at 125 crank horsepower per liter but that crank ratings even looks conservative to us.

How about that the GT3 RS 4.0 is making just over 100 horsepower
at the wheels more than an E92 M3 4.0 liter V8? Same displacement, two less cylinders, and 100 more at the wheels. Ladies and gentlemen, that is some of the most impressive engine building the world has ever seen from a production naturally aspirated six cylinder motor. Porsche squeezed out a ridiculous amount of power and 4.0 owners are certainly getting their monies worth. We do not have enough superlatives to bestow on Porsche, phenomenal.









GermanBoost - Porsche 997 GT3 RS 3.8 liter versus GT3 RS 4.0 on the dyno - 419 vs. 457 rear wheel hp + highest specific output list

 

[330CIZHP]

Very nice. It is one of my most favorite engines of all times.

Although, the comparison to S65 M3 engine is quite valid since M3 is an FR layout while the GT3 RS is an RR layout. That is relevant because the drivetrain loss in RR layout is 4 - 5% less than in the FR layout since the engine and driving wheels are on the same side while in FR layout, the drive shaft transmits the power from front to back resulting in higher drivetrain loss.

At any rate, I still think the S65 engine is a gem in its own right. Yeah, it does not put down as much power as a 4.0 Liter H6 in the 4.0 GT3 RS, but I am sure it is because M division did not want to make that much power from the engine. Also, having 8 ITBs in the S65 engine is something now that is becoming a novelty. If you look at the GT2 P65 engine, it makes 490 HP from the same 4.0 Liter block.

 

[Mr Robert]

I agree, the S65 is, could I suspect, built with rather different aims...