How? (SLR McLaren's engine)

[SL500]

hi
does anybody know how the hell can mercedes produce 617 hp from a 5.5 liter s/c V8 ?(actually that engine is the SL55's modified engine)
and SL65 amg has a biturbo V12 6.0 and it produce 612 hp,nearly the slr's horsepower and its Displacement is pretty high + it has a V12 and 2 turbochargers,
im really confused

( SL65 produce more torque tough-738 lb-ft @ 2000 rpm and SLR's : 575 lb-ft @ 3200-5000 rpm)

is it for the supercharger?

[Slicks]

hi
does anybody know how the hell can mercedes produce 617 hp from a 5.5 liter s/c V8 ?(actually that engine is the SL55's modified engine)
and SL65 amg has a biturbo V12 6.0 and it produce 612 hp,nearly the slr's horsepower and its Displacement is pretty high + it has a V12 and 2 turbochargers,
im really confused

( SL65 produce more torque tough-738 lb-ft @ 2000 rpm and SLR's : 575 lb-ft @ 3200-5000 rpm)

is it for the supercharger?

Different tuning, the SLR is more of a perfomance oriented car than the SL65. The V12 most likely has a much lower compression ratio too, and running low boost from the turbos, although it makes an increadable amount of low end torque.

[megotmea7]

making power is not directly related to the number of cylinders or the displacment of the engine, you can have a 1.6 liter honda I4 pushing 650hp just as you can have a 3 liter 2jz I6 or a 1.3 liter rotary. it depends on how the engine is built, how much pressure the F/I is pushing, cams, redline, compressions, how the intake and exhaust is set up, etc.

[NAZCA C2]

The SLR has a supercharged engine. With a supercharger it's pretty easy (especially with todays engines) to make well over 100hp per liter.

[Egg Nog]

hi
does anybody know how the hell can mercedes produce 617 hp from a 5.5 liter s/c V8 ?(actually that engine is the SL55's modified engine)

Just to correct something, the SLR's engine only shares the displacement with the SL55... it's a different block, different heads, and even a differnt lysolm-type supercharger. I don't even think they share one part.

It doesn't really seem too amazing to me that they've acheived this amount of. With forced induction especially. Koenigsegg has gotten over 800hp from a S/C 4.7 litre block, and that's not even near what might be considered the limit.

[@wall]

hi
does anybody know how the hell can mercedes produce 617 hp from a 5.5 liter s/c V8 ?(actually that engine is the SL55's modified engine)
and SL65 amg has a biturbo V12 6.0 and it produce 612 hp,nearly the slr's horsepower and its Displacement is pretty high + it has a V12 and 2 turbochargers,
im really confused

( SL65 produce more torque tough-738 lb-ft @ 2000 rpm and SLR's : 575 lb-ft @ 3200-5000 rpm)

is it for the supercharger?

i thought it was 626 bhp it produces??? i am sure that is what clarkson said on top gear....

[SL500]

thanks guys

[SL500]

i thought it was 626 bhp it produces??? i am sure that is what clarkson said on top gear....

i got that number from fast-autos.net
but maybe youre right

[SilverArrowZ]

i still like the 2JZ, stock block goes up to 970hp with some crazy souping up.

i wonder how much one can soup up the engine of the SLR

[silverhawk]

i have a brochure of the SLR & it says that the SLR is 626hp not 617hp.

[KOT]

tuning. it should do the trick. By the way, talking about tunning, my beemer produces much less power than sposed to, and it really increased my 0-60 time. why? help plz.

[Matra et Alpine]

tuning. it should do the trick. By the way, talking about tunning, my beemer produces much less power than sposed to, and it really increased my 0-60 time. why? help plz.

How have you measured the power ?
How have you measured the time ?
... and ... what are you using as a baseline ???

[megotmea7]

i covered in the other thread

[Guibo]

i have a brochure of the SLR & it says that the SLR is 626hp not 617hp.

626 DIN PS = ~617 SAE net bhp

[Ferrari Tifosi]

Yep, displacement and number of cylinders doesn't dictate how much power an engine can make. Remember the F1 turbo era? 1.5 liter twin turbocharged V6's making anywhere from 1000-1500 hp.