With respect, how can you not understand his simple example of how other cars put down the same whp and are rated for much less?


He's making a point.

 

Pointing out that a vehicle rated 260 HP from the factory
is dyno'ing at what most Z's are, which is supposed to be a 287 or 300 hp vehicle.

 

my Z put down H236T228 stock. time for MODS!!

 

how do they get away with claiming higher hp #'s? not to sound naive but where are the regulations? where's the proof behind the pudding? every new car should come with a dyno graph proving their hp ratings......who agrees with me?

ehhh...im just venting over here......is it 5 o'clock yet?

 

Not quite yet

I might have to slip out the back door!

 

well, their rating has aways be bhp...meaning engine output at the fly wheel, which never accounts for drivetrain loss (it's not there yet). If you put your engine out and tried to rate the power of that, i'm sure you'll get somewhere close to the 287 range.

 

287hp engine should but avg. of 235whp.
However, the '06 is the 300hp, so it should be slightly higher.
If I had to guess, it would be around 245whp. (18% loss)

 

On a DynoJet Dyno I've been seeing an average of 232rwhp 226rwtq SAE Corrected.

 

technically, ecr33 skylines came with 4 different engines.
2.4l 4 cyl.....junk
2.5L 6 cyl non turbo
2.5L 6cyl turbo aka rb25det
gtr's only came with the awd monster 2.6L TT aka rb26dett

i tend to know a little on these cars.....

 

18% is a huge loss number. Unless the Z drivetrain saps that much HP?? Maybe it does? I do think the Z motor is a tad bit overrated to sell more cars.

 

for the Z, 18% is pretty average actually.
287 - 18% (51.66) = 235.34 which is what the avg. Z owner dynos stock from what I have seen.
Of course, sometimes you have the person that dynos 220hp and then the other one that dynos 240hp, but in the end it averages out to around the 230-235hp range.
All of this also depends on the dyno.
Remember that the 287hp is most likely Nissan's BEST motor dyno; they won't quote the average for marketing reasons because it will be lower. If they were able to get 290hp at the crank ONE time, then they would say our engine has 290hp

 

Here is my best baseline SAE Corrected:


This is what I have seen on all baseline dynos except for an '04 with 50+k miles and he dynoed at 236whp and 228? wtq.

 

18% is a pretty average loss for a rear wheel drive. It is even more for an AWD car (~22-24%). The only way to get less loss is to have a front engine/front wheel drive or a rear engine/rear wheel drive car.

 

I would say you do.

 

or buy an SRT-4!

 

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