Quoted power figures

[blindswelledrat]

I know this is a long running debate but I couldn't find a specific thread so if this is a repost- apologies.
Is the 480bhp quoted by Nissan at the wheels or engine ? Which do other manufactureres quote?
Have any standard ones been dyno'd yet?

Cheers

[Philip]

Originally Posted by blindswelledrat

Is the 480bhp quoted by Nissan at the wheels or engine ?

At the engine.

Originally Posted by blindswelledrat

Which do other manufactureres quote?

At the engine.

Originally Posted by blindswelledrat

Have any standard ones been dyno'd yet?

Yes.

Phil

[blindswelledrat]

And do you know the result of those dyno tests i.e. do Nissan underexaggerate thier power?

[mindlessoath]

nissan has advanced technology used throught the whole car. it exhibits 15% drivetrain loss when done on a dyno. at the engine, its rated at 480hp. friction losses are reduced to an unprecedented 10 percent or so

for those who dont know claim its 600hp, but thats false.

motor trend also is going to prove this (but i doubt they know how to realisticly).
Nissan 360 Day 1: Things I've Learned | Car News Blog at Motor Trend

Nissan engineers insist the GT-R really does only have 480hp. Motohiro Matsumura, president of Nissan Technical Center North America, Inc. in Farmington Hills, Michigan, says our dyno test story which revealed the GT-R develops 430hp at the wheels is basically right. But he insists our estimate of a minimum 15 percent friction losses -- which suggests the GT-R is making 507hp -- is wrong. Matsumura-san says ultra-low friction bearings in the wheel hubs and transmission, plus the careful alignment of the all-wheel drive system's propshafts, mean friction losses are reduced to an unprecedented 10 percent or so. We're going to get a GT-R back and conduct some coast-down tests to see if he's right.

[R33_GTS-t]

Originally Posted by blindswelledrat

I know this is a long running debate but I couldn't find a specific thread so if this is a repost- apologies.
Is the 480bhp quoted by Nissan at the wheels or engine ? Which do other manufactureres quote?
Have any standard ones been dyno'd yet?

Cheers

482bhp@hubs

R35 GTR dynoed - 482bhp@hubs!

[SkylineUSA]

Power figures are worthless. I do not know why some people get so wrap up into them. That is why a 300hp car can beat 800hp car, because if you just look at the power output, your missing the boat on how cars work.

[supracat]

am sure i've seen power figs at about 530bhp quoted somewhere, but i imagine it all comes down to conditions on the day, dyno (have seen 10-15% swings on a dyno), fuel etc.....
i'd be quite happy with 500+, but at the end of the day numbers mean nothing - its how the car drives, handles, feels, and brakes in comparison with other car.

[Phoenix]

As soon as I get my GT-R I will be going to a dynojet and have it measured properly.

Not a mustang dyno, not a dynagay.

I want to see it to the wheels. with no boost increase / ECU tweaks, no exhaust, no increased octane (91 octane US), no games.

[supracat]

Originally Posted by Phoenix

As soon as I get my GT-R I will be going to a dynojet and have it measured properly.

Not a mustang dyno, not a dynagay.

I want to see it to the wheels. with no boost increase / ECU tweaks, no exhaust, no increased octane (91 octane US), no games.

Hi mate,
i noticed you quoting 91 octane - are US octane readings on a par with UK??? - if so, it seems a big difference as i was expecting to the UK GTR to require 98 octane at least! - are US cars effectively 'detuned' to run on 91?, OR..............., am i being thick somewhere????

[Philip]

Originally Posted by supracat

Hi mate,
i noticed you quoting 91 octane - are US octane readings on a par with UK??? - if so, it seems a big difference as i was expecting to the UK GTR to require 98 octane at least! - are US cars effectively 'detuned' to run on 91?, OR..............., am i being thick somewhere????

Different ratings - UK is RON; US is RON+MON/2.

US 91 is comparable to UK 95.

Phil

[supracat]

cheers Philip.
does this mean that all GTR's (incl. UK) are set up to run on 95 ron petrol then???

[Philip]

Yes, but you would see benefit from 97/98 which I imagine will probably be what is recommended.

Phil

[Phoenix]

Originally Posted by Philip

Yes, but you would see benefit from 97/98 which I imagine will probably be what is recommended.

Phil

After the 91 octane (US)/ 95 octane (UK), I am going to throw some 100 octane (US) and see if I gain some timing from the ECU. The ECU appears to be adaptive

[SkylineUSA]

Pullin for the Celtics, good luck'with the rest of the playoffs, I hate Detroit.

Go Steve Kerr Go!!!!!!!!!!! I am from Peoria/Glendale area.

[Phoenix]

Originally Posted by SkylineUSA

Pullin for the Celtics, good luck'with the rest of the playoffs, I hate Detroit.

Go Steve Kerr Go!!!!!!!!!!! I am from Peoria/Glendale area.

My mechanic lives in Peoria. I am trying to get him priveleges at a Nissan dealership. VERY good mechanic. Got me into the 10s last year (street-legal). Should be interesting to see what he can do with a GT-R.