Hence why putting stupid big wheels on a car really hurts acceleration. Cheers Paul It's actually the other way around. Holden under GM rules measure with all accessories. Ford measure without things such as power steering and aircon. It's actually the other way around.
It also explains the anomaly of mph with rwkw for that weight. Well ok, when they had the 5. It wouldn't make sense. If they quote their figures without accessories then by right the rwkw would be lower than HSV's, not higher. My GTS is as above, but I never had a before figure.. Yes rwhp is basically engine kw. Oh auto's will read about kw lower at the wheels for the same manual due to loses described already. Good info..! Sent from my iPhone using Tapatalk. There is no way in hell a 10,fwkw engine is going to have a loss of fwkw by processing that energy through what kg of rotational parts that build momentum The more HP and more specifically torque that you generate the more ease the engine will have to rotate the driveline of the vehicle.
Not that any of this really ever matters as the car should always be tuned in real world environments and never tuned just purely to produce a top end HP figure. Power loss is a variable. Get Googling and get reading, it's simple physics. If power loss was fixed and we lost hp in our driveline, fitting anything up to a hp motor would not be able to rotate it. Registration is simple and absolutely free so please, join our community today!
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Joined Aug 25, Messages 1, Location Connecticut. Sure, you find the percentage of Driveline loss. Sorry, but doing math that way doesn't work. The percentage of loss cannot be treated as a constant. The only way to truly compare for a specific car and motor is to measure the hp of the motor on both a chassis dyno and on an engine dyno, and then you run into the fact that they are two different dynos. That would mean RWHP should be FredK'03Cobra said:. Click to expand Last edited: May 10, Just take a silly wild assed guess?
Five or seven percentage points can, and will, make a significant difference. People get blasted on this board daily for coming up with numbers that they may believe are correct, but just aren't real. Remember the recent thread about the SLP ad where they claim hp?
Members here blasted SLP for using numbers derived in the same fashion you just suggested. While many folks out there do their math that way, I just choose not to perpetuate the fantasy. No biggie, just a difference of opinion. Posted September 14, Hello How do you calculate rwkw from kw and kw from hp? I have checked online but cant find it. Link to comment Share on other sites More sharing options Posted September 15, Galois Posted September 15, Posted September 15, edited.
Wouldn't the losses change depending on the power put through? It'd be some kind of multi-variable equation. GTRsean Posted September 15, An R34 GTT was quoted from factory at rwkw , a standard one on the dyno usually got around the mark but it varies according to tyres, different diffs, gearboxes [manual vs tiptronic], even the oil and bearings used. For eg.. R31Nismoid Posted September 15, Think about it, hp motor is losing hp kw?
And most stock GTR's make around rwkw on a dyno so it certainly fits quite nicely. Whoa there! Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community.
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