ir_fuel Posted November 5, 2006 Share Posted November 5, 2006 Hi, I had my completely stock 2006 Z dyno-d the other day to see how much Nissan lies in the given specs, and they do apparently 275 hp at the cranck, and 310Nm. The guy did several 350Z's already, none which got to their listed figures, the other 2006 he did had 270hp, and the older models all had around 260hp. Apparently same story for RX8, S2000 etc, basically all NA engines. E.g. an M3 which is listed at 343hp usually has around 320. The only NA engine manufacturer to have its numbers spot-on is Porsche apparently. For Turbo'd engines the results are much better generally speaking, because they are easier to finetune to get the correct hp (playing with boost pressure). Oh, and above 5k rpm the car was running too rich, but that seems to be happening to all 'stock' cars, so nothing new there. I ll try putting a scan of the run online in a couple of days. Quote Link to comment Share on other sites More sharing options...
Baptist Posted November 5, 2006 Share Posted November 5, 2006 Nice one. All manufacturers seem a tad optimistic with the power figures for cars, it seems. Quote Link to comment Share on other sites More sharing options...
H5 Posted November 5, 2006 Share Posted November 5, 2006 Is yours a 2006MY car, I presume you're saying it should be nearer 300bhp? Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 5, 2006 Author Share Posted November 5, 2006 well, the older models (280) all give 250-260 real hp when measured Quote Link to comment Share on other sites More sharing options...
bernmc Posted November 5, 2006 Share Posted November 5, 2006 I've heard similar things from the boys aty WRC, who also said that Porsche figure were very accurate. Fair variation between differnt makes of dyno's too, so make sure you use the same one every time if you're tuning. Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 5, 2006 Author Share Posted November 5, 2006 Yeah, also my idea. You can use this as a reference, if you want to measure performance gains (or losses ). But you need to always test on the same one. If i m not mistaken Porsche actually tests each car before it leaves the factory to ensure it has the correct amount of hp. Well, the premium you pay to get one should make a difference somewhere Quote Link to comment Share on other sites More sharing options...
StephenG Posted November 18, 2006 Share Posted November 18, 2006 If i m not mistaken Porsche actually tests each car before it leaves the factory to ensure it has the correct amount of hp. Well, the premium you pay to get one should make a difference somewhere Hmm. It would be a bit f*cking pointless running it in then if they had it going full beans on a dyno prior to accumulating any mileage. Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 18, 2006 Author Share Posted November 18, 2006 If i m not mistaken Porsche actually tests each car before it leaves the factory to ensure it has the correct amount of hp. Well, the premium you pay to get one should make a difference somewhere Hmm. It would be a bit f*cking pointless running it in then if they had it going full beans on a dyno prior to accumulating any mileage. it is pointless running in a new engine imho, as long as you wait until its up to working temperature before flooring it. But there are other components to a car too, like the gearbox, and most importantly, the driver, that also need running in Quote Link to comment Share on other sites More sharing options...
Baptist Posted November 18, 2006 Share Posted November 18, 2006 It is absolutely essential to run a new engine in, unlike gearboxes, engine require time to bed in, piston rings take time properly seat etc etc. Hence why mineral oil is used, to allow a certain amount of wear to occur, and the tolerences to properly set themselves. Dyno's are just a very approximate figure, the only way to get a proper engine figure is to run the motor on an engine dyno. Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 19, 2006 Author Share Posted November 19, 2006 It is absolutely essential to run a new engine in, unlike gearboxes, engine require time to bed in, piston rings take time properly seat etc etc.Hence why mineral oil is used, to allow a certain amount of wear to occur, and the tolerences to properly set themselves. Really depends on the manufacturer. Audi for instance delivers you a new car, and the first oil change only happens at 20.000 miles! And the car for sure isnt running on mineral oil those first 20.000 Quote Link to comment Share on other sites More sharing options...
StephenG Posted November 19, 2006 Share Posted November 19, 2006 If i m not mistaken Porsche actually tests each car before it leaves the factory to ensure it has the correct amount of hp. Well, the premium you pay to get one should make a difference somewhere Hmm. It would be a bit f*cking pointless running it in then if they had it going full beans on a dyno prior to accumulating any mileage. it is pointless running in a new engine imho, Remind me to never buy a 2nd hand car off you!!! Quote Link to comment Share on other sites More sharing options...
Baptist Posted November 19, 2006 Share Posted November 19, 2006 It is absolutely essential to run a new engine in, unlike gearboxes, engine require time to bed in, piston rings take time properly seat etc etc.Hence why mineral oil is used, to allow a certain amount of wear to occur, and the tolerences to properly set themselves. Really depends on the manufacturer. Audi for instance delivers you a new car, and the first oil change only happens at 20.000 miles! And the car for sure isnt running on mineral oil those first 20.000 What makes you think it wasnt done at the factory? Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 19, 2006 Author Share Posted November 19, 2006 It is absolutely essential to run a new engine in, unlike gearboxes, engine require time to bed in, piston rings take time properly seat etc etc.Hence why mineral oil is used, to allow a certain amount of wear to occur, and the tolerences to properly set themselves. Really depends on the manufacturer. Audi for instance delivers you a new car, and the first oil change only happens at 20.000 miles! And the car for sure isnt running on mineral oil those first 20.000 What makes you think it wasnt done at the factory? What makes you think it was? Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 19, 2006 Author Share Posted November 19, 2006 If i m not mistaken Porsche actually tests each car before it leaves the factory to ensure it has the correct amount of hp. Well, the premium you pay to get one should make a difference somewhere Hmm. It would be a bit f*cking pointless running it in then if they had it going full beans on a dyno prior to accumulating any mileage. it is pointless running in a new engine imho, Remind me to never buy a 2nd hand car off you!!! You wont, the steering wheel is on the wrong side Quote Link to comment Share on other sites More sharing options...
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