Peter10654 Posted November 18, 2005 Share Posted November 18, 2005 Hi Guys, Have anybody tested the rwhp for a standard supe? Jspec or Euro Spec ?? Flywheel HP Jspec 280 and UK 320 !! Thx Peter Quote Link to comment Share on other sites More sharing options...
UltraFlynn Posted November 18, 2005 Share Posted November 18, 2005 Jspec on paper is 280, but that just the published figure....... I reckon about 300 at the fly in standard form. Quote Link to comment Share on other sites More sharing options...
GeordieSteve Posted November 18, 2005 Share Posted November 18, 2005 So with 25% transmission loss that'd be..... Quote Link to comment Share on other sites More sharing options...
terribleturner Posted November 18, 2005 Share Posted November 18, 2005 Anyone got a tin opener for my can of worms?? Dug (Classone) put his stock J-Spec on the rollers at a meet and got 320. Quote Link to comment Share on other sites More sharing options...
Peter10654 Posted November 18, 2005 Author Share Posted November 18, 2005 So with 25% transmission loss that'd be..... 25% you think !! OK If anybody knows more...... PLEASE !! Anyone got a tin opener for my can of worms?? Dug (Classone) put his stock J-Spec on the rollers at a meet and got 320. 320 RWHP Or Flywheel ??? Thx a lot Peter Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted November 18, 2005 Share Posted November 18, 2005 25% you think !! OK If anybody knows more...... PLEASE !! Thx a lot Peter You are poking a hive full of angry bees there mate.....The UK vs Jap debate is always talked about.....best to do a search, as this has been discussed several times Quote Link to comment Share on other sites More sharing options...
Alex Posted November 18, 2005 Share Posted November 18, 2005 All stock manufacturers figures are at the flywheel via an engine dyno. I'd factor in an 8% trans loss on a Manual TT. Quote Link to comment Share on other sites More sharing options...
GeordieSteve Posted November 18, 2005 Share Posted November 18, 2005 25% you think !! OK Sorry mate I was being sarcastic... you'll see why in a few minutes and 300 replies I've sure lol Quote Link to comment Share on other sites More sharing options...
Lee P Posted November 18, 2005 Share Posted November 18, 2005 To work out RWHP on a rear wheel drive I was told to take off 12% - another 10bhp. This would make a jap supra 236 and a uk supra 271 at the wheels. Not sure if thats right. Dont forget that jap supras have about 314 lbft torque which is slightly more than the uk supra. Quote Link to comment Share on other sites More sharing options...
Ceptik Posted November 18, 2005 Share Posted November 18, 2005 Remember there was a big disbute over my figures? Mines a standard J-spec with CATs and everything and it read out 337.1bhp at the flywheel. Its an auto. Quote Link to comment Share on other sites More sharing options...
Lee P Posted November 18, 2005 Share Posted November 18, 2005 Whos Dyno was that on!! Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted November 18, 2005 Share Posted November 18, 2005 About 230-240 at the hubs is what I have seen at JAE on thors dyno. And as for 8% being total ground to flywheel losses well I'll call tosh on that. Mine dyno'd at 395 at the hubs and 369 at the wheels theres a 6.6% loss just through the wheel bearings and tyres. Circa 19% would be more like it. Quote Link to comment Share on other sites More sharing options...
Suprasteve Posted November 18, 2005 Share Posted November 18, 2005 Anyone got a tin opener for my can of worms?? Dug (Classone) put his stock J-Spec on the rollers at a meet and got 320. Mine standard come out 323 flywheel @ engine advantages in Witham, Essex. looking forward to at least 380 on the 4th which is how much RWHP .................? or shall i say somewhere between 300 - 350 depending on transmission loses !?!?!? Quote Link to comment Share on other sites More sharing options...
Jake Posted November 18, 2005 Share Posted November 18, 2005 Mines a standard J-spec with CATs and everything and it read out 337.1bhp at the flywheel. Its an auto. It didn't read anything at the flywheel. The flywheel figure was guessed at by making a calculation base upon the power measured at the wheels or hubs and an arbitrary percentage for drivetrain loss. Quote Link to comment Share on other sites More sharing options...
Jake Posted November 18, 2005 Share Posted November 18, 2005 Mine standard come out 323 flywheel @ engine advantages in Witham, Essex. looking forward to at least 380 on the 4th which is how much RWHP .................? Huh? You don't get the flywheel figure and work out the rwhp from that, it's the other way around. You say yours made 323 Flywheel but what did it really make, at the wheels? Quote Link to comment Share on other sites More sharing options...
Ceptik Posted November 18, 2005 Share Posted November 18, 2005 It didn't read anything at the flywheel. The flywheel figure was guessed at by making a calculation base upon the power measured at the wheels or hubs and an arbitrary percentage for drivetrain loss. Ok, well it was 337.1bhp. Whatever that means Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 18, 2005 Share Posted November 18, 2005 At least with 8% drivetrain losses no-one is ever gonna accuse me of overinflating my numbers -Ian Quote Link to comment Share on other sites More sharing options...
Suprasteve Posted November 18, 2005 Share Posted November 18, 2005 Huh? You don't get the flywheel figure and work out the rwhp from that, it's the other way around. You say yours made 323 Flywheel but what did it really make, at the wheels? not got a clue Jake, can't remember seeing it on the print out. I had this done when i first got the car a few years back when i had problems with the turbos. I'll try and dig out the print off and post it up. I understand that the dyno measures the RWHP and then supposedly works out transmission loses to calculate the flywheel figure i was just attempting to be funny but obviously not one of my strong points. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted November 18, 2005 Share Posted November 18, 2005 This is always a contentious issue lol. As far is it counts does any figure other than the one you are putting on the actual road count for anything? A performance gain at the wheels by reducing transmission losses will result in the same effect power wise at the wheels as a performance gain by the same amount of improvement at the engine. The only power you can use is the power you put on the road you can't use heat losses in the transmission for anything other than global warming Quote Link to comment Share on other sites More sharing options...
mikeyh Posted November 18, 2005 Share Posted November 18, 2005 Mine standard come out 323 flywheel @ engine advantages in Witham, Essex. looking forward to at least 380 on the 4th which is how much RWHP .................? or shall i say somewhere between 300 - 350 depending on transmission loses !?!?!? id be very carful about engine advantages mine come out with a very impressive 421 bhp only running 1bar,standard turbos,fully decated, fuel cut and blitz boost controller when looking at the graphs it was only 313bhp at the wheels im not saying they are liers just a little genorous maybe to keep customers happy;) Quote Link to comment Share on other sites More sharing options...
Peter10654 Posted November 18, 2005 Author Share Posted November 18, 2005 Thx for your answers !! Peter Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted November 18, 2005 Share Posted November 18, 2005 I got mine done when standard, and it put out 265 RWHP estimated ~ 323bhp. This was done on a decent rolling road. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted November 18, 2005 Share Posted November 18, 2005 See they've given you 18% there for losses which is about right don't ya think? Alot dyno around the 230-240 marker which puts them in the 280-290 bhp area with similar loss figures. Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted November 18, 2005 Share Posted November 18, 2005 This was on a decent rolling road (not hub dyno) that can measure up to 1800bhp. Its pretty good. But he was saying 18% for manuals. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted November 18, 2005 Share Posted November 18, 2005 What exactly is wrong with a hub dyno? OK its not getting the readout on the road but its as close to the engine as you can get without taking the engine out and strapping into its own dyno. It doesn't give you the on the road power though so it is a bit of a halfway figure. Quote Link to comment Share on other sites More sharing options...
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