Aerotop Dave Posted May 11, 2005 Share Posted May 11, 2005 It hasn't. The big three Japanese car manufacturers (Nissan, Honda and Toyota) came to a gentlemen's agreement to limit the power of their cars to 280bhp. This helped avoid a costly development race to design and develop ever more powerful cars. You'll find quite a few big Japanese sports cars are quoted as having 280bhp, but in reality the manufacturers simply lied about the power figures, and Toyota were no exception. The import Supra has essentially the same power output as the UK car, around 326bhp. Perfectly stock J spec Supras have been dynoed at this figure with no modifications at all, so you can assume that the two cars are identical in power output. However, since no two engines are alike, the word 'identical' shouldn't be taken literally - expect your engine to be somewhere in the 310 to 330 power range. But you won't be at a power disadvantage if you choose the import Supra over the UK version. searchflags: 280, bhp, import, uk, j-spec, j spec, jdm, jap, japanese Link to comment Share on other sites More sharing options...
Guest KARacing Posted May 28, 2005 Share Posted May 28, 2005 No more this agreement from this year of 2005 now. Which is good for us Link to comment Share on other sites More sharing options...
steady_eddie Posted July 3, 2005 Share Posted July 3, 2005 didnt the j-spec have diff injectors? Link to comment Share on other sites More sharing options...
ScuttleRX Posted July 3, 2005 Share Posted July 3, 2005 Ive heard that j-specs have a slightly smaller set of turbos to uk specs, any truth in this? Link to comment Share on other sites More sharing options...
MrAngry Posted July 3, 2005 Share Posted July 3, 2005 Ive heard that j-specs have a slightly smaller set of turbos to uk specs, any truth in this? No There was a post that Branners had put up somewhere showing the J-Spec and UK turbos side by side.. The Japanese ones are bigger Link to comment Share on other sites More sharing options...
JohnA Posted July 4, 2005 Share Posted July 4, 2005 It's more complicated than that. Yes, the Jap turbine has larger diameter (since it weighs less) but the relationships to the housings are different, with the UK creating at low revs a bit less backpressure (and boost) overall See the table here from an unfinished page of my site Link to comment Share on other sites More sharing options...
ScuttleRX Posted July 4, 2005 Share Posted July 4, 2005 Thats interesting, I ask because my friend with a j-spec has been under the impression that j-specs are smaller, think the info was from Jap Performance or similar :rolleyes So what was the reason for the j's being ceramic and uk's steel? Link to comment Share on other sites More sharing options...
Alex Posted July 4, 2005 Share Posted July 4, 2005 The jap cars were limited to 112mph, so speed to spool was more important that outright power. UK and Euro spec's were limited to 155mph and they had Autobahn's they could use the extra power on, and need the strength of the steel wheels. Link to comment Share on other sites More sharing options...
JohnA Posted July 4, 2005 Share Posted July 4, 2005 ... the impression that j-specs are smaller, think the info was from Jap Performance or similar :rolleyes I've got magazine articles referring to 'small' and 'large' turbos in the sequential (when in reality both are the same) mags are not always accurate mate, sometimes they even propagate hearsay and myths, much like the internet... Link to comment Share on other sites More sharing options...
neo1 Posted July 4, 2005 Share Posted July 4, 2005 One magazine thinks a stock GT4 180 (G-reg shape) can do 0-62 in 4.5 seconds !!!! Interesting, very interesting. Link to comment Share on other sites More sharing options...
steady_eddie Posted July 4, 2005 Share Posted July 4, 2005 hahaha yeah right ill beleive that when i see it Link to comment Share on other sites More sharing options...
ScuttleRX Posted July 4, 2005 Share Posted July 4, 2005 sometimes they even propagate hearsay and myths, much like the internet... lol cheers for info chaps 4.5 seconds hey, not bad, did they mention how big the slope was on the hill they were testing it on? Link to comment Share on other sites More sharing options...
steady_eddie Posted July 4, 2005 Share Posted July 4, 2005 lol cheers for info chaps 4.5 seconds hey, not bad, did they mention how big the slope was on the hill they were testing it on? was pushed over the grand canyon but still only made 4.8 so they had to weigh it down with some illegal imigrants Link to comment Share on other sites More sharing options...
neo1 Posted July 4, 2005 Share Posted July 4, 2005 One magazine thinks a stock GT4 180 (G-reg shape) can do 0-62 in 4.5 seconds !!!! Interesting, very interesting. Think it was off beachy head with a NASA rocket strapped to its rear bumper Link to comment Share on other sites More sharing options...
Jspec Germany Posted July 4, 2005 Share Posted July 4, 2005 didnt the j-spec have diff injectors? Yes, injectors are smaller on a jspec. As mentioned before though, both cars bone stock will produce very similar peak horsepower on the dyno, although I've read that the Jspec has a slight advantage when it comes to torque. Link to comment Share on other sites More sharing options...
JohnA Posted July 4, 2005 Share Posted July 4, 2005 ... I've read that the Jspec has a slight advantage when it comes to torque. it does -- in stock trim it produces a few more lbft and it starts building torque at lower revs too. Of course that's not the whole story though, at prolonged full throttle the UK spec runs cooler and has the advantage. The setups are geared around slightly different expected usage. Link to comment Share on other sites More sharing options...
Paul Posted July 4, 2005 Share Posted July 4, 2005 What's this, a post to increase the price of j-specs Who gives a sh*t, they're all nice.................just that UK's a nicerer Paul Link to comment Share on other sites More sharing options...
si wants supra Posted October 5, 2005 Share Posted October 5, 2005 now i have heard the j spec had a bit more poke about them than the UK read it some where on here i might be wrong and slightly biest since iam a j spec owner they look the same when their new out of the box though Link to comment Share on other sites More sharing options...
Jspec Germany Posted October 5, 2005 Share Posted October 5, 2005 Bone stock, Jspec is a little bit quicker, but UK/US is faster if that makes sense. Once you start modding, it varies. Ultimately though, the UK/US spec cars are built stronger (fueling, brakes, cooling) and will support more safe HPs. If looks matter to you, than as a jspec owner you probably hate the -@ss hood scoop on the UK car. Not that I see anything wrong with being Which one is better? Depends on you. Link to comment Share on other sites More sharing options...
JohnA Posted October 5, 2005 Share Posted October 5, 2005 If looks matter to you, than as a jspec owner you probably hate the -@ss hood scoop on the UK car. Not that I see anything wrong with being . Perhaps that's why it's got the two dildoes sticking out, to counteract the gheyness of the scoop Link to comment Share on other sites More sharing options...
Jspec Germany Posted October 5, 2005 Share Posted October 5, 2005 Or advertising? Link to comment Share on other sites More sharing options...
JohnA Posted October 5, 2005 Share Posted October 5, 2005 It appeals to both sexes, he he... Women, too Link to comment Share on other sites More sharing options...
Guest TT Aero Posted October 9, 2005 Share Posted October 9, 2005 Deleted sorry wrong list Link to comment Share on other sites More sharing options...
Markie Posted October 9, 2005 Share Posted October 9, 2005 J-Spec also have the ceramic blades, therefore giving it faster spooling appaently.. I would choose J-Spec all the time.. I mean, who makes the best cars? US? UK? Japan? J-Spec must mean they gave us all the best ideas and engineering, and then gave all the crap to the US and UK spec ones Link to comment Share on other sites More sharing options...
Aerotop Dave Posted October 9, 2005 Author Share Posted October 9, 2005 This thread really needs pruning big time. Link to comment Share on other sites More sharing options...
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