Gentlemens Agreement

mk4respect · 10-23-2010, 11:38 PM

Ah yes, the gentlemen's agreement. Officially, no production car in Japan is supposed to be listed with more than 280 horsepower at the flywheel. I think the guys at Mazda probably got over the GT-R's stock power when they found out Nissan could pop on an optimized ECU and squeeze 360 out of the RB26DETT. They were more than happy with the stock computer then. :smoker2:

The JDM MKIV Supra TT was spec'ed at 280 hp. And it seems that it was actually limited to that. The U.S. Supra went 13.3 in the 1.4 mile, while the Japanese Supra came in at 14 flat, 7/10s of a second slower! An American-market car that's faster than its Japanese domestic cousin? Sounds crazy. The JDM Supra came with smaller injectors (430cc vs. 540) and a different final drive. So they didn't just "chip it" like many other manufacturers did.

The NSX at least used to conform to the 280 limit. I remember one dynoing at 270. Of course, who knows how much it puts out above redline. Redline is 8k, but the rev limiter doesn't kick in until 8300 (don't tell the owner I know this!). Remember, the numbers they give you in the U.S. don't necessarily reflect what they tell the people of Japan.

As far as I know, the agreement is still in effect. In fact, I believe it's law. Japan has always had some interesting laws concerning automotibiles, and many of these are responsible for the development of the high-tech, small-displacement motors we know and love. In other words, if it wasn't for weird regulations and subsidies, I might be cruising around in a pushrod 650ZX Twin Ram-Air. Ack, that sent a shiver down my spine...

http://www.automotivehelper.com/topic40821.htm

here ya go.

10-23-2010, 11:38 PM	#7
mk4respect Stock Join Date: Oct 2010 Location: Canada Posts: 2	Ah yes, the gentlemen's agreement. Officially, no production car in Japan is supposed to be listed with more than 280 horsepower at the flywheel. I think the guys at Mazda probably got over the GT-R's stock power when they found out Nissan could pop on an optimized ECU and squeeze 360 out of the RB26DETT. They were more than happy with the stock computer then. :smoker2: The JDM MKIV Supra TT was spec'ed at 280 hp. And it seems that it was actually limited to that. The U.S. Supra went 13.3 in the 1.4 mile, while the Japanese Supra came in at 14 flat, 7/10s of a second slower! An American-market car that's faster than its Japanese domestic cousin? Sounds crazy. The JDM Supra came with smaller injectors (430cc vs. 540) and a different final drive. So they didn't just "chip it" like many other manufacturers did. The NSX at least used to conform to the 280 limit. I remember one dynoing at 270. Of course, who knows how much it puts out above redline. Redline is 8k, but the rev limiter doesn't kick in until 8300 (don't tell the owner I know this!). Remember, the numbers they give you in the U.S. don't necessarily reflect what they tell the people of Japan. As far as I know, the agreement is still in effect. In fact, I believe it's law. Japan has always had some interesting laws concerning automotibiles, and many of these are responsible for the development of the high-tech, small-displacement motors we know and love. In other words, if it wasn't for weird regulations and subsidies, I might be cruising around in a pushrod 650ZX Twin Ram-Air. Ack, that sent a shiver down my spine... http://www.automotivehelper.com/topic40821.htm here ya go.