Re: will there b a new king?
Posted: Sat Apr 07, 2007 11:07 pm
Unfortunately my friend the soarer and the supra 1jzgte motors are indentical, the differences are subtle... the oil pan, and routing of the hotpipe for the intercooler. I they both run parallel twin CT12A ceramic turbos, supra weighs 1550kg and soarer weighs 1560kg. I wrote several articles on tuning these engines back in the early days of Onlydominican.
Very impressive for a 2.5-litre engine.
On paper, it appears that the Soarer twin-turbo motor almost equals the awesome 3.0-litre twin-turbo six in the RZ Supra - but it's nothing like that when you hit the road. You see, the Supra's engine has a 0.5-litre swept capacity advantage and it also relies on just one of its sequential twin-turbos to give a massive whack of boost (and therefore torque) at low rpm and load. The second turbo then comes on to maintain torque in mid-to-high rpm and load ranges. Put simply, this two-stage turbo system gives a tremendous dollop of torque everywhere in the rev range.
The Soarer - most unfortunately - doesn't have a sequential turbo set-up. The gasses exiting its 1JZ-GTE head are constantly divided into two simultaneously operating turbos; this means boost response and low-rpm torque are both a fair way behind the sequentially-turbo'd RZ Supra. You really notice this bottom-end 'hole' when punching the 1600kg Soarer off the line - it feels quite doughy until just before 3000 rpm. Even though it doesn't have the urgency of the Supra down low, however, the Soarer always remains beautifully tractable and smooth - signs of Toyota's extensive ECU mapping. On-boost torque builds progressively, though keep the throttle wide-open and it starts to die-off - while the engine also sounds a bit thrashy above about 6000 rpm.
Source (oh so reliable autospeed)
http://autospeed.drive.com.au/cms/A_118 ... larArticle
Very impressive for a 2.5-litre engine.
On paper, it appears that the Soarer twin-turbo motor almost equals the awesome 3.0-litre twin-turbo six in the RZ Supra - but it's nothing like that when you hit the road. You see, the Supra's engine has a 0.5-litre swept capacity advantage and it also relies on just one of its sequential twin-turbos to give a massive whack of boost (and therefore torque) at low rpm and load. The second turbo then comes on to maintain torque in mid-to-high rpm and load ranges. Put simply, this two-stage turbo system gives a tremendous dollop of torque everywhere in the rev range.
The Soarer - most unfortunately - doesn't have a sequential turbo set-up. The gasses exiting its 1JZ-GTE head are constantly divided into two simultaneously operating turbos; this means boost response and low-rpm torque are both a fair way behind the sequentially-turbo'd RZ Supra. You really notice this bottom-end 'hole' when punching the 1600kg Soarer off the line - it feels quite doughy until just before 3000 rpm. Even though it doesn't have the urgency of the Supra down low, however, the Soarer always remains beautifully tractable and smooth - signs of Toyota's extensive ECU mapping. On-boost torque builds progressively, though keep the throttle wide-open and it starts to die-off - while the engine also sounds a bit thrashy above about 6000 rpm.
Source (oh so reliable autospeed)
http://autospeed.drive.com.au/cms/A_118 ... larArticle
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