Through the mid-to-late ‘90s, the JZ-series engine was treated to variable inlet cam timing (which Toyota calls VVT-i).
From 1996, the entry-level 2.5-litre 1JZ-GE received VVT-i as well as a compression ratio increase of 0.5:1. These changes helped achieve a very creditable 147kW and 255Nm (up 15kW and 20Nm from earlier models). These VVT-i 1JZ-GEs come fitted to the 1996 Chaser, Cresta, Crown and Mark II; they’re all autos.
Interestingly, the turbocharged 1JZ came in for a lot more than just VVT-i and a small compression ratio increase.
For the 1996 model year, the 1JZ-GTE lost its parallel twin-turbo system in favour of a large capacity single turbocharger. With a big CT20 turbocharger blowing through an air-to-air intercooler, the VVT-i 1JZ-GTE produces 206kW (as before) but with a massively improved 378Nm at 2400 rpm. It’s easy to dismiss the switch from twin turbos to a single turbo as a downgrade but back-to-back road tests show this to be a far better engine than previously.
The 1JZ VVT-i single turbo came fitted to the updated Soarer, Chaser, Cresta and Mark II of ’96. The same engine was then applied to the 1999 Crown and Crown Estate, 2001 Verossa and 2002 Mark II Wagon Blit. Most examples are fitted with an automatic transmission but there are manual versions to be found. These engines are quite scarce at the import wreckers but they’re an excellent package.
Source: http://www.autospeed.com/cms/A_2750/article.html
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