You really dont have to worry about lag on a 1JZ til you get into the 72+mm territory. Honestly a GT4067R is all around one of the best turbos ever made for street use
dont be another ebay turbo fool. You hear of those ppl saying they got a 60mm turbo, and blah blah tons of lag dont go BIG turbo. All a bunch of crap.
I run a precision turbo GT40-88 non BB... bone stock 1JZ except 550s and SAFC2. Im full boost by 4000rpms in 1st gear with a .86 exhaust...
Bolt on for easy 400whp 1JZ on 93 octane?
Remove twins (bolts off)
Install turbo manifold
Install oil lines
Install turbo (60 to 65mm NON EBAY kind)
Install FMIC and lines
Install JDM 440cc injectors
Wire in SAFC2.
Done. Enjoy 20-25mpg daily driving with the A/C on, and 400whp on...
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