I'm thinking about upgrading my 86 300ZX ECU with on from JWT. Anyone done this to there Z? I think I will be ordering it next week.

STEVEZCAR "The Zman"

 

If you have the cash upgrade your injectors as well, donno if they have options for NA cars, but definately could make a large difference on a turbo car with a front mount intercooler. Their pop charger (or K&N intake) would help greatly along with a high quality exhaust system.
Ask them what other things you should have done to your car before the upgraded ECU will help. Let us know how well your car performs after.

`72/`73 240Z
`81 280ZX GL
`85 300ZX Turbo
`87 Toyota Supra Turbo
`95 Mitsu 3000GT