Can someone tell me more about the motor?? I read the turbo engines in the L20ETturbo did not come with any blow off valve. Could a blow off valve be installed to optimize performance?? They obviously run great without it but is there any drawbacks to not having one?? Does anyone know if these motors had a intercooler as well??
I also need some clarification. I heard Regular Unleaded in Japan is equivalent to US spec Premium Unleaded(around 91 Octane). If this were true, would cars imported from Japan need to be running 91 Octane fuel at the pump???
Can anyone fill me in?? Thanks.
Found this out from another forum
[quote name='Ghostrider' timestamp='1312595053' post='5952733']
Looks like a nice little pick up from the pics, well done!
The L20ET is very strong for it's design parameters, but remember the technology is 30+ years old. They can benefit enormously if allowed to breath better. If you can get yourself either an non intercooled FJ20ET turbo with the 0.63 rear housing (a direct replacement & no mods required) or an RB20DET turbo (more modern technology) & slightly larger injectors from an S130 280ZX Turbo (265cc) Z31 300ZX turbo (270cc) both hose tail connected & a direct replacement to your stockies and increase the boost marginally, (stay under a bar for some reliability) you will experience quite a bit of difference.
Factory spec on the L20ET is 104Kw at the flywheel & a loss of about 25% through the drivetrain is about normal, so 78Kw at the wheels is about you factory standard spec, yet with the few little mods I have suggested you could be looking at about 120Kw (about 160HP) at the wheels, which represents about a 50% improvement.
As you are in Canada, you should find the bits relatively easy to find, because the 280ZX Turbo that was very common in USA is the host of all the parts you need. The non intercooled FJ20ET Turbo was exactly the same as that fitted to the L28ET 280ZX Turbo and the injectors the same. Check ebay.com as you will find new and reco injectors often at great prices too.
Don't go overboard on injector sizing unless you're building a new & bigger engine such as L24, L26, or L28. Also remember your C210 is a front sump engine and all Zeds are rear sump engines so mods have to be done to change them to front. If you can find an L24E engine from 1984/85 Nissan Maxima from the US, that would be the perfect replacement as it is already front sump design & with an L26 or L28 crank & rods plus 1.0mm over bore you will have a great capacity to work with (2627cc) and then the sky is the limit and the big plus, to the untrained eye under the bonnet is going to look absolutely stock standard, yet you could have over 200Kw at the wheels.
Hope this helps,
Dennis from Ozland
Not sure about the octane question tho. I'll ask my contact in Japan. The motors came non-ontercooled tho