2002 spec parts
ohkay.. I think I want to correct some mistakes on this thread . I searched looking for some differences between a 99 motor , and the 93 motor . Just incase someone else searches and gets this as their first hit, I want to correct something .
It was stated that the power difference between 93 -> 99 spec engines was the ECU . and upping the boost . While this ECU bit is true , and I dont know about the boost. I do know the turbos are Different . on the 99 spec engines which have better response , and efficiency compared to the 93 spec turbos .
I also know they have the improved Y pipe, simplified vacume lines and a different thermostat housing hah .
but thats my limit so if anyone would like to elaborate on that it would be great .
i'm buying a 99 spec motor to replace my blown engine . and I'm wondering which parts to keep and which to sell .
I will be replacing the harness from my old motor onto the new motor . but what else was changed that Maybe I should keep?
It was stated that the power difference between 93 -> 99 spec engines was the ECU . and upping the boost . While this ECU bit is true , and I dont know about the boost. I do know the turbos are Different . on the 99 spec engines which have better response , and efficiency compared to the 93 spec turbos .
I also know they have the improved Y pipe, simplified vacume lines and a different thermostat housing hah .
but thats my limit so if anyone would like to elaborate on that it would be great .
i'm buying a 99 spec motor to replace my blown engine . and I'm wondering which parts to keep and which to sell .
I will be replacing the harness from my old motor onto the new motor . but what else was changed that Maybe I should keep?
There are 3 levels of 'JDM engine trim'.
280PS with Plastic insert turbos + improved materials
265PS
255PS
The 280PS spec turbos have a plastic insert which reduces the clearance between the compressor wheel and compressor housing. All this does is increase the peak compressor efficiency from 76% to 80%. That is the peak efficiency, they still blow hot air especially when boosted. And after 13 years surely the clearance has worn out to at least where the normal turbos would be the same anyway!
The 280PS turbos also have a different turbine wheel design which has greater fin to fin clearance and a taller turbine wheel and the inducer is 1mm smaller (increased trim ratio for same exducer size!). They make a bees dick more torque and power but that would all be in the ECU control system mapping anyway.
Other than that I believe the radiator fin design is different and the ECU mapping must be different. nearly everyone puts a thick 100% alloy koyo radiator in anyway so the radiator is a moot point.
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