JWT ECU Question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

S14mc · 04-17-2009, 09:04 PM

I bought a "turbo kit" for my SR awhile back that came with a JWT ECU (on the ECU it states its a 63 with a JWT sticker stating 50# injs and Z32 maf).

Recently I swapped the turbo from an S15 to a GT2871r .64. For some reason my car seems to be much more hesitant in accelerating. I would boost normally (about 15psi now - before 17psi tops on the S15 ) but my car feels much slower. I understand the difference in the two turbos, but I would assume that 71r doesn't carry thaat much lag over the S15.

I guess my question is, do I need to get a retune since I changed my turbo? I thought that the ECU would compensate for the changes in air volume from the new turbo?

04-17-2009, 09:04 PM	#1
S14mc Leaky Injector Join Date: Dec 2002 Posts: 136 Trader Rating: (0) Feedback Score: 0 reviews	JWT ECU Question I bought a "turbo kit" for my SR awhile back that came with a JWT ECU (on the ECU it states its a 63 with a JWT sticker stating 50# injs and Z32 maf). Recently I swapped the turbo from an S15 to a GT2871r .64. For some reason my car seems to be much more hesitant in accelerating. I would boost normally (about 15psi now - before 17psi tops on the S15 ) but my car feels much slower. I understand the difference in the two turbos, but I would assume that 71r doesn't carry thaat much lag over the S15. I guess my question is, do I need to get a retune since I changed my turbo? I thought that the ECU would compensate for the changes in air volume from the new turbo?