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Originally Posted by dkim1985
excellent~ thanks~
few questions though.. do i need to use a radiator fit for KA24 or VQ35?
i know someone that can get me a good deal on a Koyo Radiator so do I get the one thats meant for the s13 KA24?
As for the ECU..is there a minimum requirement or specific ECU I need to use? I'm assuming I can't just grab an old 350z ECU and go with that, right?
I don't mind paying the money to get this done right. Just want to try to pass CA smog with the VQ swap..without going overboard on the parts.
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The KA radiator fits because it was built for that chassis. but the inlet and out let are both on the wrong side. If you want a stock looking radiator I think the B13 or B14 radiators have the correct inlet and out lets and are similar enough to fit. So if you use a KA radiator it will work fine, but you will need to route the hoses that may not look so pretty but it will work perfectly fine.
For the ECU the startup requirements look for the NATS/IPDM/BCM you can get that flashed out of the ecu while retaining emissions controls and smog-ability. But if you really want to make a smog legal s13 you need to read up on this build
#/f/chat/384013-plusoneten-build.html
he shows how he modified the s13 gas tank to be like the z33 one and used all the emissions equipment from it.
Infiniti G20 radiator will probably work better since the inlet and outlet size, and core thickness is larger than the sentra. Probably closer to the correct size for the vq anyways.