TurboSE Posted March 3, 2009 Share Posted March 3, 2009 I hope that made sense. I am getting ready to install my RB26 into a completely rewired drag car. It is not a Z-car (although, I don't think it's of any importance), it's a 240sx. Everything on the car has been rewired (ign, lights, fuel pumps, horn, etc) to operate on toggle switches and push buttons. I also plan to run a full set of aftermarket gauges. I understand this will require all new relays and fuse to replace those under the hood. I should be able to use the RB26 harnesses on their own, correct? I just need to be pointed in the right direction on how to get power to the ECU (and how to distribute it to the appropriate relays), how to hook up my various gauges. I have searched and will continue to search, but I just think it should be easier to start with a clean slate than to splice into an existing harness. Quote Link to comment Share on other sites More sharing options...
TurboSE Posted March 3, 2009 Author Share Posted March 3, 2009 I know this isn't 240sx forum, but this is by far the greatest braintrust of RB knowledge I have found on the net thus far, and everyone has been super helpful. PS- Maybe an easier way to grasp what I'm trying to do would be "how would you swap an RB26 into a dune buggy?" Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted March 3, 2009 Share Posted March 3, 2009 I'd offer you my advice but I'm no good with wiring.... It seems to me though, if guys can start up these motor sets on the ground, to test run them, it should be fairly easy to figure out which wires to use to power up the ECU etc. Be patient, some one here that knows should answer up when they see this.... Quote Link to comment Share on other sites More sharing options...
BirdmanZ Posted March 3, 2009 Share Posted March 3, 2009 Have you downloaded the FSM yet? You can use the wiring diagram in there to cut out the wires/connectors you wont be using and identify the wires needing constant 12V and switched 12V power. Brandon Quote Link to comment Share on other sites More sharing options...
dwarlick Posted March 3, 2009 Share Posted March 3, 2009 Have you read thru the Chris Rummel Sticky? You should be able to extrapolate the ignition and powering up the ECU from that. I got my RB26 started in a couple of hours by just following that sticky. I will say that some of the stuff is repeated so read it carefully but I think it should get you there. BTW I'm horrible with wiring and the FSM looked like gobbldie gook to me, so this might boil it down for you its only about eight wires and you're blowing smoke. Quote Link to comment Share on other sites More sharing options...
TurboSE Posted March 3, 2009 Author Share Posted March 3, 2009 Have you downloaded the FSM yet? You can use the wiring diagram in there to cut out the wires/connectors you wont be using and identify the wires needing constant 12V and switched 12V power. Brandon I dl'd the FSM, maybe my copy of it was't the best because everything is kinda blurry. Does anybody know of a good quality scan of the FSM? Quote Link to comment Share on other sites More sharing options...
z-ya Posted March 3, 2009 Share Posted March 3, 2009 You can do this using the FSM. I just did an R34 RB25 using only the FSM as a reference. Yes, you have to have some circuit sense. You also have to think about it for a while and draw a schematic. I created a schematic for the RB25DE R34 motor swap I am working on. It a completely separate circuit for the motor, leaving the 240Z harness in tact. PM me with your email address and I will send it to you if you want it. I appears that we can no longer have attachments to our posts..... I'll draw a similar schematic when I modify the RB harness for Roostmonkey's RB26DETT R32 swap I'm working on. Pete Quote Link to comment Share on other sites More sharing options...
mannyvig Posted March 4, 2009 Share Posted March 4, 2009 Don't forget the injector resistor pack, most of the time they wont come attached to the harness. But if you take direct switched power to the ecu and fuel pump everything else it in that harness. You will have to wire your own gauges of course. Quote Link to comment Share on other sites More sharing options...
BirdmanZ Posted March 4, 2009 Share Posted March 4, 2009 I have a good copy of the FSM if you want it. If you take your time you can figure it all out. Trust me, I'm not really electrically skilled but I managed to do it. Set aside a Saturday and concentrate on nothing but the harness. Double and triple check before you cut and you'll be ok. Mannyvig -Good point about the ballast resistor pack. I had to make my own as well. Brandon Quote Link to comment Share on other sites More sharing options...
TurboSE Posted March 5, 2009 Author Share Posted March 5, 2009 So, from what I have gathered so far: ECCS twins (green on the R32/RB26) get fused, constant power. Ign wire gets fused, key ON power. ECU back-up gets fused, constant power. Do I just splice into the corresponding wires coming out of the ECU and give them the appropriate power? Quote Link to comment Share on other sites More sharing options...
fast-datsun Posted March 8, 2009 Share Posted March 8, 2009 WE have been doing it 12 year, so you can put the motor in any car.. Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 15, 2010 Share Posted January 15, 2010 Here is the schematic I created for my R34 RB25DE Neo swap. It started right up last night. R34 ONLY! Quote Link to comment Share on other sites More sharing options...
RB-Z Posted January 15, 2010 Share Posted January 15, 2010 Yeah, using the FSM and a real and reputable wiring diagram, this will only take time and patience. Everything else is just connecting the dots... well... the wires. If I've learned one thing about swapping engines, they're all practically the same, you just need the right diagram to work off of. IMHO 85% of the swap is wiring everything together to make it work like OEM. Quote Link to comment Share on other sites More sharing options...
linluv84 Posted January 15, 2010 Share Posted January 15, 2010 Awesome work Z-ya! I especially like the fuses and relays you included. I'd rather pop a 25c fuse than fry an expensive ECU. Can't wait to put it to use Quote Link to comment Share on other sites More sharing options...
Wedge Posted January 15, 2010 Share Posted January 15, 2010 Cant wait to see the RB26 diagram from you Z-ya ! Quote Link to comment Share on other sites More sharing options...
Kash Posted January 15, 2010 Share Posted January 15, 2010 Z-ya, that's some excellent work...that diagram belongs in a sticky some where. Quote Link to comment Share on other sites More sharing options...
TurboSE Posted January 16, 2010 Author Share Posted January 16, 2010 Wow Z-Ya, absolutely amazing....love to see that RB26 diagram as well! Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 16, 2010 Share Posted January 16, 2010 When I do the same to an RB26DETT project I'm working on, I'll create the same kind of schematic and post it here. It will be for an R33. Pete Quote Link to comment Share on other sites More sharing options...
Wedge Posted January 16, 2010 Share Posted January 16, 2010 Nice ! Quote Link to comment Share on other sites More sharing options...
Wedge Posted March 8, 2010 Share Posted March 8, 2010 Updates Z-ya ? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.