Plug-And-Play Wiring Harness:
Been meaning to update this thread for some of the recent wiring options:
The basic premise is that I have been doing some PNP harness conversions for people so that they can overcome one of the more difficult parts of the swap.
What you will need for a PNP harness:
1) The "Hybrid Racing" Universal Harness:
Hybrid Racing Universal Conversion Harness (K-Series ANY CHASSIS)
2) The stock Lotus ECU connector. This is available through Radiumauto.com, otherwise if it is for a 2006+ then I can order it for you and save a bunch of money. I think I get the connectors for like $40 whereas Radium gets around $100.
3) I need the 10 circuit Lotus "EHC" connector from the stock 2zz engine harness. I can send you a picture if you want to just send me the connector with a few inches of wire connected. Otherwise you can send me the whole stock Lotus 2zz engine harness and I'll cut it off.
4) The stock RSX-S (K20A2) engine harness. I use this simply to Tee in for the "No Charge" light on the dash. Additionally if you are wiring for AC operation then I need it for one more wire I believe. Otherwise if you don't want/need those features you can omit this harness.
If you choose to run the stock dash:
5) The Hondata dash converter:
Lotus Dash Converter
It comes with a little harness of its own which I can integrate in for you
If you decide to wire for AC:
6) The little Lotus AC compressor harness from the stock Lotus 2zz engine harness. Again I can take a picture of this connector for you, otherwise you can just ship me the whole thing and I'll cut it off.
- If you want AC then you will need to send me the RSX-S engine harness, as I noted in point #4 above.
*** Also want to point out here that I am supporting AC in the wiring. However at the moment there hasn't been a mechanical solution for the AC mounting bracket. Basically the stock Lotus AC compressor/lines are used but are bolted to the K-series. I believe Tim @ Innovative has been working on a bracket for this, but as of this writing there is no bracket yet. I personally suspect this is not that hard of a part to make someone just needs to do it ***
7) The charge harness you can do yourself as I outlined in my thread. I haven't been charging people to modify that, however I think I may start... as it just takes more of my time. It is definitely something you can do yourself, otherwise if you are uncomfortable then send me that as well.
What you get with a PNP harness:
- Harness with integrated fusing, and relay for main, switched 12v, and primary O2 sensor heater. No external relays/fusing needed. Integrated connector for primary O2 sensor.
- Fuel pump control (while retaining the stock multiplexor and inertia switch)
- ECU fan control
- Starter Button
- Reverse Lights
- Dash "No Charge" light
- (Assuming stock dash with Hondata converter) Stock dash functions which include RPM, VSS (includes now accurate speedo
), Oil pressure switch, MIL light, shift light, fuel level, water temp, etc.
- (If you run K-pro) OBD-II communications
- (If desired) AC control
- I can even send you a base startup map for K-pro if you would like
Basically the ECU (for the most part and in large thanks to K-pro) thinks its a very fast
K-series Honda, while the car thinks is a 2zz Lotus
I have been charging $350 + materials to create the harness... It takes me easily over 10 hours and I know what I am doing. So the wiring is definitely not a trivial task. In terms of materials it is usually about $50 and if you have me pickup the stock ECU connector (assuming you have a 2006+) then its another $40. Otherwise if you have a 2005 you will need to pick up the ECU connector from Radium which is ~$100, sorry I can't save you any money on that.
So most harnesses leave for between $400 and $450, in terms of payment to me.
The whole wiring breakdown is like this. (Assuming a 2006):
- Hybrid racing harness: $350
- My conversion to Lotus PNP: $450
- (Optional assuming using stock dash) Hondata dash converter: $300
My opinion on K-Pro versus Standalone:
The use of K-pro is a VERY smart idea! I personally LOVE K-pro and believe it is THE option for 95% of the people out there. Anyone that is a street car or needs OBD-II communications you will need K-Pro. Even most of the "race cars" will even likely want K-Pro. However you may consider a standalone if you really want a specific feature that is offered by a standalone (ethanol sensor integration, some complex external input/outputs, etc).
As for the dash its up to you. I personally like an OEM style swap so I wanted the stock dash. However some people like the AiM dash as it does provide for a pretty dash and some slick datalogging. Remember though the Hondata has built into it internal datalogging so a lot of the data you want can already be logged and downloaded from the K-pro and comes along as part of the swap.