- Joined
- 30 December 2002
- Messages
- 232
I figure I start this thread because if I don’t I’ll not get around to do this. Let me start that there is nothing wrong with manual steering rack its works well but EPS is friendlier to older guys like me. If you ask me 18 years ago I would laugh at it but as I got older I sway more towards the EPS. I wanted to upgrade but the oem nsx EPS is overpriced and as it was top of the line back in the day, the new designs in other models are simpler more stable and do the job much better for much less. Tires/wheels, size of steering wheel and road will all impact how much force you need to turn it. In my setup I need 14lb to turn my steering wheel. S2000 should be around 7lb.
Did some research and S2000 steering rack sounds like perfect fit as honda designers had performance in mind when working on it. Insight or accord might work but I don’t think it will have same feedback and TL went can bus so would need bcm to get it working. S2000 speaks in simplicity, it only needs rpm and vehicle speed signal. It does not need steering angle from slip ring or vss signal before ecu. It only has two inputs, there is one output that I don’t think will be needed but I might connect it to a/c, this is for idle speed to raise rpm’s while not moving.
EPS control module can be removed from any S2000, even right hand, they are all the same range $80-300. The steering racks are easily available and range $200-400. Connector pig tails usually are $5-15 each and need 5 of them. The rack itself will need fabrication to make it fit, not too much space under those coolant hoses. If it all works it would be awesome, if not it will make a cool looking night light post, lol.
Different s2000 steering racks available:
This is def not for everyone and I’m just sharing my progress, but I like to tinker with cars so it's up my alley. I don’t think anyone done this on nsx yet. It’s been done on ITR and legend, but not nsx. I’m going with AP2, because I got it the cheapest around me. But from what I hear from s2000 guys ap1 or CR is better.
Looking at this should not be that bad to fabricate. Instead of making adapter brackets maybe I’ll try to fabricate new support beam that s2000 steering rack will just bolt on to it, and be fully reversible. The s2000 rack mounts and steering shaft have different angles then nsx so it will take me few attempts to get it right I’m sure. Steering joint is also thicker and have more teeth on it, so it will need steering join from s2000 mated to nsx one.
Did some research and S2000 steering rack sounds like perfect fit as honda designers had performance in mind when working on it. Insight or accord might work but I don’t think it will have same feedback and TL went can bus so would need bcm to get it working. S2000 speaks in simplicity, it only needs rpm and vehicle speed signal. It does not need steering angle from slip ring or vss signal before ecu. It only has two inputs, there is one output that I don’t think will be needed but I might connect it to a/c, this is for idle speed to raise rpm’s while not moving.
EPS control module can be removed from any S2000, even right hand, they are all the same range $80-300. The steering racks are easily available and range $200-400. Connector pig tails usually are $5-15 each and need 5 of them. The rack itself will need fabrication to make it fit, not too much space under those coolant hoses. If it all works it would be awesome, if not it will make a cool looking night light post, lol.
Different s2000 steering racks available:
- JDM Type V Japan included variable gear ratio steering (VGS), a steering system that continuously changes steering ratio based upon vehicle speed and steering angle to provide improved handling. The lock-to-lock steering ratio was reduced to 1.4-wheel turns. It requires VGS computer/module in addition etc..
- 2000-2002 AP1 Steering ratio 13.8:1 lock-to-lock 2.4-wheel turns
- 2004-2009 AP2 Steering ratio 14.9:1 lock-to-lock 2.6-wheel turns (system features an optimized steer response gain, while the software was updated to improve steering linearity and agility)
- 2008-2009 CR Steering ratio 13.8:1 lock-to-lock 2.4-wheel turns
This is def not for everyone and I’m just sharing my progress, but I like to tinker with cars so it's up my alley. I don’t think anyone done this on nsx yet. It’s been done on ITR and legend, but not nsx. I’m going with AP2, because I got it the cheapest around me. But from what I hear from s2000 guys ap1 or CR is better.
Looking at this should not be that bad to fabricate. Instead of making adapter brackets maybe I’ll try to fabricate new support beam that s2000 steering rack will just bolt on to it, and be fully reversible. The s2000 rack mounts and steering shaft have different angles then nsx so it will take me few attempts to get it right I’m sure. Steering joint is also thicker and have more teeth on it, so it will need steering join from s2000 mated to nsx one.
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It's very close I have everything disassembled now but will definitely pay close attention to that. I'm not there yet but it might need some alteration. I'll have to check the steering wheel is straight and do wheel alignment after all is done. I have the support beam out to allow adjustment in all directions. When I get there need to test fit with car on the ground and measure lock to lock clearances too. Fabricating support beam gives the freedom of adjustment and making this right. Giving myself 2-3 months to finish this project.
