why aren't you using the F20 motor/tranny??

and why are you converting to EPS

 

not using the f20 because i want to use another motor, keeping with the vintige look, but modern technology.

want the EPS to replace my steering box and pitman arm. the EPS is the best choice i have found for a simple power steering system.

Ryan

 

what motor are you planning on putting in there??


I haven't seen anyone swap a different motor into an S2K... ever.

 

No guys, i am so sorry. the rack is going into a different car, a '76 celica, using 18rgeu. the rack is going into this car. sorry guys, i should have made that more clear. my appologies.

anyone have any thoughts?

Ryan

 

:confused i'm still lost....tell us the long version because i'm not understanding

 

I Think he wants to transplant the electronic steering rack from an s2000 to another car that is not an S2000.

BTW, why do you want to do this ?

 

hmm... alright, so basically you're trying to put the S2000 power steering components into a '76 celica that came without power steering, correct?

to be honest man, you're probably better off going with a standard rack and pinion power steering setup from a simpler car... like maybe an accord or something. One that's not completely electronically controlled.

The S2K EPS might be the easiest to install (because it's mostly electrical stuff), but it's probably going to be the hardest to make work because of that. Unless you switch to an S2K computer setup to run your 76 celica, then there's a good chance it won't work... and we all know the S2K computer wouldn't really run your celica's engine that well.

A lot of the things you're talking about aren't as simple as say, the 02 resistor trick for using test pipes... all of those things are variable resistance values, and they rely on near exact measurements of engine speed, engine load, vehicle speed, available power, amongst a number of other things. Trying to "fool" a system such as that into working properly without even one of these factors is near impossible... if you're trying to make it work with two or three missing, well good luck on that.

I'd say stick with something mechanical rather than electrical. Newer cars have way too much computer technology in them to be easily transferred to an older car (like your '76) without a lot of modification and new computer based management. Find yourself a mechanical-type power steering assembly, and custom fab that to work with your celica. Make brackets, get different sized belts... get good with cutting and welding...

 

:stupid totally agree

get good with cutting and welding...

lol, thats for sure

 

thats what i was trying to figure out, what exactly the EPS computer uses from the ECM to operate. if it were something simple like just a 2 mode signal, I/O, i could probibly simulate that. but as your saying, the signals are much more complicated than that, and apparentlymore numerious too.

can anyone else confirm what the signals fromt he ECM to the EPS computer consist of?

the fitting and instilation is not a problem for me, its the electronics to make it work right that i am trying to get info on, cause if i had that info, i can make it work.

Ryan

 

i'm trying to find S2K service info... if I can manage to find it I'll let you know, but it's looking pretty grim that I'll find it...

but yeah, the electronic system would definitely be easier to install, but because you'd have to simulate so many electronic signals, it'd be tough to get working.

 

go into the service info thread I made and download the S2K service info... that has all the information on the EPS that you can use to see if you can make it work...

it's chapter 17 section 15


basically, it uses these sensors:

VSP - Vehicle Speed Pulse sensor
torque sensor
NEP - engine pulse sensor (detects engine speed, rpm)
PS-SIG - power steering signal

amongst those, there's various power/ground/voltage fade wires to connect as well, just to get the computer to work... that has nothing to do with actually applying the power steering mechanically...

 

SO THATS WHAT THOSE ABREVIATIONS MEANT!!!! i knew it was important, just couldnt figure it out.

ok, so they are pulse sensors, i can probibly figure out a way to simulate those, if i can get the peramiters of the pulse(voltage, frequency, amperage). (i am a mechanical engineering student, so i have access to alll this stuff, and plenty of smart people to help me figure it out.

the load signal though is going to be a HUGE bugger.

WLP is an indicator light signal?

i am thinking that i can get it to do a 2 mode setup. by that i mean, power assisted for parking lots, and off for say anything over 15mph. that is if i can get the load signal figured out.

do you have any technical data on what the load sensor signal looks like?

thanks for the help, i think i am well on my way now to figuring it out. just a little more info and i whould be able to get this thing going.

Ryan

 

keep us updated on your progress.


all the information you need should be in the link Boski provided in that other thread... service info

 

will do. it might be some time before i can get anything really going on this, but we will see. i'll keep this thread on my bookmark so i can update it when i do have anything to add.

THANKS FOR THE HELP!

Ryan