Electric power steering, Need a measurement Options

[Randal]

222 isn't here at my house, so can't get the measurement I need.

What I'm looking for is the longest run on the steering colunm where you could install one of these inline devices:

http://electricpowersteering.net/index.php...586d61ffddb90af

Maybe there is enough room.

Thanks for the help.

[Chris Hamilton]

Thats an interesting idea! is that just the module from a Prius or other hybrid power steering with a metal plate bolted on or does the ECU have to be modified?

I think the best place to put that is the part of the steering shaft after the final U joint where it goes into the column. This would only work if you have relocated the fuel cell, but you've already done that on 222 right?

It might be easier just to use the entire rack from a car with electric power steering like this:
http://cgi.ebay.com/ebaymotors/HONDA-INSIG...s#ht_500wt_1155

[Randal]

Thats an interesting idea! is that just the module from a Prius or other hybrid power steering with a metal plate bolted on or does the ECU have to be modified?

Don't know yet Chris, but I've asked for specifications, including dimensions.

[byndbad914]

I've been considering an OEM rack swap as well but can say that for me I am finding a lot of the offset steering input racks like the Honda shown - I suspect one might have difficulty routing the steering down between the floor mount pedals, etc... even if you get the steering arm to go between two of the pedals, the angle may mean you get interference with your foot when you depress them. With my car right now I juuuuuust clip the steering rod here and there with the toe of my shoe when I hammer the throttle down. If I were going more directly down to an offset rack I would have interference for certain.

I can't see Randal's link as work is blocking that site, I will check that out later... sounds like some sort of inline item. If that is the case I will be really interested. The only one I found was really expensive, like $6K! I found a google link to Randal's site saying $995 in the content so curiosity is piqued.

edit - here is the one I saw, and yeah, $6K (IMG:style_emoticons/default/wacko.gif)
http://www.flamingriver.com/index.php/prod...8/s0001/FR40105

[J P Stein]

The Gen 2 MR2 steering rack (& electronic controls) may be cheep enough from a bone yard to see iff'n you can make it work.

[Randal]

I've been considering an OEM rack swap as well but can say that for me I am finding a lot of the offset steering input racks like the Honda shown - I suspect one might have difficulty routing the steering down between the floor mount pedals, etc... even if you get the steering arm to go between two of the pedals, the angle may mean you get interference with your foot when you depress them. With my car right now I juuuuuust clip the steering rod here and there with the toe of my shoe when I hammer the throttle down. If I were going more directly down to an offset rack I would have interference for certain.

I can't see Randal's link as work is blocking that site, I will check that out later... sounds like some sort of inline item. If that is the case I will be really interested. The only one I found was really expensive, like $6K! I found a google link to Randal's site saying $995 in the content so curiosity is piqued.

edit - here is the one I saw, and yeah, $6K (IMG:style_emoticons/default/wacko.gif)
http://www.flamingriver.com/index.php/prod...8/s0001/FR40105

It is an inline system. I'm going to call them Monday and ask for a detailed specification sheet and also pictures of a typical installation.

The price is $995.

Here is their contact information:

EPS Electric Power Steering Specialists
4504-A Candy Ln
Tyler Texas 75701
903-581-0008

[byndbad914]

they have a circle track one too that comes with some joints, etc for the same price, may try to find out if there is a difference, or if it is the same thing with mo' parts for the same money (always take mo' parts!)

http://electricpowersteering.net/index.php...586d61ffddb90af

I would ask:

1. if it has an adjustable boost level, or if it is constant, or variable (doubt that considering the price but adjustable boost would be good).

2. how many amps it draws - I have a pretty big alternator in my car so I might have capacity but a lot of racers use the smallest amp alternator they can to keep HP draw minimized.

At $1K I am definitely interested...

Oh yeah, the MR2 rack, I have considered that as well as another V8'er did a conversion on one of these forums but I haven't dug that deep as of late. The reduced scrub radius has helped me a bunch, but 10" slicks are still a PITA with a manual rack.

[Randal]

they have a circle track one too that comes with some joints, etc for the same price, may try to find out if there is a difference, or if it is the same thing with mo' parts for the same money (always take mo' parts!)

http://electricpowersteering.net/index.php...586d61ffddb90af

I would ask:

1. if it has an adjustable boost level, or if it is constant, or variable (doubt that considering the price but adjustable boost would be good).

2. how many amps it draws - I have a pretty big alternator in my car so I might have capacity but a lot of racers use the smallest amp alternator they can to keep HP draw minimized.

At $1K I am definitely interested...

Oh yeah, the MR2 rack, I have considered that as well as another V8'er did a conversion on one of these forums but I haven't dug that deep as of late. The reduced scrub radius has helped me a bunch, but 10" slicks are still a PITA with a manual rack.

I talked to the guy down in Texas and he is sending me the installation instructions which I can forward. (edit) I now have the instructions, showing the complete installation in a Polaris email me if you want a copy).

This unit just might work given that there isn't much more room in a Polaris than in a 914 and beefy part of the unit is perpendicular to the shaft.

He didn't know the amps it draws, but would check. I guess whatever sized alternator that they run on a Rhino would tell you something.
The unit is not adjustable.
He offered that the right way to buy the units is to look at various little 4 x 4's, like a Rhino, and pick which "kit" most likely fit your installation and then you get all the fittings and u-joints with the kit. He said there was a sale at $895 for some of these.

[byndbad914]

Wow, that is out of a Polaris! They said keep the car lighter than 2900 lbs but a Polaris will be way, way lighter than that, so I am now wondering just how sturdy that unit is with a car at 2800 lbs with driver (my setup), going thru a turn with massive slicks in the 100 mph range (IMG:style_emoticons/default/unsure.gif) Steering is one of those things I always take particular caution with as having the gears strip out in that unit and losing steering at 100mph mid corner would make for an exciting ride.

They do say they use it in circle track, so loading would be similar in terms of weight and grip, but I would be interested in actually seeing cars that have ran these - I haven't heard of it as most just run small, belt-driven power steering pump and the alternator tends to be small, often integrated into the water pump pulley, so electronics tend to be kept to a minimum.

edit - Randal, do you still have my personal email addy? I would be interested in checking out the instructions even tho' expect them to be really straight forward.

[Randal]

Wow, that is out of a Polaris! They said keep the car lighter than 2900 lbs but a Polaris will be way, way lighter than that, so I am now wondering just how sturdy that unit is with a car at 2800 lbs with driver (my setup), going thru a turn with massive slicks in the 100 mph range (IMG:style_emoticons/default/unsure.gif) Steering is one of those things I always take particular caution with as having the gears strip out in that unit and losing steering at 100mph mid corner would make for an exciting ride.

They do say they use it in circle track, so loading would be similar in terms of weight and grip, but I would be interested in actually seeing cars that have ran these - I haven't heard of it as most just run small, belt-driven power steering pump and the alternator tends to be small, often integrated into the water pump pulley, so electronics tend to be kept to a minimum.

edit - Randal, do you still have my personal email addy? I would be interested in checking out the instructions even tho' expect them to be really straight forward.

PM sent (IMG:style_emoticons/default/dry.gif)

[sean_v8_914]

1992-94 MR2 is Hydraulic with speed sens electric pump. fits in 914. pics died with my hard drive last year, sorry. pump with integrated resivoir fits fwd of tank mounted on bulkhead. 10 amp wiring straight to batt with power on relay. cut rack ends, machine tap for 911 turbo ends. fab holding bracket looked like an old Rod simpson v8 how he monted to stock eng bar w U bolts to the cross member. add hard stops welded to cross member
it fits

[sean_v8_914]

custom high presure lines go thru center of floor like renegade rad hose location.

[SirAndy]

power steering

If you have money to burn, Smart Racing makes a complete kit that fits the 914 ... (IMG:style_emoticons/default/shades.gif)

[DanT]

Ouch (IMG:style_emoticons/default/sad.gif)

[Chris Hamilton]

Dan you have a Prius right?

How do you like the electric power steering in it, do you think it feels like it would stand up to autocross/track use in a 914?

[byndbad914]

Randal - didn't get the PM, so dunno what happened with delivery but maybe try again.

Sean - thanks for the info, that is good to know. You mention cutting the rack ends and machining them, is the rack wider than the stock 914 rack? So that when you cut it down you cut it to a stock length to keep the tie rod mount location relative to the lower A arm for straight line bumpsteer stability? I am assuming you are cutting off a decent amount and removing all of the existing Toyota threading, correct?

I actually need to narrow the stock rack a bit now with my new dual A, but am asking this for personal edification as well as for anyone considering a stock 914 replacement.

oh yeah, and what is the pickup for the speed sensor for the sensitive steering input?

[Randal]

Randal - didn't get the PM, so dunno what happened with delivery but maybe try again.

Sean - thanks for the info, that is good to know. You mention cutting the rack ends and machining them, is the rack wider than the stock 914 rack? So that when you cut it down you cut it to a stock length to keep the tie rod mount location relative to the lower A arm for straight line bumpsteer stability? I am assuming you are cutting off a decent amount and removing all of the existing Toyota threading, correct?

I actually need to narrow the stock rack a bit now with my new dual A, but am asking this for personal edification as well as for anyone considering a stock 914 replacement.

oh yeah, and what is the pickup for the speed sensor for the sensitive steering input?

Ping me back your email address at randalbarrick@gmail.com

[sean_v8_914]

we ran it at constant on power. it uses a 0-5vdc from teh toyota ecu. with 12" meats it has good feel. others who are smarter and have more time can use the toyota power steering ecu with a summit racing digital speedo drive
I can measure the toyota rack later today

[byndbad914]

we ran it at constant on power. it uses a 0-5vdc from the toyota ecu.

So what did you use inline to reduce the 12V batt supply down to 5V? Just a simple inline converter? If so, what was the brand (no reason for me to reinvent the wheel if you have one that you have proven to work (IMG:style_emoticons/default/smile.gif) )

[sean_v8_914]

digi key 5v switching power supply 12vdc input 5vdc out @ 1.5A $28 back in 2001