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UTV's Off Road ( RZR, YXZ, Mini Buggy, Carts,etc.) => UTV Controls and Electrical => Topic started by: rashid7 on January 17, 2012, 11:30:05 AM

Title: Steering rack for piranha
Post by: rashid7 on January 17, 2012, 11:30:05 AM
Hi everyone....

I'm planning to order a 14" rack for my piranha buggy, you can check it from the link below

http://www.mooreparts.com/store/product/1256/AC425150/ (http://www.mooreparts.com/store/product/1256/AC425150/)

And tie rods

http://www.mooreparts.com/store/product/1247/AC425120/ (http://www.mooreparts.com/store/product/1247/AC425120/)

Any recommendations or other options better than this one ?

Thanks all
Title: Re: Steering rack for piranha
Post by: fabr on January 17, 2012, 04:31:36 PM
I want to ask if you have determined that rack will work with your front suspension design without creating bumpsteer?
Title: Re: Steering rack for piranha
Post by: fabr on January 17, 2012, 04:32:51 PM
I think Carl broke one like that also.
Title: Re: Steering rack for piranha
Post by: Carlriddle on January 17, 2012, 05:19:35 PM
Carl breaks lots of stuff.  rofl  Hopfully something new to break this spring.   ;D


 But Fabrs right, I was running an 11" and snaped the mount where the bolts hold it.  14" would be worse.  If the 14" rack is the correct width I'd put another $50 with it and get the "heavy duty" one listed just above or below that one on Moores site. 
Title: Re: Steering rack for piranha
Post by: ace on January 17, 2012, 11:50:51 PM
Doug Heim makes very good rack for the piranha, pm him..
Title: Re: Steering rack for piranha
Post by: Carlriddle on January 18, 2012, 07:41:08 AM
this would prob hold just fine http://www.mooreparts.com/store/product/1258/AC425152/
but as already stated if its not the correct width for your buggy its just a paper weight.  pick andmeasurment of front of buggy and we could give you the right answer.

and the tie rods are probably useless for your rail.  pickup "5/8 swedged alum rods" from speedway motors.  many different lengths threaded ends, 10-15 bucks.
Title: Re: Steering rack for piranha
Post by: rashid7 on January 20, 2012, 11:06:17 PM
I want to ask if you have determined that rack will work with your front suspension design without creating bumpsteer?

i'll be honest i dont know how to check that
 :(
how do i check the rigth width of the rack for me design to avoid bump steer?
Title: Re: Steering rack for piranha
Post by: rashid7 on January 20, 2012, 11:41:20 PM
this would prob hold just fine http://www.mooreparts.com/store/product/1258/AC425152/
but as already stated if its not the correct width for your buggy its just a paper weight.  pick andmeasurment of front of buggy and we could give you the right answer.

and the tie rods are probably useless for your rail.  pickup "5/8 swedged alum rods" from speedway motors.  many different lengths threaded ends, 10-15 bucks.

you mean these tie rods
http://www.speedwaymotors.com/Swedged-6061-Aluminum-Radius-Rod-for-5-8-Inch-Heim,53184.html (http://www.speedwaymotors.com/Swedged-6061-Aluminum-Radius-Rod-for-5-8-Inch-Heim,53184.html)
Title: Re: Steering rack for piranha
Post by: rob8420 on January 21, 2012, 06:25:26 AM
i'll be honest i dont know how to check that
 :(
how do i check the rigth width of the rack for me design to avoid bump steer?

If you are using the normal single a-arm design the length of the rack, point-point. Should be the same width as the pivot points of the a-arms.

Hope this helps

Robin
Title: Re: Steering rack for piranha
Post by: Carlriddle on January 21, 2012, 06:36:09 AM
Yes those are the tierods. 

Here is a basic drawing looking front front of car.  The rack should be the width of frame frome left side A-arm pivot to the right side A-arm pivot.
Hopfully this makes sense.  Are you building to plans?
Title: Re: Steering rack for piranha
Post by: fabr on January 21, 2012, 07:12:03 AM
Rashid,NOW is the time to do this part correctly. Follow Carl's advice. Also d a search here for bumpsteer. Lots has been written on the subject. One of the very most important things to the success ,and your happiness with the results of your build, is attention to this detail of assembly.
Title: Re: Steering rack for piranha
Post by: rashid7 on January 21, 2012, 07:59:27 AM
Yes those are the tierods. 

Here is a basic drawing looking front front of car.  The rack should be the width of frame frome left side A-arm pivot to the right side A-arm pivot.
Hopfully this makes sense.  Are you building to plans?

Yes Carl, but I have changed the design to double a arms instead of a single a arms
The distance between the left and right a arms pivots is 180mm which is about 7"
Do you thinks the 11" rack will work ?
Or should I increase the distance between the two a arms pivots?
Title: Re: Steering rack for piranha
Post by: rashid7 on January 21, 2012, 08:03:46 AM
Rashid,NOW is the time to do this part correctly. Follow Carl's advice. Also d a search here for bumpsteer. Lots has been written on the subject. One of the very most important things to the success ,and your happiness with the results of your build, is attention to this detail of assembly.

You are absolutely right fabr
And i'm so happy that you guys are helping me :)
thanks a lot
Title: Re: Steering rack for piranha
Post by: Baloo on January 21, 2012, 08:59:53 AM
Yes Carl, but I have changed the design to double a arms instead of a single a arms
The distance between the left and right a arms pivots is 180mm which is about 7"
Do you thinks the 11" rack will work ?
Or should I increase the distance between the two a arms pivots?

yes that would be the way l would go, the 2 need to match and finding a 7" rack might be tough
Title: Re: Steering rack for piranha
Post by: fabr on January 21, 2012, 10:14:25 AM
use a centerload rack and a rack adapter then.
Title: Re: Steering rack for piranha
Post by: Baloo on January 21, 2012, 10:50:27 AM
use a centerload rack and a rack adapter then.

whats a rack adapter then Master ?
Title: Re: Steering rack for piranha
Post by: fabr on January 21, 2012, 11:01:01 AM
Read this .   http://www.dtsfab.com/index/index.php?topic=1178.0  Sorry to just post a link but I'm really busy right now. The thread should answer most of your questions.
Title: Re: Steering rack for piranha
Post by: Carlriddle on January 21, 2012, 03:03:46 PM
Plus one on what Fabr said. Center load and rack spreader.  11" rack on a 7" center would need to push the steering arm pivots out by wheel out 2" ea side and that an't gonna happen.
Title: Re: Steering rack for piranha
Post by: rashid7 on January 23, 2012, 04:11:01 AM
use a centerload rack and a rack adapter then.
So master you suggest a centerload rack and I should design a rack adapter(length of it should equal the distance between the two a arms pivots)
What about the location of the rack, is it fine if I mounted it infront of the a arms? And there is any difference?
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