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Re: Front Steer Rack Conversion - Part Deux
[Re: STEFF]
#1579508
03/06/14 11:00 AM
03/06/14 11:00 AM
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Joined: Jan 2003
Posts: 10,013
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,013
Frostbitefalls MN (Rocky&Bullw...
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The steering arm web is IMO way over kill
Good god, what are we talking, a couple ounces ?!?!? Hell, skip the fries at lunch !!!
As for the ackerman, zero is fine for straight line racing but the OP's application (as far as I know) and mine would be a street car and you do want some ackerman or you end up with significant scrub.
As far as the ackerman discussion, from everything I read, if you get the outer tie rod intersect outside the balljoint, you will have ackerman. Maybe not the exact optimimum position, because of space limitations ie: the wheel, but you do the best you can. On a side note, My rack is out 8 1/2" in front of the wheel. The outer tie rod connection is 7" in front. My mind escapes me how far out the tie rod connect point is outside of the ball joint. I'll have to look at my notes. Also, using my test arms, I played around with the outer connect location, in and out, up and down and settled on a position that got bumpsteer to within .030" over 6" travel.
Steff, You covered both ends of the project IMO, excelllent engineering and great looking finished product. I would be proud to put this deal on a show car.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Front Steer Rack Conversion - Part Deux
[Re: Stanton]
#1579511
03/10/14 08:44 AM
03/10/14 08:44 AM
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Joined: Jan 2003
Posts: 3,874
Smyrna, South Carolina
STEFF
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,874
Smyrna, South Carolina
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Quote:
Wow, those things hang out way in front of the rotor. What size are those rotors ??
Very nice. When I saw your cad drawings I thought they were going to be milled out of a chunk. But seeing how you've made them its something just about anyone could tackle without great expense. Very nice! And I think the extra gussets make sense.
Would you care to share the actual specs on those ??
Thanx!! Here's the info: From the center of the ball joint to the tie rod connection is 7", which is only a 1/2" further out from stock. The tie rod connection is also .625" outside of the ball joint. I had the gussets and base plates water jet cut from A-36 Hot Rolled Steel. Cost was $150 including material. Base Plate is 3/8" thick. Gusset is 3/4" thick. The Ball Joint Sleeves came from Speedway Motors. They were $7 each. I was able to have a friend at work machine the hole for the ball joint sleeve and tie rod tube in the main plate. The hole for the Ball Joint Sleeve was machined on a 7 1/2 degree angle to mimic the factory ball joint angle. The holes were machined to provide a slip fit for the BJ sleeve and tie rod tube. All parts were tig welded.
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Re: Front Steer Rack Conversion - Part Deux - UPDATE!!
[Re: STEFF]
#1579513
03/30/14 03:40 PM
03/30/14 03:40 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Cool  ... Steff.. whats the length of the steering arm from the C/L of the ball joint to the C/L of the tie rod end... whats the turning radius... I'm moving mine in about 1" and moving the rack back about 1 1/2" to get a better turning radius EDIT I see you put the length in... thanks... hows the turning radius 
Last edited by MR_P_BODY; 03/30/14 03:50 PM.
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Re: Front Steer Rack Conversion - Part Deux - UPDATE!!
[Re: MR_P_BODY]
#1579514
03/30/14 04:05 PM
03/30/14 04:05 PM
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Joined: Jan 2003
Posts: 3,874
Smyrna, South Carolina
STEFF
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,874
Smyrna, South Carolina
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Quote:
Cool ... Steff.. whats the length of the steering
arm from the C/L of the ball joint to the C/L of the
tie rod end... whats the turning radius... I'm moving
mine in about 1" and moving the rack back about 1 1/2"
to get a better turning radius
EDIT
I see you put the length in... thanks... hows the
turning radius
Turning radius isn't as tight as before but it isn't all that bad either. I have the Pinto rack, which has 4 turns lock to lock. Just need to be a little more aware when pulling in to tight areas. No hair pin turns.....LOL!
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