December 15, 2019, 04:31:31 PM

Author Topic: Adjustable bumpsteer kit - FD tie rod end taper size?  (Read 5692 times)

Offline gnx7

'93 FD: 441ci/AllPro LS7 heads/intake en route, T56 Mag, 8.8" IRS, HolleyHP, DavisTechTC 10.32@137mph cats/full exhaust. 165mph 1/2 mile (old LS7)
'93 FD LS9 turbo, T56 Mag, Samberg 8.8" solid axle, 9.35@163mph 197mph 1/2 mile
`69 Chevelle: alum 5.3, GTS76 turbo, ChiseledPerf A/W, T56 Magnum,Ford 35 spline 9".CTS-V interior http://www.norotors.com/index.php?topic=18234.0
old yellar....440rwhp/FD sold but not forgotten: http://www.ponycars.net/scc.htm
I sell new T56 Magnums/McLeod clutch/T56 rebuild kits/Holley EFI/FIC injectors and all BrianTooleyRacing parts.  norcalmotorsport@gmail.com

Offline Cryptic

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #31 on: May 17, 2019, 11:45:38 AM »
Justin Samberg was kind enough to confirm its a 5/8 bore with 5/8-18 female thread. Pretty standard stuff.

Pick your poison.
https://www.speedwaymotors.com/shop/heim-joints-and-rod-ends~14-16-578-31189?facet=l_thread_type:133*l_thread_pitch:8978*l_thread_type:135
1995 427 LS3 Burnout Widebody FD
My build thread
2011 Ford F250 CCSB 6.7L

Offline carlb

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #32 on: May 20, 2019, 09:30:54 PM »
Copying from my facebook thread I started:

I was driving back from the Tail of the Dragon to my hotel and it started to rain hard (again). The kind of rain where you can barely see anything. I slowed her down and I noticed the car was darting all over the place. I wasn't sure at the time if it was the rain or the damn alignment slipped again. Luckily, I was on my way to the enclosed trailer to pack her up to home anyway.

I have been chasing a problem on the RX-7 for the last 5 years. The car has always felt a little unsettled on our craptastic WI roads. The alignment has been bumped or forced out of alignment on at least 3 occasions. I believe it happened again at the Tail of the Dragon. That could have resulted in bad things if it slipped anymore than it did.

I found one end link stud (Samberg) was actually BENT and one of the caster/camber bolts slipped out of position. (I took pics of them after my 3rd trip to the alignment shop) Also carved out a piece of steel to brace any alignment slipping and tacked it into place.

Replaced both end link studs, tested for bump steer, and did an old school alignment. (I'm actually getting good at this now LOL)

Took the car for a test drive and it has NEVER felt so planted and sure-footed over crappy roads. I have actually changed tire sizes (taller sidewall) because of this issue. I questioned my coilovers being too stiff. Nope! Just incorrectly corrected bump steer.


Adjustable Pinto Tie-Rod Adapter Stud to Heim: https://www.speedwaymotors.com/Adjustable-Tie-Rod-Adapter-Stud-to-Heim,3333.html?sku=91636055-PINTO

Cone Spacers: https://www.speedwaymotors.com/Steel-Cone-Spacers-for-Rod-Ends-5-8-Inch,32702.html



Wow! This is news I can use. Thanks. I'll be ordering a set now and trying this out.

Offline ducat

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #33 on: September 30, 2019, 10:12:29 AM »
Justin Samberg was kind enough to confirm its a 5/8 bore with 5/8-18 female thread. Pretty standard stuff.

Pick your poison.
https://www.speedwaymotors.com/shop/heim-joints-and-rod-ends~14-16-578-31189?facet=l_thread_type:133*l_thread_pitch:8978*l_thread_type:135

Yes, but what's the mechanism to thread the m12 tie rod onto the 5/8 -18 rod end?
Pretty sure that I am going to further thread the inner tie rod, and then machine a female adapter with m12x1.25 on one end, and 5/8 18 on the other. May need to cut down the inner tie rod for enough adjustment.
Unless there is a better solution that I am unaware of...

Offline spacevomit

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #34 on: September 30, 2019, 11:09:14 AM »
When you buy the Samberg tie rod ends he provides 5/18-18 to 12mm adapters.

Offline ducat

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #35 on: September 30, 2019, 04:22:06 PM »
Well I have the "old" Hinson adapters, I guess.
They used to weld a tube to the end of a cut off rod end. It was a shitty solution. Though, I must say- it has not broken or shown signs of breaking in 12 years.

He must have switched to a machined solution....
I do not have this adapter.

Offline Cryptic

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #36 on: November 24, 2019, 06:25:34 PM »
Long overdue update. Finally got around to editing.

1995 427 LS3 Burnout Widebody FD
My build thread
2011 Ford F250 CCSB 6.7L

Offline Cobranut

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #37 on: November 24, 2019, 08:51:36 PM »
With that much variation side to side, I'd check your rack to be sure it's level.
There could also be a difference in the effective lengths of your tie rods, ie: the rack isn't centered.
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline wickedrx7

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #38 on: November 25, 2019, 12:06:15 PM »
Great video! My only question is did you lock the steering wheel when you performed the tests. Maybe you said you did in the video and I missed it.


1993 Touring, 2012 L99, T-56, Ronnin 8.8, Ohlins, Speedhut, Samberg and lots of custom parts
Build Thread - http://www.norotors.com/index.php?topic=19354.0
Pictures - www.flikr.com/wickedrx7

Offline Exidous

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #39 on: November 25, 2019, 06:19:20 PM »
I'm partial to the wood block, level and laser pointer method. I'm cheap and like visuals. Ha
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Not too loud with the new resonators!

Offline kinger

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #40 on: November 27, 2019, 03:01:00 PM »
That was a sweet video!  That had to take you HOURS.  You are spot on with you 2nd hand comment.  I have my car 2nd hand and had trouble understanding why this was a issue when Samberg had a kit.  Strange its different side to side.  That longacre is a sweet tool.  Funny to see how SMALL of a shim makes such a difference.  I would love to measure mine now just to see how it compares to your measurements. 

Thanks for the taking the time!  I also like your forum comment at the end!  I LOATH FB groups for car stuff like this.  The forums are superior in every way.  Wish you could make a post on a forum and it would post it to FB group but then a response on the FB group was linked BACK to the forum somehow as a record.  Just to take advantage of the convenience of seeing it in your feed and ease of responding but keep that searchable feature in the forums that saves my butt a LOT!
93 Touring, 6.3L, T56 Magnum, Mamo RPS BC2 clutch, FAST 90, NW 90TB TB, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline Exidous

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #41 on: November 28, 2019, 04:06:44 PM »
https://youtu.be/X3DTTL9xRQ0

Check the end of the video. Pretty good explanation for the best channel on YouTube.
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Not too loud with the new resonators!

Offline Cryptic

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #42 on: November 29, 2019, 04:58:22 PM »
https://youtu.be/X3DTTL9xRQ0

Check the end of the video. Pretty good explanation for the best channel on YouTube.

That's the video that gave me the idea for the Lazer on the rotor. It got me within .030", but without measuring with the longacre, I would have never known how close I really was.
1995 427 LS3 Burnout Widebody FD
My build thread
2011 Ford F250 CCSB 6.7L

Offline petawabit

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #43 on: December 04, 2019, 01:03:23 PM »
Has anyone tried helicoil'ing a 5/8 female rod end with the M12 x 1.25 thread of the steering rack male side?  Having a touch time finding adapters between the 5/8 rod end and FD steering rack

Offline shainiac

Re: Adjustable bumpsteer kit - FD tie rod end taper size?
« Reply #44 on: December 04, 2019, 01:12:49 PM »
Later model Mustangs (05-10) bump steer kits use M14x1.5 > 5/8"-18 turn buckles for heim joints. I'm not familiar with what threads are on the rack of the FD, but you could probably find another inner tie rod that has FD rack threads and M14 outer threads. Moog's website has a nice search feature to narrow down applications that have the specs you need.
For my FC, I ended up using a BMW E21 inner tie rod and a Steeda Mustang bumpsteer kit. It was easier than I expected.

https://www.moog-suspension-parts.com/universal_inner_tie_rods.asp
'88 TII -  SBE 5.3L, Twin EFR 6758s, T56 Magnum, Ronin 8.8" IRS, MS3Pro Ultimate
716whp/662wtq @1.3bar