SPL FLCA TSB released

[GuyLedouche]

See the link for more info.

https://www.splparts.com/tsb-2301/?f...s-2E8FZZp2PrP4

[FaRKle!]

Good find. I've seen a few stories over the past year and a half of this bolt shearing at the track.

Their inspection instructions are kind of confusing.

They should've organized them like so:
1) Check if current torque is >110 ft-lbs, if not replace, fasteners
2) If current torque is >110 ft-lbs, unfasten bolt/nut, remove, and clean bolt threads. Replace all-metal nut if next installation will be 3rd tightening, replace nylock nut if next installation will be 4th tightening.
3) Install bolt/nut and torque to 180 ft-lbs.
4) Inspect 180 ft-lbs installation torque during your tech inspections.

How many people are going to realize their basic torque wrenches don't go to 180 ft-lbs? =P

[Track/S]

GT4 arms or nothing.

[GuyLedouche]

Originally Posted by FaRKle!

Good find. I've seen a few stories over the past year and a half of this bolt shearing at the track.

Their inspection instructions are kind of confusing.

They should've organized them like so:
1) Check if current torque is >110 ft-lbs, if not replace, fasteners
2) If current torque is >110 ft-lbs, unfasten bolt/nut, remove, and clean bolt threads. Replace all-metal nut if next installation will be 3rd tightening, replace nylock nut if next installation will be 4th tightening.
3) Install bolt/nut and torque to 180 ft-lbs.
4) Inspect 180 ft-lbs installation torque during your tech inspections.

How many people are going to realize their basic torque wrenches don't go to 180 ft-lbs? =P

I would think if you confirm torque is above xxx value then you can assume the failure mode is not present. I hate loosening and re torquing bolts on important fasteners like this.

[FaRKle!]

Originally Posted by GuyLedouche

I would think if you confirm torque is above xxx value then you can assume the failure mode is not present. I hate loosening and re torquing bolts on important fasteners like this.

I agree that you *should* just be able to torque to 180 ft-lbs if you do the check and find it hasn't backed off from 110 ft-lbs. I was just stating more simply what they said in their instructions.

[mikerunt]

Originally Posted by Track/S

GT4 arms or nothing.

How different are the GT4 arms than the GTS arms? Do they require additional GT4 components to function correctly.

[RbBugBitMe]

I need to see an explanation of the problem and reasons for the solution before buying a set. I don't know why a stud and 2nd nut (2nd point of failure) is going to solve the problem.

[Track/S]

Originally Posted by mikerunt

How different are the GT4 arms than the GTS arms? Do they require additional GT4 components to function correctly.

F8X arms vs M4 GT4:




To mount on the F8X, 12mm steering stoppers are necessary, depending on the rim and spacer configuration longer arms are needed.
I made custom lengh for my setup.

Originally Posted by RbBugBitMe

I need to see an explanation of the problem and reasons for the solution before buying a set. I don't know why a stud and 2nd nut (2nd point of failure) is going to solve the problem.

I wouldn't waste time looking for a solution to something that seems to have been made by a 5 year old child

[GuyLedouche]

Originally Posted by Track/S

I wouldn't waste time looking for a solution to something that seems to have been made by a 5 year old child

What are you talking about?

[mikerunt]

Thanks!

Any idea on part no?

[Track/S]

Originally Posted by mikerunt

Thanks!

Any idea on part no?

For your GTS these would be the part numbers:

33308431220 2units
33308431221 2units

41008427442 4units
41008427443 4units

31108431887 4units
31108431217 4units

31108324096 4units
31108324102 4units

31108324097 4units

[mikerunt]

Originally Posted by Track/S

For your GTS these would be the part numbers:

33308431220 2units
33308431221 2units

41008427442 4units
41008427443 4units

31108431887 4units
31108431217 4units

31108324096 4units
31108324102 4units

31108324097 4units

TY!

[Track/S]

Originally Posted by mikerunt

TY!

I forgot to add the steering stopers, you can buy the ones of the gt4 and reduce them to 12mm or ask a turner to make 2 of 12mm

30mm stoppers part number:

32108431559

[FaRKle!]

So update to this...

A friend's shop called me on Friday and said, "Hey FaRKle! by chance do you have any extra SPL bolts or studs?"

"I actually do have the stud retrofit kit for my SPL LCA, but haven't installed it yet, why?"

*receives picture of new SPL stud sheared in half*

"We installed this SPL stud, torqued to 180ft-lbs as the instructions say, and while we were working on the other side (before the car was put on the ground) heard a *pop* noise and noticed the stud had broken!"


After calling SPL about it (who overnighted them a new set of studs, but they had a track day the following morning), SPL instructed them to only torque to 160ft-lbs now...

Originally Posted by RbBugBitMe

I need to see an explanation of the problem and reasons for the solution before buying a set. I don't know why a stud and 2nd nut (2nd point of failure) is going to solve the problem.

You called it!

RbBugBitMe also took a look at the pictures and suspects hydrogen embrittlement from the way it broke.

[RbBugBitMe]

Originally Posted by FaRKle!

So update to this...

A friend's shop called me on Friday and said, "Hey FaRKle! by chance do you have any extra SPL bolts or studs?"

"I actually do have the stud retrofit kit for my SPL LCA, but haven't installed it yet, why?"

*receives picture of new SPL stud sheared in half*

"We installed this SPL stud, torqued to 180ft-lbs as the instructions say, and while we were working on the other side (before the car was put on the ground) heard a *pop* noise and noticed the stud had broken!"



After calling SPL about it (who overnighted them a new set of studs, but they had a track day the following morning), SPL instructed them to only torque to 160ft-lbs now...

An ME I know that took a look at the pictures suspects hydrogen embrittlement from the way it broke.

Geez, just lower the torque a little? SPL is not trustworthy to me at this point.

[Track/S]

Originally Posted by RbBugBitMe

Geez, just lower the torque a little? SPL is not trustworthy to me at this point.

Spl is a best garbage on the world.

[Gossypiboma]

Originally Posted by Track/S

Spl is a best garbage on the world.

Curious what brand(s) you would suggest for arms.

[Track/S]

Originally Posted by Gossypiboma

Curious what brand(s) you would suggest for arms.

Bmw motorsport with a few small modifications.

[NORAGRETS]

Originally Posted by Track/S

For your GTS these would be the part numbers:

33308431220 2units
33308431221 2units

41008427442 4units
41008427443 4units

31108431887 4units
31108431217 4units

31108324096 4units
31108324102 4units

31108324097 4units

Would these fit on a f80?

[NORAGRETS]

Originally Posted by mikerunt

TY!

Originally Posted by Track/S

For your GTS these would be the part numbers:

33308431220 2units
33308431221 2units

41008427442 4units
41008427443 4units

31108431887 4units
31108431217 4units

31108324096 4units
31108324102 4units

31108324097 4units

These are shockingly inexpensive

[NORAGRETS]

Originally Posted by Track/S

Bmw motorsport with a few small modifications.


[img]https://i.ibb.co/176SmRk/20231024-144156.jpg[/img]

What are the part numbers for the front linkage?

[medphysdave]

You won't find nicer machined parts than what Track/S turns out. I've got a number of parts on my car and plan to get a full set of arms front and rear. He turned me a set of solid front tension bushings to hold me over. The thought that goes into improving the hardware and not just another of the same, can't be ignored.