Who's making the move to STU?

Brendan · 05-31-2019, 04:52 PM

if only spl would make a poly bushing version of their arms. I have the z1 arms and was wondering why I had full turn differences left to right. turns out the threaded tube that the upper ball joint threads in is not even close to welded in the same area. frustrating but it was the best option i could see as far as legality and cost.

gomer_110 · 05-31-2019, 08:19 PM

I can't speak to the SPL front arms, but the rear camber arms and the midlinks can easily be converted to be compliant with the rules. You just have to buy some poly-bushed rod ends to replace the sphericals that came with the arms. The only other thing is to get a local machine shop to make a couple spacers and a replacement center sleeve to make them fit. This is the exact setup I have on my BSP car.

I would think their fronts arms would be just as easy to convert.

Brendan · 05-31-2019, 08:34 PM

Quote:

Originally Posted by gomer_110

I can't speak to the SPL front arms, but the rear camber arms and the midlinks can easily be converted to be compliant with the rules. You just have to buy some poly-bushed rod ends to replace the sphericals that came with the arms. The only other thing is to get a local machine shop to make a couple spacers and a replacement center sleeve to make them fit. This is the exact setup I have on my BSP car.

I would think their fronts arms would be just as easy to convert.

Thats not a bad idea. We have a local guy who built an f mod car from scratch. I'm sure he knows his way around a lathe.

_BES7499 by brendan sobers, on Flickr

gomer_110 · 05-31-2019, 08:56 PM

Poly Rod Ends This is what I used just maybe not the same size (can't remember anymore). All the lathe pieces I think ran me around $75.

Brendan · 06-04-2019, 09:56 PM

we have another option for adjustable front links now.

I ordered these before my car got destroyed and will be installing them on the new vehicle. Interested to see how well they work.

It also appears the moonface links have come down in price if you're looking for a more premium experience.

///maestro · 06-05-2019, 02:03 PM

I love my whiteline swaybar and endlinks. Car handles like it's on rails!

Brendan · 06-24-2019, 04:32 PM

Finally got the new car built. I am really considering changing out the z1 front arms. I hate doing stuff twice but that's just the way it is some times. It's frustrating how inconsistent they are and it's kind of a pain to have to disassemble the front suspension to make minor changes. I am concerned with the legality of the new spc arms so I may do that as a next season change after nationals.

Zewerr · 06-24-2019, 11:52 PM

I'm just now discovering that the cheaper SPC control arms also have caster adjustment. It's hard to tell what kind of bushings it has from the pictures, though. Anyone know if they are standard rubber or poly, and not spherical?

Brendan · 06-25-2019, 07:46 AM

https://www.spcalignment.com/index.p...tion&pid=25002 the upper control arm are pretty much an adapter for their ball joints. seems sealed metal to metal, but that may also be what we have stock.

Zewerr · 06-25-2019, 09:50 AM

The ball joint should not be the problem. The bushing itself is what may potentially be the problem. SPC's more expensive arms have a rubber/spherical hybrid for their bushings which I don't think is legal since metal content is increased and bushing material is decreased. I think they mainly used this because the entire arm articulates. So, without a spherical bushing, it would put a lot of stress on the bushing if you adjusted away from it's true neutral position. But, since the there is no adjustment to the arm itself on the cheaper arm, they can probably use a regular style bushing, either rubber or poly. I've looked at more pictures of them I've found on the interwebs and they appear like they're legal. I may switch to these arms.

gomer_110 · 06-25-2019, 05:37 PM

The original design SPC FUCA's have a standard poly bushing on the chassis side and are legal. These are what I have on my BSP car.

Brendan · 06-26-2019, 07:53 AM

Quote:

Originally Posted by gomer_110

The original design SPC FUCA's have a standard poly bushing on the chassis side and are legal. These are what I have on my BSP car.

Did you need to modify them to hold settings? I remember that being an issue with them when I first started researching these cars. Also curious about how much camber/castor you can get out of them.

Justint5387 · 06-26-2019, 10:46 AM

I had the old SPC arm and didn't have issue of it slipping.

gomer_110 · 06-26-2019, 06:38 PM

I think from the time I put them on in 2015 till now, I've had one arm slip once and it wasn't even that much (~0.5°).

Regarding how much camber you can get, from what I remember with the adjustment all the way inward it was around 4-4.5° which is more that I've ever needed.

Brendan · 06-27-2019, 09:17 PM

Quote:

Originally Posted by gomer_110

I think from the time I put them on in 2015 till now, I've had one arm slip once and it wasn't even that much (~0.5°).

Regarding how much camber you can get, from what I remember with the adjustment all the way inward it was around 4-4.5° which is more that I've ever needed.

That is good to know. What do you think was the cause of the slip?

05-31-2019, 08:19 PM	#2 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36941	I can't speak to the SPL front arms, but the rear camber arms and the midlinks can easily be converted to be compliant with the rules. You just have to buy some poly-bushed rod ends to replace the sphericals that came with the arms. The only other thing is to get a local machine shop to make a couple spacers and a replacement center sleeve to make them fit. This is the exact setup I have on my BSP car. I would think their fronts arms would be just as easy to convert. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

05-31-2019, 08:56 PM	#4 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36941	Poly Rod Ends This is what I used just maybe not the same size (can't remember anymore). All the lathe pieces I think ran me around $75. Brendan likes this. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

06-04-2019, 09:56 PM	#5 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 646 Drives: Poor man's Porsche Rep Power: 542	we have another option for adjustable front links now. I ordered these before my car got destroyed and will be installing them on the new vehicle. Interested to see how well they work. It also appears the moonface links have come down in price if you're looking for a more premium experience. Rusty, Hotrodz and Justint5387 like this.

06-05-2019, 02:03 PM	#6 (permalink)
///maestro Track Member Join Date: Dec 2014 Location: Grand Rapids, MI Posts: 530 Drives: 11' 370z\|09' BMW M3 Rep Power: 12	I love my whiteline swaybar and endlinks. Car handles like it's on rails! __________________ Gallo24 swapped 370z Instagram: @z34_motorsport

06-25-2019, 05:37 PM	#11 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36941	The original design SPC FUCA's have a standard poly bushing on the chassis side and are legal. These are what I have on my BSP car. Brendan likes this. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

05-31-2019, 04:52 PM	#1 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 646 Drives: Poor man's Porsche Rep Power: 542	if only spl would make a poly bushing version of their arms. I have the z1 arms and was wondering why I had full turn differences left to right. turns out the threaded tube that the upper ball joint threads in is not even close to welded in the same area. frustrating but it was the best option i could see as far as legality and cost.

06-24-2019, 04:32 PM	#7 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 646 Drives: Poor man's Porsche Rep Power: 542	Finally got the new car built. I am really considering changing out the z1 front arms. I hate doing stuff twice but that's just the way it is some times. It's frustrating how inconsistent they are and it's kind of a pain to have to disassemble the front suspension to make minor changes. I am concerned with the legality of the new spc arms so I may do that as a next season change after nationals.

06-24-2019, 11:52 PM	#8 (permalink)
Zewerr Base Member Join Date: Jan 2019 Location: Tacoma, WA Posts: 45 Drives: 11 370Z 82/182 STU Rep Power: 7	I'm just now discovering that the cheaper SPC control arms also have caster adjustment. It's hard to tell what kind of bushings it has from the pictures, though. Anyone know if they are standard rubber or poly, and not spherical?

06-25-2019, 07:46 AM	#9 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 646 Drives: Poor man's Porsche Rep Power: 542	https://www.spcalignment.com/index.p...tion&pid=25002 the upper control arm are pretty much an adapter for their ball joints. seems sealed metal to metal, but that may also be what we have stock.

06-25-2019, 09:50 AM	#10 (permalink)
Zewerr Base Member Join Date: Jan 2019 Location: Tacoma, WA Posts: 45 Drives: 11 370Z 82/182 STU Rep Power: 7	The ball joint should not be the problem. The bushing itself is what may potentially be the problem. SPC's more expensive arms have a rubber/spherical hybrid for their bushings which I don't think is legal since metal content is increased and bushing material is decreased. I think they mainly used this because the entire arm articulates. So, without a spherical bushing, it would put a lot of stress on the bushing if you adjusted away from it's true neutral position. But, since the there is no adjustment to the arm itself on the cheaper arm, they can probably use a regular style bushing, either rubber or poly. I've looked at more pictures of them I've found on the interwebs and they appear like they're legal. I may switch to these arms.

06-26-2019, 10:46 AM	#13 (permalink)
Justint5387 Base Member Join Date: Aug 2014 Location: Bay Area, CA Posts: 188 Drives: 2016 370z Silver 6MT Rep Power: 12	I had the old SPC arm and didn't have issue of it slipping.

06-26-2019, 06:38 PM	#14 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36941	I think from the time I put them on in 2015 till now, I've had one arm slip once and it wasn't even that much (~0.5°). Regarding how much camber you can get, from what I remember with the adjustment all the way inward it was around 4-4.5° which is more that I've ever needed. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

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