Front lower contol arm bushings blown?

Rusty · 12-18-2019, 10:46 PM

Quote:

Originally Posted by Dentt42

I knew that was coming

The arms themselves aren’t very expensive used, so reversing back to stock or another bushing type is no issue. Also, I’ve tossed around the idea of mixing bushing types, like SPLs at the hub-end of the rear arms and urethane on the chassis connections.

If I have a problem with parts. I post up. Look at my thread on the Bell diff brace. I ripped that part a new azzhole. Still haven't seen my review on the Z1 website on it. Because they won't post it.

The rear lower bushing is silicone filled. So if and when you remove it. Be prepared for a mess.

Dentt42 · 12-20-2019, 10:38 AM

With a decent turnaround time, I got a great answer from SuperPro. I'm confident I'm going to use their stuff now.

Quote:

Originally Posted by Brett @ SuperPro

Thank you for choosing our bushings for your 370Z.

The short answer is that the SPF3886K is meant to be offset from center. This allows the bushings to be oriented in their housings to add positive caster to the vehicle. The additional positive caster will improve on-center feel, weight up the steering some and provide dynamic camber gain with steering angle.

All of these benefits are present whether the car is driven entirely on the street or if it seems more spirited driving, track days, etc.

The only downside is that more attention must be paid during installation to orientate the two bushing assemblies correctly during installation as noted in the instructions.
https://superpro.com.au/find/superpr.../cid-999501122

EDIT: Clarication in teh SP tech's second email:

Quote:

Typically where we offer an offset (normally called a double offset in our terminology) kit – we also offer a standard alignment/geometry kit.

Having a look at our notes we only offer the additional positive caster/offset kit for the 370Z: (SPF3886K).

It is the better performance option when we offer both varieties of a given kit and most times the more popular option. In this case I’m not certain why we don’t offer a standard/non-offset version.

The catalog is correct – I didn’t pay close enough attention answering your last e-mail. The SPF3885K is not the standard version of the SPF3886K – it is the smaller bushing assembly for the forward location on the front lower control arm.

Rusty · 12-20-2019, 10:46 AM

Do you have adjustable upper control arms?

Dentt42 · 12-20-2019, 11:45 AM

Quote:

Originally Posted by Rusty

Do you have adjustable upper control arms?

The whole suspension is stock, and I'm working out the battle plan to get it all taken care of in steps.

Also, it looks like there's a mistake about the two SuperPro numbers, and I'm waiting on a reply for that too. 3886 and 3885 are listed as two different positions on the site: front and rear of the same lower arm.

Rusty · 12-20-2019, 11:57 AM

Quote:

Originally Posted by Dentt42

The whole suspension is stock, and I'm working out the battle plan to get it all taken care of in steps.

Also, it looks like there's a mistake about the two SuperPro numbers, and I'm waiting on a reply for that too. 3886 and 3885 are listed as two different positions on the site: front and rear of the same lower arm.

You going to drive the car before you get the upper arms? I wouldn't until you get the arms. Because your alignment is going to be off.

Dentt42 · 12-20-2019, 12:17 PM

Quote:

Originally Posted by Rusty

You going to drive the car before you get the upper arms? I wouldn't until you get the arms. Because your alignment is going to be off.

Most likely no. My plan is to buy good core (aka used) control arms, upgrade the bushings on them, and then I can swap them out with shorter downtime. This arrangement worked well on my previous project, a WRX, and it made for a lot less transportation issues and borrowing cars.

NOTE: There was a small miscommunication in my emails with SuperPro, and it's been corrected above for anyone else that may be interested.

Tractionless · 12-23-2019, 06:02 PM

Quote:

Originally Posted by Dentt42

Most likely no. My plan is to buy good core (aka used) control arms, upgrade the bushings on them, and then I can swap them out with shorter downtime. This arrangement worked well on my previous project, a WRX, and it made for a lot less transportation issues and borrowing cars.

NOTE: There was a small miscommunication in my emails with SuperPro, and it's been corrected above for anyone else that may be interested.

So all the Superpro stuff is for use with OE Arms etc. correct?

Does it allow for adjustment and/or is there and option to stay with oe non-adjustable geometry?

Thanks

12-20-2019, 10:46 AM	#3 (permalink)
Rusty A True Z Fanatic Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 70 Posts: 35,575 Drives: 2011 Nismo GM 6M Rep Power: 2684440	Do you have adjustable upper control arms? __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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