Custom subframe - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

diss7 · 12-22-2013, 03:30 AM

Had the car up on the hoist getting a few things done today.

One thing we wanted to look at was correcting the rear roll centre. It didn't take my fabricator long to decide that it would be best to make a new subframe with multiple arm mount options for correcting roll centre / suspension geometry.

He also mentioned about solid mounting the frame to the car, and using more generic nolothane bushings rather than application specific ones we are governed to use at the moment.

There'll also be a tidy weight saving.

My subframe will be coming off in the coming weeks to make a jig. Anyone interested in getting one made up as well, flick me a PM or mention something here.

This is a fairly serious part, but a worthwhile investment for track guys.

At a guess, I'd expect the price to be in the $4k region.

whataboutbob · 12-22-2013, 12:13 PM

Beyond my price range but VERY interested to see what you come up with. Good luck and please post lots of photos.

Suberman · 12-22-2013, 01:48 PM

I'd be interested in knowing what changes are being contemplated to the rear roll centre.

Making it higher or lower?

diss7 · 12-22-2013, 03:07 PM

Quote:

Originally Posted by Suberman

I'd be interested in knowing what changes are being contemplated to the rear roll centre.

Making it higher or lower?

The way he explained it to me was that he'd rip out my subframe and make a jig to copy the stock arm locations. Then to account for roll centre, each ar's mounting point on the subframe will have more mounts above it to correct for roll centre.

So as you lower the car, and the control arms move away from their ideal angle, you'd move the control arms up a notch or two on the subframe to put them back at a more ideal angle.

Anthony · 12-22-2013, 04:32 PM

I just found the thread I was telling you about earlier. Here it is: http://www.ft86club.com/forums/showthread.php?t=48157

Anthony · 12-22-2013, 05:03 PM

@7thgear

Suberman · 12-22-2013, 08:00 PM

So, the ability to restore the roll height to factory spec after lowering the car, at least relatively to the new ride height. Not to adjust the effective roll center to a different height.

diss7 · 12-22-2013, 09:04 PM

Quote:

Originally Posted by Suberman

So, the ability to restore the roll height to factory spec after lowering the car, at least relatively to the new ride height. Not to adjust the effective roll center to a different height.

Not sure I follow.
You'll be able to adjust them without lowering. It'll just be in increments.

solidONE · 12-22-2013, 09:28 PM

I'm assuming you guys have seen this before.

Good as a reference for your welder.

Captain Snooze · 12-23-2013, 12:42 AM

Quote:

Originally Posted by solidONE

I'm assuming you guys have seen this before.

Good as a reference for your welder.

Holy mother of f**k!!! What is that? I have no idea why the first thing that came to mind was Godzilla!! (I do not mean that in a bad way!) Could you please tell me/us more about that?

(I have to hide my wallet when I see stuff like this.)

Calum · 12-23-2013, 05:09 AM

Quote:

Originally Posted by Captain Snooze

Holy mother of f**k!!! What is that? I have no idea why the first thing that came to mind was Godzilla!! (I do not mean that in a bad way!) Could you please tell me/us more about that?

(I have to hide my wallet when I see stuff like this.)

Did you also notice the nameless oil cooler with hard lines, oh and the turbo kit they made for it to?

Captain Snooze · 12-23-2013, 05:15 AM

Also "meless" on the hoist arm.

TouchMyHonda · 02-17-2014, 01:15 PM

WAT!

12-22-2013, 03:30 AM	#1
diss7 Banned Join Date: Sep 2012 Drives: AE86, 2x GT86, TE27 Location: Christchurch NZ Posts: 1,478 Thanks: 826 Thanked 1,181 Times in 522 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	Custom subframe Had the car up on the hoist getting a few things done today. One thing we wanted to look at was correcting the rear roll centre. It didn't take my fabricator long to decide that it would be best to make a new subframe with multiple arm mount options for correcting roll centre / suspension geometry. He also mentioned about solid mounting the frame to the car, and using more generic nolothane bushings rather than application specific ones we are governed to use at the moment. There'll also be a tidy weight saving. My subframe will be coming off in the coming weeks to make a jig. Anyone interested in getting one made up as well, flick me a PM or mention something here. This is a fairly serious part, but a worthwhile investment for track guys. At a guess, I'd expect the price to be in the $4k region.

12-22-2013, 04:32 PM	#5
Anthony Weight Nazi Join Date: Aug 2012 Drives: 13 FRS -399lb, 11 335is, 05 Tiburon Location: Biloxi, MS / Gulf Coast 86 Posts: 3,702 Thanks: 5,009 Thanked 3,714 Times in 1,765 Posts Mentioned: 150 Post(s) Tagged: 4 Thread(s)	I just found the thread I was telling you about earlier. Here it is: http://www.ft86club.com/forums/showthread.php?t=48157 __________________ Build Thread \| The Venus Project \| Any car which holds together for a whole race is too heavy.

12-22-2013, 05:03 PM	#6
Anthony Weight Nazi Join Date: Aug 2012 Drives: 13 FRS -399lb, 11 335is, 05 Tiburon Location: Biloxi, MS / Gulf Coast 86 Posts: 3,702 Thanks: 5,009 Thanked 3,714 Times in 1,765 Posts Mentioned: 150 Post(s) Tagged: 4 Thread(s)	@7thgear __________________ Build Thread \| The Venus Project \| Any car which holds together for a whole race is too heavy.

12-23-2013, 05:15 AM	#12
Captain Snooze Because compromise ® Join Date: Jan 2012 Drives: Red Herring Location: australia Posts: 7,823 Thanks: 4,053 Thanked 9,565 Times in 4,199 Posts Mentioned: 60 Post(s) Tagged: 0 Thread(s)	Also "meless" on the hoist arm. __________________ My car is completely stock except for all the mods.

02-17-2014, 01:15 PM	#13
TouchMyHonda Vtec Jesus Join Date: Jul 2012 Drives: 13 BRZ, 13 Golf R, 15 Audi S4 Location: LSD Posts: 1,165 Thanks: 623 Thanked 243 Times in 153 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	WAT! __________________ OFT Remote, OFH, Motiv OP & FP, Perrin 3' CB & 3' IT, Setrab/MoCal cooler, STI motor mounts, Wilwood 6/4 plot F&R 12.8 kits, Brake ducts, complete Whiteline catalog, complete bushing replacement, OSGiken clutch & Diff, 4.556 FD, Stance W/Spec valving 8/9 Swift.

12-22-2013, 01:48 PM	#3
Suberman Banned Join Date: Jul 2013 Drives: Subaru BRZ Sport Tech Satin White Location: Calgary, Alberta,Canada Posts: 1,228 Thanks: 147 Thanked 320 Times in 225 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	I'd be interested in knowing what changes are being contemplated to the rear roll centre. Making it higher or lower?

12-22-2013, 08:00 PM	#7
Suberman Banned Join Date: Jul 2013 Drives: Subaru BRZ Sport Tech Satin White Location: Calgary, Alberta,Canada Posts: 1,228 Thanks: 147 Thanked 320 Times in 225 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	So, the ability to restore the roll height to factory spec after lowering the car, at least relatively to the new ride height. Not to adjust the effective roll center to a different height.

12-22-2013, 09:28 PM	#9
solidONE Senior Member Join Date: Dec 2012 Drives: FR-S Whiteout Location: California Posts: 2,863 Thanks: 1,808 Thanked 791 Times in 611 Posts Mentioned: 42 Post(s) Tagged: 0 Thread(s)	I'm assuming you guys have seen this before. Good as a reference for your welder.

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