|
Sub Frame Mounts
2 Attachment(s)
You can get solid, with or without the GT2 tilt from Tarrett Engineering, about $350. a kit from ERP through Steve Weiner, about $350...don't know if they are solid???? Or you can get the hardened rubber mounts from FVD, a mere $950 or so, and they are on sale!
I have the ERP coming from Steve Weiner. |
Originally Posted by Martin S.
(Post 10328061)
a kit from ERP ... don't know if they are solid????
I have the ERP coming. What do they mean by "solid mounts"? PU or similar or metal?
Originally Posted by Martin S.
(Post 10328061)
Or you can get the hardened rubber mounts from FVD, a mere $950 or so, and they are on sale!
|
Get the solid....I put them in and could not for the life of me discern any additional NVH.
|
I bought the ERP Tilt mounts, but I am thinking I should cut the spacers down to the non-tilt height.
The car has the MO30 Monroe shocks and H&R springs. Any thoughts on this is welcomed. I assume the non-tilt spacers have only two steps as opposed to the four steps? Any pix of the non-tilt spacers? Thanks!!!!! |
Or make your own for $200.
I made these up with stainless steel spherical washer sets above and below the aluminum mount plugs to duplicate the float the rubber had so the bolts have a pure axial draw on them with no bending moment after torquing. You can see the slight motion of the spherical washers relative to each other because of this mis-alignment. These raise the sub-frame 10 mm relative to the chassis floor with no tilt. Kit laid out on floor with new VW sourced 10.9 bolt https://rennlist.com/forums/members/...e-mounts-5.jpg Installed in frame with spherical washer set on top of aluminum mount plug pressed into in sub-frame https://rennlist.com/forums/members/...e-mounts-1.jpg Installed with top and bottom spherical washer sets showing, note the slight offset of the washers due to misalignment https://rennlist.com/forums/members/...2-p1070347.jpg |
Originally Posted by Cupcar
(Post 10329591)
I made these up with stainless steel spherical washer sets above and below the aluminum mount plugs to duplicate the float the rubber had so the bolts have a pure axial draw on them with no bending moment after torquing.
Originally Posted by Cupcar
(Post 10329591)
You can see the slight motion of the spherical washers relative to each other because of this mis-alignment.
Originally Posted by Cupcar
(Post 10329591)
These raise the sub-frame 10 mm relative to the chassis floor with no tilt.
|
Originally Posted by IXLR8
(Post 10329612)
The two washers on each end (of the pic) that look like Belleville washers?
Belleville washers are springs, these are a set of washers with a flat face on one side of both but a convex or concave side on the other so they allow angular motion. http://www.te-co.com/detail/tooling-...al-washers.jpg I'm not seeing that. You are right, I need to take another picture, it is on the bottom more than the top and different with each corner I'd need a good write-up explaining the reason for "tilt". Tilt is to decrease anti-squat in the rear, more important for high powered 993 than mine. |
Things of beauty!!
https://rennlist.com/forums/members/...e-mounts-5.jpg a tilt kit changes the caster and SVIC location w/ flat a 993 has ~93% A/S tilt the front down and the SVIC goes down commensurately lowering A/S. Why would you want more A/S? to put power down at the expense of increased understeer. http://forums.pelicanparts.com/uploa...1361472058.jpg |
Originally Posted by NP993
(Post 10328609)
Get the solid....I put them in and could not for the life of me discern any additional NVH.
|
Originally Posted by Martin S.
(Post 10330034)
NVH? I know it is simple, but what do it mean?
|
Come on...
...admit it, somebody else had no clue on NVH! No I suppose some of us (me) don't have the audacity to ask about SVIC and AS? I am getting schooled on this LSA suspension, and love it too.
|
SVIC- side view instant center, determined by the angle of the planes of the rear suspension and the line from the tire contact patch. The relationship between the SVIC and the Center of Mass determines anti-squat(A/S) and anti-dive(A/D)
|
Originally Posted by Bill Verburg
(Post 10330090)
SVIC- side view instant center, determined by the angle of the planes of the rear suspension and the line from the tire contact patch. The relationship between the SVIC and the Center of Mass determines anti-squat(A/S) and anti-dive(A/D)
Need to re-read Carroll Smith and Fred Puhn for some more suspension detail. |
Originally Posted by Cupcar
(Post 10329591)
These raise the sub-frame 10 mm relative to the chassis floor with no tilt.
Also, since there is no tilt, any reason for the spherical washers or was that to do it right, just in case? Did you turn these parts yourself? I know how pricey SS can get. |
Originally Posted by Bill Verburg
(Post 10330027)
a tilt kit changes the caster and SVIC location
w/ flat a 993 has ~93% A/S tilt the front down and the SVIC goes down commensurately lowering A/S. Why would you want more A/S? to put power down at the expense of increased understeer. http://forums.pelicanparts.com/uploa...1361472058.jpg
Originally Posted by Bill Verburg
(Post 10330090)
SVIC- side view instant center, determined by the angle of the planes of the rear suspension and the line from the tire contact patch. The relationship between the SVIC and the Center of Mass determines anti-squat(A/S) and anti-dive(A/D)
Bill, as always, thanks!!! :thumbup: I will get the engineer who runs the shake and bake section at work to explain all this. His grad paper was on suspension design and he used to race. |
| All times are GMT -3. The time now is 05:56 AM. |
© 2024 MH Sub I, LLC dba Internet Brands