CNC'ed front subframe bushings

[black_gst]

these are my new front CNC'ed front subframe bushings!!!

CNC'ed rear subframe bushings and rear diff bushings are in the works and will be done soon!
remember I am just sharing pictures of what I have made for myself.
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[black_gst]

these are the same ones Andrew Brilliant ran in his time attack car

http://www.dsmtuners.com/forums/blogs/gixxerdrew/2479-getting-ready-race.html

 

[sniperelite]

They look great!!

What are the cons of running these on a street/weekend car, if any?

 

[black_gst]

Thanks!

none have been reported, I know several people that have had them for awhile and have had zero issues and none have even noted added road noise.

for reference if you get under an Evo 8/9 you will notice that both their front and rear sub frames are solid mounted with no rubber bushings.

 

[sbeck]

PM Sent definitely want a set for the front. I have found other companies that do rears but your all I found doing front subframe.

 

[black_gst]

PM Sent definitely want a set for the front. I have found other companies that do rears but your all I found doing front subframe.

yeah I think split motorsports makes them, but they make a 3 piece rear which i think is a poor design, but Im sure they do it to save money on material

 

[99gst_racer]

Adam, do you have a installation write-up for these? Just wondering how easy it is to get the OE bushings out.

 

[black_gst]

Adam, do you have a installation write-up for these? Just wondering how easy it is to get the OE bushings out.

I dont have a write up, but its very easy. only of of the 6 bushing have a mental outer sleeve and that one is a straight through hole not a cup like the other subframe bushings. the other 4 bushings are just rubber and the pop out pretty easy.

then just press them in

heres a shot with them installed that im borrowing form a customer

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[3kgt2nv]

after working in a machine shop for a few years i always wondered how these will hold up long term wise. I know at the shop i worked at we would always press in a steel sleeve to prevent the alum from deforming under the stress of the car launching. Every set of alum mounts never have it so i was just curious.

 

[99gst_racer]

Thanks for the pics, Adam. Which hole(s) have the sleeve? I assume it needs to be cut out just like when doing poly engine mounts?

 

[3kgt2nv]

the center bolt hole in the alum mount. just like how the energy suspensions use a steel insert. The alum mounts we made used a thinner steel insert just to help with deformation of the alum. not sure if its needed or not but thats how they were built. just wondering since a bunch of people make them on here without the insert.

 

[black_gst]

these ones and yes just cut it like you would a motor mount

 

[black_gst]

the center bolt hole in the alum mount. just like how the energy suspensions use a steel insert. The alum mounts we made used a thinner steel insert just to help with deformation of the alum. not sure if its needed or not but thats how they were built. just wondering since a bunch of people make them on here without the insert.

I have yet to hear of anyone having this problem, plus i make these holes extra tight so theres really no movement that will allow deformation to start.

 

[black_gst]

also heres a quote from Andrew Brilliant

One thing, we did test chassis torsional stiffness. Results were notable improvement of 16% which is marked since we are talking about a car with an existing roll cage.

 

[3kgt2nv]

I have yet to hear of anyone having this problem, plus i make these holes extra tight so theres really no movement that will allow deformation to start.

Makes sense, was just curious.