Diff Mount Dimensions?

[Black Beaut]

Hi Folks,

Hoping you can help me out with some numbers here. I'm coming up with a design for a front diff mount but can't get to my car to measure things up for a while. The two real important dimensions I need are the distance apart that the two long bolts (that clamp the diff to the mount) are from the central bolt that holds the mount to the diff cross member. And the distance from the mounting hole in the cross member towards the hump where the member rises to go over to the exhaust - I need the distance from the hole centre to where the metal starts to curve up, so just the maximum flat width available there.

Hopefully the attached pic will make things a bit clearer :knockedou

Cheers,

Rob

[Ed]

Hi, hope I got what you need. The distance between the two bolts that go from the mount to the diff is 90 mm. Distance from the center bolt is 18 mm. And from the mounting hole to the begining of the hump is 50 mm. And from the mounting hole to the end of the hump is 145 mm. If you need anything else let me know and I can go measure.

[Black Beaut]

Thanks Ed, that's perfect!

Cheers,

Rob

[AChev]

Hey , if your front diff. mount ever is created make sure you keep us all posted. Im dying to hear how well it will work.

Andy

[Black Beaut]

Will do Andy, I think my plans are pretty much finalised now thanks to Ed. Just need to find a good welder/fabricator who can produce it to the tolerances I'm after - that's "spot on or you ain't getting paid mate!"

Cheers,

Rob

[panchovisa]

Check out billet aluminum mount at:

http://www.arizonazcar.com/diffmount.html

[Black Beaut]

I'm know Dave's diff mount well, lovely piece of machining. Downside of course is the extra noise and vibration passed in to the car. Hopefully my design will give a good solid mount but still have some compliance as it uses bushes and work a lot better than the standard piece of marshmellow. I've just taken the plans down to a fabricator so should have the first prototype in a couple of weeks.

Here's a little animation to give you an idea, don't think it's worth me worrying about design copyright, especially given the cost to get the first one made :surprised think I need to learn how to weld!

http://www.robshelley.btinternet.co.uk/240z/diff_mount/

Cheers,

Rob

[panchovisa]

Man, your going all out. Are those rubber or urethane bushings?

[Black Beaut]

They're actually going to be Delrin as I got hold of some of blank rods on Ebay. I was originally going to go with rubber but that would have meant tracking down as suitable sized bush and I'm for too lazy Urethane is probably the best compromise but also means tracking down something in the right size (see above ) so I went with the Delrin which the machinist can cut on a lathe to the perfect size.

Cheers,

Rob

[Black Beaut]

Hi All,

Got the prototype back at the weekend, I'm pretty pleased with it, certainly looks like it's up to the job. The welding could be a bit neater I guess but that's just being picky. I'm going to slap some POR15 on it and then hopefully get it on my Z sometime soon!

I'm kinda interested in producing these if the prototype works OK. I need to look at some slightly different production methods though as the cost for this one prototype was approx. £250 ($460) so I can't see there being that many orders from you guys over the pond. The machinist thought that having the top cross member made up from an aluminium casting and machined for final size would save quite a bit. I'm also looking at metal bending equipment so that I can manufacture the channel section in the lower cradle from one piece and do away with all the welding there.

Out of interest, what sort of price would you guys be willing to pay for something like this? Give me something to work towards!

Cheers,

Rob

[gnosez]

nice and solid looking mounts! For our club race car we took a very slightly used diff mount and welded 1/4-inch bar stock that connects the 2 plates. Not a street ride unless you like that sort of thing or as pretty as your's or Dave's (AZ Z car) but it works real well. Look forward to seeing the finished product.......

[Black Beaut]

Thanks John, I've been admiring your g-nose as featured in our UK club mag, gorgeous motor there. I've got to admit I'm very tempted to go G myself having seen yours!

Cheers,

Rob