Ross at MM..mia???

[Palmer]

I sent a few questions to Ross over at MM and haven't heard back from him in several days. Anyone else having trouble getting in touch with him?

[jmortensen]

He isn't the best at responding to emails, but that's because MM is a side biz for him. He also has a full time job. Sometimes you just have to be patient with him, but on the upside he makes some really good parts that you won't find anywhere else.

[Arne]

A question from the ignorant - What is MM?

[jmortensen]

www.modern-motorsports.com

[Palmer]

Roger that...I'm just at a brain block about what to do as far as upgrading the front brakes. The MM rear disc upgrade pack uses 11.4" rotors. I'd like to use the same size rotor up front so they look the same through the wheels when the car is viewed from the side. Trying to figure out if there is a bracket/rotor combo that would work. I'd use the 240SX calipers with the MM upgrade package in the rear and ? up front. I've been through the majority of posts here and at Hybrid but can't find anything about uising the same size rotors all the way around. Not sure if this is even possible. I know about the Arizona Z car brake upgrade, little too much overkill for me. Soooo, not sure if this is even possible...:stupid:

[jmortensen]

Vented Toyota setup is 11" I think. Really if anything fronts should be a little larger. They do more than the rear because of weight transfer, and the increased leverage from the larger disk can be helpful in getting the right amount of bias. Look up some specs on most new cars and you'll see larger disks in front. Look at motorcycles and you'll see that they have 2 larger disks up front and one smaller one in back.

But if you really want them to look the same, probably the vented Toy front with the 240SX rear is your best bet. I think Ross sells all of the necessary parts.

[Palmer]

Thanks Jim...

[jmortensen]

It's Jon, but you're welcome anyway!

[Palmer]

:stupid: OK...thanks Jon....but this just brought up another issue...I understand about the bias towards the front brakes and weight transfer, but for those folks that did use the MM rear disc upgrade kit like I plan on doing, and they left the front set-up as stock, then they all have larger rotors and calipers in the rear which is reverse of what it should be, aye? Unless they are using the proportioning valve to transfer more 'brakeage' to the front...I usually don't drink this early, on a Monday, but I may have to start today.:stupid:

[jmortensen]

You know, my previous statement wasn't a very good one in truth. There's a lot of variables, disk size is only one of them. Others are piston size, brake pad size and pad coefficient of friction. If you're using dual masters the master size also affects the bias.

The stock front brakes are 11". The vented Toy setup is the same diameter, but uses a much larger caliper and brake pads. So that affects bias. I think the Toy front would be a pretty good match for the 240SX rear, but I haven't tried it myself.

Here's a spreadsheet that will really confuse the crap out of you, courtesy of Tom Holt. www.sth2.com/Z-car/Brakemath.xls That's really getting anal about it. If this is a street car the Toy front, 240SX rear and an adjustable proportioning valve should be all you really need.

[Palmer]

Just looked at the spreadsheet...Just poured my first drink...:sick:

[=Enigma=]

I think I need a drink after looking at that. Doesn't take much to convince me...:eek: