Porsche brakes... out of curiousity.

[Mystikal]

the offset doesnt really matter here its the distance between the face of the rotor and the back of the wheel thats the problem

Dude, that is offset.

[BeirBrennerE30]

the offset doesnt really matter here its the distance between the face of the rotor and the back of the wheel thats the problem

Dude, that is offset.

not exactily... offset is the distance betweenthecenterline of the wheel and where the mounting surface is....

the distance that is a big problem with big brake kits is the distance between the mounting surface and the back of the spokes of the wheel

offset os not a problem with big brakes the problem is with this second measurement... the plane of the e30 rotor is really close to the mouoning surface for the wheels... this is bad for big calipers because because the calipers hang past the plane of the mounting surface and into where the plane of the spokes are on most wheels... the spacer is not needed for offsets sake... it is needed to move the plane of the spokes away from the plane of the rotors to give more room for the overhang of the calpier...

example..... take a BBS RX wheel and an SSR comp wheel.... assume both wheels are 17"x7.5" with the same offset.... say 30ish....the plane of the spokes on the RX are super close to the plane of the mounting surface of the wheel.... a 20mm spacer is needed to fit the porsche calipers since the calipers stick out further (depth wise) than the stock e30 calipers.... on th SSR the spokes stick out really close to the front of the rim and then bend back in.... the distance between the mounting face and the bakcs of teh spokes is a lot larger than that of the BBS rim.... only a 10-15mm spacer is needed for this rim eventhough the offset is the same as the BBS rim....

i hope this makes it clearer... im looking for a pic to illustrate what im trying to say

[Mystikal]

I understand what you mean with regards to different wheels need will require different offsets to work. But the main principal is still true, a wheel with a lower offset WILL have more space for calipers, all other factors being equal.

[BeirBrennerE30]

I understand what you mean with regards to different wheels need will require different offsets to work. But the main principal is still true, a wheel with a lower offset WILL have more space for calipers, all other factors being equal.

thats not at all true... offset has absolutely nothing to do with caliper clearance

[Brew]

It seems as though if you were going to do a BBK, you're best be would be to get some honda offset wheels, like et40 or 45, and run big spacers. Am I right?

[BeirBrennerE30]

It seems as though if you were going to do a BBK, you're best be would be to get some honda offset wheels, like et40 or 45, and run big spacers. Am I right?

yep... thats probably your best option.... no wheel that isnt custom is going to have enough room on the e30... huge spacers are a must

[Mystikal]

It seems as though if you were going to do a BBK, you're best be would be to get some honda offset wheels, like et40 or 45, and run big spacers. Am I right?

That is the exact same final product as a wheel with a lower offset to begin with.

[nando]

what he's trying to say is the spoke design also makes a differenece in calper clearance. two wheels with the same offset could have issues if one has a super deep dish (where the SPOKES would be closer to the hub surface of the wheel).

[Brew]

It seems as though if you were going to do a BBK, you're best be would be to get some honda offset wheels, like et40 or 45, and run big spacers. Am I right?

That is the exact same final product as a wheel with a lower offset to begin with.

Nope, there would be more clearance with a high offset wheel because the spokes are further out. Say you had a set of BBS RZ's in both et25 and et45 offsets.... the spoke pattern on the et45 wheels would be further out on the wheel; they would have less dish, but more caliper clearance when used with 20mm spacers.

[Mystikal]

Nope, there would be more clearance with a high offset wheel because the spokes are further out. Say you had a set of BBS RZ's in both et25 and et45 offsets.... the spoke pattern on the et45 wheels would be further out on the wheel; they would have less dish, but more caliper clearance when used with 20mm spacers.

No, you would have the exact same thing. It's a difficult concept to understand, but you get the EXACT same final product.

[BeirBrennerE30]

Nope, there would be more clearance with a high offset wheel because the spokes are further out. Say you had a set of BBS RZ's in both et25 and et45 offsets.... the spoke pattern on the et45 wheels would be further out on the wheel; they would have less dish, but more caliper clearance when used with 20mm spacers.

No, you would have the exact same thing. It's a difficult concept to understand, but you get the EXACT same final product.

i guess it is really difficuly because you dont get it... they would not be the same!!!!

the offset would be the same but the clearance would be completely differnt!!!!

[Brew]

i guess it is really difficuly because you dont get it... they would not be the same!!!!

the offset would be the same but the clearance would be completely differnt!!!![/quote]

Thank you.

Mystikal, really think about... wheels with a lower offset tend to have more "dish" because the spokes are further in from the outside edge of the wheel, while higher offset wheels have less. How many deep dish wheels do you see on honda civics?

[BeirBrennerE30]

How many deep dish wheels do you see on honda civics?

thats a good point!!!

[drifty30]

go go thread jack. Start a new one entitled "Offset:brake clearance:: Spacers:dish" and call it a day on this one.

We're not even talking about brakes anymore.

If its of any help, my buddy did a five lug conversion on his Nissan and got all the custom brake stuff done for a bout 1500$

That includes 400$ for the calipers and pads (used porsche 996 brembo 4 pots)
New rotors slotted Supra TT fronts in front and 300zxTT rears in the rear. The brake setup works well. BUT!!!! he still needs a new master cylinder and definately a bias valve.