Brembos, but keeping 4 stud?

[EvoOne]

Gents,
Whilst looking at instagram evo pics last night, I noticed there was a car in Japan running Brembos, but having retained 4 stud set up. Can someone explain how that is different to the 5 stud in the sticky?

Thanks!

 

[evo-gsr]

one has 4 wheel nuts the other has 5?

 

[evo-gsr]

Would need some kind of adaptor brackets one would think if its still standard front hubs?
Which over here brings up legality issues.
Would need at least 17" wheels to fit over them too.

 

[ENGINR]

You can run Brembos and maintain 4-stud. It will require an adaptor bracket to pick up the caliper mounting points on the original upright and the points on the caliper. To make it strictly legal you would probably need to have proof the brackets were engineered to withstand the required loads.

Main benefits of going 5-stud when doing the conversion are:
You can use the 5-stud uprights which guarantee the calipers will bolt straight up without needing adaptor brackets etc;
Guaranteed that you can use EVO5-6 rims which will clear the calipers;

Todd (runuts) has a set of Enkei Tarmac 4-studs that he really wanted to use on his EVO3 and is running a custom adaptor setup to mount up a set of big Wilwood calipers.

So hard and fast rule that you MUST go 5-stud when doing Brembos, it's just less of a hassle.

 

[EvoOne]

You can run Brembos and maintain 4-stud. It will require an adaptor bracket to pick up the caliper mounting points on the original upright and the points on the caliper. To make it strictly legal you would probably need to have proof the brackets were engineered to withstand the required loads.

Main benefits of going 5-stud when doing the conversion are:
You can use the 5-stud uprights which guarantee the calipers will bolt straight up without needing adaptor brackets etc;
Guaranteed that you can use EVO5-6 rims which will clear the calipers;

Todd (runuts) has a set of Enkei Tarmac 4-studs that he really wanted to use on his EVO3 and is running a custom adaptor setup to mount up a set of big Wilwood calipers.

So hard and fast rule that you MUST go 5-stud when doing Brembos, it's just less of a hassle.

Thanks Enginr (and also evo-gsr) for this great explanation.

My main obstacle is my 4 stud collection. That said, financially I'm probably better off liquidating these and just buying common 5 stud wheels!!!

 

[Hypo]

If you wanted couldn't you just press the EVO III stub back into the EVO V hub to go back to 4 stud?

 

[EV0300]

^yeah i thought that was the go

 

[EvoOne]

Plot thickens. Thats for the info guys.

Does anyone know if you need a different offset to ensure the caliper fit (noting wheels need to be 17s)?

Yes I really do need Brembos to drive to the shops

 

[ENGINR]

Brembos require the rims to have the right offset but also what has been called the "X-Factor" which is how much clearance the rim design gives to the caliper.

 

[khubner1]

i know i've lookthis up and the evo 4 wheel bearing kit is the same as evo 3 wheel bearing kit so yes you can use evo 3 hub/splines with 4 studs in an evo 4 set of uprights

 

[unhuman]

Yes I am running four stud with Brembos.

I have the Evo V LCA and hub carrier as I wasn't comfortable with using an adapter for the caliper, with the original GSR hub pressed in.

The GSR hub does need to be machined as it is longer than the Evo V one, when I first had it pressed in the hub wouldn't seat correctly and thus the caliper didn't line up with the disc.

You are unlikely to find many four stud wheels with an offset to clear Brembos, I am using 20mm spacers in order to clear with my Tarmac Evos.

I did this because:

a. I only want to run Tarmac Evos, so if I went five stud then I would then need to find five stud Tarmac Evos

b. I wasn't sure how easy (or if possible) it would be to convert the Libero live axle to five stud

Converting to five stud would be the correct way for most people, however there are certain circumstances when remaining four stud is the ideal solution.

 

[ENGINR]

Nice bleeder kit. Does that require pedal pumps or can it all be done outside the car by one person?

 

[EvoOne]

Thanks again guys for the additional information!

 

[evo-gsr]

I knew it wouldnt be as easy as just pressing e3/gsr hubs into the later knuckles. I just couldnt remember the details.
Thanks for the clarification unhuman.

 

[evo-gsr]

i know i've lookthis up and the evo 4 wheel bearing kit is the same as evo 3 wheel bearing kit so yes you can use evo 3 hub/splines with 4 studs in an evo 4 set of uprights

Lol.

 

[unhuman]

Nice bleeder kit. Does that require pedal pumps or can it all be done outside the car by one person?

I built my own pressure bleeder from a garden weed sprayer. So once thats hooked up I just crack open the bleeder valve the let the pressure do the work.

Takes longer to jack the car up and get the wheels off than to bleed all four brakes and MC!

 

[unhuman]

I should add something else to consider is that the discs need to be re-drilled to four stud. So I would not recommend this setup for a track car that will be chewing through discs as this would get annoying.

For a weekend only street car though, not really a problem.

 

[EV0300]

Nice bleeder kit. Does that require pedal pumps or can it all be done outside the car by one person?

Looks like the el cheap general one. Has a one way valve so you hook it up and pump the pedal until the bubbles are gone. Works well.

 

[khubner1]

Never said it was as simple as press out old press in new just said bearing kit has the same part number

 

[evo-gsr]

Incorrect again....if you read what you posted you will see it actually says and I qoute

"so yes you can use evo 3 hub/splines with 4 studs in an evo 4 set of uprights"