Obioban's 2005 IR/IR Coupe

[Obioban]

Clear, thanks. Which kits are you referring to here? To that I mean, which ones do you have this experience with?

The rotor and pad selection are the same regardless of kit, but I have ST40s.

I also once tried stoptech rotors on the M3's Brembo BBK, because they're half the price... and they lasted ~1/4 as long as the Brembo rotors.

I don't know which 6 piston setup my friend had with the terrifying knockback, but it was bad enough that he sold them and replaced them with an AP Racing BBK.

[Albino09]

-There's no actually great street pad options-- just various levels of meh.
-The rotors last 1/2-1/4 as long as the brembo rotors
-the finish on the calipers fades and looks like crap quickly
-the 6 piston setups have scary levels of pad knock back.
-the seals go bad ~5x as fast as the brembo seals, resulting in the need for many more caliper rebuilds.

Clear, thanks. Which kits are you referring to here? To that I mean, which ones do you have this experience with?

[Obioban]

Can you elaborate on what you mean by that? Do they fade? Make a bunch of noise? Crappy feel? Stoptech offers many new "Grades" of kits (Trophy, Race, etc) so I'm curious where they are lacking.

-There's no actually great street pad options-- just various levels of meh.
-The rotors last 1/2-1/4 as long as the brembo rotors
-the finish on the calipers fades and looks like crap quickly
-the 6 piston setups have scary levels of pad knock back.
-the seals go bad ~5x as fast as the brembo seals, resulting in the need for many more caliper rebuilds.

[Albino09]

I have stoptechs on the m5, and they’re junk. IMO people that think they’re good have never had a good bbk to compare to.

Can you elaborate on what you mean by that? Do they fade? Make a bunch of noise? Crappy feel? Stoptech offers many new "Grades" of kits (Trophy, Race, etc) so I'm curious where they are lacking.

[Obioban]

Any luck on finding 17s that will clear your brakes? I noticed that Stoptech claims their 332mm kits will fit 17s (I feel like you never know until they are in hand). I hate to say it since I have no first hand experience, but I feel like for every person I hear say they love their stoptechs, I hear someone have a complaint. Brakes are an area I'd rather be 100% sure...

I have stoptechs on the m5, and they’re junk. IMO people that think they’re good have never had a good bbk to compare to.

[loudspeaker69]

Interesting. 125k on mine, so I think it could use a refresh. Now I want to drive a higher mileage car with a refreshed diff to see what that feels like.



That's good to hear.

And maybe "extra notchy" is not the best way to describe it. What I'm talking about is the feeling that happens when you try to switch gears fast and don't let the drivetrain "settle". The shifter becomes harder to push into the gate and when it finally does go in, you can feel the drivetrain clunking through the shifter. Doesn't happen on every fast gear change, but it happens often enough to be annoying.

I think you both have convinced me to start planning a diff refresh. Need to spend some time deciding what I want on the car first though.

I feel the same.
Lots of diff clunk (and through the shifter) when the diff is torqued to spec and using the current/correct bolts and the driveline is all updated in the last 20k miles.

Hence, I was interested in Ian’s choice of the Wavetrack just for having a better diff and eliminating the clunk.

[blazenXLT]

Any luck on finding 17s that will clear your brakes? I noticed that Stoptech claims their 332mm kits will fit 17s (I feel like you never know until they are in hand). I hate to say it since I have no first hand experience, but I feel like for every person I hear say they love their stoptechs, I hear someone have a complaint. Brakes are an area I'd rather be 100% sure...

[heinzboehmer]

Is your CSB replaced? I'd do that first, if not.

Yup, all bushings on the car have been replaced under my ownership.

Might be worth going over everything before diving into a diff replacement though.

[Obioban]

Interesting. 125k on mine, so I think it could use a refresh. Now I want to drive a higher mileage car with a refreshed diff to see what that feels like.



That's good to hear.

And maybe "extra notchy" is not the best way to describe it. What I'm talking about is the feeling that happens when you try to switch gears fast and don't let the drivetrain "settle". The shifter becomes harder to push into the gate and when it finally does go in, you can feel the drivetrain clunking through the shifter. Doesn't happen on every fast gear change, but it happens often enough to be annoying.

I think you both have convinced me to start planning a diff refresh. Need to spend some time deciding what I want on the car first though.

Is your CSB replaced? I'd do that first, if not.

[heinzboehmer]

When I swapped in my rebuilt 3.91 diff from diffs online last winter I can say almost all my clunk vanished. Shifts are much smoother now (however I'm in SMG), will be interesting to see how long that lasts. I had 100k on my original diff. I know this is Obi's thread but thought interesting enough to share.

Interesting. 125k on mine, so I think it could use a refresh. Now I want to drive a higher mileage car with a refreshed diff to see what that feels like.

Hmm.

I suppose I know what you mean-- you can feel the M clunk in the shifter. I do not, anymore.

I don't think I've ever noticed it correlating with extra notchy shifts, so I can't say I feel like that is reduced.

That's good to hear.

And maybe "extra notchy" is not the best way to describe it. What I'm talking about is the feeling that happens when you try to switch gears fast and don't let the drivetrain "settle". The shifter becomes harder to push into the gate and when it finally does go in, you can feel the drivetrain clunking through the shifter. Doesn't happen on every fast gear change, but it happens often enough to be annoying.

I think you both have convinced me to start planning a diff refresh. Need to spend some time deciding what I want on the car first though.

[Obioban]

Saw you say on another thread that the wavetrac diff is quieter than stock since there's no m clunk. Have you noticed any differences in shift feel with the new diff?

I ask cause I was driving around with the back seats down the other day and I could hear the diff clunking away pretty clearly. The clunks correlated with that extra notchy feeling that sometimes happens when switching gears (almost as if the whole drivetrain is loaded up and needs to unbind before the gear can be selected).

I'm starting to think that most of the gripes I have with how my transmission feels are due to my diff. Actually, I remember there was a noticeable improvement in shift feel when I swapped out the diff fluid right after buying my car.

Hmm.

I suppose I know what you mean-- you can feel the M clunk in the shifter. I do not, anymore.

I don't think I've ever noticed it correlating with extra notchy shifts, so I can't say I feel like that is reduced.

[oceansize]

Saw you say on another thread that the wavetrac diff is quieter than stock since there's no m clunk. Have you noticed any differences in shift feel with the new diff?

I ask cause I was driving around with the back seats down the other day and I could hear the diff clunking away pretty clearly. The clunks correlated with that extra notchy feeling that sometimes happens when switching gears (almost as if the whole drivetrain is loaded up and needs to unbind before the gear can be selected).

I'm starting to think that most of the gripes I have with how my transmission feels are due to my diff. Actually, I remember there was a noticeable improvement in shift feel when I swapped out the diff fluid right after buying my car.

When I swapped in my rebuilt 3.91 diff from diffs online last winter I can say almost all my clunk vanished. Shifts are much smoother now (however I'm in SMG), will be interesting to see how long that lasts. I had 100k on my original diff. I know this is Obi's thread but thought interesting enough to share.

[heinzboehmer]

Street review of wavetrac: indistinguishable from stock.

Saw you say on another thread that the wavetrac diff is quieter than stock since there's no m clunk. Have you noticed any differences in shift feel with the new diff?

I ask cause I was driving around with the back seats down the other day and I could hear the diff clunking away pretty clearly. The clunks correlated with that extra notchy feeling that sometimes happens when switching gears (almost as if the whole drivetrain is loaded up and needs to unbind before the gear can be selected).

I'm starting to think that most of the gripes I have with how my transmission feels are due to my diff. Actually, I remember there was a noticeable improvement in shift feel when I swapped out the diff fluid right after buying my car.

[Tonggi]

Larger screen Avin installed:

What avin model is this? I cant find it on their site

Edit, found it

https://avinusa.com/8-8-multimedia-n...x69088e46.html

man that is sexy looks a lot better than Avin Avant 4 that has a lot of buttons i dont really need

[Malloy]

Yes. My brother has the 0% in his car, and it is perfection.

Thanks again. I talked to Ronald the other day and I'm sold. He pushed me twd a 20% reduction so I need to decide. Either way, I can't wait to get his parts :-)