@AshDVS I've really only noticed it when the pads are stone cold first thing in the morning. I'd say after slowing from 50 down to a roll maybe twice, the pads have reached 90+% of what they're like after 20 minutes of spirited downhill driving.
James's 1996 850R "Minty"
Friction coefficient, even when cold, is better than the typical ATE oem compounds.
I'd think that the difference between stone to even 'warm' is noticeable, which you dont experience with such variation in an oem style pad.
For the nerdy, I'll post up the differences in both QFM compounds mentioned and the two PMU compounds mentioned later tonight - I've put together a little blurb on each that I forward out to customers.
I'd think that the difference between stone to even 'warm' is noticeable, which you dont experience with such variation in an oem style pad.
For the nerdy, I'll post up the differences in both QFM compounds mentioned and the two PMU compounds mentioned later tonight - I've put together a little blurb on each that I forward out to customers.
Here's a bit more info on the Project Mu and QFM pads we've been talking about
PMU NS400 -
Friction coefficient - 0.37～0.40μ
Rotor temp rage - 0～400℃
They are a good performance road pad, and are good for the occasional track day etc.
Low dust, fairly good on rotors. In a light weight car, they’re actually pretty good for supersprints, etc.
PMU HC800 -
Friction coefficient - 0.38～0.62μ
Rotor temp rage - 0～800℃
These are a very good high performance road and entry level track pad. Very good for track days with excellent bite from both cold and hot. Good for tarmac rallying stuff and great for circuit racing in light weight cars.
A bit harder on rotors than the NS400 and almost as good cold bit, while having a broader operating range and excellent bite when very hot.
QFM HP-X
Friction coefficient: 0.43～0.41μ
Rotor temp range: 0 – 550 deg C
(cold to hot, ie. They fall away a little in bite when approaching max temp)
Material: Low metal content, organic
They are a good performance road pad, particularly at the price point, and are good for the occasional track day etc.
The PMU NS400 and QFM HP-X are quite comparable and the PMU HC800 and QFM A1RM are both higher Performance pads that you might use for light track day work or tarmac rallying. We have some more aggressive and motorsport compounds we can offer too but, you wouldn’t go near them unless you’re doing real circuit racing rather than an occasional club day or supersprint.
QFM A1RM -
Friction coefficient - 0.40～0.48μ
Rotor temp rage - 0～780℃
These fit somewhere between the PMU NS400 and HC800 pads.
Still quite capable as a track day pad too. Low metal content. Better cold bite than either of the PMU options above but hot bite isn’t as good as the HC800.
Quite popular as a track day pad.
PMU NS400 -
Friction coefficient - 0.37～0.40μ
Rotor temp rage - 0～400℃
They are a good performance road pad, and are good for the occasional track day etc.
Low dust, fairly good on rotors. In a light weight car, they’re actually pretty good for supersprints, etc.
PMU HC800 -
Friction coefficient - 0.38～0.62μ
Rotor temp rage - 0～800℃
These are a very good high performance road and entry level track pad. Very good for track days with excellent bite from both cold and hot. Good for tarmac rallying stuff and great for circuit racing in light weight cars.
A bit harder on rotors than the NS400 and almost as good cold bit, while having a broader operating range and excellent bite when very hot.
QFM HP-X
Friction coefficient: 0.43～0.41μ
Rotor temp range: 0 – 550 deg C
(cold to hot, ie. They fall away a little in bite when approaching max temp)
Material: Low metal content, organic
They are a good performance road pad, particularly at the price point, and are good for the occasional track day etc.
The PMU NS400 and QFM HP-X are quite comparable and the PMU HC800 and QFM A1RM are both higher Performance pads that you might use for light track day work or tarmac rallying. We have some more aggressive and motorsport compounds we can offer too but, you wouldn’t go near them unless you’re doing real circuit racing rather than an occasional club day or supersprint.
QFM A1RM -
Friction coefficient - 0.40～0.48μ
Rotor temp rage - 0～780℃
These fit somewhere between the PMU NS400 and HC800 pads.
Still quite capable as a track day pad too. Low metal content. Better cold bite than either of the PMU options above but hot bite isn’t as good as the HC800.
Quite popular as a track day pad.
2 months later
I finally paid off my loan, and I felt good about it, so I bought something I'd always wanted, an IPD pod filter kit.
6 days later
Boom! Looks cool. If you're thinking of buying the kit from IPD, it was a fairly easy install, fitment is good, only thing I did not on the guide was to file the little breakaway tabs as they leave little pointy bits when you remove them. Found a vac leak while I had everything apart too!
Does the IPD version run the factory intake snorkel?
@AshDVS yes, you can juuust see where it comes in behind the filter in that photo.
a month later
I put some Dynamat on the front doors today. Once again my impression is that it is more or less witchcraft, the stereo sounds much better, clearer, crisper bass tones, and no more vibrations. Still need to do the rear doors.
Nice!
I used some generic stuff, doesn't take much to make big difference!
Still using stock speakers?
Am going with Focal splits when I get to it...
3 amps maybe, JL Audio.
Mount a sub in wheel well maybe, fabricate a thing there.
My project V70R R even has tar everywhere, I nabbed under carpet dampner layer from another wagon and have double. A bit of carpet wrinkle but it will settle in.
Grabbed Dynaudio tweets and front door bass from c70. Will be the back door and rear pillar.
C70 mid bass dome cone I really want to hear, hard to get not flattened!
I used some generic stuff, doesn't take much to make big difference!
Still using stock speakers?
Am going with Focal splits when I get to it...
3 amps maybe, JL Audio.
Mount a sub in wheel well maybe, fabricate a thing there.
My project V70R R even has tar everywhere, I nabbed under carpet dampner layer from another wagon and have double. A bit of carpet wrinkle but it will settle in.
Grabbed Dynaudio tweets and front door bass from c70. Will be the back door and rear pillar.
C70 mid bass dome cone I really want to hear, hard to get not flattened!
Stock front speakers and some random rear door speakers. Front tweeters are blown and disconnected, rears are missing. On my to do list is find a tweeter that will fit the factory bracket.
C70 ones, premium Dynaudio ones are same.
Whats dynamat cost these days?
a month later
Well that explains the flutter. Pinhole in the CBV diaphragm.
Same issue with mine.
- Edited
I ticked off a backlog project today. I separated the speaker grills from their plastic chassis, and added a double layer of speaker cloth. Now the chassis doesn't rattle against the mesh, and you can't see the speakers behind the grilles, which I like.
Before:
After:
Took about 90 minutes all up.
Before:
After:
Took about 90 minutes all up.
a month later
Hi @jamesinc I note you did the big brake upgrade was it worth the effort?
@jamesinc been a good read, thanks
@nickm yeah, I needed to do the fronts anyway and the additional cost of the upgrade isn't huge, but having done it I've never noticed any kind of fade.
a month later
Laaaame
ABS ECU would be my guess.