Group buy: 2pc wortec rotors for steel super brakes on f-type
#81
What's your ZIP Code?
1. Gibbo205 - Round disc, drilled only - UK
2. Unhingd - Standard Suncut disc, drilled slots - US 20904
3. F-Type-Type - Round disc, drilled slots - Denmark 2820
4. zmoothg - Standard Suncut disc, drilled slots- US 94103
5. IronMike - Round or Std. Suncut (undecided), drilled slots - US 92627
6. Chawumba - Round Disc, drilled only (or 2nd choice drilled slots) - US 90803
7. Vettegood - Round Disc, Drilled Slots - US 85086
8. Dremorg - Round Disc, Drilled Slots - US ?????
9.
10.
1. Round disc, drilled only (2)
2. Round disc, drilled slots (3 or 4)
3. Standard suncut disc, drilled slots (3 or 2)
1. Gibbo205 - Round disc, drilled only - UK
2. Unhingd - Standard Suncut disc, drilled slots - US 20904
3. F-Type-Type - Round disc, drilled slots - Denmark 2820
4. zmoothg - Standard Suncut disc, drilled slots- US 94103
5. IronMike - Round or Std. Suncut (undecided), drilled slots - US 92627
6. Chawumba - Round Disc, drilled only (or 2nd choice drilled slots) - US 90803
7. Vettegood - Round Disc, Drilled Slots - US 85086
8. Dremorg - Round Disc, Drilled Slots - US ?????
9.
10.
1. Round disc, drilled only (2)
2. Round disc, drilled slots (3 or 4)
3. Standard suncut disc, drilled slots (3 or 2)
Last edited by Unhingd; 03-03-2018 at 09:20 AM.
#82
Yep, that's how it works on most cars, but it appears on modern Jags it is the other way 'round, with the rears wearing out much faster than the fronts.
The main reason is the "anti-dive" built into the braking system which applies the rears earlier and harder than the fronts, and the secondary reason is the way the parking brake operates.
Lots of reports on the XF and XJ forums on this, just a little early yet to report anything conclusive on the F-Type.
The main reason is the "anti-dive" built into the braking system which applies the rears earlier and harder than the fronts, and the secondary reason is the way the parking brake operates.
Lots of reports on the XF and XJ forums on this, just a little early yet to report anything conclusive on the F-Type.
Looks like the rears are considerably thinner disks too @ 25.9mm vs the fronts @35.8mm if the spec I saw is accurate.
Last edited by mshedden; 03-03-2018 at 09:25 AM.
#83
#84
OK. I'm in.
9. lizzardo - Std. Suncut, slotted only, (2nd choice drilled slots) - US 94526
I'll second Lance's comment about slotted. I moved to slotted on my previous car and did not notice any increase in pad wear. I didn't notice any increase in bite either, but I also changed pad compound, so both observations should be taken in light of that.
1. Gibbo205 - Round disc, drilled only - UK
2. Unhingd - Standard Suncut disc, drilled slots - US 20904
3. F-Type-Type - Round disc, drilled slots - Denmark 2820
4. zmoothg - Standard Suncut disc, drilled slots- US 94103
5. IronMike - Round or Std. Suncut (undecided), drilled slots - US 92627
6. Chawumba - Round Disc, drilled only (or 2nd choice drilled slots) - US 90803
7. Vettegood - Round Disc, Drilled Slots - US 85086
8. Dremorg - Round Disc, Drilled Slots - US ?????
2. Unhingd - Standard Suncut disc, drilled slots - US 20904
3. F-Type-Type - Round disc, drilled slots - Denmark 2820
4. zmoothg - Standard Suncut disc, drilled slots- US 94103
5. IronMike - Round or Std. Suncut (undecided), drilled slots - US 92627
6. Chawumba - Round Disc, drilled only (or 2nd choice drilled slots) - US 90803
7. Vettegood - Round Disc, Drilled Slots - US 85086
8. Dremorg - Round Disc, Drilled Slots - US ?????
I'll second Lance's comment about slotted. I moved to slotted on my previous car and did not notice any increase in pad wear. I didn't notice any increase in bite either, but I also changed pad compound, so both observations should be taken in light of that.
#85
I noticed no change in wear rate when I moved to slotted rotors on my MINI. That car only weighs 2600 lbs, but the discs are half the size of the Jag's, so just maybe a valid comparison.
1. Gibbo205 - Round disc, drilled only - UK
2. Unhingd - Standard Suncut disc, drilled slots - US 20904
3. F-Type-Type - Round disc, drilled slots - Denmark 2820
4. zmoothg - Standard Suncut disc, drilled slots- US 94103
5. IronMike - Round or Std. Suncut (undecided), drilled slots - US 92627
6. Chawumba - Suncut, drilled/slots - US 90803
7. Vettegood - Round Disc, Drilled Slots - US 85086
8.
Based on the above, it looks like we need to limit this group buy to the following 3 options:
1. Round disc, drilled only (1)
2. Round disc, drilled slots (2 or 3)
3. Standard suncut disc, drilled slots (3 or 4)
Can everyone live with that offering?
I will check on the cost of the replacement discs. I suspect they are a fraction of the cost of the 'hat'.
1. Gibbo205 - Round disc, drilled only - UK
2. Unhingd - Standard Suncut disc, drilled slots - US 20904
3. F-Type-Type - Round disc, drilled slots - Denmark 2820
4. zmoothg - Standard Suncut disc, drilled slots- US 94103
5. IronMike - Round or Std. Suncut (undecided), drilled slots - US 92627
6. Chawumba - Suncut, drilled/slots - US 90803
7. Vettegood - Round Disc, Drilled Slots - US 85086
8.
Based on the above, it looks like we need to limit this group buy to the following 3 options:
1. Round disc, drilled only (1)
2. Round disc, drilled slots (2 or 3)
3. Standard suncut disc, drilled slots (3 or 4)
Can everyone live with that offering?
I will check on the cost of the replacement discs. I suspect they are a fraction of the cost of the 'hat'.
Not to create more work, but after getting input from my son, we'll join the suncut crowd. May also be interested in replacement discs. Thanks for taking point on this for the USA Unhinged, and to the OP for finding this great option.
#87
Here to (hopefully not) create additional confusion are Wortec's recommendations:
I had already settled on his recommended option before he offered it.
Here's where it now stands:
1. Gibbo205 - Plain disc, drilled only - UK
2. Unhingd - Low Profile Suncut disc, thermal slots - US 20904
3. F-Type-Type - Plain disc, thermal slots - Denmark 2820
4. zmoothg - Low Profile Suncut disc, thermal slots- US 94103
5. IronMike - Plain or Low Profile Suncut (undecided), thermal slots - US 92627
6. Chawumba - Low Profile Suncut Disc, thermal slots - US 90803
7. Vettegood - Plain Disc, Thermal Slots - US 85086
8. Dremorg - Plain Disc, thermal Slots - US ?????
9. lizzardo - Low Profile Suncut, slotted only, (2nd choice thermal slots) - US 94526
10.
1. Plain disc, drilled only (1)
2. Plain disc, thermal slots (3 or 4)
3. Low Profile Suncut disc, thermal slots (4 or 3)
4. Low Profile Suncut disc, slots only (1) (option 3 would be a second choice)
Let us know if you have changed your mind on your selected options based on Paul's description above). I will re-tabulate and see where we're at.
Here are the official terms:
plain disc
low profile suncut disc
aggressive suncut disc
slots only
drilled only
thermal slots (drilled slots)
We will try to keep within 3 configurations, but given that we now have more than the minimum five buyers, Paul might be open to allowing up to 4 options.
Paul@Wortec
1. Daily driver veryoccasionally used on track day (5-10 lap sessions with cool down or 20mins):
Drilled rotor with plain edge Or Drilled rotor with low profile suncut
2. Daily driver, with fast Road use and track day (5-10 lap sessions with cooldown or 20mins):
Thermal slot (drilled slots) plain edge OrThermal slot (drilled slots) low profile suncut
3. Predominantly track day use (occasional road use) (5-10 lap sessions withcool down or 20 mins):
Drilled with aggressive suncut edge Or Thermal slot with aggressive suncut
Standard calipers will always be your limit as their clamping force is verylow. They will need to be applied for longer than multi piston calipers andthis will build heat........our rotors will stay cooler and help stave offfade.
If it was my car Iwould be no 2 and have the thermal slot (drilled slots) and low profile suncut........very goodheat dissipation and good looks.
1. Daily driver veryoccasionally used on track day (5-10 lap sessions with cool down or 20mins):
Drilled rotor with plain edge Or Drilled rotor with low profile suncut
2. Daily driver, with fast Road use and track day (5-10 lap sessions with cooldown or 20mins):
Thermal slot (drilled slots) plain edge OrThermal slot (drilled slots) low profile suncut
3. Predominantly track day use (occasional road use) (5-10 lap sessions withcool down or 20 mins):
Drilled with aggressive suncut edge Or Thermal slot with aggressive suncut
Standard calipers will always be your limit as their clamping force is verylow. They will need to be applied for longer than multi piston calipers andthis will build heat........our rotors will stay cooler and help stave offfade.
If it was my car Iwould be no 2 and have the thermal slot (drilled slots) and low profile suncut........very goodheat dissipation and good looks.
Here's where it now stands:
1. Gibbo205 - Plain disc, drilled only - UK
2. Unhingd - Low Profile Suncut disc, thermal slots - US 20904
3. F-Type-Type - Plain disc, thermal slots - Denmark 2820
4. zmoothg - Low Profile Suncut disc, thermal slots- US 94103
5. IronMike - Plain or Low Profile Suncut (undecided), thermal slots - US 92627
6. Chawumba - Low Profile Suncut Disc, thermal slots - US 90803
7. Vettegood - Plain Disc, Thermal Slots - US 85086
8. Dremorg - Plain Disc, thermal Slots - US ?????
9. lizzardo - Low Profile Suncut, slotted only, (2nd choice thermal slots) - US 94526
10.
1. Plain disc, drilled only (1)
2. Plain disc, thermal slots (3 or 4)
3. Low Profile Suncut disc, thermal slots (4 or 3)
4. Low Profile Suncut disc, slots only (1) (option 3 would be a second choice)
Let us know if you have changed your mind on your selected options based on Paul's description above). I will re-tabulate and see where we're at.
Here are the official terms:
plain disc
low profile suncut disc
aggressive suncut disc
slots only
drilled only
thermal slots (drilled slots)
We will try to keep within 3 configurations, but given that we now have more than the minimum five buyers, Paul might be open to allowing up to 4 options.
Last edited by Unhingd; 03-03-2018 at 11:41 AM.
#88
#89
Unhinged, to be honest i don't really know what i want!
i am not very knowledgeable about brakes. I just want a brake rotor that is as good as it gets safety wise and longevity and looks really good!
i would be grateful for your or any suggestion.
my first thought would be round grooved and slotted like the picture you have back about 10 posting ago. i have never seen this suncut before what does it look like installed any advantages to this style?
I like things that are different than others have, as well.
Thanks for your thoughts.
Mitchell
i am not very knowledgeable about brakes. I just want a brake rotor that is as good as it gets safety wise and longevity and looks really good!
i would be grateful for your or any suggestion.
my first thought would be round grooved and slotted like the picture you have back about 10 posting ago. i have never seen this suncut before what does it look like installed any advantages to this style?
I like things that are different than others have, as well.
Thanks for your thoughts.
Mitchell
#90
The main reason for this is to get the weight savings of ceramics.
#91
+1.
#92
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Unhingd (03-03-2018)
#93
#95
I get that, but for someone thats just doing it for looks does the weight savings really make a difference. I can see making it lighter for the track but for driving on the street it seems like a waste, but its your money.
#96
That was certainly the case when I responded, but I'm sure you're aware of that :/
Many are likely doing this for reasons of aesthetics, but reducing unsprung weight is never a bad thing. The suspension can do its job better. If you can reduce rotational inertia too, not just static weight, you'd even see better acceleration. I don't think we'll see much difference with these in that respect though, since the weight reduction is primarily close to the rotational axis.
Many are likely doing this for reasons of aesthetics, but reducing unsprung weight is never a bad thing. The suspension can do its job better. If you can reduce rotational inertia too, not just static weight, you'd even see better acceleration. I don't think we'll see much difference with these in that respect though, since the weight reduction is primarily close to the rotational axis.
#97
That was certainly the case when I responded, but I'm sure you're aware of that :/
Many are likely doing this for reasons of aesthetics, but reducing unsprung weight is never a bad thing. The suspension can do its job better. If you can reduce rotational inertia too, not just static weight, you'd even see better acceleration. I don't think we'll see much difference with these in that respect though, since the weight reduction is primarily close to the rotational axis.
Many are likely doing this for reasons of aesthetics, but reducing unsprung weight is never a bad thing. The suspension can do its job better. If you can reduce rotational inertia too, not just static weight, you'd even see better acceleration. I don't think we'll see much difference with these in that respect though, since the weight reduction is primarily close to the rotational axis.
#98
I suspect it results in a huge benefit for the average driver. Reducing the unsprung weight by 5kg at each corner should significantly smooth and quiet the ride over rough/irregular surfaces.
Last edited by Unhingd; 03-04-2018 at 08:48 AM.
#99
The rotational mass is far less an issue than the unsprung weight. Reducing that weight allows the suspension to react to the surface much more quickly in the vertical plane, reducing the reliance on tire deflection to absorb the shock.
I suspect it results in a huge benefit for the average driver. Reducing the unsprung weight by 5kg at each corner should significantly smooth and quiet the ride over rough/irregular surfaces.
I suspect it results in a huge benefit for the average driver. Reducing the unsprung weight by 5kg at each corner should significantly smooth and quiet the ride over rough/irregular surfaces.
#100
That part - cumulative effect of removing 100 lbs of unsprung weight with forged wheels and calipers (25 lbs per corner) has to be of noticeable benefit. My goal is to get my 3850 lbs "sports car" to 3650 lbs, so it can compete with my 4 door sports car M3 around corners. Can't hurt acceleration either, right?
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F-Type-Type (03-04-2018)