Wheels and brakes
08-20-2001, 02:36 PM
#1
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Wheels and brakes
I have a 2000 Boxter (non S) and like to do driver
ed's events and posible getting into some light
racing. The first things that I was considering was
to get another set of wheels with racing tires and
upgrade the brakes.
1. I have been offered at a good price a set of 996
17" wheels. They seem to have an offset of 55.
Should i buy them insted of getting a set of 17"
boxter wheels? If i go for the 996 do i need a set of
spacers for the back, and what size?
2. As for the brake rotors, some people are telling me
to get a set of frozen rotors, would you recomend
them? If yes, should i get the sloted rotors or the
normal ones? or just keep the original Porsche rotors?
At my last event in Homestead under hard braking i had
the steering wheel vibrate without the abs beeing
present. I have not beeeing able to replicate this
situation during normal street driving conditions.
What are your thoughts on this one.
3. Now for brake pads, what would be your suggestions
both if i would like to use the same pad for street
and race conditions as well as if i get pads for just
racing.
Thank you very much in advance for your help,
Marc
marchoff@yahoo.com
ed's events and posible getting into some light
racing. The first things that I was considering was
to get another set of wheels with racing tires and
upgrade the brakes.
1. I have been offered at a good price a set of 996
17" wheels. They seem to have an offset of 55.
Should i buy them insted of getting a set of 17"
boxter wheels? If i go for the 996 do i need a set of
spacers for the back, and what size?
2. As for the brake rotors, some people are telling me
to get a set of frozen rotors, would you recomend
them? If yes, should i get the sloted rotors or the
normal ones? or just keep the original Porsche rotors?
At my last event in Homestead under hard braking i had
the steering wheel vibrate without the abs beeing
present. I have not beeeing able to replicate this
situation during normal street driving conditions.
What are your thoughts on this one.
3. Now for brake pads, what would be your suggestions
both if i would like to use the same pad for street
and race conditions as well as if i get pads for just
racing.
Thank you very much in advance for your help,
Marc
marchoff@yahoo.com
08-20-2001, 09:07 PM
#2
Technical Specialist
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Marc,
I'm not familiar enough with the Boxster and 996 wheel interchangability, so I'll pass on that. However, it does make sense to have a second set of wheels with R-compound rubber. R-compound tires are DOT approved, so you can use them to drive to your events. R-compound tires are stickier, so they don't last as long as street tires. Some popular R-compound tires, in no particular order, are Kumho V700's, Toyo Proxes RA-1, Pirelli PZero-C, Yokohama A032, and Michelin should have their cup tire out in the spring (hope, hope).
Some people swear by frozen rotors, and I haven't known anyone to swear at them. I have them on my rear turbo rotors, as they are Porsche with cast-in holes, and I wanted to see if that would help delay the cracks-between-the-holes that eventually comes up. Some racer's I know use them too. I'd probably go with non-frozen until you have a reason to use them. The pulsating on your rotors may have been due to your pads depositing material on the face of the rotor. Only happens at hot temps and the deposits wear off after awhile. Pagids are known to do this. However, on my front rotors, I've either had ATE Powerdiscs with slots or VCI rotors with slots. I believe the slots go a long way to preventing Pagids from deposting pad material on the rotor.
As far as pads, I really like the Pagid orange pads on the track. I'd use them on the street too, but they squeeeeeeeeel unmercifully, so I don't use them on the street. Great track pad, however. (They were fine when I had the single piston per caliper, but with the dual piston per side they make too much noise). Some people like to use Axxis Metal masters for street and track, and if Performance Friction makes their "Z Rated" pads for the Boxster, that is an excellent dual purpose compound. Hawk also makes some dual purpose pads.
I'm not familiar enough with the Boxster and 996 wheel interchangability, so I'll pass on that. However, it does make sense to have a second set of wheels with R-compound rubber. R-compound tires are DOT approved, so you can use them to drive to your events. R-compound tires are stickier, so they don't last as long as street tires. Some popular R-compound tires, in no particular order, are Kumho V700's, Toyo Proxes RA-1, Pirelli PZero-C, Yokohama A032, and Michelin should have their cup tire out in the spring (hope, hope).
Some people swear by frozen rotors, and I haven't known anyone to swear at them. I have them on my rear turbo rotors, as they are Porsche with cast-in holes, and I wanted to see if that would help delay the cracks-between-the-holes that eventually comes up. Some racer's I know use them too. I'd probably go with non-frozen until you have a reason to use them. The pulsating on your rotors may have been due to your pads depositing material on the face of the rotor. Only happens at hot temps and the deposits wear off after awhile. Pagids are known to do this. However, on my front rotors, I've either had ATE Powerdiscs with slots or VCI rotors with slots. I believe the slots go a long way to preventing Pagids from deposting pad material on the rotor.
As far as pads, I really like the Pagid orange pads on the track. I'd use them on the street too, but they squeeeeeeeeel unmercifully, so I don't use them on the street. Great track pad, however. (They were fine when I had the single piston per caliper, but with the dual piston per side they make too much noise). Some people like to use Axxis Metal masters for street and track, and if Performance Friction makes their "Z Rated" pads for the Boxster, that is an excellent dual purpose compound. Hawk also makes some dual purpose pads.
08-23-2001, 10:40 AM
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Marc,
As far as breaking systems, the slotted rotors resist cracking better than the drilled. The drilled look good but hair line crack easily. The jury is still out on the frozen rotors. I would stick to the slotted non frozen variety.
Brake pads...ther are four excellent varieties on the market for the track and Metal Masters is not one of them.The four systems are Padgid(expensive), Hawk (dust can be abrasive on the wheels), PFC( good for heavy cars, but can be abrasive on the rotors)& carbon-kevlar type made by Kerr Friction( which work well but do not last as long as the Padgid). As a plug I will sell you the carbon-kevlar type...my name for them is KOOL KEVLAR. All pads, since 1990 asbestos free law went into effect, squeeeeek. Many of the OEM pads are chamfered to minimize the noise. The "racing" type pads will squeak at the two mph before the stop sign. The pad will "****" against the rotor at mild pressure causing the fingernail on the blackboard effect.Many people replace the street pad,eg Metal Masters, with their track pad just before the event as they switch to their track tires.
Good luck and have fun at the track.I run the oringinal Boxster on the track..914-6.
Pete
As far as breaking systems, the slotted rotors resist cracking better than the drilled. The drilled look good but hair line crack easily. The jury is still out on the frozen rotors. I would stick to the slotted non frozen variety.
Brake pads...ther are four excellent varieties on the market for the track and Metal Masters is not one of them.The four systems are Padgid(expensive), Hawk (dust can be abrasive on the wheels), PFC( good for heavy cars, but can be abrasive on the rotors)& carbon-kevlar type made by Kerr Friction( which work well but do not last as long as the Padgid). As a plug I will sell you the carbon-kevlar type...my name for them is KOOL KEVLAR. All pads, since 1990 asbestos free law went into effect, squeeeeek. Many of the OEM pads are chamfered to minimize the noise. The "racing" type pads will squeak at the two mph before the stop sign. The pad will "****" against the rotor at mild pressure causing the fingernail on the blackboard effect.Many people replace the street pad,eg Metal Masters, with their track pad just before the event as they switch to their track tires.
Good luck and have fun at the track.I run the oringinal Boxster on the track..914-6.
Pete