147 replies to this topic

[bernardshorty]

where does a bloke get the qfms from

[ToF]

bernardshorty, on 18 April 2011 - 12:32 PM, said:

where does a bloke get the qfms from

If you just quickly checked in the forum this thread is from you'd see it straight away: http://www.jzx100.co...ke-pads-jzx100/

[Arthur]

FragLord, on 18 April 2011 - 08:35 AM, said:

Wouldn't waste your money tbh, I found all the rspec pads did was warp my rotors, changed to QFM's and they are a lot better. Higher temp, better braking aswell.

You obviously have little understanding about what causes warping of rotors. Heat and uneven cooling causes warping not the friction material. Your BS meter is running on overtime with that type of comment. I have no objection to you promoting an Aussie product but not at my expense. If you don't have the necessary cool down sequence warpage is likely to occur. I move the car 1/2 a wheel rotation every few minutes for about a half hour even after a cool down lap to prevent disc warping.

AND, Tats cooked his pads. Ultimates will handle drifting but not circuit use. The temp. minimum for circuit use is 600c and if you are serious 850c.

I have also used QFM Comp 9 to compare performance on our track car with 850c rated RSPEC pads. AND, I am underwhelmed. While the braking effect was comparable between the two types the QFM Comp 9's were all but worn out after one track day BUT, the very disappointing and potentially dangerous thing that happened was that friction material separated from the backing plate. It was particularly noticeable on two of the four pads and the other two had some separation around the edges. IT appears to be a bonding issue and I have made contact with GSL RallySport who have forwarded on the information. I have also said that I would post the pads back to them for inspection.

[FragLord]

I am aware that heat causes rotor warping, but so does some material of pads.

That was just my experiences with them with 0 track work, occasional hills runs on a weekend. I always gave them adequate cool down after driving semi spirited.

I even tried machining the rotors after they warped once, within 2 weeks I had brake shudder again, QFM's on the same rotors with 0 warping issues.

**Note this is my personal opinion, plenty of people like the pads, I just don't think they are for me**

[Arthur]

FragLord, on 13 May 2011 - 07:54 PM, said:

I am aware that heat causes rotor warping, but so does some material of pads.

That was just my experiences with them with 0 track work, occasional hills runs on a weekend. I always gave them adequate cool down after driving semi spirited.

I even tried machining the rotors after they warped once, within 2 weeks I had brake shudder again, QFM's on the same rotors with 0 warping issues.

**Note this is my personal opinion, plenty of people like the pads, I just don't think they are for me**

I deal in hard facts and analytical testing rather than ill considered arbitrary comments.

[gslrallysport]

Arthur, on 13 May 2011 - 07:02 PM, said:

You obviously have little understanding about what causes warping of rotors. Heat and uneven cooling causes warping not the friction material.

Ah... no.
For the hard facts have a read of what the late great race car engineer Carrol Smith has to say about 'warped' rotors:
http://www.stoptech....brakedisk.shtml

Arguably the greatest race car engineer ever said:

In fact every case of "warped brake disc" that I have investigated, whether on a racing car or a street car, has turned out to be friction pad material transferred unevenly to the surface of the disc. This uneven deposition results in thickness variation (TV) or run-out due to hot spotting that occurred at elevated temperatures.

If rotors truly did 'warp' from uneven cooling then ever time I drove through a water splash in the rally car with red hot rotors, they'd 'warp'... fact is they don't.

[Guybob]

fkn rolled. well played sir.

[Kimochi]

anyone got contact for this dude?
i purchased a pair 2 weeks ago, havent got any replies yet.