91 q45 rotors

Post by **godking** » Wed Jan 15, 2003 3:23 pm

has any one tried irotors? (http://www.irotors.com) they seem like a great deal (drilled and slotted $310 front and back with Axxis Metal Masters)

I'm eatng my oem brakes way before the warning comes up. (do the sensors really work)

open to suggestions.

thanx for the help in advance.

Post by **DAEDALUS** » Wed Jan 15, 2003 3:23 pm

Sounds like a good deal, though I've never heard of them. If you go for it let us know if you're happy with the product and service.The sensors work fine. Are you certain the pads are OEM? Did you buy the car used? I'm going to guess that the sensor harness was spliced and shorted to eliminate having to replace the sensors with the pads. Both passenger-side brakes have a single sensor that is pressed into the pads, but most aftermarket pads don't come with sensors. So many owners short the wires just to get rid of the error message.

Post by **godking** » Wed Jan 15, 2003 3:23 pm

I bought out my step father’s lease (6+ years ago) so it has always been "in the family" and the brakes have always been done by one of the two dealers in town (Vancouver). Both times I've waited until the brake message came up the rotors were totally destroyed.

Post by **greg_atlanta** » Wed Jan 15, 2003 3:23 pm

You should get through two sets of pads before the rotors wear out (provided rotors are resurfaced with new pads). If you notice warping it's good to have rotors resurfaced between pad changes.

That means 1 set rotors = 2 sets pads = 3 resurfacing of rotors.

So I don't think the parts are the problem, it's the level of maintenance.

Post by **PalmerWMD** » Wed Jan 15, 2003 3:23 pm

Or maybe the type of pads?

many aftermarket pads are too hard, usually to make them last longer.

the factroy pads are softer, a brake a lot better and dont chew up the rotors as much as aftermarket pads do.

Fred...

Post by **godking** » Wed Jan 15, 2003 3:23 pm

looked at my last invoice. both the discs and pads have nissan part numbers, and I was charged for 2 sensors. Anybody have a guess on how many miles is average between pads.

Post by **natsoundup** » Wed Jan 15, 2003 3:23 pm

I replace at 30k...both front and rear.... while the rears could probably go another 10k, I don't want the car in the shop again...

I have never chewed up a rotor...however, the last time I had the fronts changed, they said the rotor was too thin.... they basically said most rotors are made as throw away items....

That did not make me happy, but it was only 160 dollars for a pair of rotors.....

Post by **Q45tech** » Wed Jan 15, 2003 3:23 pm

The orginal pads with a dash 90 were made to wear and stop fast and well, as owners kept whinning and sniveling about changing pads and tires at 17,000 miles - the dash 91 series was developed, then the dash 92 now the current dash 93 series pad.

As the pads changed the average street life increased and so it seems did the hot stopping distance.

Post by **szh** » Wed Jan 15, 2003 3:23 pm

On my 95Q, my pads seem to last about 30k miles - I do not let them get down to the sensor. Much of this is highway driving (to and from work), so that may extend life a bit more than usual. Rotors seem to be lasting for three pad changes - probably due to the mileage being highway miles rather than a lot of stop and go, I would guess.

On my 91Q, they seemed to go quicker - in the 15k to 20k range - but I also tended to get warped rotors quickly. This thus caused the rotors to need more than usual re-surfacing and that made for more frequent replacement!

Z

Post by **Q45tech** » Wed Jan 15, 2003 3:23 pm

The F/R rotor and calipers are identical in 90-96Q as are the brake lines, hubs and bearings! The ABS and master cylinder is different in appearance but functions the same. The line pressures are the same as is the differential pressure break point.

I found things like kingpins, hubs, bearings were worn and out of spec on my 90 once these were replaced and fine tuned so the hub was perfectly true, the rotor time to warp doubled!

It takes a tremendous amount of time to index the rotors so that they are not installed warped brand new.

Dealers have on the car brake lathes which can cut the rotors wrong to match the bad hubs bearings thus effectively true the rotor to each individual wheel.

Post by **Q45tech** » Wed Jan 15, 2003 3:23 pm

Depending on driver/location/style/traffic identical Q can get 15k, 20k,30k, or 40k on a set of identical brake pads and rotors.For some reason women Q owners tend to get poorer brake life, just an oservation no detailed records kept.

Crazy to wear the pads down to the warning light as the 8 mm new thickness is part of the insulation to keep the brake fluid cool.

2-3 mm pads will boil the fluid much much faster and earlier. I always change pads at 2/3 worn for safety.

The pads have 7-8mm wear range but the rotors only 1mm per side in front..........the rear rotors only have 0.5mm per side wear limit.

Post by **godking** » Wed Jan 15, 2003 3:23 pm

Thanx for the input guy... this board is very cool.

1 more question. I put slotted discs on my 00 Discovery and the differnence in heat was amazing. when off road with the stock brakes you could watch the mud drying in the wheel wells from the heat, with the slots, braking atleast as good and no mud bake. Now my braking is a little more extream ;7) in the Disco...

So the question is... Do you think the slots help on the Q, and are thier any ABS issues.

Post by **Chally** » Wed Jan 15, 2003 3:23 pm

Slots will wear the pad quicker, as they gently slice the pads. The slots also do keep them a bit cooler.

No ABS issues, as the ABS only works when a wheel skids.

Post by **szh** » Wed Jan 15, 2003 3:23 pm

Hi!

I think I am going to try the irotors.com rotors with OEM Infiniti pads. The price is right - for a 90-96 Q, the cost is $229 (plus shipping and tax) for a total of $274 for all four rotors. A heck of a good deal, if they work well. If not, well, then it will be an interesting experiment at the very least!

Z

Post by **godking** » Wed Jan 15, 2003 3:23 pm

sz FYI,I talked to irotor on the phone and they really pushed the Axis pads over OEM with these discs. So much so that he would give them to me for $85 shipped for the set if I bought all 4 discs.

Post by **szh** » Wed Jan 15, 2003 3:23 pm

godking wrote:sz FYI,I talked to irotor on the phone and they really pushed the Axis pads over OEM with these discs. So much so that he would give them to me for $85 shipped for the set if I bought all 4 discs.

Interesting! I ordered from the web site, so I did not get the pitch for the pads. I am tempted to stay with the OEM, since they do have the sensors, etc. Plus, I seem to remember that Dennis strongly thinks that the OEM pads are better overall than anything else.

Did you go for these rotors, by the way? If so, how do you like them? I have to admit that this is a bit of an experiment for me ...

Z

Post by **godking** » Wed Jan 15, 2003 3:23 pm

zmine are down at my post box in washington. (it's way easier to bring car parts up to canada myself.) I won't make it down there til next week, so let us know what you think when yours show up.

srb

Post by **szh** » Wed Jan 15, 2003 3:23 pm

godking wrote:zmine are down at my post box in washington. (it's way easier to bring car parts up to canada myself.) I won't make it down there til next week, so let us know what you think when yours show up.

srb

Will do. I just got an e-mail from them that they will ship tomorrow and I should see them by the end of the week.

Z

Post by **godking** » Wed Jan 15, 2003 3:23 pm

Hey,Did they show up Z?srb

Post by **szh** » Wed Jan 15, 2003 3:23 pm

godking wrote:Hey,Did they show up Z?srb

Oh, sorry, I forgot to post. Yes, they are here and look like they will work fine! The machining seems very well done, without any burrs in the drilling or poor slot machining, etc. But the proof will be after they are installed, i.e., if the runout is good enough and they brake well, etc.!

The front and rear rotors look quite different, of course. I have not compared them to the ones I currently have on the car (OEM Infiniti), but will do so sometime.

I have been a bit lazy about ordering pads so I have not actually had the rotors put on the car yet. Will probably do in the next few days to weeks.

Z

Post by **Q451990** » Wed Jan 15, 2003 3:23 pm

Hey godking and schosain,

Any feedback on the iRotors yet? I'm thinking about trying them... the claim they're drilled in-house with Bradi blanks and are zinc plated. I'll use OEM pads. I've used PowerStop cross-drilled with aftermakret (glazed after a few months) and then resurfacaed with OEM pads, and they've done very well... but at the price for irotors, I'm tempted.

Their return policy ($20 max) scares me, but they have now agreed to a 60 day return if they warp or crack.

Heath

Post by **szh** » Wed Jan 15, 2003 3:23 pm

Hi, Heath.

I have not installed them yet ... still haven't found the time to do it. As mentioned in my other post reply, I just got my pads from Joe, so I gotta schedule some work at a local dealer or someplace to get all the stuff done.

I wish T3 or Daedalus were closer to me!

Z

91 q45 rotors

91 q45 rotors

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