[fmn716]

I think tim swaped out his drums for a disc conversion maybe he want to sellthose old parts

[TimO]

any canadian carb model has rear drums. straight up to 87

[granracing]

Originally Posted by TimO

any canadian carb model has rear drums. straight up to 87

What was done to convert to discs? Maybe I can use that info to reverse engineer it?

night, yeah, tough when it's only for non-registered cars. Their reasoning is because they'd then be competing with dealers and they offer lower prices. All in hopes of getting more people racing Hondas, which IMO is a good thing.

I need to speak with the company that you listed RJ but couldn't dial out overseas. LOL!! So do they make custom rear rotors for our ludes?

I have a race in a few weeks but several people said I'd be stupid to use up the only four new OEM rotors that exist (at least are known to exist). I'd hate to miss the race though as it's a trip to West Virginia and wife, friends are actually excited about it. That's doesn't happen often.

[rustlude87]

maybe you should just try the brembos Gran? I would try better studs? I know ARP makes some, but I still don't see this solving the problem....

[TimO]

to convert to drum you will need.....
rear hubs
drums
baking plates
wheel cyl's
shoes and spring kit
ebrake cables..not sure you need them?
rear flex hoses
hard line from flex to wheel cyl
IF you cannot seperate your control arms from the hubs then you will need the whole rear setup with good control arms
think thats it. but i dont see this solving your issue as the drums use the same idea as the disk, where the studs are attached to the drum not a wheel bearing spindle.

not sure if you answered this but is it always the same side? if so i would look at possibly some other issue thats causing the rotors to fail. bent rim or flat spoted rim will couse some serious vibration wich could eventualy will stress the rotor. you may not feel it in the car but that doesnt mean its not there. could also be an alignment issue? abnormal stress on the rotor to start with, coupled with some very hard driving= failtown
just some thoughts.

[granracing]

maybe you should just try the brembos Gran?

I don't even know if you're kidding or not. lol yes, have tried Brembos but they are not made by brembo themselves and failed.

I received a phone call last night about this issue, from Honda! Pretty cool. They'd actually consider making a small batch of these, but they would need to be sold. Unfortunately there just isn't enough demand even at a small quantity of 40, at about $130 each. (They need to cover their costs and HPD needs to show a little bit of a profit which is more than reasonable.) I'd seriously consider buying 10, more if I could. But that leaves quite a few remaining.

Typically they fail on the same side, but that's not unexpected since the tracks I race at are primarily right hand turns.

[granracing]

Just sent an e-mail that brake company and the retailer. It'll be interesting to learn more about what they might be able to do.

Have you ever bought a set of rotors from them? How do you think they'd compare to an OEM Honda rear rotor strengthwise?


Rustlude - what tires, compound, and size are you racing on? That could very well be the difference, not sure.

[night]

That is awesome from Honda on it but difficult to justify. I'm really doubting actual OEM made is going to be better. Maybe last a few more races and then the same thing. The aftermarkets can't all be that bad.
I'm leaning to the finding a similar size sealed bearing and milling out the rotor idea.
If I had more time I would be pulling cars apart at work to compare, but I can't get to all that right now.

[JDM86lude]

gran yes they are oem r u intrested in them let me know

[granracing]

Oh man. Just saw you're located in Japan. Wonder how much that would cost to ship? Still interested in the rotors if they're new though.

Spoke with the shop in the UK about Nitrac rotors and they said it's still the same source of castings as everyone else. Darn it!

Still interested in those OEM ones you have JDM, but is anyone familiar with Royalty Rotors? Supposidly they cast the rotors themselves, but am not sure of the quality.

[rustlude87]

JDM86lude lives in NC Gran. Im also pretty sure those arent OEM rotors...

[granracing]

Oh, his location says Japan which is why I thought he lived there.

[cygnus x-1]

For other rotors that might fit you could also check with these guys.

http://www.fastbrakes.com/

They put together the Wilwood setup for the guy over on 3geez.


Retro fitting another more common Honda hub might be the simplest option in the long run. If I were doing it I would try to find a hub where the bearing inner diameters are larger than the 2g spindle. That way the spindle wouldn't have to be cut down and possibly weakened since a sleeve could be made to adapt the new hub to the stock spindle. The calipers would still probably need to be repositioned or maybe replaced with something else.


C|

[granracing]

Retro fitting another more common Honda hub might be the simplest option in the long run.

This would be ideal, but am having a heck of a time trying to figure out what other Honda might work with this. I'll speak with Fast brakes - thanks for the recommendation.

The other night I receive a call from Honda's racing division. Wow! How cool is that? They are working on trying to come up with a solution for the rotors. One thing they did was reach out to StopTech and speak with them about providing assistance. I think that is so cool of them. We'll see how things progress.

Nitrac sent some additional information to me, and it might be another option. Shipping from the UK to the US is expensive though! 64 pounds for one set;90 pounds for two sets ($143 USD just for shipping).

[granracing]

Are the UK 2nd gen prelude rear rotors and hubs different than in the US? It almost appears like that's the case.

Here's what Brembo has for a rear rotor:
http://www.bremboshop.co.uk/_p4133650.htm

[night]

88-91, I think you should give your eyes a break

[granracing]

It states '87 - '91 on that linky. But you're probably right, should give my eyes a break. Eh. Time to call Honda back.

[night]

actually, as dumb as it is, it's a 'greater than' > symbol.
or maybe, likely, they just don't have a clue about preludes.

[TimO]

over seas the 3g started in 87.5. thats why you will see somtimes parts for 87.5-91

[shedbound]

I have a 1987 Prelude rear discs that runs 1/4 mile ovals - the rear rotors are several years old, but I have no idea if they're original Honda parts...they came with the car. Do all your rotors break in 2 pieces? Do you use a torque wrench on your lug nuts? Is it always the same rim? Maybe you could run a bead of weld around the high stress areas of a new cheap rotor & see if it helps. (would have to heat & cool slowly)

[granracing]

It's not always the same rim but up until now, it's been the same side (left which makes sense since that side sees the greatest load with primarily right turn tracks).

Torque wrench the lugs and bearing nut. Thought about welding it, but spoke with several people and basically that isn't an option.

Honda is working with a brake company to see what they can do. I'm curious how things progress with that.

[Smeado]

I wonder if there is any other brake discs that might fit... I did a quick search on rock auto and the P/N used in our rear wheel hubs are used by a variety of different manufactures... maybe just maybe one of them might work out, the break caliper would need to be shimmed or ground for a different offset but hell it might work. I know it is not that helpful but if i were in your shoes i would go down to a junkyard and start pulling off any and all hub that i thought even might fit and test fit them on a lude that is in the lot (if you have a junkyard like that)

I wish i could help more.

Smeado

[rustlude87]

Originally Posted by granracing

Just sent an e-mail that brake company and the retailer. It'll be interesting to learn more about what they might be able to do.

Have you ever bought a set of rotors from them? How do you think they'd compare to an OEM Honda rear rotor strengthwise?


Rustlude - what tires, compound, and size are you racing on? That could very well be the difference, not sure.

I just saw this sorry I run brembo rear rotors and Hawk HPS pads, Front has autozone rotors and hawk blues. I run the direzza star specs 195/50/15, but I've done only HPDE's and run the car hard.

[granracing]

I run Hoosier 225s, so I'm sure that's a factor of why I'm experiencing issues and you're not right not. (Also, Hoosier 225s tend to run wider than most other manufacturer 225s.)

[Derekb]

We lost a RR hub near the end of the 24 hours of LeMons race last weekend. It had nearly three races on it and we ran shaved Dunlop Direzza Star Specs in 205 size on a 15x7 rim. This car was beaten to death and it was probably time for the hub to go. Managed a top ten lap time with the car, though! Junkyard motor and all!

-Derek