Killer Deal on 300c and 300 Cross-drilled Slotted Rotors

[GS163]

Thanks for the enlightenment Dave. When I redid my brakes, I put the 2 piece rotors, Hawk pads (forget which compound), stainless braided brake lines, Fikse 3 piece wheels (9.5" front and 11.5" rear), complete flush, and new Good Year GSD3 tires. Havent upgraded the calipers yet, and at this point, probably wont. I can say when I did this, my car would literally throw you to the winshield if you didnt have a seat belt on. I am more than happy with the combo I have put together, but you have also givin me something to think about when it comes time to do the brakes again. Thanks for the lesson. May have to post a link of this thread to some of my vette buddies on the other sites.

[DZeckhausen]

Originally Posted by GS163

Thanks for the enlightenment Dave. When I redid my brakes, I put the 2 piece rotors, Hawk pads (forget which compound), stainless braided brake lines, Fikse 3 piece wheels (9.5" front and 11.5" rear), complete flush, and new Good Year GSD3 tires. Havent upgraded the calipers yet, and at this point, probably wont. I can say when I did this, my car would literally throw you to the winshield if you didnt have a seat belt on. I am more than happy with the combo I have put together, but you have also givin me something to think about when it comes time to do the brakes again. Thanks for the lesson. May have to post a link of this thread to some of my vette buddies on the other sites.

Going to the Goodyear Eagle F1 GSD3 tires probably made the biggest change to your braking out of all the other changes you made. I have them on my BMW 540i 6-Speed and they rock. The difference in braking capacity between them and the Dunlop SP Sport 2000E tires that came with the car was simply amazing. Installing light weight wheels (Fikse) and cutting a few pounds by using Baer 2-piece rotors also improved the braking and handling. I'll bet the car felt terrific after all these modifications.

When you're ready to start tracking the Corvette and want some really impressive brake upgrades, let me know.

[GS163]

What do you think about the Movit 6 piston calipers?

[todd tce]

Hey Dave, you are aware that there is over $300 on hand to anyone who can produce proof of any production car rotor with 'cast holes' in it?

I and some others have had this on the table for over a year now. I started the bounty to disprove this foolishness and kill the rumor once and for all.

We have reviewed all the manufactures including the Movit parts, Brembo parts and even seen mold casings use to make many of them. None of them have wall casings to manufacture a rotor with holes cast in it. A Brembo gent who pulled drawings in fact agreed and called it "American rumors".

As they say on the internet today; Rotors with cast holes:

I'm curious to know if you have any data to the contrary. The offer is "proof, mold pics, rough casting pics etc." showing these items. No third party "I was told" type of info.

Here are the three elements of the molds. First is the casting to produce the vaning, next is the mold used to produce that casting part (it's a one time use thing) and third is the mold plate used to produce the rotor wall. In order for a casting to have 'holes cast in it' the mold walls would have to be a full pin fixture on both halves and meet in the middle. The following came into my 'in box'' during this discussion:

"Todd
A close associate of mine that works on the Porsche design team looked up the blueprints of the cast rotors that Porsche uses . Rotors are cast and finished by SHW. The actual holes are drilled into the rotors."

Even with all that I still have money on the table for proof of this. His email and the mold pics from Movit alone do not prove this one way or the other. However until I see a mold plate with pins or a rough casting with light showing through it...I'll call it bs.

[DZeckhausen]

Originally Posted by todd tce

Hey Dave, you are aware that there is over $300 on hand to anyone who can produce proof of any production car rotor with 'cast holes' in it?

I and some others have had this on the table for over a year now. I started the bounty to disprove this foolishness and kill the rumor once and for all.

That's cool. Can you point me to a list of the folks offering the bounty and how much each is offering? I'm feeling lucky.

[todd tce]

I've got $250 on it myself.
Even your primary supplier agreed- but would not put money one it. (whimp!)

Proof positive:
Pics of a rough casting with light visual through it. No machined parts.
Pics of the mold itself with protrusions to produce it.
No 'special one offs' for a 917 or similar. Production parts as this is the stated case.


I'll save you a bit of work, this is not a rotor with holes cast in it.
http://www.jonaadland.com/Movit7.JPG
It simply shows the reliefs cast in the web for the drilling purpose. Machining is quite evident.

I've put this offer on the table for over two years. Still got that money in my pocket. How lucky you feelin'? LOL I'm willing to pay to see it you might say.

A year old discussion on it yielding no proof of their existance and much, much against their truth:
http://corner-carvers.com/forums/sho...ght=cast+holes
Yet I remain open minded if someone can prove me wrong.

[HEMEEE]

If you gentlemen are serious about this challenge, it's time for meee to split this thread. Please advise

[todd tce]

With due respect to everyone here, it's not intended to be a "challenge" of sorts. Simply a request for more info.

What I believe, and have gone to reasonable extent to disprove, is this notion of cast in holes. I'm reasonably confident that it is nothing more than internet rumor and have (for three years) offered a bounty for proof of their existance. The rumor has been around for the 13yrs I've been in business and after reviewing some casting issues and continuing to read of the mythical rotors one day I finally took the position of 'prove it'. The comment pops up on many forums and people speak it like it's some sort of common fact that we should somehow accept. Two years ago I worked a Porsche program and looked closely at Boxster rotors. Yup, they were drilled.

I think it's a great rumor! It deserves a Mythe Busters show! If Dave (or anyone) can produce the proof I'm all over it and more than willing to pay the bounty. It should be one helluva production process as we discussed last year on CC. Despite the fact that I feel it's bunk, the door is still open. I remain open minded and seek facts not rumors. Some have said elsewhere that I should not simply consider it rubish just because I don't have a picture. On the other hand I've not made the claim it's so without any data to back up the statement. We've become so detuned by the internet at times now we often take things for fact just becuase we read it there.

If the need/desire to split the thread is there that's cool. But I'd be disappointed if it were removed. If Dave can offer up proof of this and put it to bed once and for all he deserves the credit for doing so!

[DZeckhausen]

I think I'm getting close. I know someone who actually worked on rotor design at the old Lucas-Varity, which was sold to Kelsey-Hayes in 1996. Then it merged with TRW Automotive and was finally sold off by Northrop-Grumman to an investment group. My contact has called the foundary that worked on these rotors and asked them to pull out the molds with the hole producing features and take some photos of them. It may take a week or two to get.

I'm told that the parts could never be cast without at least one hole on each side of the rotor not forming completely, so all the holes were cleaned up with a drill anyway. But it saved machining time and tool wear over "ordinary" drilling and it did improve the microscopic structure around the hole. These parts were developed for the heavy duty police applications for the Chevy Caprice and Ford Crown Victoria back in 1995. As such, they were limited production, so might not meet the letter of the terms of your bounty. But I'll keep following up and eventually hope to get the same sort of info on the Porsche 993TT rotors. I'll pass along the total bounty to my source if/when he comes through with the proof.