Awesome work! I might have missed it, but how did you deal with the Corvette's 120.65x5 bolt pattern vs BMW's 120x5? Is there enough 'slop' in the rotor holes to make it a non issue? Also along the same lines, what about the Corvette's 70.3mm center bore to the BMW's 72.56mm?
Oops. Great questions. You're right about the lug holes, non issue. Enough slop. We opened up the center bore on a lathe and forgot to mention it. -Joe
I added a more in depth explanation to the description: "***We forgot to mention details about C6 Corvette rotor mods. The 5x120.65mm bolt pattern isn't a perfect match for BMW 5x120mm, but fits ok for us in our application (this is 100% NOT TRUE for wheel bolt pattern variation of any kind, ever!). The rotor bore was too small by a few mm, so we opened them up to clear the BMW front hubs by a few thousandths of an inch. They fit great now ;) ***" -Joe
E46 330 brakes would have been more than adequate, cheaper, with less adaptation. NASA spec E46 race series uses factory brakes with upgraded pads and no issues. Albeit, less wow factor. 👍
Yeah, e46 330i/ix is tried, true, and not very expensive. But I'm a brake snob, and I wanted some big fancy brakes! We're going to do endurance racing as well, and depending on our power levels and lap times, we may have been able to fade a front 330i setup. Now we'll never know! 😆 🤣. Also, these all have 2-pin pad changes (done in seconds). No bolt removal required. -Joe
How do you know? Maybe we can learn from your experience. I'm aware pure braking power/capacity isn't the only thing that matters. You have to pick the correct pads that will get up to operating temperature in your application, which I think we have done (track time will tell). We also need to have the right balance of forces/components in our hydraulic system for pedal modulation (again, we will know in testing). I've driven a few lightweight cars with very large non OE brakes on the street and the track (240SX and E30 BMW). Both were a blast to drive once I upgraded away from the terrifying brake fade. -Joe
This is absolutely crazy. Love it, can’t wait to see how this turns out
Rock on. Crazy (in a good way) is our brand of cat build! -Joe
Awesome. Great progress. Love the FEA analysis and coupon tabs.
Thank you so much! Yeah, it was my dream as a kid to design race car parts. I guess I should have been more specific (to be PAID to design...). Lol
I love how the upgrade was approached. Many thanks thanks.
That’s a lot of nice progress. Definitely unique in the 2002 world. Let me know when you want me to do the metalwork on that body. 😂
Careful what you wish for. We have ZERO pride and we'll welcome the help 😆 🤣 -Joe
Very cool build!
Thank you David
Killer brake setup!
I hope nobody dies! 😆
Nice
Thx man
Awesome work! I might have missed it, but how did you deal with the Corvette's 120.65x5 bolt pattern vs BMW's 120x5? Is there enough 'slop' in the rotor holes to make it a non issue? Also along the same lines, what about the Corvette's 70.3mm center bore to the BMW's 72.56mm?
Oops. Great questions. You're right about the lug holes, non issue. Enough slop. We opened up the center bore on a lathe and forgot to mention it. -Joe
I added a more in depth explanation to the description: "***We forgot to mention details about C6 Corvette rotor mods. The 5x120.65mm bolt pattern isn't a perfect match for BMW 5x120mm, but fits ok for us in our application (this is 100% NOT TRUE for wheel bolt pattern variation of any kind, ever!). The rotor bore was too small by a few mm, so we opened them up to clear the BMW front hubs by a few thousandths of an inch. They fit great now ;) ***" -Joe
E46 330 brakes would have been more than adequate, cheaper, with less adaptation. NASA spec E46 race series uses factory brakes with upgraded pads and no issues. Albeit, less wow factor. 👍
Yeah, e46 330i/ix is tried, true, and not very expensive. But I'm a brake snob, and I wanted some big fancy brakes! We're going to do endurance racing as well, and depending on our power levels and lap times, we may have been able to fade a front 330i setup. Now we'll never know! 😆 🤣. Also, these all have 2-pin pad changes (done in seconds). No bolt removal required. -Joe
Too much brake on a light car without anti-lock is a bad thing. Ask me how I know
How do you know? Maybe we can learn from your experience. I'm aware pure braking power/capacity isn't the only thing that matters. You have to pick the correct pads that will get up to operating temperature in your application, which I think we have done (track time will tell). We also need to have the right balance of forces/components in our hydraulic system for pedal modulation (again, we will know in testing). I've driven a few lightweight cars with very large non OE brakes on the street and the track (240SX and E30 BMW). Both were a blast to drive once I upgraded away from the terrifying brake fade. -Joe