curlybandit

Hi everyone.

I picked up my '93 del Sol from my mechanic after he competed a front brake conversion. We replaced the front knuckle/spindle assembly with one from. '94 Integra, installed 11.1" Prelude rotors (redrilled) and ITR front calipers. I had purchased 3mm spacers to accommodate for the larger calipers but my mechanic said they did not fit the size of the hub. It was decided instead to attempt to grind away 3mm off the caliper bracket as accurately as possible, just as it has been done many times on many of the exact same conversion.

The calipers fit perfectly and the brakes are great, but for some reason, something is rubbing against the inside of the left rotor and the outside of the right rotor wen the wheel is turned at almost full lock. It's causing a metallic grinding noise and leaving behind a score mark on the rotors.

We inspected the caliper bracket and roots with the wheels off, but can't see anything that would be rubbing against the rotors. It only happens with the wheel turned to almost full lock and moving forward.

Any ideas what this might be? Are there any suspension components we didn't consider? I may have to have ye bracket inspected to ensure it's even.

Thanks!

curlybandit

At this point I'm assuming it's the brackets. I'm planning on having them worked on again. If this fails, I'll purchase another set of brackets and try to find a machine shop that will mill them, or this time ensure that the vendor who sold me the incorrect spacers sends the correct ones.

If anyone has any other suggestions please let me know.

I've attached some pics. I apologize that they are a little large, but you can see more details:

curlybandit

I think I figured out the problem.

Based on the information I've obtain on other forums, it appears that the problem is a combination of the ride height, the width of the Prelude SR-V rotors with larger ITR calipers and the extended lower ball joints (roll centre adjusters).

The Buddy Club ELBJ's lift the knuckle approximately 0.75" which in turn lowers the ride height approximately the same amount. On a car that is already sitting fairly low on lowering springs, it's taken the height (approximately 2 finger widths between tire and wheel well) and made it so that the tire is sitting almost tucked under the wheel well.

Although the ELBJ's are designed to correct the altered suspension geometry, the lowered height brings the front lower control arm closer to the rotor. Combine this with the increased width of the rotor from stock, the out edge of the control arm makes contact with the inner aspect of the rotor. There were two points of contact that were seen on the control arms contacting both rotors.

The temporary fix was to grind away some of the outer material of the lower control arms. This seems to have fixed the problem. Thanks to an exceptionally good friend we could take care of it today. I'll have to wait and see if this was sufficient under more aggressive driving.

The caliper brackets could still use a small amount of milling/grinding to remove another 1-2mm. This should help centre the rotors more. The addition of a front camber adjuster to increase the negative camber and/or taller lowering springs/coilovers would help as well.

I have Skunk2 Pro-Series V2 coilovers with 10K front and 8K rear springs sitting in a box that I could use, but I was content with the softer ride of the OEM struts and H&R lowering springs. I may need to re-evaluated that.

Adair

It's good to read that you were able to diagnose the problem and figure out a possible solution. Sorry that more input wasn't given in this thread, but appreciate that you left some good information for anyone who may have similar difficulties in the future.

curlybandit

Thanks!

My thoughts exactly. It's likely someone will come across the same issue. Hopefully this info will help them out.

Cheers!

devingodard

Big FYI unless you have a cheap machinist to redrill your rotors you can use Mini Cooper rotors. I have a thread posted in DIY section with mostly all possible honda oem brake upgrades. I did the same thing to my civic dx. Itr calipers but without the spindles so I could just run 10.3 inch rotors. Ill post te year and model mini in a sec have to find it again.

devingodard

https://www.civicforumz.com/civic-di...grades-180684/

Link I thread with another link in it to a honda brake master down in the states.

It's a 2007 Mini Cooper non s front rotors. Both are 11.3 and hub centre is 56.1. But the bolt pattern on the mini is 4x100

Adair

Appreciate you adding the link, no doubt it will be of help to someone with a similar issue.

devingodard

Figured I had a lot of trouble gettin any info through any canadian sites. It's like a lot of Canadians jut go fast and turn fast lol don't like the brakin zones though lol