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Brake upgrade "Jonathan Mod"

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Brake upgrade "Jonathan Mod"

Postby 4g4door » Thu Jan 03, 2008 4:44 am

Jonathan Mod

Well guys...you'll be glad to hear that it isn't necessary to hunt down those scarce EX knuckles to upgrade to 10.2" brakes. This bolts onto the non-EX 88-91 Civic/CRX knuckles!
Want to know how it's done?

Read on below to discover the beauty of the Jonathan Mod

Parts list:

    '91 Civic EX Brake rotors...same as 92-95 Civic Sedan rotors ($14.99 each at Pep Boys; probably cheaper at AutoZone)

    Accord Wagon Brake Calipers (will be stamped 17CL15VN; ~$50 rebuilt at Pep Boys). These are the exact same calipers as the ITR, Legend, Prelude VTEC etc. Great stopping power!

    Accord Wagon, Prelude VTEC (etc) Brake Caliper mount stamped 25T (a 23T bracket exists, but I can't promise you it will work). This is what came stock on the Accord Wagon.

    1/8" wheel spacer OR grind ~1/8th" (2.5-3mm) off of the caliper mounting bracket. If you are familiar with the 11" brake upgrade, this is the same modification necessary.

Now, the installation...

First, you need to place the wheel spacer (or washers if you're ghetto) between the hub and your new 10.2" brake rotor.

OR shave off the ~1/8" necessary from the caliper bracket

Next, Install your rotor, mount the caliper, load the pads....(you know how to do all this) and enjoy your upgraded brakes!!!

15" wheels fit fine. If any of you have 14" wheels, you may want to see if they'll clear. They may not.

So you end up with the same rotor surface area as the Integra/EX upgrade, but you're upgrading to ITR quality calipers, larger pads etc. Not too shabby!

You can instead opt to shave 2.5mm off of the caliper anchor bracket if you don't want to run a spacer.

NOTE: I did not write this article. I found it and thought I would share it with every one who doesnt know about the so called "Jonathan Mod".
Crashing a Honda is like kicking a puppy; Its just sad.
4g4door
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Re: Brake upgrade "Jonathan Mod"

Postby gregy » Sat Sep 08, 2012 6:20 am

wasn't familiar with this jonathan mod but I got a lot of ideas here haha, thanks for sharing
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