Brake upgrades, retain 4 bolt wheels? |
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Brake upgrades, retain 4 bolt wheels? |
jpnovak |
Nov 2 2012, 03:13 PM
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#1
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They call me "Nanoman" Group: Members Posts: 231 Joined: 26-August 09 From: Austin TX Member No.: 10,736 Region Association: Southwest Region |
So the Subaru conversion is up and running and I am planning for next season's track events. A concern of mine is the stock solid rotors ability to dissipate heat. I went digging in the archives but the information is scattered to say the least. Most was why Boxster calipers are not an upgrade. No kidding.
Now I am very familiar with the "upgrades" and real upgrades related to early 911s. I only want more heat capacity over a run session. I tracked my warmed over early 911 for years with stock M front calipers and had no issues. Proper brake technique, cooling ducts and decent pads can really provide excellent braking. I am not as familiar with the 914 system upgrades. The system has been brought up to stock quality with rebuilt calipers and for the street functions just fine. I have no issues with the braking force just the ability to stay cool. What are the options? Will cooling ducts (AJ or other) work on these cars in the same way they do on a vented 911 rotor? What pads work well? Can I stay with 4 bolt wheels? I do not really want the added expense of a 5 bolt conversion right now. Are there any "hats" that will fit over a stock 914 brake "hub"? |
john rogers |
Nov 3 2012, 01:42 PM
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#2
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
Over the years, here are the things I tried. First was stock calipers and rotors (F & R) with racing pads, not great for heat removal. Next were BMW calipers on front with stock rotors and racing pads, ducts and 19mm mc, tee and this worked well until a street race in Tecate MX with short straights and the brakes faded badly!
Final setup was Brad's alloy hubs with vented rotors, M calipers in front, BMW calipers in the rear, tee, 23mm MC and never any brake issues again. The 4 bolt hubs allowed me to use Center Line 7 inch wide solid rotor wheels and Goodyear cantilever slicks which are the lightest wheel/tire combo you can probably use but are very rare! The 914-6 could out brake any of the vintage 911s by waiting an additional 50 feet or more! No brake fading ever again. |
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