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Old 03-20-2017, 04:58 PM   #31 (permalink)
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Default Re: 99 Miata HPDE build

Lol, it is painted..with rust

MiataMan - If your asking about the shift light, here's the link..

http://www.caraddiction.co.uk/sld5.htm

-Julian
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Old 03-21-2017, 01:48 PM   #32 (permalink)
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Default Re: 99 Miata HPDE build

Oil Change & Rear Brake Upgrade

After a couple track days and several back road drives it was time for an oil change. I've recently had really good luck with Amsoil's products and decided to dump some of their oil into the Miata's crank case to match the transmission and rear end. I chose their Dominator racing oil in 10w-30 and a standard Mazda oil filter in preparation for an up coming track event.



Not much to said about the oil change except for the terrible placement of the oil filter on the BP engine, thanks Mazda! In all reality though, I've seen much worse..



Also got some goodies in the mail. The subframe there is for the future K swap, parts are trickling in now. The rear brakes are a package I bought from another member here, it's an old Goodwin Racing rear brake upgrade kit with a 10.75" two piece rotor and caliper spacer bracket. My plan was to upgrade the rear brakes to a Wilwood Powerlite caliper and 2 piece rotor for weight savings, but for the price I couldn't pass up this upgrade.

Step 1 was to clean everything up and paint the old and fading anodized surface of the caliper spacer brackets. I sprayed them the same high temp aluminum color as the caliper and bracket and let them dry over night under heat.
Installation was a little unorthodox. The recessed section of the bracket with the helicoil threads is mounted to the back side of the knuckle so that the main surface of the bracket is flush with the mounting surface of the knuckle(closest to the rotor). Basically this portion of the bracket is mounted a$$ backwards to how the factory caliper bracket is mounted to the knuckle. Now that the spacer bracket is on, the 2 piece rotor goes onto the hub and the factory caliper bracket and caliper can be mounted. In my case this required manipulation of the hand brake adjustment on the rear caliper, a 4mm allen screw behind the central 14mm bolt on the back of the caliper. Don't forget to readjust this once put back together or else your hand brake won't exactly work well(ask me how I know). The supplied fastners are 9mm allen head units and the lower bolt is a bit difficult to get onto straight. I used a 3/8" U joint to get onto the bolt but a ball 9mm allen would work well also. On to the money shot,



Conclusion, I haven't had a chance to test drive the car since the install but just from having the parts on the work bench it doesn't seem like there is much of a weight savings from these particular rotors. I don't expect a great increase in braking performance but that should be evident by this weekend. I'll give my final thoughts after the track day.

-Julian
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