you can dump weight without losing creature comforts. going from 25 lb to 20 lb wheels is a 20 lb weight savings in the best place - rotating. a lighter exhaust also brings performance benefits (apparently). etc.
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My boxster is a street car that was race car inspired. Losing weight was the easiest way to make it go faster and I believe I took 250lbs out of it. No carpet in the trunks, insulation, stereo, Miata battery, lightweight seats, Chinese headers, custom made exhaust using a 987 muffler, no rear bumper support, manual top, deleted airbags, GT3 center console, and the rubber trunk gasket. I had to put the front one back on as it helps the frunk pop open. You can see it all on my thread but you have to use google chrome because all the pictures were used with Photobucket. There's an app on chrome that gets around photobucket's block.
http://986forum.com/forums/show-tell-gallery/59449-woodys-build-thread.html |
My 986 was set up exactly as a track capable street car to BSX class rules. I didn't have any issues with the PS pump in over 100 track days so I don't think it *MUST be a weak link. Unless you are running 40 TW R-comps and sawing the wheel way too much you probably won't have much trouble with it either. The UD pulley does help take the strain off by effectively lowering the PS RPM with no downsides. Remember that the steering wheel is effectively a brake so drive the car with your right foot and apply minimum steering input. This is faster and improves reliability.
I also kept the A/C because I live in the desert and on rain days the AC works great as a windshield de-fog. Ask the SpecBox guys about this. A lotta work to pull it out for little gain and you do lose a lot of creature comfort in the process. Getting competitive: UD pulley Race seats bolted to the floor Lightweight battery Roll bar ext for safety PSS9 Comp sways 4 sets of 17" wheels Racing brake pads Motul 600 brake fluid GT3 front brake ducts NT-01 tires both square and staggered for different track configurations. Pro corner balance, alignment and suspension setup. Class weight was 2950 lbs all up with driver and I was right on it with 1/4 tank of gas. In CA we have to meet sound rules to run Laguna Seca so I left the exhaust bone stock. I never got blackballed for sound as many of my competitors did. This car was very competitive with several BSX TT championships and 4 BSX track records across all of PCA, POC, and NASA. It was also still comfortable and fun to drive in the canyons. What would I do differently? If not constrained by BSX class rules I would have added GT3 arms for better adjustability, to get more camber up front and improve tire wear. PSS9s are a compromise strut and work *just ok*. If I wanted better control of the contact patch I would go with JRZ for full adjustability at the cost of around $8k installed and tuned. I rarely ran R7 tires and felt that the comp sways often tied the car down too much for NT-01s so I ran them at or near full soft. I might have gone with the simpler M030 sways and tuned with the struts instead for better control. |
You guys are great! SO much info.
Regarding harnesses, is it reasonable to mount shoulder belts to the stock roll bar crossmember? Seems like a good spot? Now... where is the check book... |
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yessir, you can only go as fast as you can trust your brakes - high temp brake fluid is a must - i swear by rbf600.
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