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Old 12-16-2013, 11:08 AM   #29
Mikem53
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Originally Posted by Anthony View Post
DO IT. I see most people are against the idea, but I half-gutted (everything behind the front seats) my DD and loved it so much, I started to consider taking the stereo and A/C out too. That would be a terrible idea living on the Gulf Coast, so I just bought an FR-S and gutted that. Then I un-gutted my DD. Here are some points to consider:
Interesting to read your findings with you weight reduction efforts.. Weight is the enemy.. I'm enjoying having a lighter weight car with less power, vs a powerful car with more weight.. But I'm not sure I would be up for the extra NVH for everyday life.. How much weight have you shed so far? Have you gained an appreciable amount of performance for the weight you dropped so far.. Thanks for the info.. Great stuff you won't find in the rags..
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Old 12-16-2013, 11:44 AM   #30
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Part of me has always wanted to yank the doors and drive around like a Jeep Wrangler. With a rollcage of course...
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Old 12-16-2013, 12:23 PM   #31
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Like others have said the unsprung weight wont make as much of a difference. Get some light wheels (17 x 8 rpf1s with 225/45 would save some good weight) along with lighter brakes (either a bbk or 4 pot subaru calipers or just lighter rotors)

Headers are another good place to drop some weight in terms of exhaust, so getting lower weight & HP is win-win.
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Old 12-16-2013, 12:37 PM   #32
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Oh, my ......

While weight reduction is an interesting topic, ...... if I wanted a small, fun car, that didn't have a "back seat" or a spare tire and was 250# lighter, I would have bought (kept) this car ....

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Old 12-16-2013, 01:13 PM   #33
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Oh, my ......

While weight reduction is an interesting topic, ...... if I wanted a small, fun car, that didn't have a "back seat" or a spare tire and was 250# lighter, I would have bought (kept) this car ....

humfrz
Yup. Im still thinking of getting one as me and the gf are sharing one car right now (and we both work), so that means i drop her off/pick her up.

I was all about weight when I first started on this forum and read too many autox builds. I mean Im looking at weights when I am upgrading, but its cost-benefit. If I can manage to shed some lbs great, but i really do have a budget. Lol
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Old 12-16-2013, 01:25 PM   #34
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Now that's impressive. What battery tender/minder do you use? Any issues in use like heat from the car's high current charging system?
I bought the Shorai one. I have yet to use it or install the battery, so still no clue on performance/questionable-ness of such a tiny battery.

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Interesting to read your findings with you weight reduction efforts.. Weight is the enemy.. I'm enjoying having a lighter weight car with less power, vs a powerful car with more weight.. But I'm not sure I would be up for the extra NVH for everyday life.. How much weight have you shed so far? Have you gained an appreciable amount of performance for the weight you dropped so far.. Thanks for the info.. Great stuff you won't find in the rags..
I'm not done. I scrambled to get as much done as I could for a car meet, and since it has passed, I've been spending more time with friends and family. I just got back from a 6 month deployment. But I roughly estimate I've shed ~185 pounds. It seems to be noticeable. Nothing drastic, of course, but I haven't had the opportunity to really push the car yet. It definitely looks real tough though, if anything.
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Old 12-16-2013, 01:39 PM   #35
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For me as a DD I'll probably do a

lightweight battery
rear seat delete
header back but keep stock muffler
Remove spare and tools unless going on a trip

My goals with my car is keep it looking stock (-ish, besides wheels maybe some springs) and not be obnoxious to drive.
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Old 12-19-2013, 10:01 PM   #36
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@Anthony

Quote:
The car will become way noisier on the inside, which is either a love or hate thing. Personally, I love it. I can hear the road going by under the car. It increases the sensation of speed, and I feel more connected to both the car and road. It's more motorcycle-esque.
The way you described it is basically how I WANT the car to be- especially "I can hear the road going by under the car." - that is dope haha + you lost roughly 185 lbs, more dope! Thanks for the battery recommendation too!

@bestwheelbase can you do that? haha that would be fun, even just to try for the weekend. So many heads would turn haha

@humfrz I mean yeah, that is true, but the FRS just looks way sexier. I have respect for the miata and love the car for what it is, but if I were to ever get one it would be as a side car that I romp around with while not giving two sh*ts and I would very much want it to look like and (in my dreams) have the same components as below haha! (greedy face)

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Old 12-20-2013, 07:42 AM   #37
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Here's my weight loss list. It's mild, but I want the car to pass the Girlfriend test, and I'll be getting performance elsewhere too.

Weight loss:

Removed OEM Spare Tire - 26 lbs
Removed OEM Trunk tools - 6 lbs
Removed Owner's Manual - 3 lbs
Removed washer fluid (1 gallon) - 8lbs
Net loss = 43 lbs

OEM Battery - 30 lbs
Braille battery - 11 lbs
Net loss = 19 lbs

OEM Catback - 39 lbs
HKS Hi Power catback -22lbs
Net loss = 17 lbs

Stock headers - 21 lbs
JDL header -13 lbs
Net loss = 8 lbs

Over pipes & front pipes
Net loss = 2 lbs (estimated)

Total Net Weight Loss = 78 lbs

Edit: just got my car corner weighted. Total weight with 180lbs of driver and half a tank of fuel is 1279.5 kg or 2820.8 lbs. So mch for armchair calculations!

:P

As far as weight reduction goes I like to try and balance it, meaning that I like to take weight off the front to equal whatever I remove elsewhere. Whenerver I don't lose weight I at least try to gain performance without adding weoght but it's a bit of a tradeoff.

I added 18 inch OZ ultraleggeras and michelin PS2s. They weight about the same as the stock 17s net but get a LOT more grip out of them.

I also added RS*R coilovers and an Alcon BBK. No idea what the actual weight savings is over stock but they've increased my car's handling and braking capabilities immensely.

Then there's power to weight:

Stock dyno baseline power = 161.5 whp
Tuned dyno power = 189.5 whp
Net power increase = 28 whp

Guesstimated crank hp = 226 ish?
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Old 02-22-2014, 07:24 PM   #38
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This is an interesting post! To keep the car reliable, good looking and pass the wife or girlfriend test is a challenge, a challenge. I want to increase the acceleration of my vehicle also, as it is 100% stock. From my personal experience some of the easiest and reliable ways is of course lose weight, which many people gave quality data and specs. I agree a tune is simple and can add power! A tune works...! Also, what I would like to do, as I don't drive faster that 75-80 in this, street car (maybe one day autocross) is to change the gear ratio. I have seen some gear sets for sale, I think their was a 4.56 to 4.67 ratio set out there. Gears can make the car accelerate faster at different speeds. I would like to see what 4:56 to 4.67 gears in my automatic with a tune would feel like with the spare out and a 1/8 or 1/4 tank of gas. If I had a manual I would research light weight flywheels and the carbon fiber or light weight drive shafts (rotational mass). I think these two things can make a difference you could feel and have measurable data.

Another way of "changing the gear ratio" would be the tire size. Though this isn't "orthodox" you could go to a 16" wheel, say a Motegi, lose 4-5lbs on the rim and then also lose the tire height, the stock tire is 24.7" and some of the 16" tires are 23.5" for a 215/45/16 or a 215/40/16 will weigh 19lbs (1lb lighter than the stock michelin and 3lbs lighter than the stock Bridgestone) have a tire height of 22.7". These are just a few ideas, as I know there are many ways to move, these are just my thoughts. This in combination with the gear change and tune would have my interest indeed!


Staying with a light weight aftermarket wheel either 16x7 or 17x7 can save 20lbs of unsprung rotational mass. (watch the tire weight also..)


A Light weight flywheel can save 10lbs and a light weight carbon fiber driveshaft is about 10-12lbs savings also.


A total savings of 40lbs. "They" say this can be some of the best weight you can lose.

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Old 02-22-2014, 11:39 PM   #39
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Losing weight is not hard to do, but how to lose weight and maintain (or even improve) the practicality of the car for daily driving?

How about light weight anti-roll bars?

I think all US models come with 18mm solid bar in the front and 13mm solid bar in the rear. Cusco offers a 16mm solid bar for the front and a 14mm hollow bar for the rear. Cusco said its light weight bars are just a stiff as OEM ones and I agree.

That should reduce weight by another 2, 3 lb.

Or lug-nuts?

I use Muteki open-ended lug nuts for my Enkei RPF1's. The Muteki nuts only weigh 25g each, vs about 70g for the OEM nuts. Nearly 0.5lb (of unsprung weight) saved per wheel.

Or light-weight pulleys

A set of (5) light weight pulleys can save about 5lb.

My wife drives the FT-86 to work daily. I changed the pulleys without telling her (she thought I was just going to change oil and the anti-roll bars.)

Then she jumped up and down for almost a week asking what I did to her car. I finally told her. Then she told me the car felt so much faster and she was wondering what I did.

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Old 02-24-2014, 02:28 AM   #40
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You could always drive around with a half tank of gas... A gallon of gas weighs ~6 lbs so that's close to a 40lb reduction in weight.
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Old 02-25-2014, 12:09 AM   #41
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Yeah with the spare and the tools out, and about 3 gallons of gas in the tank (fuel capacity 13.2gal tank) we can save a cheap and easy 90lbs or approximately 3 percent weight savings.
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Old 02-25-2014, 12:15 AM   #42
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i feel like weight reduction for a daily car is kinda sucky. i feel like an aggressive alignment (and if you are really inclined, bushing and maybe springs) will make the car feel like its hundreds of pounds lighter.
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