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Old 12-13-2013, 08:11 PM   #1
1086
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Weight Reduction (budget diet) for daily/spirited driving

So my goal is to increase horsepower (using the OFT) and decrease overall weight without spending too much money. I hope this gives people some ideas. I do not plan on getting into track/autoX - I am a casual daily driver and on the weekend I enjoy spirited driving in the mountains/back roads/hills, etc. like I am sure many of you. I plan on keeping my stock wheels and tires for the time being. I understand the potential to drop the cars weight lower than 2,611.9 lbs but again, this is on a budget.

I am determining my 'budget diet' with reference to this thread: http://www.ft86club.com/forums/showt...ight+reduction

OEM Components to replace/remove:

OEM Battery - 29.6 lbs
OEM Driver Seat - 43.6 lbs
OEM Passenger Seat - 39.2 lbs
OEM Muffler - 29 lbs
OEM Spare Tire
- 25.8 lbs
OEM Trunk tools - 5.8 lbs
Rear Seat bases (2 pieces) - 6.2 lbs
Rear seat back (1 piece) - 15 lbs
Owner's Manual - 2.8 lbs

Aftermarket Replacements:
Braille Lightweight Battery
- 11.5 lbs
Sparco Driver Seat - 26 lbs
Sparco Passenger Seat
- 26 lbs
Berk Track Pipe (muffler delete) - 3 lbs

Overall Weight Reduction:
-18.1 lbs (battery swap)
-17.6 lbs (driver seat)
-13.2 lbs (passenger seat)
-26 lbs (oem muffler)
-25.8 lbs (oem spare tire)
-5.8 lbs (oem trunk tools)
-6.2 lbs (x2 rear seat bases)
-15 lbs (rear seat backing)
-2.8 lbs (owner's manual)
-130.5 lbs = total weight lost (roughly)

Stock Car Weight (w/ full tank) = 2,750 lbs.
Weight Loss
= ~130.5 lbs

FRS Dieted Weight (roughly) = ~2,619.5 lbs


Last edited by 1086; 04-28-2014 at 12:02 AM.
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Old 12-13-2013, 08:22 PM   #2
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It's your car, so by all means go for it, but I don't think the change in weight will be particularly noticeable on the street. And when you consider that you'll get increased cabin noise, lose the back seats, have no spare, louder exhaust (which might get you in trouble with the law), and have non-adjustable seats, I just don't know if it's worth it tbh
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Old 12-13-2013, 08:27 PM   #3
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A full muffler delete will be awfully loud, and I really don't think it's worth the tradeoff (especially given that you don't track/autox the car).
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Old 12-13-2013, 08:29 PM   #4
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Thats a good point. I understand the cabin noise will inevitably increase, but I don't think it will be horrible - especially since my music is up a decent level most of the time. The Sparco R100's say they can adjust, maybe you had another set in mind? Or maybe I am wrong that they can?

I appreciate your feedback and opinion - I was also wondering, you honestly think that the added horsepower from the OFT (+30hp give or take), complimented with 130 subtracted pounds will be un-noticeable?
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Old 12-13-2013, 08:31 PM   #5
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The muffler delete is already installed. I got it last week. It is honestly not that loud - especially when I pay attention to which RPM I am staying in. It has the potential to be very loud, of course, but the driver has control of the level - at least that is how it is for me.
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Old 12-13-2013, 08:32 PM   #6
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I have a quiet exhaust and driving with the seat down is more than noticeable.
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Old 12-13-2013, 09:36 PM   #7
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@campy hypothetically, with the shredded () weight, it would be like driving with 75.6% less of my own body weight sitting in the car. I imagine that reduced weight, met with adequate wHP increase, has to feel noticeable (even on backroads?) - then again I wouldn't know yet lol

@boredom.is.me I think that can be solved with a super light-weight symmetrical board (w/e light-weight material) to replace the 'rear seat backing (15 lbs)' - perhaps you could also add some sound proofing to make sure the sound is contained in the trunk rather than the entire cabin.

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Old 12-13-2013, 09:53 PM   #8
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That kind of weight reduction will only show up on a stopwatch at the dragstrip or autoX or road course, and only with a consistent driver. You will NEVER notice the change in performance on the street. Enjoy the car, forget about spending time/money/effort and making the car more of a PITA for a performance change you won't be able to feel.
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Old 12-13-2013, 10:03 PM   #9
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No point in doing all that removal. Also, you are modifying the sprung weight of the car. That's what is keeping the car planted to the ground when you are going bumps, potholes, etc. If you want to lower the weight, its best done through the suspension and wheels which are unsprung weight.
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Old 12-13-2013, 10:08 PM   #10
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@Bach415 - So in order for weight reduction to work you must first lower the car, but using coilovers or springs? And only a light weight wheel works? Why not the OEM set? Although I know each are 41s lbs. I guess shaving 10-15lbs off each wheel/tire adds up nicely :o

Also, is it a decent option to go with Koni's and some eibach sportlines or teins? or is that weaaaaaaak

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Old 12-13-2013, 10:27 PM   #11
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Stop eating.

You'll save money and weigh less. It's a win/win situation.
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Old 12-13-2013, 10:31 PM   #12
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185 lbs @ 6'2" ... I'd rather not weigh less and look like a rod. D:
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Old 12-13-2013, 11:00 PM   #13
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Cool thread, worthy of other's input.

Mine is that your budget is more robust than mine. I'd have a hard time justifying $450 for a Super B battery when I can save 20 lbs. vs. OEM for $150 with a Braille (Amazon).
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Old 12-13-2013, 11:14 PM   #14
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Good point haha. I overlooked the price of the battery I listed. I didn't realize it was that expensive. Ill change that - thanks!
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