Supra Weight and Reduction

SLEEPYDUB

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Who has weighed their Supra without weight reduction?
Who has weighed their Supra after weight reduction?
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ChrisD

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Wikipedia says 1570 kg in stock form, but I'd be interested to see what the real world figures are for sure. Might go get mine weighed at some point
 

kona61

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Wikipedia says 1570 kg in stock form, but I'd be interested to see what the real world figures are for sure. Might go get mine weighed at some point
I hear about 3315-3370 is about the right range. With weight reduction some have gotten down to almost the 3100's.
 

mas921

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C&D did, stock car full tank is 3372 lbs / 1530 kg
Base version should be bit lighter, no actual data on that though; yet.
 

JackieD86

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@JackieD86 Jackie Ding) might be able to help out with how much he has removed from his car...., he has stripped the hell out of his racing A90 and weighed a lot of the removed parts in the video... unfortunately it had a small accident, so I'mm guessing its still being repaired right now?


Between the interior panels and the muffler delete, I saved about 75 lbs total. The next step was the seats, but now that the car is totaled we kinda gotta start all over again!
 

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Between the interior panels and the muffler delete, I saved about 75 lbs total. The next step was the seats, but now that the car is totaled we kinda gotta start all over again!
I was watching a titan car video about their drag car, talk about the battery being insanely heavy and the seats. They shaved tons of weight there along with lighter wheels for better rotational mass loss. Im excited to see what you guys end up getting out of these cars. Especially now you are rocking a base model vs that premium. (im a subscriber haha)
 

JackieD86

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Should give an update on this thread as well. One of the moderators Guff (who bought my crashed A90) measured the battery to be 64 lbs. I just purchased a new lithium battery from Anti-gravity, as well as some new bucket seats and some carbon fiber bodywork. I will be adding more weight in with a roll bar, however, so we'll see how everything evens out. The eventual goal is to be under 3000 lbs with driver, but that's probably not possible ha.
 

Q8_TwinTurbo

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Should give an update on this thread as well. One of the moderators Guff (who bought my crashed A90) measured the battery to be 64 lbs. I just purchased a new lithium battery from Anti-gravity, as well as some new bucket seats and some carbon fiber bodywork. I will be adding more weight in with a roll bar, however, so we'll see how everything evens out. The eventual goal is to be under 3000 lbs with driver, but that's probably not possible ha.
JackieD86,

It is interesting to know what modifications you will be doing to your car. Can you share type of bucket seats, the actual Anti-gravity battery model and what carbon fiber bodywork you will be doing ?

Best of luck with your new car. I am a follower.
 

JackieD86

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JackieD86,

It is interesting to know what modifications you will be doing to your car. Can you share type of bucket seats, the actual Anti-gravity battery model and what carbon fiber bodywork you will be doing ?

Best of luck with your new car. I am a follower.
Iā€™m working with Sparco on the interior safety side and will be doing a pair of their new Evo QRT seats. I believe itā€™ll be at least a 30, maybe 35 lbs saving from each seat including the seat base (OE was 50 lbs each). Battery-wise, I was told their 19lbs 60Ah H8/Group 49 Lithium battery (H8-60-RS) would be a direct replacement for the OE 64 lbs one, but I went with the smaller, 11.7 lbs, 30Ah H5/Group 47 battery (H5-30-RS) for even more weight savings. Since width and height of the battery is the same size even tho the length is shorter, I think I can make it fit fine without custom mounts. CF bodywork, the only one thatā€™ll likely save weight is the carbon front hood with built in vents. This will be our own PhD Racing x Spage Sport product that weā€™ll be pushing hard, along with a ton of other functional but streetable aero parts. We are hoping to drop to maybe 15 lbs from the OE 37 lbs front hood, although the cooling properties will be the main area of focus for that. Weā€™ll see how much weight we can remove!
 

Q8_TwinTurbo

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Iā€™m working with Sparco on the interior safety side and will be doing a pair of their new Evo QRT seats. I believe itā€™ll be at least a 30, maybe 35 lbs saving from each seat including the seat base (OE was 50 lbs each). Battery-wise, I was told their 19lbs 60Ah H8/Group 49 Lithium battery (H8-60-RS) would be a direct replacement for the OE 64 lbs one, but I went with the smaller, 11.7 lbs, 30Ah H5/Group 47 battery (H5-30-RS) for even more weight savings. Since width and height of the battery is the same size even tho the length is shorter, I think I can make it fit fine without custom mounts. CF bodywork, the only one thatā€™ll likely save weight is the carbon front hood with built in vents. This will be our own PhD Racing x Spage Sport product that weā€™ll be pushing hard, along with a ton of other functional but streetable aero parts. We are hoping to drop to maybe 15 lbs from the OE 37 lbs front hood, although the cooling properties will be the main area of focus for that. Weā€™ll see how much weight we can remove!
JackieD86,

Thanks for the information Great choice of modifications.

I checked on the Sparco EVO QRT seat and they are listed at approx. 18 lbs

Sparco aluminum seat side mount bracket 90Ā° : 2.5 lbs per set (for each seat) x2 = 5 lbs total

Sparco steel seat side mount bracket : 5 lbs per set (for each seat) x2 = 10 lbs total


Note Couldn't find the seat bracket & double lock seat slider weight.
 
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Islindur

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Reviving this thread.
So there are few points for quick weight reduction:
-seats (~ -25kg)
-battery (~ -17kg)
-good set of lightweight wheels (~ -10kg)
-lets say Tomei titanum Type D dual exhaust (~ -15kg)

This is ~65- 67kg (~150lbs) removed mostly from back of the car. So it shifts the weight balance a bit to front. Wouldnt it introduce new understeer coz the whole car would be more nose-heavy? Lets add to that lowering springs (they lower the front usually more than back, again lower front = weight shift), wouldnt the car become notbaly more understeery?

Or weight reduction is overall bigger factor and it gives way more benefits and we can combat understeer with for example bigger front tires and square setup for track driving or softer front sway bar and medium rear bar ?
@JackieD86
 

Kiske

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Jackie did a follow up video quite some time ago with more weight reduction.


Wouldnt it introduce new understeer coz the whole car would be more nose-heavy? Lets add to that lowering springs (they lower the front usually more than back, again lower front = weight shift), wouldnt the car become notbaly more understeery?

Or weight reduction is overall bigger factor and it gives way more benefits and we can combat understeer with for example bigger front tires and square setup for track driving or softer front sway bar and medium rear bar ?
Lighter weight in the rear 'usually' means you will have more understeer on acceleration and more oversteer when lifting off or on the brakes.

You can combat this by tuning your suspension, via changing spring height and stiffness, adjusting front and rear tire pressures and sizes.

Typically though most of this is negated by the off balance of aero most cars run. A huge wing will tend to create a rear bias at speed, more than most production splitter/diveplane combo's will be able to match.
 

Islindur

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Lighter weight in the rear 'usually' means you will have more understeer on acceleration and more oversteer when lifting off or on the brakes.

You can combat this by tuning your suspension, via changing spring height and stiffness, adjusting front and rear tire pressures and sizes.

Typically though most of this is negated by the off balance of aero most cars run. A huge wing will tend to create a rear bias at speed, more than most production splitter/diveplane combo's will be able to match.
Thx, I saw that vid already :)
The goal is street car with some track work here and there for the weekends, so prob wont do huge-ass wing and big splitter since I need daily driveability, but thx for the tip on the aero. I just really enjoy lighter weight feeling in the car so exploring the possibilities here :)
 
 




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