so i have been driving my daily driver a 95 sc300 2jzge 5spd........i cant seem to think how faster the car would be if i had a bit of weight taken off.........
Any suggestion?

I already took out my cd changer and my spare tire........

 

stock seats are heavy, so get some after ones

 

you could remove the engine, that thing weighs like 400 lbs

 

remove rear seat and passenger seat along with yours and just get an aftermarket one for you. if that isnt practical then you could try carbon fiber hood and trunk.

edit: the doors are also hella heavy.

 

My favorite topic.

This thread might help you to decide what you want to keep or dump.

https://www.clublexus.com/forums/sc-...wn-weight.html

and this

https://www.clublexus.com/forums/sc-...worksheet.html

Just search "weight reduction" you'll find many topics on this subject.

 

Why? It is a daily driver??? You think pulling a 10-lb CD changer out is going to make your car any faster? I am amazed at the threads I read on here daily.

How about saving the $1000 you'd spent on some weight reducing Bride seats and just slap a damn XS turbo on your car...

Jonny

 

get carbon fiber doors, they used to make it, not sure now LOL

Also CF fenders too

 

don't bother replacing any body panels except for hood and door. the trunk is already pretty light, and if i had to do it all over, i wouldn't have gone cf trunk. secondly, the fenders are already pretty light so no point in replacing those either.

 

nothing wrong with removing the cd changer and spare tire. I actually did it on my car, but then again, I didn't do it to save weight. Rather, I sold them for $300 total since I don't listen to CD's and since I already got two sets of tires.

To be honest, this whole weight savings idea is pretty fruitless IMO. Just from my experience, even massive weight differences don't do a hell of a lot. Just as a point of reference, try driving your car with a full tank of gas and with the spare tire+cd changer in. Then drive it again with a 1/8 tank (-100 lbs), no spare tire (-50 lbs), and no cd changer (-10 lbs). All together, that's a total loss of 160 lbs, pretty significant you'd think.

I can tell you when I drive on a low tank of gas today, my car doesn't feel that much quicker than the day I bought it. Maybe a tenth of a second quicker to 60 mph, that's about it. If you're doing this to make your car faster, there's a lot better options out there than weight reduction. The SC's were built like tanks, not Corollas. When you're starting off with a car that tips the scales at over 3600 lbs, even dropping 300 lbs off the curb weight isn't going to do much.

 

1st rule never take out ur spare its there for a reason and one day you'll miss it... Trust me I know from experience

 

Ive been researching for months about weight reduction. First conclusion Ive come to is 3000lbs is the least you can get the SC down to. Sounds like a good idea if you want a strictly track or luxury car with no luxuries at all.

Now if your looking to keep all that but lose weight id go with Cf hood,lightweight wheels and brakes. Losing 1lbs unsprung weight is like losing either 4lbs or 10lbs of body weight. Looking into that do some research into the suspension of road race cars.

Right now im running 17" rpf1s,coilovers and TT rotors with custom lightweight calipers. My estimate of my unsprung weight reduction is about 70lbs. Also, if my time to horsepower ratio is correct I should be running low 14s in the 1/4 mile with no body weight reduction. If anyone can tell me a real formula to figure that out it would be great

 

I've heard this argument about unsprung weight before. I too did a lot of research into it, but it too isn't all that its cut out to be, primarily because when you're dealing with centripetal force, the weight furthest away from center makes exponentially more of an impact on the moment of inertia. It's a linear scale when it comes to scientific applications, but in real world applications, it generally means that your tires make the most significant impact on rotational mass compared to your wheels, brakes, and other things closer to the center (usually 5-10 times more).

When seeking this route of weight reduction, having big, fat tires with a larger sidewall would technically be more beneficial. First off, in general lower profile tires are usually heavier, even when you keep the overall width and diameter the same. Further more, even if your lower profile tires are the same weight as stock tires, they would in theory still perform worse. This is because you are pushing the weight further away from center.

This is the unfortunate trade off when dealing with unsprung weight reduction. All things considered, the best application would be to put some fat tires on a set of 15" rims, but of course that would mean sacrificing your handling and cornering ability for better straight line performance.

 

+1 Johnny. Slap a turbo or two on it. FI is the great equalizer, and then some.

CF doors for the street are unsafe. Get T-Boned and see what happens. CF also splinters when in an impact.

the doors and seats are heavy. Put in light weight front seats, as stated in this thread, forget the rear seats, they hardly weigh anything, and be done with it.

Add the FI.

Ryan

 

So, how well did you do at reducing weight? I've add weights with speakers and dynamat so I'm looking to lose some weight on other areas.

What is the weight for oem wheels n tires?

 

Changing front seats is only option that sounds reasonable for a street DD.

Just boost the hell out of it