[HappyMint]

Thanks Chet!

 

[HappyMint]

You got the rear seats in there right, but just removed the assembly behind them? Oh and what exhaust?

 

[HappyMint]

Yes. Ams DP, UR TP, AMS CBE



Not really worth it to spend any more on another battery unless they arent hugely expensive

So you could save another 10 some day if you get a Ti exhaust. You're not far from the 2900's!

I have heard the front / rear crash beams do not exist on the Euro or JP cars, do you have any links to proof of this?

 

[HappyMint]

this weight saving wont bring down an evo IX to 2600lbs.
Mine was 3020 lbs on Robi scale stripped an caged. It was an Evo IX RS 2006

I've seen and Evo 8 at like 2300 pounds. It was so light it was illegal to be used its auto x class, they had to ADD weight. Wish I could find that video, someone posted it here at one point. Keep in mind, it didn't have a cage, or any real safety equipment.

you can still get two-piece rotors (i didn't see them listed so sorry if you already have them) and save another 20 pounds of rotational mass.

Of course, but those are $$$.

 

[HappyMint]

Wow, I fucking love you. That is exactly what I want.

Can you tell me how much it weighs?



true story

If you get that heater make a how to!

 

[HappyMint]

Well things like driveshafts, flywheels, etc. are supposedly roughly equal to 10lbs for every 1lb. But after reading about lighter wheels on a physics forum, it seemed like the difference is only about half of that. but then you have to consider each lb per wheel is multiplied by 4 due to having 4 wheels.

These numbers are just made up. 10lbs, 2lbs, 5lbs. No one really knows, it differs per car and it differs based upon which component of the drive train is replaced. Yes they make a bigger difference, but lets not just throw around completely unverified numbers, we don't want to mislead people.

 

[HappyMint]

The truth is it's not easy to save a lot of weight. Chet was able to because he removed all of his crash beams from front and rear of car, and all the doors. That was his major weight savings. Everything else adds up little by little, but if you feel like you want to keep your crash beams (like me), then it's hard to justify the work / inconvenience of the other weight saving mods since the weight saved isn't all that significant.

Your best options for weight savings without compromising the safety of your car or making it very inconvenient (no ac, etc) are:
- Exhaust (40lbs savings)
- Suspension (20lbs savings)
- Seats (60ish lbs savings)

Those 3 combined can save you like 120 pounds which isn't insignificant.

 

[HappyMint]

for sure. the shipping weight of my driver seat was 55 pounds, and the passenger was 68. both of my seats and rails together weigh less than 30 pounds. and my seats are only FRP

Ok so please show me the EXACT seats and rails you have. LINK. Cause I can't find a seat on earth that is less than 15 pounds including rails and I've been looking non stop. Trying to save like 70 lbs from seats.

 

[HappyMint]

Buddy club seat rails and bride FRP Zeta 3 seats. I bought the rails off of a member, and the seats on ebay, so no links.

TY.

 

[HappyMint]

Weighed my stock GSR seats today with rails.

Stock Driver seat = 42 pounds.
Stock passenger seat = 48 pounds.
Recaro pole position racing seat with buddy club rails = 24.2 pounds.

Traded seats with a friend for the weekend. I may end up getting these, but it depends on how things will pan out.

 

[HappyMint]

24.2 lbs for 1 seat?

Yup. The pole positions are listed as like 15lbs each online, so I recon the rails are about 9 pounds.

From Recaro website:

Seat shell made from glass fibre reinforced plastic (GRP), weight approx. 7.0 kg (without sidemount and baseframe), lumbar cushions, belt guide for 4-point belt, seat can also be used with 3-point belt, integrated headrest.

Most seats I've been able to find are all pretty much 15ish pounds without rails, at least all the FIA approved ones I have found are. When they are carbon fibre or a carbon fibre kevlar shell I've seen FIA approved ones as light as 7-8 pounds.

This has been an eye opener. If you get a 2.5 pound lithium battery for 200-300 bucks, you essentially save as much weight as you save from replacing BOTH front seats, at least in my case this is true.

 

[HappyMint]

Obviously weight of the seats depends on what seats you have. I have the most basic GSR seats, non heated, cloth, not leather, and that is how much they weighed.

 

[HappyMint]

Chet, so I just got this new battery installed. It's a Shorai one, Lithium Iron. Had no issues and it only weighs 4 pounds! Saved like 28 pounds over the stocker, and it's still like 8 pounds less than most light weight batteries. Had the car on, idling, high beams on, AC on max, and music going and the battery voltage was very slowly ticking down. As soon as I got the revs up to like 1200+ it started going back up again. So no issues. Had the car idling today at the Auto X course for 45 minutes straight (it was so damn cold) with no issues. Worth checking out! I think they run about 250 bucks, I got mine used for 125ish, but either way, when your current battery goes, look into one of these!

They have 330 CCA's, it's been pretty cold all week and had 0 issues. I've heard with the Lithium Iron batteries, if it doesn't start right up, turn on the head lights for a minute, it will warm up the battery, and car would crank. That being said, I run a thicker oil, 10w-30, and at 30 degrees outside it had 0 issues starting right up =]

 

[HappyMint]

Personally, I don't see the point in CF doors outside of motorsports where you have a roll cage with side impact protection, they would be incredibly dangerous in event of a side impact. AFAIK, the CF doors are shells, they don't have crash beams in them.

 

[HappyMint]

If your worried about safety sure but honestly its not going to make a difference if you get hit hard enough to kill you. You will be dead either way

No offense intended, but did you do crash testing comparing the OEM doors and the CF ones that I didn't know about? Otherwise, I don't know how you can make such a claim.

 

[HappyMint]

Yeah, obviously chet has no issue with driving around in a death trap lol.

 

[HappyMint]

Lmao, blasphemy

Yeah those front, rear, and door crash beams were just "recommendations" from the factory. Thats why they all have a "quick release" button to just pop right off... with a torch.. LOL.

 

[HappyMint]

did you?? so how can you make your claim... taking everything out of the stock door to transfer it over i will say i wouldnt place my life in the hand of crash bar anyway. i would count on my a and b pillar first.

Pointless to argue, I don't want someone's death on my conscience b/c they read on the forums that carbon fiber is a space age super strong material that saves weight and offers protection, or that there is no more danger in running CF doors over the OEM ones. Yes, people DO think this.

Point is, OEM crash beams are in the doors for a reason, and to say that they effectively do nothing and might as well be removed since "you're going to die either way" seems like a good way to get someone else killed who doesn't know better. It's also totally unfounded, unlike my statement which is based on the standard set by the automotive industry and regulatory committees whose sole job is to make sure our vehicles are safe. So if you want to throw all of their collective knowledge out of the window because the A and B Pillars exist then feel free, but I for one am not going to tell everyone else that it's perfectly safe to remove crash beams that were obviously put into the vehicle for a reason.

 

[HappyMint]

Yes chet, I've heard that about the front and rear crash beams as well. Though I personally wonder how big of an impact the door beams have on reducing the costs of insurance claims. Not only this, I think, particularly with in-door beams, it's hard to argue you're not losing protecting by cutting metal bars out of your doors. This debate has never been about the front or rear beams, only about the safety of CF doors in side impact crashes.

Many of us will gladly sacrifice protection to go faster, thats just how it is, and I'm fine with that. You're your own person and can make your own decisions, but to suggest un-crash tested CF doors offer equal protection to the rigorously tested OEM ones makes me want to put in my .02 cents before someone goes out and drops 4 grand on equally safe (untested) CF doors.

If this happened, look at the video below. I'm fine if you want to drop weight to go faster, in fact I support it. All I'm saying is lets just set the record straight, it's not just as safe:

 

[HappyMint]

and i never said they were safe in the first place. i said if you get hit hard enough to die from side impact your going to die reguardless if there stock or cf.

Does that not imply an equal level of safety (or lack there of)?