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Old 04-30-2015, 10:13 AM   #1
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Rear seat delete

Lately I have been wanting to reduce weight from my mustang. Today I am taking out the back seats. I saw some pics of a rear seat delete and it shows all the metal and wires under the seats. I looked up the rear seat delete on AM and it seemed to much for just carpet and some type of board. My question to you in what materials should I use for this "board"? I have found some carpet I am going to use, its just regular black carpet. What should the board be constructed of?
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Old 04-30-2015, 08:26 PM   #2
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Most of the ones I've seen are thin ply wood. I've seen guys make them in f bodies and what worked well for them is get some sheets of styrofoam so that they can get the shape right around the seats and body panels. Then trace to the wood and then cover in carpet.

Depending on how complex you wanted to go I've seen guys make raised deletes with storage compartments built into them too.


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Old 05-01-2015, 12:37 AM   #3
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Originally Posted by RaceRed3.7 View Post
Lately I have been wanting to reduce weight from my mustang. Today I am taking out the back seats. I saw some pics of a rear seat delete and it shows all the metal and wires under the seats. I looked up the rear seat delete on AM and it seemed to much for just carpet and some type of board. My question to you in what materials should I use for this "board"? I have found some carpet I am going to use, its just regular black carpet. What should the board be constructed of?

ply wood... i had one and they are junk.. your maybe saving 20lbs at the most.. i dont remember the rear seats being heavy at all... and you're gonna get increased road noise as well..
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Old 05-01-2015, 03:38 AM   #4
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You will gain less than 20 pounds of weight difference in removing the back seat; not really worth it. And as others stated, the road noise will increase.
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Old 05-01-2015, 05:19 AM   #5
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If you're like me, you're better off losing your personal spare tire (the one around your waist), then the 20lbs you'd save removing the backseat
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Old 05-01-2015, 06:09 AM   #6
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+1 on road noise. The new edges especially. that back seat cushion is a massive sound buffer. not much in weight savings, unless you just remove the seat and leave it like it is.
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Old 05-01-2015, 06:21 AM   #7
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Easy way to remove weight and get better MPG and perhaps more speed:

1) Remove parts that you think do nothing. Start engine.
2) Continue with step 1; if engine does not start and run, put last removed part back on.

Engine weight reduction mod complete.
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Old 05-01-2015, 08:03 AM   #8
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Here it is!


Still need to do the top. Ill have to do that this weekend.
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Old 05-01-2015, 08:21 AM   #9
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Personally I'm not a huge fan of rear seat deletes, being because increased road noise and little gain from it. But to each their own! It'd be wrong to tell you not to do this, your own car after all, right?
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Old 05-01-2015, 08:58 AM   #10
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The only reason I can see for removing the back seat is to put in an x-brace like the Laguna Seca edition of the Boss uses to stiffen the chassis.
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Old 05-01-2015, 09:36 AM   #11
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The only reason I can see for removing the back seat is to put in an x-brace like the Laguna Seca edition of the Boss uses to stiffen the chassis.
Yep! I am going to add a brace/bar back there soon!
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Old 05-01-2015, 09:59 AM   #12
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I love mine. Very clean and made of cheap ply board wrapped in carpet. Weighs 5 pounds total, my leather seats were 60 lbs. you definitely feel it when braking.
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Old 05-01-2015, 10:23 AM   #13
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If you remove all the seatbelts & seat mounting parts from the backseats you might pick up a couple extra lbs as well.
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Old 05-01-2015, 10:34 AM   #14
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If you remove all the seatbelts & seat mounting parts from the backseats you might pick up a couple extra lbs as well.
Thinking about it! Gonna remove the brakets for the top of the seats for sure. Might keep the seat belts just incase i ever need to put the seats back in. Are the belts locktight?
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Old 05-01-2015, 11:35 AM   #15
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Yeah.. They are. You'll take out every piece of interior you have to get the rear deck out and access to the seat belts. I just tucked mine as a safety thing in case I need the seats back in or for insurance purposes
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Old 05-01-2015, 12:02 PM   #16
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Yeah.. They are. You'll take out every piece of interior you have to get the rear deck out and access to the seat belts. I just tucked mine as a safety thing in case I need the seats back in or for insurance purposes
Good idea! Ya I don't wanna strip the back from everything just to get to the seat belts. Well took the seats out and when I get to the drags a friend is gonna keep my spare in his car. I'm curious to see if there is a time difference.
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Old 05-02-2015, 01:34 PM   #17
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I have to agree with the other guys. It wont do much in weight reduction. Keeping your car at a consistent 1/4 full of gas will reduce more weight than most any "weight reduction mod".
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Old 05-02-2015, 02:45 PM   #18
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I have to agree with the other guys. It wont do much in weight reduction. Keeping your car at a consistent 1/4 full of gas will reduce more weight than most any "weight reduction mod".

Keeping it 1/4 tank consistently will also burn the fuel pump up a lot quicker.


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Old 05-02-2015, 04:13 PM   #19
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Ran about .05 better without the seats lol or just got a better lanch
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Old 05-02-2015, 09:27 PM   #20
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Every pound does matter. I took out my rear seats and the spare and the jack at the same time and noticed a difference. I'll be taking out my sound deadening and going to race seats over summer, that should cut around another 80-90lbs.


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Old 05-04-2015, 08:16 AM   #21
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Every pound does matter. I took out my rear seats and the spare and the jack at the same time and noticed a difference. I'll be taking out my sound deadening and going to race seats over summer, that should cut around another 80-90lbs.


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Good seats are expensive! I think my next upgrades will be in the suspension department
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Old 05-04-2015, 09:43 AM   #22
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Keeping it 1/4 tank consistently will also burn the fuel pump up a lot quicker.


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Good point. Thats a possability. I should have put in there that i DO NOT recommend doing that all the time, but i idea is there. 3/4's of tank of gas weighs quite a bit; more than the rear seats. maybe even the front and rear combined (not sure how much they weigh but im sure its close.

However remove those rears, change out the heavy stock front seats and also get some lighter, smaller diameter wheels and you will lose a decent amount of excess weight, and rotational mass.
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Old 05-04-2015, 09:56 AM   #23
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It varies depending on various conditions, but for the sake of this discussion lets say 1 gallon of gasoline is about 6.5 lbs. Over 12 gallons, thats about 80 lbs. However, it is low, and near the rear axle, so not really detrimental as far as getting off the line, or traction is concerned, but a lot of weight nonetheless. Really you should be focusing on removing weight from the nose, but obviously low gas and removing rear seats are "free" mods.
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Old 05-04-2015, 10:02 AM   #24
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Good point. Thats a possability. I should have put in there that i DO NOT recommend doing that all the time, but i idea is there. 3/4's of tank of gas weighs quite a bit; more than the rear seats. maybe even the front and rear combined (not sure how much they weigh but im sure its close.
6.3 lbs per gallon. (fun fact, water is 8.3 lb per gallon.)
so a full tank of gas, 94.5 lbs (15 gallons, close enough)
3/4 tank about 71 lbs.
half tank, roughly 47.25.
quarter tank 23.6 lbs.

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Keeping it 1/4 tank consistently will also burn the fuel pump up a lot quicker.
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how so? i thought the pump was fine as long as gasoline runs through it? Or are you reffering to the habit of running out of gas to the point of engine shutting off?
Splash causing pockets of air?
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