Ive only been to the drag strip once with my 05 G35 sedan 5AT..I was not fully satisfied with my runs and was considering doing some weight reduction...I thought about removing the rear seats and removing the spare.. Is it worth the time to actually take this action.. will it make a difference in my ET, if so approximatly by how much.. are there any other easy ways to shave off some weight from my car...(best- 15.062 @ 94mph..2700ft)

Considering the spare doesnt weigh more than 20lbs. its not much of an issue, but if your **** about saving weight then take it out along with the back seat (never tried taking it out but cant imagine it would be too hard) If you want to lose some more weight, try taking out the passenger seat. You can get the coupe middy and save around 15-20lbs. and get some light weight 17" rims (enkie or 5-zigen FN01R or gram lights) with some racing slicks and that will save you a bunch of rotational mass. There's plenty you can do to save some weight but you wont lose more than 200 maybe 250 lbs overall.
-GP-

15 second at 94mph? that's abit slow .. wanna post the slip here?
for weight reduction, the rear seats are not heavy but the passenger seat is
like ~100 pounds while the spare alone should be around 50 lbs not 20lbs
(~25 for rim and ~25 for tire) and also the jack and ****...

Take out the jack and jack tools while you're at it.

Don't forget the gas in the tank....run with 1/8 tank or less.

Sand off that pesky paint job, and who needs a dash?

Seriously bro, you didn't buy a race car. Of course stripping things out will make you a little (and I mean a LITTLE) faster, but what's the point? What are you trying to achieve?

To markedly improve your times through weight reduction you're going to need to remove HUNDREDS of pounds, not dozens. It depends on what you're shooting for.

In my case, I'd see better gains by reducing my OWN weight or letting a skinny guy run my car through the lights.

LOL^^^ Have you ever taken out our spare tire or any temporary spare tire??? If you're talking about a full size spare then yea it'll weigh around 50 but a temp. spare only weighs 20-25 lbs. I said 20lbs. because i have the temp spare.
-GP-

At the track I run with 1/4 tank of gas, no tool bag (20lbs), no all weather floor mats (20lbs), no spare (29lbs), and no other junk in the car. Overall, the car is about 130lbs lighter than it is on the street fully fueled with driver. My belief is to remove all the easy stuff. It can't hurt and only takes about 5 minutes to do.

If i run a faster time then last time i know some hood rats that'll give it up to me.

Normally per 100lb of weight reduction you should run a .1 faster. Now you have to ask yourself, is it worth trying to remove 100lbs to save a .1 of a second?

Wow, that's just sad.

Don't forget the back seats come out easily. Just pull the tabs located between the front of the seats and the carpet . Although that is only 5-10lbs at most.

While you're at it, remove the hood, trunk lid, 4 doors, windshield, rear glass, strip the ac, radio, pull the carpet and headliner, glove-box door, armrest, power-port caps, armrest tray, visors, airbags, plus all the suggestions from the others, lose some body fat through starvation diet and post your times--you will be at 14 flat!!, but not looking too cool

Somebody removed everything from a sentra 1.8 liter I think. They had it down to a frame basically and it would do a 14 flat.

+9999999