guestNX

How much does our compressor and other a/c parts add to the vehicles weight, anyone know for a fact (From having done it) or have an educated guess? thx

Dave B

Why would you want to do that in a 4-door semi-luxury/semi-sports sedan

The compressor might weigh 10lbs, plumbing 3lbs, condensor maybe 10lbs.



Dave

guestNX

23 pounds so it's not exactly the end of the world... hmm

because the car is used more for racing than anything , i know , still a 4door but we'll see at that weight though i'll prob just leave that crap in there, i wonder about using power to spin it though? still prob. close to nothing.

thanks for the info.

JMAXIMA

i don't remember what else is run on the a/c belt... but if our water pump isnt on the same belt, just take it off. you can do w/o power steering and your alt. for a while. :-)

guestNX

again, do we have any idea of how much or any power would be gained by not spinning a/c, powerS, and alt. for a brief time ( couple passes on the track )
?

JMAXIMA

i wouldn't imagine it would free up more than ~5hp... but along with some other removal, it will add up eventually. but the only real way of knowing is just to do it and see.

95emeraldgxe

you need the alternator, your battery would die in like less than 10 mins w/o it......if you want downgrade it to a lower ampere one

guestNX

again, i understand not running alternator, power steering etc would suck on a normal basis... but for only 1-2minutes for those passes at the track...?

and 10 minutes wow i thought our batteries would last more than that w/ no alternator (but have no reason to back it up haha)

JMAXIMA

a track use only mod... on and off at the track... but yes, you won't get far w/o your alt.

Dave B

Okay, this getting a little crazy. Why would you want to risk the lifespan of you battery just so you can go .1 quicker (maybe)?

If you're really serious about removing weight from the car:

1) Dynabat battery 12lbs, you'll end up shedding ~35lbs from front of your car. These batterys are perfect for anything, but cold weather (change back to stock in the winter).

2) Yank the passenger and rear seat (~40lbs)

3) Yank the spare, jack, carpet, board (~30lbs)

4) Lightweight racing wheels and tires. 15X8s with slicks in the front, 15X4 with skinnies in the back

5) 1/4 tank of gas

All this listed above should drop you a solid .7 of a second (slicks help the most). I think it's a bit rediculous to go this far on a Maxima, but guys to do it. The only thing I yank from my car on race day is the spare. Becoming a better driver is the best mod of all.


Dave

CystumMax

http://www.stillen.com/sportscars_de...id=3345&page=9

Why don't you get one of these and keep your AC and Other stuff.


Unorthodox Racing Ultra Street (Ultra S) lightened under drive crank pulley. Made of lightweight Premium U.S. made 6061-T6 billet aluminum to ensure consistency of the material's strength and balance. Every pulley is inspected multiple times from machining to anodizing to stocking and finally at shipping time. If at any point a pulley does not pass inspection it is pulled from production. An average of 5 to 12 HP and 4 to 8 lbs.-ft. on normally aspirated engines and 8 to 16 HP and 8 to 18 lbs.-ft. on forced induction engines. Higher gains are possible. For example, a Nissan 300ZX twin-turbo saw gains as high as 37 HP and 45 lbs.-ft. on the dyno just buy replacing the stock crank pulley with the Ultra S lighted underdrive crank pulley. Power gains are obtained in two ways. First, and most important, is the weight loss. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of our gains are from weight loss. The rest of the gains are from underdriving, which accounts for about 15% of the total gains. Underdriving is not pushed for two main reasons. The main reason is to keep charging systems, air conditioning, power steering, and water pumps moving fast enough for every day driving. Second, not much horsepower is gained from extreme underdriving. In most applications all of the underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximize weight loss can be achieved at the crank where most of the horsepower gains are found. Many Ultra S pulley applications are available in the Ultra Street Sets (Ultra SS) which in most cases include all the accessory pulleys except for the A/C compressor. You can always upgrade to an Ultra SS kit with the purchase of the Ultra A pulleys. This Part is Black. Actual product may vary slightly from image.

nadir_s

are you trying to beat 12 seconds 1/4 mi ??

guestNX

UDP's, i dont know that i believe the hype on those.... i'll prob. try one someday, but hm some claim they are the best thing ever, then many others say no gain. Who knows?

and dynabat battery, very good idea dave b , thank you !
it is a bit rediculous to go that far on a maxima, but you know, it's fun haha

guestNX

quite possibly.

96BLUMAX

iTrader: (3)

Everything weighs 33lbs. The car will pull much harder in 4th and 5th. Also gains noticed in 3rd, probably in 1st and 2nd but the rev up so quick its hard to tell by seat of your pants. Also the belt on that side runs alt, and ac. You can get a new belt 350K4 and they will just power the alternator. The other side belt is ps, and waterpump. I would do this and get a lightened flywheel and a UDP. Then you will rev like no other. Have fun.

Oh and acceleration is much smootherer and seems to be quicker.

krismax

iTrader: (15)

Thats funny my friend took the acn off his del sol it was 45 lbs.
The pullys rob power, on a civic in turbo mag it gained 4 fwh with just power steering off, ive been driving for a month without mine when i get my engine swapped this winter i will put a electric pump on that i found will work like a charm. The power steering disconnected is a bigger power gain than my UDP was.To me.

96BLUMAX

iTrader: (3)

Cool, did you need a new belt for no PS Pulley? If so what size. Only prob is i bet you only know the size for with udp and i dont hav one yet.

krismax

iTrader: (15)

Actually the belt is still the same as stock, but that doesnt matter. You just cut it or take it off, but i warn you if you are not stronger than the average human you will not like it . I can still steer with one hand.

96BLUMAX

iTrader: (3)

So the belt will be the same with no pulley? Wont it be looser?

krismax

iTrader: (15)

The aftermarket and stock are the same sized but like i said you dont need a belt at all if you take it of. the belt just spins the PS. Trust me if you take it off you wont like it.

96BLUMAX

iTrader: (3)

Then what spins the water pump when thats gone?

krismax

iTrader: (15)

one of the chains in the timing cover housing.The PS belt is JUST FOR THE pOWER STEERING

dwapenyi

iTrader: (3)

The water pump is driven by the timing chain. Removing the belts only kills the power steering, AC, and ALT.

DW