I was looking but so far have not found a thread dealing with this. Less i am blind.

I wanted to see if anyone has dyno'd a stock Z with out the use of the AC belt at all. Just wanted to see if there was any if slight gains. I have been thinking about taking the belt off for a while, but then also thought that i do not want to have the AC freeze up with no use as well. So im just wondering.

reason is i really dislike when the damn AC pops on when i turn the air on. I did pull the fuse, but then again if i never use it why shoul di have to waste some weight spinning it. Figured i could help the engine spin a lot more free this way.

I do have the light weight pulley's as well.

 

1. ac effencience has gotten way better than the 60,70,80,90 to a point were it doesnt really effect your car hp at all.....

 

Yes, and not on purpose. No, there are no gains.

This is the nicest reply you're gonna get.

 

im not asking if it gets hp gains at the wheels. im talking to the crank. because if you eliminate the ac you free up weight put on by spinning the ac. so although it will be extremely minimal say maybe 2 hp just for a quicker response purpose. Not asking because i believe i am going to go faster.

 

No gains in response. I am a performance driving instructor.

 

dude it not worth the time. hey how about you do a before and after dyno and then tell us what you get

 

there's no point in removing the belt, as the pulley spins freely when the a/c compressor is not engaged. So you're not really freeing up much of anything.

 

^ +1

 

so the benefit of putting on a light pulley is saying that it is only freeing up distributed weight for a free spin. say less weight to rotate does not effect any aspect?

that is all i am saying that the engine will work slightly less harder is all.


with the ac on the z does have a drag feel that is very noticeable. Kind of the reason i disliked when it went on when i didn't notice.
but that is with any engine for that matter. all im asking is that completely removed the engine it self may feel a tad more responsive in the sense that your freeing up the crank from spinning both belts and all the spin is just going to the one. cause no matter what the crank is sill trying to spin the ac belt regardless. which is adding a lil pressure.


i might do a before and after just to see. maybe something will come out of it.

 

I pulled my entire A/C system, including the motor and all the lines, more for the weight - about 35# total - than the hp though - car makes 266rwhp/250rwtq NA and weighs 2980# with roll bar.

 

^ yeah but i know i wont see anything to the wheels. i am just talking about allowing the engine to work a lil less harder.

 

What kind of racing do you instruct? Did you ever race or track your own 350, and do you race/track/instruct currently in your 240? I ask because I've never seen your name before, Vitaly Ivanchenko, in the various events I've attended, so maybe there is some underground I don't know about which could give access to even more - otherwise private - events?

 

Need for Speed perhaps?

ok so then a dyno probably will not show any gains or loss.

so then all it will probably do is just allow the engine to sweat a lil less when whipping it around town if that at all.

 

Sorry I came on so strong mr. other racing instructor/mod/punk upsetter. I attended Jim Russell. I instructed at various private events. I am one of the originators of AllStyle.org. Sorry I don't waste my money on tracking a street car. Never heard of you either.

 

^^ who hasn't heard of scott the forum. wow it just got personal

 

the a/c belt weighs a few ounces

the a/c pulley weighs ~ 1 lb

Neither one are hardly taxing the crank whatsoever. The reason the engine can feel more responsive with a lightweight crank pulley is that you're reducing anywhere from 60-80% weight from a piece that has fairly substantial weight in the first place. Just as if you remove weight from the flywheel.

 

Jeez! I was simply asking if you had an "in" to other events so I may inquire about joining up and what kind of car you drove in case I had seen you before. You said you instructing in racing, I simply asked what kind? Who hosts these private events?

So what DO you race or track then, something else besides your 240SX or your 350 before you sold it? I don't track a street car either!

https://my350z.com/forum/8006425-post59.html
BTW, we should do that soon!

 

All true.

If he removes all the AC components though, he will free up about 35# from the front of the car, at the expense of AC of course.

https://my350z.com/forum/7809508-post672.html if you're curious. . .

 

very true, removing the entire a/c system is a different animal altogether. A bit better efficiency for the radiator as well

 

Absolutely, with this big honking condenser out of the way (4#!)!