It's not THAT hot in Austin. Just goto the swimming holes or something, that'll keep you cool.

 

i havnt noticed anything but maybe its cuz i use it on the lowest setting..

 

I must have the perfect tC then AC is ICE cold, at least up until 98 degrees out, which is as hot as I have had it yet. The small displacement compressor makes it barely noticeable other than a lower idle speed.

 

when ac is on, my tC definitely does not shift as well as it does when it is off. I have the clutchmasters stage 1 clutch and it is a really difficult. I feel that I have to rev it a little higher for me to get a good grab. let me kno if you experience the same

 

The tC is starting to sound more and more like an bit more expensive sunfire...same deal with my car. A/C kills the gas too.

 

I've heard that having the A/C on robs you of almost 10hp.

 

its not just a tc thing....i think its a scion thing because the same thing happens to me in my box....the rpms drop a lot faster when the a/c is on for some reason so you have to rev it up higher. also i noticed that if you shift right at 3,000 rpms it'll shift smoothly but you can't really feel the power boost when shifting from one gear to the next.

 

If it's anywhere north of 85 degrees, you should be using "Recirc". If not, essentially what you're trying to do is cool every place around you by using hot air from the outside. Using the recirculate feature will put less of a strain on your a/c system.

 

Not sure if you know there is a service buliten out on the A/C in the Tc I got mine fixed call your dealer they should know whats up with it

 

Driving with the AC on is going to rob power from ANY car, regardless of what make, model, tranny, or motor. The AC compressor's pully is going to have a clutch on it which only engages when you turn it on. The extra load on the belt is going to suck power from the motor. I find that a more powerful motor attatched to a manual transmission makes it easier to shift and drive in general, so you're probably just noticing the power loss.

 

^^ Very good info. Of course, any car will be affected by this to some degree, and it will be even more noticeable on a 4 banger. Try driving a 4 cyl from 5 - 10 years ago before compressor technology was where it is today. The effect was about twice as noticeable.

 

Don't you people know that ALL cars lose power when running the A/C? Christ, people start threads like these and act like the tC is the only car in the world with a quirk common to all cars.

 

Adding an additional load on the engine to operate the compressor will constitute in a rapid decline in RPM's when shifting from gear to gear. To do smooth shifting with A/C during gear transitions, apply gas while engaging the clutch. In other words, reducing RPM rate of change and 5% clutch slipping . Be careful not to slip the clutch for more than 1 secs. otherwise you create additional wear on the clutch.

Remember, with the A/C on, the engine RPM's will drop faster because of additional load induced on the belt drive attached to the crank pulley so it is your job to reduce the high rate of RPM loss by giving it a little gas during gear transitions.

Hope this helps,
Dat Dude

 

I came from a cavalier..and when i used the a/c in that thing WOAH i sware the car wouldnt move. Going from that to the tC it's heaven. The tC to me in general doesnt seem to take much power or performance out of the car when i drive it. I mean it's not as bad as some cars out there. Granted it does have a little pull when you turn the a/c on but it's good for me, i still beat people up hills with the a/c on.

As for the shifting with the a/c on, i noticed that at first too but i got used to it, so now i shift smooth with or without the a/c on.

 

No way in Hell!! I had a cavalier, and you want to talk about a power loss. I would be on the highway, turn on the AC, and you would just feel the car die...had to push the pedal down another half inch to keep my speed steady. My tC is not that bad. There is a noticeable difference, but any car with AC will have some difference...it is loading the engine more.

Oh, and my AC is ice cold...I never have to use it on the coldest setting, and put it on one or two bars on the fan meter :D

I don't notice any difference in shifting either.

As for the Stage 1 clutch from CM... Performance clutches usually require you to rev the engine a little bit higher to engage them smoothly because of the higher clamping force of the pressure plate. It engages stronger than the stock clutch, so it kills the rpms faster when taking off from a full stop. Thus you need more gas to get it going (higher rpm).

 

Yeah i know cavalier's SUCK! CHEVY NO MORE BECAUSE THEIR POOR!

 

I take it those are the only two 4 cylinders you have ever driven? The tC is actually affected MUCH less than older 4 bangers by the AC. EVERY car is effected by the AC, it is just more noticeable on a smaller engine. I have had cavaliers, saturns, corollas, etc and the tC does much better than any of them with the AC on.

 

that is a bunch of fixtion.

sorry i couldn't help myself.

I guess this explains why the car feels "different" from time to time, I always thought I was just tired or something and not shifting properly. I found (inadvertantly) that the tip about adding a *little* gas while engaging the clutch helps.

 

4 cylinders suck in general w/ ac on. even worse w/ an aftermarket udp

 

Yet another reason aftermarket UDP's are bad choices. The # 1 reason is on cars with built in balancers. The UDP many times will not include this to reduce weight even more, which shows the design knowledge of their makers. Hmmm this crank was balanced from the factory, so lets remove that and let it slowly beat the mains out of the engine but, I am changing the subject,,, sooo