What's the worst that could happen?? and other modding ?s I have

[bbjsw10]

Originally Posted by smwoodruff0908

So what do ya guys think? Any input about the FAS in automatic cars?

FAS? as in EOC, if so I would not going on what your owner manual says about short distances. The main thing about an auto is that when you kill the engine the tranny pump no longer puts oil through gear/clutches. A manual slings the oil no pump involved on most.

[swoody]

Ah, I see. I was wondering what was so bad about it... well it seems fine so far Do you think it would be bad just for short EOC up to stoplights? I don't do any EOC on the road unless I'm coming to a complete stop at the end of it. It's not really over long distances or for a long period of time or anything. Usually 20-30 seconds at most, sometimes a lot less.

[Andyman]

What I think is that it's usually not worth doing. Your car probably burns about 0.25 gal/hr of gasoline when idling. That translates to about 1.5 cents per minute if you pay $3.60 per gallon. Each time you stop your engine you will have to use the starter motor again except at the end of your trip. I estimate that replacing the starter costs $300 if you include a possible tow charge and lost time at work, and it last for about 10,000 starts until it needs replacement. This would mean that each start costs 3 cents. If these estimates are accurate, you would need to keep the engine off more than two minutes to save any money. When the engine is cold and running at a fast idle, it burns more gasoline so it makes more sense to shut it off if you have to stop for a while.

If you could use a small electric pump for the transmission fluid, the situation would improve because you could start the engine again by shifting into gear (with the car moving at sufficient speed) instead of operating the starter motor.

[swoody]

Well, I always stop my engine when I come to a stoplight I'll be at for more than 10 seconds. I only use EOC when I'm approaching these stoplights, so it's like just shutting off my engine a little earlier for the light whie I'm still rolling up to it. I figure this can't be too horrible as it's usually fairly slow moving, and for short distances (<.25 mile). So we'll see how it goes, whether or not I need to replace my tranny or starter any time soon (**knock on wood**)

[i_am_socket]

If someone figures out a reasonable way to bump start an automatic, let me know. I'm probably doing the worst stuff ever to my tranny and starter since I EOC at highway speeds for up to a half-mile at a time sometimes and always have to use the starter.

[swoody]

The way an auto tranny works, I don't think it could physically work to bump start the car. Or, if you do figure out a way to "bump start" it, I think the tranny may begin to cry, and then explode

The way I look at it, it's probably cheaper and easier to replace a starter than a tranny. But if you do blow your tranny, you can swap a manual one in instead