how to get more power from a stock car without any add ons, by keeping the car stock

Not sure l understand the question..you want more power by not doing anything????

l guess you could put 104 octane race fuel in there.

then you need ''take-offs''

Get a hole saw and start cutting holes in the interior body sheetmetal, this will lighten it. get rid of your spare tire., remove the seats except a racing seat for the driver only. Take out the A/C (by a shop it is illegal to do it yourself) remove the dash.

This will lighten the car by 500lbs, and you will get increased speed.

Or just read this article..
http://thirdgen.org/sheddingpounds

Nothing, putting race fuel in there may ruin your o2 sensors and you wont gain anything cause your car isnt made to run on it. Only thing maybe is taking weight out of the car making it lighter but thats it.

No free lunch.you can not keep something stock by modifying it, anymore than a girl says she is saving $$$ by spending $$$(unless something is really needed).

Make sense?

Have your cake and eat it too. Really not possible in Ways you will notice behind the wheel.

Higher octane fuel - Need to remap ECU for significant gain.

K&N air filters may give you something although you will need a dyno to tell.

Keep your tire pressure up and your windows this will help with drag.

Really not much for you if you want to stay stock your gonna be stock.

What do u mean specifically? Do u literally mean that u would not change anything at all- as in u would not change the muffler, the exhaust, or anything else?

Well, even if u did not change any parts at all, u could still do a few things to increase power. Here r some things u could do:

1. Use Royal Purple engine oil, or any high quality synthetic motor oil
2. Install a K&N air filter
3. Use high performance spark plugs (like Bosch), & use high performance spark plug wires (like Nology, MSD, Taylor, Accel, etc).
4. Keep the car tuned up all the time with high quality parts
5. Install a lower temp thermostat, like say a 160 degree thermostat (but first consult a mechanic about this- ur car may or may not be able to use a lower temp thermostat- u did not say the make, model, year, or engine size of ur vehicle)
6. First, consult a mechanic, & ask about timing tweaks or adjustments. But be very careful! Make sure that if u do increase the engine timing, that it is done in such a way that would not damage the engine!
7. Use ''Outlaw'' brand fuel additive
8. Use Premium gasoline (if ur car is compression requires it)
9. Make sure all the tires r properly inflated.

And so forth.

Good luck!

dont use royal purple unless you plan on racing, the viscousity is too low for normal day to day driving and may not provide enough protection, unless you live in a very hot area. and about the best u can do while keeping it ''stock'' would probably be to buy a flasher and program it for 93 or whatever the highest octane pump gas near you is.

when l was a teenager, we would flip the air cleaner lid on the carb. not sure if it added more power, but it made the impala sound tough when we stepped on the gas.