wo wo wo people hold on, it sure has to work better and all i agree, but think for a minute, mehran comes with a 34 or by max a 38 amp battery charger, even 1000cc alto comes with a 38 amp charger, so no matter how bigger the battery you put in, it will only be charger upto 38amp.. if you want those results, you're gonna have to put in a bigger denmo charger, probably some diesel car's. i checked with my electrician, he told me i could get a 65amp charger from bilal gunj for 3000rs with his fitting, i know my electrician is just a bit more expensive, but he works good.
Luckily mehran has much more space in the engine bay as compared to alto.. so its alot easier to fit it in, rest issue is to fit a 65amp battery in the hood, that is also possible with a little alteration, otherwise put the battery in the trunk.. and then seeeee the performance! with this setup you can even put in the heaviest stereo systems and you wont need capacitors! i assure you upto two 15 inch cervin vegas! 
since my friend had done that in his mehran! worked perfect! now if you dont want all that, put the stock size battery in, or if you want that for your satisfaction put a 48 amp battery and a performance ignition coil, and you'll see a considerable difference! BUTTTT for that you must also change your plugs to performance and put performance plug wires as well..
Remember dont ever put BOSCH 4 tip plugs in mehran, they give no performance! Get irridium or titanium!
Wooooops you have already added the plugs ok good luck with the rest of the setup!!
Annnnd if you take my seriousss advice, get a brake booster for your car, its easily available in bilal gunj, any mechanic can fit it, get the master cylendar removed and put a booster in it, that puts you in a lot saffffer position and you'll see one major difference in your braking power, and surprisingly it costs only 3000rs with all the fitting and all.
Drive safe, always fasten your seatbelts, if your car doesn't have one, get those immediately! Drive fast where one is supposed to, not in streets and dont cut corners! Dont over rely on car, always rely on GOD, and if you have general tyres in your car, change those to some good tyres, your braking and suspension both would improve by a 100%
if you are a student and dont have much budget all togather, then dont worry all the crap i wrote is just for your knowledge you dont have to put all that in tomorrow morning, go step by step, eidi by eidi, result by result, birthday by birthday! keep putting in stuff gradually!
I really appreciate your efforts, nice work done to mehran! i love mehran! i remember my good old days, when i used to cut corners on it, and trust you me, no car in the world is better than this car if you wana cut corners buttt once again, WAZARAT-E-SEHAT HAKOOMAT-E-AQALMANDANA says DONT DRIVE RASH!
