@abdkhan
YES I TRIED
as i told already that i am not so much expert,what i say & write is only according to my observations & experience nothing more( & may be i am 100% wrong) so please after my writing & my point of view , try to consult with other guys too
as far as u asked about my experience,yes i already tried & put 90AH battery in khyber & for this i didnot make any small alteration, i didn't do any minor changes( no changing of wire,alternator with high amperage nothing nothing)
I simply went to shop & asked same question which i posted here & also suggestions given by some members, that shop guy said me nothing to change & in 5min. my car was ready ,he just put 90AH bettery ,for this he put battery base little more flat by screwdriver( so that battery can easily sit on base) & after that my experience with this 90AH is much good uptill now
& before 90AH ( when 55AH battery was installed) around 2-3 months back i noticed 1 thing that whenever i put switch on "AC" & deck & deck ampilifier & my graphic equalizer, some fancy light inside my car& on my headlights,top barke light,central locking system etc. ( all at same time)then at that time my horn's loudness got little rough & change(little bit slow)
when I talked with auto electrician, he told that in khyber originally it has 1 horn only & that's also without "cutout" so by installing cutout & put 1 extra horn will make sound normal( may be u have 1 horn & water gets into it during service so may be sound changes)also he put position of horn change because in original khyber it was near left side indicator/bumper but he said that due to rain & water on raod, this position is not good so he put both horn near front grill near radiator & also put cutout,after putting cutout there came differnece but even then when i switch on all additional accesories at same time as stated above, then specaiaaly in Night ( b/c in night i opened headlights too) then i felt little lower sound from horn
BUT BELIEVE ME AFTER GETTING 90ah BATTERY, THIS PROBLEM SOLVES,now with all accesories on horn noise is normal
so if u will ask me ab. company then I WILL RECOMMEND YOU 90AH BATTERY FROM "EXIDE" COMPANY
& if u can afford liitlle more cost then try to go for 90AH Maintenance free /dry battery( acc. to my experience only, maintenance free battery are much better than acid/wet batteries)
actually how this idea /question came into mind:
it was around 6-7 months before also in my friend's coure,he had 36AH battery but 6-7 months before, he put 90AH battery,also he has mehran in which it was battery of 40AH,he also change this with 90AH battery
(in coure he put of EXIDE battery while in mehran he put maintenance free ) In both cars,he did no modifications/alterations etc.& he told me good experience
that's why i got impressed with this technique & last month when i was planning for changing battery so i post this topic( just to remove my confusions)
but uptill now all 3 cars(mine & my friend's 2 cars),they all giving best results without any modifications .