HI i like to know about the expensive ignition coils that everybody talk about. whats the difference with regular coils. i know regular coils r about 40,000 V and expensive ones up to 51,000 V and more. How they work different. I keep thinking about it and i dont see how it can help a regular truck engine. i know on the high performance they do. but some of those engine run more than 5000 rpm. I really like to know more about it , i like to buy one if they work. i have an old 93 f150 with more than 370,000 mile on original engine. I dont want to gain more HP, ( i dont think i can with the old engine anyway), but i like to gain as many MPG as i can . im getting about 16 mpg regular driving and about 18 freeway. If some body can explain me more about the expensive coils and how they help the engine TY.

 

you get the performance coil, wires, and plugs... do a timing bump, and you'll incease miles per gallon, and gain horsepower... you never did mention what kinda engine you have or transmission?

 

sorry i forgot that part . it has a 5.0 l , auto trans. OK about the performance wires how many Ohms per ft. are those wires. are they different than regular wires. Spark plugs have to be hotter or colder. about the timming do u have to advance or retard. I dont tink i can do the timming cause the smog check. they dont let me pass it if it's wrong. and how many degres does the knock sensor let u move the timming Ty.

 

The timing bump shouldnt affect your emmisions check. The best thing to do is just go to summit racing and look around for the wire set and cap and rotor you want to go with...the key to the cap and rotor is BRASS...dont use anything other than that, brass is the best conductor for that. As for wires I would go with a 8.5mm wire set, MSD has good sets, but there are other brands that arnt as expensive. Now with the coils...the higher the volts the hotter the spark your going to have, I personally have the Pertronix 60,000v coil on my truck, its the highest volt coil I could find and is pretty affordable.

http://fullsizebronco.com/forum/show...ht=timing+bump

Go there, thats a good breakdown of what to do.

Your definietly not going to hurt anything by doing this, having that many miles you should notice a gain in performance and mileage.

 

is it a 2 wheel drive? i cant get over 12 and i have a 5 speed 4x4 with the 5.0. i havent done the timing bump yet tho

 

Having a stronger coil also puts less "stress" on the other ignition parts. A stock coil that is starting to crap out will put more strain on the system. Those strong performance coils allow a bigger and stronger spark to reach the cylinders. But like everyone else said, the benefit will come from pairing it with thicker wires and brass terminals on your dist. cap ,rotor, and spark plugs. and gapping your spark plugs. The plugs can handle a wider gap because the spark is stronger. The larger gap and stronger spark gives you a better combustion. Thats my laymans term way of describing it, thats how it makes sense to me.

 

myford Its a 2 wheel drive. I was getting about 13 mpg. I install electric fans and KN filter, it got better u can see my electric fans pics i post some here.

 

BigGreyBox i understand what u say about the stornger the coil it get better spark at spark plug, but by making the gap at spark plug biggeer it would put more stress on coil i thing. the bigger the gat the more volts and amps u need to jump the gap . i might be wrong .

 

farmer12 my coil should be weak by now. i have own my truck since 95 i havent change the coil ever. i think its time for a new one. i replace the cap & rotor as i need it but i get regular from Auto Zone nothing expensive. as for the wires i replacem about three years ago , i used to have 7 mm and they give me some 8.6 mm .so i have no problem there. if i get a higer voltage coil it shouldnt do anything to the ignition module. I post some pics of my wires. thats what i have now.

 

I feel another dr_bowtie's educational rant coming on....I can feel it now...

Stay tuned....