Installed Bosch +4 plugs and Accel extreme wire with cap/rotor on my 1993 5.0.

Huge difference in seat of the pants feel. It feels like I picked up 25-30 HP.

The engine idles smooth and revs great, smoking the tires from a standing start is possible now. I still have a 48,000 volt coil on it's way from Summit racing too.

Just thought I would share my experience.

 

Probably because the new plugs were gapped better and not worn out. Bad plugs/wires can make a big difference, I doubt its just from the plugs, but we definitely appriciate your input (I just dont want 1000s of people to go off thinking the bosch plugs are a thing from god)

 

On my son's Torino, he had Accel Super Coil and wires. I changed dizzy, and plugs, still ran rough. Swapped out the Accel wires for some stockers from NAPA and it ran great. Had a couple bad Accel wires. They were only two years old and ran about 5,000 miles.

 

MustangGT221,

Actually my old plugs were in great shape. All of them were uniform in color and not very old. The plug wires were in good shape also, but stock style wires.

I replaced the wires with Accel spiral core wires.

The cap and rotor were stock style too and replaced with brass contact Accel product.

You're right that the plugs are not the only thing or everything. It's the whole system you have to consider. Low resistance wires, HIPO plugs, good low resistance cap/rotor. Many people think the stock stuf is just as good as bumping up to an upgrade, it's not and many of us know that. I've owned 35 cars and done plenty of customizing. One thing I've found that OEM products or stock don't always cut the mustard.

 

I agree...

 

those bosch+4 plugs don't really add anything other than longevity. Platinum tipped plugs don't conduct as well as copper, but they last a while longer. And the +4 electrodes are a marketing gimmick because you only use 1 at a time, you might see a difference if you had a tendancy to badly foul plugs. Not knocking your benefit, but the plugs are probably not involved in your performance benefit. I bet the wires/coil and cap did it.

 

Have to agree. Next time spend your money on 96 cent autolite's with copper cores. Can't go wrong. Remember copper conducts elect. the best, except for gold.
Glad to hear a little work go along ways.

 

You guys have your opinions on plugs as many do. Over the years I've conducted my own experiments with plugs and had good experice with multi tip plugs giving more HP, mileage, and throttle response. I'll say after careful analysis with splitfire plugs in 3 different V-8 vehicles that I've seen the results.

Anyway it seems time to leave this subject alone as it seems that and several other ideas I have always used to my benefit have caused trouble once again. One of those subjects that will can never be settled.

Take care and no hard feelings, but I think I'll go back to my other forums.

 

We're not trying to knock your opinion...I see no reason to leave the site because of something as simple as this. Everyone has their opinions and then there are facts. Just because we don't agree on this 1 thing doesn't mean you should feel we don't agree with anything you would say or do say. We would like to have you involved in our forums.

Stick around, I promise you'll find FTE the best Ford Truck site on the net.

Like I said before, I agree that it's the right thing to have good wires/plugs/cap/rotor (above stock grade) and that the materials you have purchased are good and better than a stock replacement. I just didn't want people to think that putting +4 plugs in their truck are going to net them 30 hp....understand where I'm comin from?

On forums like this, it's not only you I'm talking to, it's anyone who reads this information. I don't want people to walk away from this thinking untrue thoughts, so I (along with others) are trying to explain (not just to you) why that situation you experienced might have happened.

Wires are hard to determine their condition, the only way you know if they're any good is if they're relatively new. Sometimes if you spray water on them and it causes problems then you know they're bad, or if the engine runs bad, or they're dry..etc etc. Changing the cap/rotor/wires/plugs when they are old will gain you power regardless of if you used stock or aftermarket components. They are critical components to an engine. Now you may have gotten a little more power from the aftermarket brass stuff and the good wires (the +4's over stock plugs is a different issue) over new stock equipment. But regardless, you replaced some worn out parts that have a lot to do with an engines power output. Chances are your old parts were just that, old, and causing you to have poor performance. If you replaced them with stock components, I bet you'd have felt a difference as well (maybe not as much...but atleast something). Does it all make sense to you now? I hope you understand where I'm coming from and are not getting the wrong idea from us.

 

well thought out and put mustang, I agree, completely. If I added anything, It would sound dumb.

 

Plug wires are easy to test. Just measure their resistance with an ohm meter.

 

Well...i've broken the connector before which made a poor connection on the spark plug....but..I wasn't really trying to get into that a lot..oh well

 

different people get different results with different cars, don't feel discouraged, stick around like mustang said. All we can do is relate our past experiences to yours. I have met people that swear the +4's are the best things since sliced bread. But on the other hand i have met people with alot more experience than me that love coppers, and don't even look twice at platinums....still havn't met anyone that will shell out $12 a plug for Iridium.