Plug and wires

[luminator]

I am doing a tune up on my car and i need new plugs and wires. I am just wondering what would be the best type of each to get. I currently have a homeade intake with K&N filter, 2.5" exhaust with dynomax mufflers and no cat, transgo shift kit and going to be doing the 13 degree cam fix when i get my timing belt done


Thanks

[RednBlack]

Bosch 4 Plugs and Magnetor wires. Seems best for me. Not Cheap!

[dykz34]

Don't use Bosch +4 plugs in this motor. The threads on the plug aren't long enough to have the electrode fully extend into the cylinder. (That's bad)


I run NGK TR-5's and have had ZERO problems. (Plus they are only $1.50 each!)

My car has some generic 7.5mm "performance" wires on it since I bought it in February of 2000... Over 40k later, they are still fine. (Just food for thought)

[bud36light]

Depends on how deep your pockets are. If you subscribe to the stock story AC plugs and stock wires will get you many turns onthe odometer. If you dont care about how long they will last go with a performance set. BTW dykz34, had no idea NGK made a plug for this motor.

[pocket-rocket]

Also with the waste spark ignition system on our cars, the +4's do not last long at all. I have heard anywhere from 5k-15k. Not good for what they cost. I have the AC Delco Rapidfires in both of my cars.

[RednBlack]

Don't use Bosch +4 plugs in this motor. The threads on the plug aren't long enough to have the electrode fully extend into the cylinder. (That's bad)

I'm not an expert on these engines by any means,but I am a machinist. I just checked my new +4s (#445 against my old ACs (R42LTSM) on a comparator, less than .002" difference in the threads. That can be expected on multiple machining processes. Well within tolerance. The electrodes are shorter by .097". I am assuming this is by design due to the centerfiring of the plug. As far as longevity, I don't know yet. They have only been in 2 weeks. But if you are right, I will go to the AC Plats. And yes, I did cut the weatherstrip. Changed wires too, back to Magnecor 8mm.( My old standby) Rerouted over the top. Did the job in 20 minutes. Only reason I am posting this is I couldn't believe a manufacturer such as Bosch would screw up a simple plug design. I figure if I spend $5 a quart for oil, $6 a plug isn't bad. Not made of money, but I love my car! (My wife don't get $5 a plug)

[dykz34]

I'm basing this off of what I have heard--I'd never spend that much on plugs to measure them. No sense in spending the money on the Platinum Delco's either. They all do the job the same.

[RednBlack]

Just my opinion, I did the measurements. Didn't cost me but 5 minutes. I prefer to keep the best in my car, that's all. I happen to like Ramen Noodles with a little sour cream.

[Lyle's GTP]

You can get NGK iridium plugs they can't be a bad investment. If you want a top of the line plug that is. But the guys are right, all spark plugs are basically the same, except some will last longer. However the Plus 4's and 2's have a different design. If you consider electrical theory into the design, it is flawed. For example, the electrical arc or spark will jump the gap of least resistance. So unless all the ground electrodes are of exactly equal length you will only have spark across one electrode. Even if they were all the same length, it would probably only work once than the electodes would then be slightly burnt and not all be the same anymore. At any rate the extra grounds there only hinder the spark by blocking it from the mixture. So in my opinion a single ground electrode is best. From that point it's only materials, and how long they last compared to price.

lyle

[Anonymous]

I run Autolite(.99$ each) plugs and magnecor KV85 wires. You won't notice gains from plugs unless your's are bad. Plugs are plugs. The only reason I am running good wires is becuz I needed new ones anyways.

[4spdz34]

I run Autolite(.99$ each) plugs and magnecor KV85 wires. You won't notice gains from plugs unless your's are bad. Plugs are plugs. The only reason I am running good wires is becuz I needed new ones anyways.

if u have kr and u run a colder plug u could see a gain

[Mitch DOHC]

i have rapid fires and have had no problem as all with them.... and they seem to perform very well... espically with my aftermarket coils

[RednBlack]

You can get NGK iridium plugs they can't be a bad investment. If you want a top of the line plug that is. But the guys are right, all spark plugs are basically the same, except some will last longer. However the Plus 4's and 2's have a different design. If you consider electrical theory into the design, it is flawed. For example, the electrical arc or spark will jump the gap of least resistance. So unless all the ground electrodes are of exactly equal length you will only have spark across one electrode. Even if they were all the same length, it would probably only work once than the electodes would then be slightly burnt and not all be the same anymore. At any rate the extra grounds there only hinder the spark by blocking it from the mixture. So in my opinion a single ground electrode is best. From that point it's only materials, and how long they last compared to price.

Bosch was making plugs before you were born. You are pushing 40,000 volts. There is no difference in the electrode length. It's a spray, uses fuel very efficiently. You ever look at a Bosch +4? Read this.... Yah plugs are plugs. http://www.boschusa.com/AutoParts/Sp...PlatinumPlus4/ I really don't care if you use if you use cheap stuff on your car, I prefer not to.

[4spdz34]

those bosch plugs are junk. u could get the same performance out of a single platinum plug. electricty is only going to flow throw one path so it doesn't matter if there r 4 ground electrodes. and copper plugs are better for performance than platinum. platinum is only for longer life

[RednBlack]

So you can't or don't read. 40,000 volts finds whatever ground it can. In this case it is the 4 electrodes. It does spray the power. NASCAR racers want it, but since Bosch is a Foreign company. they consider it "Not Stock". Hence "Stock Car" That's why they use Autolite. Hey,it's just my opinion. Not going to argue. Use the AC plugs and wires. They are not bad. Just not that good. You can go to Autozone or your equivilent.