Hello,
I've had the Bosch Platinum +4 spark plugs in my car for like 2 years. I want to change them, I called two places and they told me that they will give me the price for the Bosch Platinum +4 Spark Plugs but I shouldn't be putting them in my 97 Sunfire 2.2. Both of them said that I should be only using ACDelco. My
flag went up but what gives? Bosch makes the plugs for my car, and I've had them in my car, and now I shouldn't be putting them in my car? I love the Bosch ones because you don't have to gap them and they are a little cheaper then ACDelco. What should I put in?
Thanks for ANY input,
Jay
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They are right you shouldent be using anything outher than the AC Delco Platinum tips, the factory ones, the only time you should use different ones is if you are doing up your ignition or your engine or something like that, outher than that if you use anything outher than the delcos you will be loosing performance and making your car run and idle rugh, the AC Delco plugs also come pre gaped they are a bit more money but its worth it, you will notice the car run smoother and better on idle, the AC Delco plugs are actually a very good plug <br>
lol i have the cheap dollar ones from bosch, have 15 thousand on them, car idles perfect and i get over 30mpg on the highway, boy they must really suck..
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Its not how fast your car goes....its how much nerve the driver has to push it that fast.
no spark plug is pre-gapped right. it may have been gapped right at the factory but once it was dropped during shipping that gap was lost. anyway you can use them but theres no need. wont help you any. the single plats are plenty good enough. <br>
I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
A/C delco platinum plugs are the way to go, and when i replaced mine they were ALMOST gapped perfectly, i probably would of been fine even if i didnt change the gap.... <br>
I had bosch platinum +4's in my car and they were good for the first 30k or so. Then the car developed a miss. I put new AC-Delco's in, gapped correctly, and the miss went away. I didn't notice much of a power increase with the +4's either. I'd stick with the delcos. <br>
denso iridium are prefectly gapped to stock spec out the box... i check all plugs before install...
theres no law or rule about you cant use another plug but acdelco...
bosch platinum +4 are gimmick plugs.... electricity takes the shortest path, same as lightning strikes, from a to b....
if prong #3 for example is the shortest path, thats the only path the spark will really take.
all you need is a one prong one electrode plug really.
gap it right, and do normal maintainence. <br>
The reason why they say to "stay away" from Bosch is because they have a higher resistance on the coil packs. Meaning, there is more resistance on the coil packs to push the spark through the plug basically. Sometimes coil packs will go out at 5k miles and sometimes it won't hurt them. Every car is different. That is why the say to use the AC Delco plugs, the spark can flow through them better. It also boils down to personal preference.
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if thats the case, iridium has less resistance than even ac delco, a smaller electrode and a cleaner spark. less material to travel through and a stronger material. <br>
I would say if it work for your car then why care about others? I have Bosch +4 on my car for over 2 years and it's still running great....don't have any problem so far. I used to have Denso Iridium in my car, it's as good as Bosch +4(IMHO) but with two times the price. That's why I stick with Bosch +4. It might not work with other people car, but it work for me. That's all it's matter.
<br>
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LoSo-LS24 wrote:I would say if it work for your car then why care about others? I have Bosch +4 on my car for over 2 years and it's still running great....don't have any problem so far. I used to have Denso Iridium in my car, it's as good as Bosch +4(IMHO) but with two times the price. That's why I stick with Bosch +4. It might not work with other people car, but it work for me. That's all it's matter.
true, but just stating a single prong plug is all you really need.
bsch+4;s are def more expensive than single prong bosch plugs, which do the same.
for me with an MSD i dont wanna chance running stock style plugs. so i just got something that can handle the current. but the denso;s do offer slightly quicker startups over any other plug.
all choice though, bottom line is, you dont have to use acdelco
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Thanks a lot guys! It's nice to see Event putting his 2 cents in. The guy is a j-body encyclopedia! I'm going to go with the ACDelco until some ignition upgrade. Also, does anybody remember what the factory plug gap should be at? I remember something like 0.06?
Thanks again,
Jay
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Dirty Muffins (Event) wrote:
true, but just stating a single prong plug is all you really need.
bsch+4;s are def more expensive than single prong bosch plugs, which do the same.
I read the article about Bosch +4 somewhere on the Internet 2 years ago about the advantage of +4 before I decided to put it in my car, but I can't remember where it is now.
To summary, they said when the Spark Plug got spark with over 10K volts under the high heat and pressure in the cylinder, the Plug( leg/ground electrode) will get really hot and will expand. At that time the gap that has been set will change, say from 0.5mm to 0.52mm. It will happen very quick, when it cool down it will get to the factory set. The advantage of having 4 legs on spark plug is when 1 leg get spark and expand, the others 3 will still cool and still be at the factory gap(shorter length). The electricity will choose the shortest length to jump. This way, there will be enough time to let them cool down and recover from the expand cycle. The other reason I remember is that if one leg is melt or have carbon built up, you still have others 3 to use.
(Sorry if you read it and get confuse, English is not my primary language).
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Denso Iridiums site says the plugs for the sunfire are gapped at .050, but the chilton manual says to use .060, which is right for the 98 sunfire se? <br>
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98' Pontiac Sunfire SE
oh and whats good wires to use as well as pack, where would be a good place to purchase them online aswell <br>
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98' Pontiac Sunfire SE
Jared: In your engine bay there is a label which has lots of info on it. There you will find the correct gap for your car.
i have seen a few and can say to never use champion or splitfire. <br>
chapter 10, yeah that's one away from 11
my .02...i wanted to see what bosch was like so i changed over to bosch platnum 4s and it seems like my car lost performance rather than gain anything.. the only difference i noticed was that the car ignited quicker. but i took them out and replaced them with ac delcos again. and ac delco as most of you say is pretty much gapped correctly, i would double check them before putting them in anyway
I have been running the Bosch +4 for 5 years now and have never had a problem. I did see a performance pick-up and my mpg is 33 on the highway and about 28 in town. Guess they work great in my car.
98 Z24
RIP Specks
I had +4's in for about 1 year and car never seemed right. Misfired and sputtered randomly. Changed to AC Delco ones and it runs a lot better. IMO.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
reasons why plus 4 and plus 2 are pointless....
Quote:
Q8. Why do some spark plugs have multiple ground electrodes?
A8. This is an attempt by the manufacturers to increase the service life of the spark plug. The ground electrodes can wear down rapidly in some engines. Tiny particles of metal are removed from the ground electrode each time the plug fires hence they gradually wear away. There is a misconception that a multi ground plug will produce mutiple sparks - this is not true, only the nearest electrode to the centre (i.e. currenty the longest) will spark, as that becomes worn, another electrode will become the longest and replace it as the sparking electrode.
Q9. Do my multi ground electrode plugs outperform single ground plugs?
A9. In most cases, no. The additional electrodes disturb the flow of gases around the spark plug tip and performance may even be reduced. In addition, for high performance applications the additional metal within the combustion chamber will retain more heat and may be more prone to detonation/pre ignition.
so basically its for those who will go a LONG time without checking, regapping or replacing a plug....
for anyone interested in performance or good maintainence on their car, you should be checking and regapping if needed your plugs every season (3 months)
plugs tell you how the car is running and def not something to be neglected...
theres really no reason or need for more than one ground electrode... electricity takes the shortest path, so until one path wears a larger gap, then it moves onto the next prong.... but the prongs that arent being used, basically sit in the combustion chamber and retain heat.
I just use autolite double platnums. Why? Becaus ei can get them for 50 cents a plug.
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