crash_me_over

My Feedback: (16)

Ok guys.....it's been stated that the OS #3 & #8 plugs are one and the same. Besides "physically" looking at them.....one in each hand....or in a picture.....who knows what the difference is between them?

http://groups.msn.com/AndysEHome/rct...to&PhotoID=300

kyokai2

Good question, the higher the number the colder the plug, and vice versa. The hotter the plug the thinner the wire, and vice versa. I would think that OS would use this concept also. Got any hard questions, that was for newbies!

crash_me_over

My Feedback: (16)

Nope.....You missed it!

Read it again.

it's been stated that the OS #3 & #8 plugs are one and the same.


That post was made here on RCU just recently. Now....newbies certainly would not know the answer to this question....and I am curious to see how many "experienced" RCer's will know the answer to this.

While they have different numbers.....the post said OS #3 & #8 plugs are one and the same.

Now.....how do we prove or dis-prove it?

}{unter

hey crash once you get a old #3 and a # 8 pull the wire out and check the lenght of them if that is different it makes the whole plug different. also check the size of it really good with the wire pulled out. If thats the same i see why there are any different than in the price

}{unter

crash_me_over

My Feedback: (16)

}{unter....That sounds logical to me. When I do get one of each that are used up....I'll do that.


Now...Is there anyone out there who "KNOWS" the real difference betwwen these two plugs? Don't forget to "READ" the post.

trey3670

My Feedback: (10)

ya know im pretty lost here on what you are looking for but heres how to check for wire differences without takeing one apart,if ya have a good meter,use the omhs to check resistance,the "colder plug" should have thicker wire thus creating more resistance right? i think heheh

crash_me_over

My Feedback: (16)

The "usual" way to see a difference in a plugs rating....is by the numbering of the plug, correct? According to another post just recently....the statement was made that the OS #3 & #8 glow plugs are the same plug?

Now doesn't that go against the "normal" logic of how we identify glow plugs? And if they are "one and the same"....Why does OS advertise then with the two different numbers?.....and at different prices?

Does anyone have "hard evidence" that these two plugs are in fact......the same plug?

}{unter

lmao trey3670 nope that want work lol becuase all the plug is a wire connected in parell so it burns like a light.

}{unter

kyokai2

I was not wrong, that is how they determine the heat range of glow plugs, I think whoever said they were the same is wrong. Why would they put different numbers on the same plug, and then charge different prices. Maybe there were design changes that make the two plugs appear the same but they are not the same, common sense. The OS #3 is a hotter plug, its a smaller diameter wire, they are so close to the same its hard to tell by looking but when both are lit side by side the #3 burns brighter, I checked it out. Crash, do you even know the right answer?

crash_me_over

My Feedback: (16)

Crash, do you even know the right answer?


kyokai2....I have wondered about these two plugs for some time....what differences there are between them. It's logical to "assume" that the thickness of the coils would determine heat range.....and as you said.....kyokai2....you lit them up with your glow igniter and saw the differences.

Now keep in mind.....I am not the one who said these two plugs are the same. I had read on another post where someone made the claim that they are in fact the same plug. I am merely trying to find out from fellow RCU posters if there is any truth to this claim? What I would like to know is: Where is the proof if this is true? It may seem like a ridiculous interest but then if it is true.....why pay the extra money for the same plug?


Anyone care to show us "real proof"?

kyokai2

Yea Crash Im with you, Id like to see some proof that OS is fooling everybody into thinking they are different when WOW, they are the same plug. I DONT THINK SO.

Bonefrost

My Feedback: (6)

I got some MC59 and a #8.
If it's an OS it will be stamped 3 or 8.
I like the OS plugs they seem to last longer.
Later.
BONEz'

Fast Guy

The OS #8 is just a heavy duty version of the OS #3. The life of a #8 in a properly tuned engine is nothing short of amazing. I raced a CV-r12 for 3 gallons of fuel on one #8 plug

mglavin

My Feedback: (31)

Are we talking about OS's #A3 and #8 plug?

Or Enya's #3 and OS's #8 plug?

I believe the primary difference is the material used for the coil. The internal resistance is an acceptable method to determine the reaction/reactive properties of the plug as well as the type of material, length and wire gauge utilized for the glow-coil.

I believe the Enya #3 and OS #8 use a platinum coil. I seem to recall Tungsten is also used by some manufacturer's.

Each manufacturer has a chart which suggest's the heat range and application of there specific plugs.

gubbs3

My Feedback: (1)

There's only so many things that can be different between plugs.

The differences we can measure are:
1. Length of wire
2. Diameter of wire
3. Volume of the inside of the plug

If someone would make those measurements and they turn out the same for both the A3 and #8 then we need to call up and beg O.S. to tell us what the coil is made up of for each plug.

trey3670

My Feedback: (10)

hey hunter
yeah its like a light bulb that way will work,because ya can measure the resistance in a light bulb thats how you do it its called a circut you have to have one to measure omhs

crash_me_over

My Feedback: (16)

mglavin....We are talking about OS plugs. If you go back to the "original post" and then read each post after that.....you'll see what the original question is that I am trying to find "hard evidence" on.

gubbs3....I agree with you. The "proof" should be evident by all three points that you have made.....as logic would have it!

Nitro Flash....I agree also with you about how strong the OS #8 plugs are. I have always had great luck using them. I do not consider myself to be "the professional" on "all" glow plugs....but seeing is believing....isn't it?

BONEz'.....Your expressing my thoughts as well. Identification is stamped clearly on each of these plugs as you can see by clicking on the link a few posts back that I have provided. And......OS #8 plug is my favorite plug. However.....I am currently using an OS #3 plug in my 2.5 TMaxx and it's running great! Starts easy....idles excellent...lots of power....no flame outs at all. To me....it "ACTS LIKE AN OS #8 PLUG".

I just wonder and would like to hear how that other person "knows" or thinks he knows that these two plugs are the same? OK.....if I'm sounding a little anal about this interest....just tell me and I'll go enjoy the reliability of my OS plugs and act like they are "not the same".

}{unter

oh yea good thinking trey3670... thats right you can sorry

btw try it let me know what it read, if u have a meter lol

}{unter

Homebrewer

My Feedback: (8)

Many elements influence a glow plug's temperature range, but primary is the thickness, length and composition of the wire used to form the coil. It will be impossible to find out anything about the composition of the wire because most manufacturers keep it a secret, but the wire can certainly be measured. Other factors that affect a glow plug's temperature include the size of the hole in which the wire is installed, the type of plating used on the glow-plug housing and the material the glow plug's housing is made of.

I'll take the OS's word that there is a difference between the two plugs. I use whatever plug works best in my engine regardless of the price.

If an OS 3 works well, use it. If there is no difference in our engine between an OS 3 and an OS 8, then use the cheaper one.

}{unter

wow if they last 3 gallons lol mabey i shouldnt have bought this many ...... got 200 $ worth of glow plugs lol


}{unter

Karl the Mechan

...asking OS their opinion ?
Either via e-mail or snailmail or whatever?

It is afterall, they who make those plugs and thats what I'd do if it was for me to wonder. Which it's not, I'm afraid.