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View Full Version : Okay WTF is the diff between a 3057 and a 3157??



lowryder99
03-02-2004, 11:43 AM
So no one has really given me an answer to this question yet.

I hear the 3157's are brighter,

see my truck calls for a 3057 for stop, rear turn's, and brake lights.

99+ call for 3157.

The guy at our local hopup shop said ever since clears were around he's been putting 3157's in 88-98's.

I found some posts saying they will do the opposite of what you want, (brakes are dim, running lights are bright)

So does anyone have any real experience with the two lights? They look identical from the outside....:cussing:

CKTA
03-02-2004, 11:45 AM
I run both in mine (by accident) and they worked the same/good for me. :dunno:

Joe
03-02-2004, 11:48 AM
Okay WTF is the diff between a 3057 and a 3157??
100 :read:









:LOL: :crazy:

Try this link:
http://www.sylvania.com/auto/llspecs.htm

46and2aheadofme
03-02-2004, 12:19 PM
Originally posted by gmcjoe
100 :read:


dang, beat me to it! :gmcjoe:

lowryder99
03-02-2004, 12:41 PM
joe

a) you= teh :assclown:

b) thanks for the link but it doesn't really help any?

SBCStang
03-02-2004, 02:01 PM
Goto this link..

Sylvania (http://www.sylvaniaautocatalog.com/sylvania/pro_idminilam.asp)

Scroll down and click on the S-8. A chart will come up and give you all the specs you want and some you don't need.

Chris

lowryder99
03-02-2004, 02:09 PM
After that reading I still don't know the diff....

I suck:piggy:

CKTA
03-02-2004, 02:15 PM
Originally posted by lowryder99
After that reading I still don't know the diff....

I suck:piggy:

it don't matter...like i said...i've used both.:crazy:

lowryder99
03-02-2004, 02:20 PM
well I figured okay fair enough, ckta has used both....ill drop it. Then 5-7's post instilled more fear of the unknown again:LOL:

CKTA
03-02-2004, 02:21 PM
Originally posted by 5-8CHEVY
And tell me again how many Cats a 305 Vortec has? :LOL:

One A-hole! :looking::LOL:


Originally posted by lowryder99
well I figured okay fair enough, ckta has used both....ill drop it. Then 5-7's post instilled more fear of the unknown again:LOL:

Use the right one, but you can get away w/ the other.:LOL:

Mark
03-02-2004, 02:21 PM
The difference between the two is this:

3057- 32.2 kandle power
3157- 32.3 kandle power

but the 3157 will last twice as long, if you want a long lasting bulb go with a 4157

lowryder99
03-02-2004, 02:26 PM
Well 3057's are damn near impossible to find here in colored or led bubls so I got 2 sets of 3157's....thanks guys:head:

CKTA
03-02-2004, 02:31 PM
Originally posted by lowryder99
Well 3057's are damn near impossible to find here in colored or led bubls so I got 2 sets of 3157's....thanks guys:head:


You're welcome!:LOL: :crazy: :LOL:

GnatGoSplat
03-02-2004, 03:35 PM
According to this link (http://www.litebulbs.com/appchart_minilamps.html), the only difference is the park lamp filament. It's 3cp (8.26W) in the 3157 and 2cp (6.72W) in the 3057. They are both 26.88W 32.00cp on the brake/turn filament.

97Silverado
03-02-2004, 03:40 PM
Originally posted by 5-8CHEVY
And tell me again how many Cats a 305 Vortec has? :LOL: BWAHAHAHA!!!! I still get a chuckle out of that!!:LOL: :LOL: :LOL:

LOWGREEN1
03-02-2004, 05:49 PM
Originally posted by lowryder99
Well 3057's are damn near impossible to find here in colored or led bubls so I got 2 sets of 3157's....thanks guys:head: Give me a couple of weeks and I might have a set of LED light bulbs you can have. I am going to try to install my LED lights on my tailgate again. I say again (don't ask) I'm a sucker for punishment....:D

lowryder99
03-02-2004, 05:51 PM
Dude that would be so awesome....you rock brotha:head:

Like I said, I want LED's but try finding a set that works in Canada:devil: , everything is either APC or just something foreign that blows fuses.

LOWGREEN1
03-02-2004, 05:55 PM
I will tell ya what, Since I all ready have the regular filament bulbs, I will go ahead and send the LED bulbs to ya. I will mark which ones are the brake turn/signal bulbs and which ones are the running lamp bulbs. I'm assuming you already have a flasher for the LED bulbs?? Just PM me your address again. I lost everything when I bought a new computer..

lowryder99
03-02-2004, 06:01 PM
err flasher? whatcho mean?

Ill pm you my addy....

Did I mention you rock? haha

LOWGREEN1
03-02-2004, 06:20 PM
Originally posted by lowryder99
err flasher? whatcho mean?

Ill pm you my addy....

Did I mention you rock? haha You will need a variable load flasher. Your stock flasher will make the blinkers flash really fast or not at all. You should be able to pick one up at your local auto parts store for very little $$$

Phoenix8936
03-02-2004, 07:30 PM
Why not upgrade and find yourslef some LED ones..they last way longer and are much brighter...find them all over online or at local part stores

lowryder99
03-02-2004, 09:44 PM
How do I wire this flasher in dude?

LOWGREEN1
03-02-2004, 09:47 PM
Originally posted by lowryder99
How do I wire this flasher in dude? You will take your factory one out and plug the new one in. Mine (as yours should be) was under the dash right behind the ash tray maybe a little to the left. You might need to take off the lower body panel ( the one under your steering wheel) to get to it, or at least it makes it easier. It not hard at all.

LOWGREEN1
03-02-2004, 09:50 PM
Your factory one will look like this.

lowryder99
03-02-2004, 10:19 PM
Dang...didn't know that was all there was too it.

Thanks bro!

GMSMALLBLOCKGUY
03-03-2004, 06:59 AM
OK lte's see if this ASCII diagram makes any sense to you.

3057 and 3157 both fit the same socket with 4 contacts and have two elements one brighter than the other. The thinner element is the brighter one.

Lets number the contacts for the socket.
Looking at the bulb from the bottom,

-----2--------4-
|_1_____3__|

On a 3157 the brighter element uses the inner contacts 2&3
on a 3057 it uses the outer contacts 1&4.

As near as I can tell that is the biggest difference.
Using one in place of the other will work.
If you compare a 3157 on one side and a 3057 on the other,
When you hit the brakes both will have two elements on so they will both get brighter, let off and both will have one element on.

But one will be brighter than the other and one will have less difference in brightness than the other between brake light on or just parking lamp.

GnatGoSplat
03-03-2004, 07:45 AM
Originally posted by GMSMALLBLOCKGUY
OK lte's see if this ASCII diagram makes any sense to you.

3057 and 3157 both fit the same socket with 4 contacts and have two elements one brighter than the other. The thinner element is the brighter one.

Lets number the contacts for the socket.
Looking at the bulb from the bottom,

-----2--------4-
|_1_____3__|

On a 3157 the brighter element uses the inner contacts 2&3
on a 3057 it uses the outer contacts 1&4.


I don't think that's true. For one thing, it's always the thicker filament that's brighter. The thinner one is the low power park lamp filament.

Also, if the contacts were as you say, the operation would also be reversed if a 3057 were replaced with a 3157. So if the park lights were on, the bright filament would be lit. If the brakes or signal were on, they would light up the low power filament. So basically the signals or brake light wouldn't work at all at night and would be very dim during the day. I don't think that's the case because everyone says the two bulbs are physically interchangeable.

Every spec sheet I've seen says it's just a difference in brightness of the low power (park lamp) filament.

CKTA
03-03-2004, 08:05 AM
Originally posted by GnatGoSplat
I don't think that's the case because everyone says the two bulbs are physically interchangeable.



They are, I've done it...and for all I know I still may have one in there like that.:crazy:

GMSMALLBLOCKGUY
03-04-2004, 05:28 AM
I stand corrected.
Thanx for telling me. After you all said that I decided to test em rather than go by pics on the web.

HERE is the 3057 continuity on the outer contacts
http://members.lycos.co.uk/gmsmallblockguy/taillightsFSC/3057-outer.jpg

And the 3157
http://members.lycos.co.uk/gmsmallblockguy/taillightsFSC/3157outer.jpg

3057 inner
http://members.lycos.co.uk/gmsmallblockguy/taillightsFSC/3057inner.jpg

and 3157
http://members.lycos.co.uk/gmsmallblockguy/taillightsFSC/3157inner.jpg

here is the 3157 with the socket removed just to sho that the wires dont cross in it.
http://members.lycos.co.uk/gmsmallblockguy/taillightsFSC/3157clear.jpg

strangely enough the element with less resistance is the brighter one :think:

GnatGoSplat
03-04-2004, 07:55 AM
Originally posted by GMSMALLBLOCKGUY

strangely enough the element with less resistance is the brighter one :think:

Yeah, that's strange, and would indicate that the 3057 has a brighter bright filament. The difference could be corrosion on the contacts, age of the bulb, or manufacturing tolerances? Who knows, but 3157's park lamp is supposed to be brighter.

A 3357 should fit the socket and should have an even brighter bright filament, it's 40cp instead of 32. Might be a good idea for anyone who has tinted taillight covers.

CKTA
03-04-2004, 07:58 AM
Originally posted by GnatGoSplat
Who knows, but 3157's park lamp is supposed to be brighter.


Once the bulbs are in the red housing......you'd be hard pressed to see a differance.

lowryder99
03-04-2004, 10:08 AM
Holy crap smallblock, ask and you shall receive. Thanks for taking the time to do that!:head: