1034 vs. 1157 bulbs

[Christopher R.]

I'm getting my car ready for judging. My '62 should have 1034 bulbs in the parking and tail lights. But there are 1157 bulbs in there now. I believe 1157s are a little brighter than the original 1034s. The correct ZN332 flasher seems to work just fine with the 1157 bulbs. But I don't know if they are flashing slower or quicker than original.

Will a judge be able to discern that the wrong bulbs are in the lights?

(The correct ZN332 flasher works fine with all 1157 bulbs. But it will not work with a mix of 1157s and 1034s. So it must be all of one or the other.)

[Timothy B.]

Re: 1034 vs. 1157 bulbs

Christopher,

Any judge that knows better will pick the 1156 bulbs right up. With the original flasher, the 1034 bulbs will flash much slower at the correct speed.

The 1156 bulbs draw more amps because they are brighter so the original flasher opens and closes faster causing the flashing rate to be faster.

[Edward J.]

Re: 1034 vs. 1157 bulbs

Chris, I believe that if you are going for flight judging that as long as appear to work and flasher at somewhat the correct speed you should be okay, I think if you were going for a PV then flashing rate would come into play. what I did on my 63 was to use a 552 flasher with 1157 bulbs for operations check. And before the judging starts for the interior I just flipped to the correct flasher.

[Dennis O.]

Re: 1034 vs. 1157 bulbs

Chris, I believe that if you are going for flight judging that as long as appear to work and flasher at somewhat the correct speed you should be okay, I think if you were going for a PV then flashing rate would come into play. what I did on my 63 was to use a 552 flasher with 1157 bulbs for operations check. And before the judging starts for the interior I just flipped to the correct flasher.

Not trying to start anything; just curious. Is this allowed?

[Bill W.]

Re: 1034 vs. 1157 bulbs

1157 is a heavy duty 1034 . 1156 is a back up bulb .

[Timothy B.]

Re: 1034 vs. 1157 bulbs

Sorry, I ment to type 1157 not 1156. Bottom line is with the original flasher use the 1034 bulb.

[Dick W.]

Re: 1034 vs. 1157 bulbs

I stand to be corrected, but the amperage draw of both bulbs is the same and would not change the flash rate of turn signals. The difference in the bulbs is the filament and life

[Timothy B.]

Re: 1034 vs. 1157 bulbs

Dick,

There is a big difference in the flash rate using the 1157 bulbs with a stock flasher used on 1963 and earlier cars. The 1157 is a brighter bulb and draws more current causing the flasher to cycle faster.

I believe in 1964 the 1157 bulbs are used with a different flasher.

[Bill B.]

Re: 1034 vs. 1157 bulbs

1034 bulbs are 3 candlepower. 1157 bulbs are 4 candlepower.

[Bill B.]

Re: 1034 vs. 1157 bulbs

I have an old box of AC 1034 bulbs showing 12V 32/3 C.P. That may have been a misprint. All the Chevy parts books that I have list the 1034 bulb as 32/4 candle power.

[John F.]

Re: 1034 vs. 1157 bulbs

Bill, I sent you a PM!

[Harry S.]

Re: 1034 vs. 1157 bulbs

I've seen 1034 and L1034 bulbs, anyone know the difference?

[Edward J.]

Re: 1034 vs. 1157 bulbs

Harry, That (L) prefix is lumens I believe, that use to be a older part no. that were on older boxes of most automotive bulb boxes. Same bulb. If you found a L1034 chance are its a older bulb and likely I would rather have a older bulb than the chinise stuff of today.

[Harry S.]

Re: 1034 vs. 1157 bulbs

Ed, Thanks

Now I need to find 12 of them....

[Loren L.]

Re: 1034 vs. 1157 bulbs

Why not just throw caution to the winds, blow the budget for the next 12 years and buy two (2) 1034s?