Light brightness changes with engine speed - Team Camaro Tech
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post #1 of 8 (permalink) Old Jun 9th, 11, 08:29 PM Thread Starter
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BJ
 
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Light brightness changes with engine speed

Just got the 69 on the road and noticed that the headlights dim slightly when it is at idle and get brighter when the engine speeds up . Is this normal with these cars ? Everything is new, alternator, regulator, battery, wiring, etc. The regulator is the solid state type and has no adjustments.
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post #2 of 8 (permalink) Old Jun 9th, 11, 08:43 PM
kt
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Re: Light brightness changes with engine speed

normal, the alt has less output at slower rpms.
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post #3 of 8 (permalink) Old Jun 9th, 11, 09:31 PM
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Re: Light brightness changes with engine speed

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Originally Posted by kt View Post
normal, the alt has less output at slower rpms.
I was going to say the same thing.....

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post #4 of 8 (permalink) Old Jun 9th, 11, 10:49 PM
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Re: Light brightness changes with engine speed

If you want headlights and dash lights that are brighter. Without dimming. Check out MAD electronics. Do Marks new system. Takes the load off of the old chevy wiring. I can't explain it all. But I did do the New System. The difference is night and day. A lot of info if you do a search on MAD.
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post #5 of 8 (permalink) Old Jun 10th, 11, 07:43 AM
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Re: Light brightness changes with engine speed

Quote:
Originally Posted by tgifford5 View Post
If you want headlights and dash lights that are brighter. Without dimming. Check out MAD electronics. Do Marks new system. Takes the load off of the old chevy wiring. I can't explain it all. But I did do the New System. The difference is night and day. A lot of info if you do a search on MAD.
He has new wiring and parts. It would seem he has the correct voltage going to the headlights.

Mad Electrical shows how to add relays to the headlights instead of going thru the headlight switch.

I would get a digitial meter and read what voltage you have at the headlights and coming form the alternator. Check it at idle and when revving the motor to about 2000 rpm.

A new wiring system should not need the relays. Usually they are added because of old wiring / headlight switch.

I do add them to all my cars that I rewire, even with new wiring. Newer Halogen headlights pull more amperage which the stock headlight switch will not handle.

Mike
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Last edited by prostreet69camaro; Jun 10th, 11 at 08:27 AM.
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post #6 of 8 (permalink) Old Jun 10th, 11, 08:09 AM
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Re: Light brightness changes with engine speed

If you want to maintain the stock look with out hacking up your original wiring,you can get the conversion kit that converts from the stock external voltage regulator to the later model internal regulator.I had the same issue you have with my 69.I bought the conversion kit for 15 bucks and a new alternator from a 75 or later camaro.The difference is night and day.No more dim lights at idle.

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post #7 of 8 (permalink) Old Jun 10th, 11, 08:56 AM
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Re: Light brightness changes with engine speed

Quote:
Originally Posted by Matt 69 View Post
If you want to maintain the stock look with out hacking up your original wiring,you can get the conversion kit that converts from the stock external voltage regulator to the later model internal regulator.I had the same issue you have with my 69.I bought the conversion kit for 15 bucks and a new alternator from a 75 or later camaro.The difference is night and day.No more dim lights at idle.
X2

I just swapped in a 63A 10si internal reg alternator. The voltage output at idle is noticeably better. Easy swap also.


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post #8 of 8 (permalink) Old Jun 10th, 11, 11:49 AM Thread Starter
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Re: Light brightness changes with engine speed

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Originally Posted by BPOS View Post
X2

I just swapped in a 63A 10si internal reg alternator. The voltage output at idle is noticeably better. Easy swap also.
How is it wired up? Were there any modifications to the wiring plug for the external regulator? What is done to this regulator plug?
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