Question on alternator output
Had a P0622 code. Checked the battery and replaced it as it was 4 years old. Found the nut on the starter loose by about 3/4 turn. Tightened that. Everything was great. Idle was about 13.8 volts at idle and up to 14.2-14.5 volts while driving.
Today, while sitting in the parking garage with the AC blasting I put the top up and noticed it dropped down to about 11.5 volts momentarily. I guess I am now paranoid. I need reliability. Time for a new alternator? |
I had the same issue and was seeing a service charging system on my DIC. Changed to a Mechman alternator and the problem disappeared as the alternator puts out a constant 14.5 V all the time.
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I went with a power master and saved $ as opposed to the mechman 15 volts at the alt at idle
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Check voltage on cabled and on battery, is there any voltage drop? that little ramp piece on cable clamp broke on mine. causing this voltage drop because of cable being loose. I only found out later that the ramp piece is available after replacing cable. It could also be corrosion of cable not visible to you.Also check alternator output.
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All cables are tight. Everything was checked when I replaced the battery and CKS. Everything is super clean and no corrosion present, even on the ground cables.
It seems that when several high demand accessories are used the alternator output drops. I ordered a new alternator. I enjoy working on the car and I need it to be 100% reliable because my daily work commute is 100 miles and I don't need any hassle regarding a no start issue |
Is there an optional higher output alternator for the Corvette?
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Originally Posted by LS WON
(Post 1599741914)
Is there an optional higher output alternator for the Corvette?
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Originally Posted by worcestervette
(Post 1599741779)
All cables are tight. Everything was checked when I replaced the battery and CKS. Everything is super clean and no corrosion present, even on the ground cables.
It seems that when several high demand accessories are used the alternator output drops. I ordered a new alternator. I enjoy working on the car and I need it to be 100% reliable because my daily work commute is 100 miles and I don't need any hassle regarding a no start issue I agree with changing to a Mecman......I went with the 170 A unit and no more low V situations. |
Originally Posted by wayback
(Post 1599743180)
If this drop happens at idle while several high demand accessories are used it is normal for the OEM Alt.
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Originally Posted by doomi
(Post 1599742955)
There are a few options. I just bought a 240 amp Mechman alternator to drive some of my power hungry gear.
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Originally Posted by LS WON
(Post 1599745216)
Does it fit right in Corvette with no modifications?
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Originally Posted by doomi
(Post 1599746552)
It drops right in.
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Originally Posted by LS WON
(Post 1599746868)
Where did you get this from and cost? I wonder what is the rating of standard 2005 Corvette alternator?
Your 05 would be 110 amp out of the factory. They moved to a 140 amp oem alternator in later years. |
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Originally Posted by Silver c6 z-51
(Post 1599734132)
I had the same issue and was seeing a service charging system on my DIC. Changed to a Mechman alternator and the problem disappeared as the alternator puts out a constant 14.5 V all the time.
Normal, since the OEM Valeo 160amp alternator only puts out about 16 amps at idle. So when you have the A/C on, it turns the raditor fan on that is drawing about 16amps itself, and the other part so the car drawing amps put the battery into a draw state. As soon as you get going again (rpm increases), then alterntor puts out more amperage and will catch up with the total car needs, and recharge the slightly drained battery. As for better alternator, it's a 6 phase unit over the 3 phase of the stock alternator, which will put out about 60 amp when the car is idling isntead. The billet 6 phase alternators can be found here. And again, not what the alternator can put out when fully spun up, but what ampere that the alternator can put out when the RPMS is only 600 instead. https://www.corvetteforum.com/forums...w-pricing.html |
Originally Posted by Sox-Fan
(Post 1599748237)
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I'm in South Carolina. l have no idea if they do installs as I am rather far away to think about having them do it. Call them and ask. Or better yet, do it yourself. It's not hard, you don't need to lift the car and use any special tools.
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Originally Posted by Sox-Fan
(Post 1599755390)
I'm in South Carolina. l have no idea if they do installs as I am rather far away to think about having them do it. Call them and ask. Or better yet, do it yourself. It's not hard, you don't need to lift the car and use any special tools.
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Even though it is regulated, can you have to much output causing premature battery failure? What is the output of a mechman when it is up to speed?
With the high output is a larger gauge wire required or suggested from the alternator to battery? |
Originally Posted by hrt vlv
(Post 1599766175)
Even though it is regulated, can you have to much output causing premature battery failure? What is the output of a mechman when it is up to speed?
With the high output is a larger gauge wire required or suggested from the alternator to battery? As for the wire, I don't know, but I've not heard anyone mention having to do that. |
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