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For that price and the other available part numbers I don't see why any C3 dude would do anything else if going LS. Compact, tight, and don't have to deal with the annoying heater hoses being against the upper control arm alignment bolt.
63
I agree, we installed others before the Holley and they in the end cost more money because of having to make stuff fit correctly. The Holley setup is the only way to go.
It seems that the alternator isn’t a plug and play solution if you go this route though. In the two videos I’ve watched, one modifies the unit by shortening the rear post and the other just doesn’t run the PWM setup connection at all because the units with a side post use the wrong connector.
Part of what interests me about the mid mount is that it’s easier to service a water pump failure on road trips if I haven’t had to modify the stock F-body unit by drilling and tapping. But the mid mount unit seems to carry its own unique part problem with the alternator. Does anyone have a plug and play solution other than the unreasonably priced Holley unit? Sub-$200 ideally?
scuderia_kannan
Not that I thought cutting the output post short and bolting on a lug was a big deal (wouldn't keep me from using because of all the other benefits) but I did run into this today while just snooping around:
2019 chevy silverado alternator.
See the 8:50 mark or this youtube video...
It seems that the alternator isn’t a plug and play solution if you go this route though. In the two videos I’ve watched, one modifies the unit by shortening the rear post and the other just doesn’t run the PWM setup connection at all because the units with a side post use the wrong connector.
Part of what interests me about the mid mount is that it’s easier to service a water pump failure on road trips if I haven’t had to modify the stock F-body unit by drilling and tapping. But the mid mount unit seems to carry its own unique part problem with the alternator. Does anyone have a plug and play solution other than the unreasonably priced Holley unit? Sub-$200 ideally?
Thanks for that video. Looking at that made me wonder, why is not common to just use one of these two pin to four pin converters, and then buy an alternator with a side mount post
(which is what he used in the video), and then if your alternator ever breaks down on the road you can just swap it out with a factory part without figuring out how to modify it far from your tools at home?
Am I missing something in terms of fitment in the Holley bracket or compatibility with an LS1 ECU? Can you still use a stock PCU to do the pulse width modulation via one of the 4 pin to 2 pin converters?
Seems like this is the most plug and play way to go on a budget, right?
Last edited by scuderia_kannan; Nov 29, 2024 at 08:58 AM.
scuderia_kannan
Looked up the holley part number (197-303) for the alternator on that mid-mount-kit on summit racing and then checked on vehicle applications. There's tons of them. Just go find one of these puppies. Used on multiple vehicles from 1997 through 2016. Take a peek.
Now let us go to rock auto and find the alternator for that same 6.2L 2015 Corvette we used for the waterpump "cartridge"..... and ...there it is....several choices....and if you look within at the alternators you will note that they are 2-pin connector types. https://www.rockauto.com/en/catalog/...generator,2412
UPDATE: The pictures on the Summit racing shows 2 pin connectors and the holley website shows a 3-pin (3?)..... so want to verify what that holley alternator part number 197-303 really has.... but then it should be relatively doable
Last edited by carriljc; Nov 30, 2024 at 01:57 AM.
Reason: 4-pin vs 2-pin info...
I looked up that Holley water pump 97-200 on Summit website and it fits the following vehicle. So I looked on rockauto at a 2015 Corvette with a 6.2L/376 and you can get one for under 40 bucks.... interesting.
Make:
CHEVROLET Beginning Year:
2014 Ending Year:
2022 Engine Type:
V8 Engine Family:
Chevy small block Gen V Engine Size:
6.2L/376
The Holley pump (97-200) is smooth on the outside. The GM pump (AC Delco 251-822) has grooves on the outside. Looking at how the belt is routed in the Holley Mid Mount kit, the smooth pulley is correct. So it appears that the Holley water pump is the one to get. Get a gasket, too, GM 251-2065
I ended up getting almost exactly that. Slightly different version but only one digit different in part number, I think maybe a newer version also from a Silverado and same amperage. I’m building my harness with the correct connector so it will be plug and play. Thanks!
scuderia_kannan
If you are writing about the adapter in post #44 I suspect it will NOT work. Pretty sure need a 5 vdc pwm control signal.... BUT make sure and enlighten us if it does!
Originally Posted by scuderia_kannan
I ended up getting almost exactly that. Slightly different version but only one digit different in part number, I think maybe a newer version also from a Silverado and same amperage. I’m building my harness with the correct connector so it will be plug and play. Thanks!
scuderia_kannan
If you are writing about the adapter in post #44 I suspect it will NOT work. Pretty sure need a 5 vdc pwm control signal.... BUT make sure and enlighten us if it does!
Coild you explain that to me in layman’s terms? Why can I not just use an adapter like this one
scuderia_kannan
The regulator is controlled via PWM to alter the generator output. In my bonehead terms it "pulses" the field as required to maintain the desired alternator output voltage. That adapter does not appear to anything like that since there is no indication of any PWM control.
Here is a pretty good summary. Comes right out and tells you that those adapters do NOT work.... however, if you find out differently please let us know since you already have the adapter.
BUT --- it's no big deal. You can either buy the controllers he mentions in the article or fabricate your own for like 20 bucks worth of parts from amazon and/or ebay....see the youtube video below and you can follow where I'm putting a 2 pin alternator into my 68 (doing it at the present time but I'm slow)..... if you follow this link there are a lot folks that know a lot about exciting these alternators: https://www.corvetteforum.com/forums...xperiment.html
Luckily, I was still within the return window for my unused alternator. It seems like the least complicated solution is actually to just buy an alternator with a 4 pin connector and rear-facing post, and just cut it down and use the sideways terminal extender. Problem solved.
scuderia_kannan
That is certainly one of the solutions but methinks you're just creating more work for yourself....
That side post alternator that you had was perfect for the Holley Mid Mount and all you needed was the 20 bucks worth of contraptions to have a functioning alternator.
What ECM are you using?
I reckon it would make sense if you have the ECM that plugs into the 4-pin alternator.
I *think* I found a 4-pin alternator with a side lug from Holley. This is what Holley uses on their "SBC HOLLEY MID MOUNT" contraption ---pretty cool really, similar to the LS Holley Mid Mount but for the classic SBC. This might be worth it to someone using and old SBC that needs all the expensive separate individual pulleys..... could do the same bargain-hunting that folks are doing to use the LS Mid Mount with otherwise sourced separate components.
Luckily, I was still within the return window for my unused alternator. It seems like the least complicated solution is actually to just buy an alternator with a 4 pin connector and rear-facing post, and just cut it down and use the sideways terminal extender. Problem solved.
Last edited by carriljc; Dec 10, 2024 at 09:20 PM.
scuderia_kannan
That is certainly one of the solutions but methinks you're just creating more work for yourself....
That side post alternator that you had was perfect for the Holley Mid Mount and all you needed was the 20 bucks worth of contraptions to have a functioning alternator.
What ECM are you using?
I reckon it would make sense if you have the ECM that plugs into the 4-pin alternator.
I *think* I found a 4-pin alternator with a side lug from Holley. This is what Holley uses on their "SBC HOLLEY MID MOUNT" contraption ---pretty cool really, similar to the LS Holley Mid Mount but for the classic SBC. This might be worth it to someone using and old SBC that needs all the expensive separate individual pulleys..... could do the same bargain-hunting that folks are doing to use the LS Mid Mount with otherwise sourced separate components.
I'm using a stock LS1 ECM from a 2000 Corvette, so I think it should plug right in to the 4 pin alternator, no contraptions necessary. And yes, I saw that Holley unit, but cutting the lug and making it a side post saves me nearly $300!
scuderia_kannan
I concur. Cutting the lug and using the Ford sideways adapter is the smart move.
Originally Posted by scuderia_kannan
I'm using a stock LS1 ECM from a 2000 Corvette, so I think it should plug right in to the 4 pin alternator, no contraptions necessary. And yes, I saw that Holley unit, but cutting the lug and making it a side post saves me nearly $300!
Last edited by carriljc; Dec 23, 2024 at 03:31 AM.
Found a good video of a guy installing a Holley Mid Mount pretty much step-by-step. Lotsa pretty good views. It's on a C10 pickup but the views of the Holley Mid Mount are quite good.
