68 one wire alternator
Thread Starter
Burning Brakes
Joined: Jan 2003
Posts: 961
Likes: 275
From: Frederick MD
68 one wire alternator
So ran into an interesting problem here. My brothers 68 has a 100 amp 12 si one wire alternator on it. He needed to replace the valve covers due to them just being all bent up from previous owners over tightening and bending etc. We’ve done our best to straighten the OE covers but they continue to leak so not worth fighting with anymore.
Anyways he’s tried 2x different covers and they don’t clear the alternator. Car has power steering FYI. He is tempted to start bending brackets or putting spacer washers under and I told him to hold up. The belts currently never squeal, it never throws belts, everything lines up perfect let’s not **** up the alignment of stuff here and create another problem.
I know the 12si is not the OE alternator/generator. Car has electric fans and a MSD box so it needs the amperage. The OE ship sailed long long ago on this car. I was looking at CS130 units which are similar except about 3/4” smaller in diameter and that might be enough. Anything else I should consider? Can’t really use much longer of a belt and I’d be worried about getting it tensioned right.
Anyways he’s tried 2x different covers and they don’t clear the alternator. Car has power steering FYI. He is tempted to start bending brackets or putting spacer washers under and I told him to hold up. The belts currently never squeal, it never throws belts, everything lines up perfect let’s not **** up the alignment of stuff here and create another problem.
I know the 12si is not the OE alternator/generator. Car has electric fans and a MSD box so it needs the amperage. The OE ship sailed long long ago on this car. I was looking at CS130 units which are similar except about 3/4” smaller in diameter and that might be enough. Anything else I should consider? Can’t really use much longer of a belt and I’d be worried about getting it tensioned right.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,212
Likes: 9,350
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
I have a y8 with a 100 amp single. There was a boss hitting i had ground off and it worked. Pics would help
If you flip the valve covers upside down and use a block of wood with a clearance groove cut into it as a base you can get those dimples flat.....just dont toss them as most after market tin is thin and he may want to revisit them later....i would look at other Aluminum factory covers as a solution. I liked the 7 fin C2 covers and the LT1 style as well for a factory muscle look. You just need premium gaskets to prevent leaks...and a little RTV on the head surface
If you flip the valve covers upside down and use a block of wood with a clearance groove cut into it as a base you can get those dimples flat.....just dont toss them as most after market tin is thin and he may want to revisit them later....i would look at other Aluminum factory covers as a solution. I liked the 7 fin C2 covers and the LT1 style as well for a factory muscle look. You just need premium gaskets to prevent leaks...and a little RTV on the head surface
