![]() 07/24/2018 at 16:40 • Filed to: None | ![]() | ![]() |
Work is finally being done.
So the news is: looks like my pistons are bad. Cam and rods look OK, pistons look bad. What I was told was that, one of the pistons looked like it had been replaced, the others were in bad shape. I will take a look tomorrow when I bring the parts, they are cleaning the engine today.
So here’s the kicker: I may need to get pistons, possibly with my block bored out. I still think this should be within my budget, as it has expanded somewhat considering I have been saving money much faster than I had expected to. This brings into question aftermarket pistons to boost my compression. That only leaves one option for the 403: Keith Black pistons.
https://www.summitracing.com/parts/uem-kb405-024/overview/make/oldsmobile
These are hypereutectic pistons, and according to their website, I am left with two options, an 83 and a 96cc piston for 9.5:1 and 8.5:1 CR respectively. This is compared to a stock 7.9:1. Price comparison (not including rings) is about 350$ for stock cast pistons(Sealed Power) , 450$ for the performance KB. KB also looks to make some of their own “silv-o-lite” cast pistons that I guess are aluminum? 400$
https://www.summitracing.com/parts/uem-1635-020/overview/make/oldsmobile
Still going to be running the stock smog heads, but adding a mild cam. I really wonder if I am going to be putting lipstick on a pig here. May still make that pig shine.
![]() 07/24/2018 at 17:13 |
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For a hundred bucks I'd upgrade.
![]() 07/24/2018 at 17:35 |
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As long as you don’t mind running premium, sounds like a good opportunity to go up to the 9.5:1 CR; with a mild cam you may find it makes decent power, even with the smog heads.
![]() 07/24/2018 at 17:37 |
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Premium in a 403? oof. maybe not then.
![]() 07/25/2018 at 07:30 |
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just fit a 454 and be done with it
:)
![]() 07/25/2018 at 13:21 |
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mo’ money.
If the car itself was in better shape I would do this but it ain’t. This may be the cheapest option right now.