FOr my particular build, I want to lower my compression down to around 9:1 with the stock pistons and sleeves. A thicker head gasket won't do the trick, but if I machine around 0.040" off the top of the pistons, that should do it.
I know that they are pretty thin already on top, but the ring lands seem to be the real weak link with the stock pistons, so I'm thinking this might work out ok.
Does anone have any actual experience with trying this, or know of anyone who has?
A better question would be why would you use machined STOCK pistons on an engine build? It would be idiotic not to go forged. I cant stress this enough, if you are going to do a complete tear down spend the money to do it correctly.
I cant even immagine the cost of milling that much material off a piston, grinding, polishing and buffing.
Plus, everyone who goes boost eventually wants more so you would be shooting yourself in the foot from the get go.
I know that they are pretty thin already on top, but the ring lands seem to be the real weak link with the stock pistons, so I'm thinking this might work out ok.
Um...sounds like you just answered your own question. I'm with keah on this one. If you don't use a piston that was made for boost then you are going to accelerate the failure of the stock parts. Check out the "my engine went toast on FI and why" thread. There are countless people on here (me being one) where their ringlands failed while pushing low boost, let alone anything over 9psi.
Not the best idea, I know, but I never heard of anyone trying it so I thought I would put the idea out there. The cost of machining the pistons wouldn't be an issue since I could do it myself quite easily.
The reason for wanting to stick with the stock pistons is that I haven't been able to find anyone that sells forged pistons that are compatible with the stock FRP cylinders (they all require sleeves). Does anyone know if it is possible to buy FRP compatible forged pistons??? The cost of pulling my whole engine out, and shipping it across the border, and having it sleeved, etc, etc is at the root of me wanting to stick with the stock cylinders and pistons. ....May just be an issue of wanting more than I'm willing to pay for :-)
Also, does anyone know how much horsepower the 5th generation automatic transmission can handle? This is my daily driver and a manual transmission in stop and go rush hour traffick for a couple of hours a day is not fun, so I won't be switching over to the manual.
Although I have no FI experience, I know that the cost of pulling your engine and having it shipped across the border would be less than pulling the engine because it blew up and you had to get a new one. Plus that would be a much bigger PITA.
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Originally Posted by 98auto
Putting an oil cooler on a 5th gen SS is like rearranging the deck chairs on the Titanic.
Darton lipped sleeves - $220 shipped. I used them and they work perfectly. No need to do a full Closed deck conversion or insance AEBS. No point unless you are pushing really big numbers.
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