Hello all, I've heard a lot of talk about the faults of our stock piston ring lands and the general weakeness of our stock cast pieces and as such the leaning towards forged pieces in high horsepower rebuilds. My goals aren't for a primarily track/strip build. I'm looking for 350-375 rwhp MAX in a daily driver, operating primarily in the middle of the rpm range. Minimal blowby/piston slap are requirements. In short I want tight cylinder wall clearances in an engine that won't be operating in a constant state of high heat, something that (insofar as I know) I can't attain with forged pistons and their thermal expansion. Does anyone know of a decent aftermarket cast piston with stronger ring lands? Would I be better off risking the stock pistons and having them ceramic coated? Is my concern over forged pistons unwarranted?
Thanks for the help.
Aftermarket -Cast- Pistons
Honestly if your looking into that high of horsepower and only used in the mid rpm range then you dont need that much horespower.
You can put hypereutectic pistons in your engine but youll probbably have to get those custom made. Hypereutectics are pistons that have little to no slap and 0 to .1 cfm of blow by with very good clearance and sit in the cylinder walls perfectly. But racing syndicates also state that using a hypereutectic in a turbo or supercharger setup is not recommended. But I dont see whats wrong with that setup unless your horespower is going to be phenominal or the RPM is going to be high continously.
So I would look into hypereutectic pistons with ceramic coatings. But i woudlnt reccomend them.
From my understanding they are more brittle than cast pistons. Alot of people jsut dont reccomend them for turbo setups for some reason but im sure its from experience.
Maybe youll ba able to get some blocks ot titanium and then size them good like cast pistons and put ceramic coating on the top of themthat way they have little clearance haha. Good luck finding that for cheap though.
You can put hypereutectic pistons in your engine but youll probbably have to get those custom made. Hypereutectics are pistons that have little to no slap and 0 to .1 cfm of blow by with very good clearance and sit in the cylinder walls perfectly. But racing syndicates also state that using a hypereutectic in a turbo or supercharger setup is not recommended. But I dont see whats wrong with that setup unless your horespower is going to be phenominal or the RPM is going to be high continously.
So I would look into hypereutectic pistons with ceramic coatings. But i woudlnt reccomend them.
From my understanding they are more brittle than cast pistons. Alot of people jsut dont reccomend them for turbo setups for some reason but im sure its from experience.
Maybe youll ba able to get some blocks ot titanium and then size them good like cast pistons and put ceramic coating on the top of themthat way they have little clearance haha. Good luck finding that for cheap though.
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Run a compression test on your current motor. If its good, then boost away on your stock pistons and rods. There is a big misconception that the piston ring lands will just crack and die if you add boost. Any piston will crack and die if you suffer from detonation. Granted, the forged pistons will take a tad more abuse. But in general, if you look at the guys who have gone with forged internals, they already have a fuel system to support their levels of boost.
Dennis, a NICO member, has been putting 350 WHP down for a long time now and he runs a stock block. Kill detonation and you can easily make good HP numbers. As far as where the power is generated, that will have to do with cam profile and turbo selection.
WD
Dennis, a NICO member, has been putting 350 WHP down for a long time now and he runs a stock block. Kill detonation and you can easily make good HP numbers. As far as where the power is generated, that will have to do with cam profile and turbo selection.
WD
IF you are going to get pistons, just go ahead and get forged ones. This whole cold clearance forged thing isn't quite the problem people make it out to be. ADAMHU has stated before that while his pistons could actually be rocked slightly in their bores by hand, he hasn't ever noticed piston slap when they are cold. When I was talking to the guys at my machine shop about my forged pistons they too thought that piston slap when cold would be a non issue considering the smaller piston size over most of the V8's that they do. You can run .004-.006 wall clearances on the Ross forgies, that shouldn't be enough to cause any problems. I think it also has something to do with their design as I've not heard complaints about piston slap with Ross pistons, but have with JE's. Thats a really general statement, but its possible that Ross KA pistons have a longer skirt than others etc.