248sf-so anyone know where I can get these?

Good news, I came across the part number doing research into building a more powerful duke thats not a super duty. I did find everything I was looking for at autozone. 9.0:1 CR standard size piston H547CP. Anyone looking to build a duke these pistons are what you want.

Isn't that lower than the stock duke CR?

That's the stock replacement part.
There is nothing desirable about that part for performance use. No increase in compression, not forged, not lighter weight, no gains.

I was under the impression duke stock ratio was 8.5:1 I guess you can't believe everything you read

quote Originally posted by Fadingaway: I was under the impression duke stock ratio was 8.5:1 I guess you can't believe everything you read

It's a vague memory but I think maybe the earliest generation dukes were 8.5:1. The version used in Fieros is 9.0:1 though.

If you were looking for flat pistons to up the CR here is a link: http://www.summitracing.com...le-2242034/overview/

the duke is not a particularly good engine to soup up. the lower end has limitations in strength and the cylinder walls are not all that strong.

it has been tried numerous times, but for the cost of materials and time, it certainly will not satisfy in the long run

You will likely spend less and get more power out of an Ecotec swap.

Arn

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Well kinda weird to bring up this old thread, I ended up putting a 3800 supercharged in my car.

Oh good for you, saw the link from Google while searching for flat pistons just thought I would share