[quote=lewtot184]a 2315 piston and 440 source head are the easiest way to do this. custom pistons/pins with a quench dome may be $1000. I know arias has made this type of piston for 440's so they should know what to do. considering the cost of head refurbishing and new custom pistons i think the 2315 pistons and source heads are an easier alternative and might be cheaper; plus this has a good quench distance. if I was building a 383 this is the combo i'd look at first.
I don't think he's saying quench dome. Just running the flat top piston out of the hole. A quench dome on a 383 probably wouldn't have much of a compression ratio.
I understood that, which I wouldn't do, just wanted to offer a simpler solution from past experience. if a custom quench dome piston was ordered then you can make it whatever you want. I think just using a quench head makes things easier. KB400 pistons are an option for higher compression and can still achieve a reasonable quench distance with an alum quench head. several ways to skin the cat. I did a 383 with 2315 piston and '906 heads a couple summers ago. I was surprised at how well it worked no quench and pump gas. I think the real fly in the ointment could be piston to valve clearance. everybody has to have a big hydraulic cam anymore; turd in the punch bowl.
It just doesn't make sense to me Lew for a 383. Us the KB400 and its a 8.8:1. Why bother? When you do the math to get a quench dome for 906 head with some valve notches, it starts to look a lot like a flat top piston
(If you use aftermarket heads, again with a flat top with 0.040 quench 75 cc chamber 3cc valve pocket you get 10:1 CR.)
That's what I would shoot for what BSB67 said. Do the math and build a flattop piston quench eng if you can make it work with a closed chamber aluminum head. You may spend a bit more but it will be worth it.
That said some years back I built a mild 383 using stock pistons and bore. I honed the cylinders and then knurled the piston and file fit them since the eng had many miles on it and was still stock bore. Then I used 452 heads that I milled to get a true 9.5 comp and I bowl blended them. I used the old MP .484 cam on a 104 centerline and the RPM intake with a 750 DP. In a Dart street car weighing just over 3600 lbs with me in it the car ran as good as 12.31 @ 110 with 3.91 gears on McCreary G/60-15 tires. And it had no ping on 92 pump with 37 total timing. Ron