Mercury 1075 runs flat top pistons in the hole about .075 maybe little more so I don't think detonation is an issue.

I havent seen 50-60 f drop from the intercooler vs non intercooled, in the couple applications ive played with. I would think, the boost level would drop, but power go up.
Those roots blower intercoolers, do seem to be a pretty good restriction.

I made 7lbs boost with blower at 7% under. When i changed the engine combo, lowered static, changed heads, added intercoolers, i had to be at 8% over to see psi. Being that i changed several things, hard to say . Did i lose boost because the heads flow better? Air temp cooler? Restriction of the intercooler core ? I really dont know.

No kidding...!! Everyone seems to have a different opinion on this. Especially in blown builds. It sure would be an easy way to get me to upper 8's or 9-1 since the heads have to come off anyway for valves.

[QUOTE=rob vanharten;4496038]No kidding...!! Everyone seems to have a different opinion on this. Especially in blown builds. It sure would be an easy way to get me to upper 8's or 9

Don't spend the money on the chambers wait till you want to up grade the heads to something better. There is a set of CNC brodix heads on ebay with Inconel valve came off a boat freshwater cooled. Don't know if they are better than what you have. Think 2100 ish per set. OBO They look very good.

Flat top piston will run cooler less surface area.

Those the 345 cc brodix heads. 2.25 int valves?

think so
shows 4 of them in picture they are not bb4 heads

So roughly 8.5:1 or less. .075 below deck is a point itself.

IDK just using it for example. That's why t brought up the 1075 piston in the hole just through some big head gaskets at it and be done.

My pistons are flat tops with a 3cc valve relief. Any idea how thick a head gasket they ran on the 1075? If I could run a thicker gasket that would be so.... nice!! Mine are a compressed .030 stock. Some .060-.080's would make a big difference.

Those are the ones. Been on there a while. Make offer for both. Those would work well for his builds.