I have used the Callies/Lunti/JE combo in more than one high boost motor with good results. A couple of hundred dollars more than Eagle. Worth it? I dunno but I like to stick with what I know works. I have no spare motors sitting around! You need pistons specified for nitrous to run a 300hp shot reliably and you should avoid light weight wrist pins. If you get the right pistons they should come with the right pins.

CR will depend on the cam. A big cam will need/tolerate a higher CR and vice versa. You need to pick the CR according to the cam and fuel available.

Rich

 

The stock O2 narrow-band sensors are rated 50 hours on leaded fuel. I still have mine, using them as plugs for the holes in the headers, and connected to the stock PCM (which is only used for speedo, IAC and emissions) and one of them is still working after 4 years and many gallons of C16 (6 grams/gallon TEL). I wouldn't even attempt to run leaded fuel through a catalytic converter. I drop the converters out when I run leaded fuel.

A buddy of mine got about 1/2 season of light racing and a lot of dyno time out of his wide band sensors before he had to replace them.

 

I'd still do the Eagle Crank - very easy choice!
I'd still do the Eagle rods - very easy choice and in 5.850 long!
I'd then do custom Wiseco NOS pistons like we do, setup RIGHT, with the money you saved with the Eagle stuff over the more pricey stuff and with some nice NOS .200 wall pins too and you would be SET.

 

Eagle would work fine at that level I would think. I would personally go with Scat componants and JE customs, but thats my own preference. Your gonna need a premium ring pack too. Hellfire for sure as you'll be generating a TON O heat up top. Just call the piston manufacturer and let them know what you have in store for their product. They will probably recommend a piston design stronger than you actually would need, but it makes for good insurance. When you screw this thing together, be damn sure you put enough gap in the rings too. All too easy to butt the ends on a big shot, and there goes your fun. Maybe .025 to .032 on top with .018 to .022 on second. It's gonna open up a couple thou when the rings seat (mostly from the walls, not the rings). Going 4-bolt steel caps on the mains goes without saying, and I would run a little on the loose side and run a thicker oil (20w50 or so) to give the bearings a little more cusion. As for bearings on this build, I would choose King alecular, but Clevite 77H's are a fine choice too.

You "might" wanna give a little thought to coatings too while you building up. Maybe a nice coating on the piston tops (chamber too if your feeling froggy).

Do all that, and then spray the bejesus out of it (on good gas of course) and start breaking other stuff in short order. Oh, and your gonna need some spare shorts too..

Dave C.