Fresh motor only 10 hours no expense spared Dart block, Crower crank,Carrillo rods, Diamond Pistons ,Isky lifters, AFR Tony Mamo heads, Bob Madera cam Profiler intake, T&D rockers. Bob Madera can verify to all parts in this motor. Motor was dynoed at Wesco Racing Engines by Dave. Motor runs very good it is 850 HP at 6000 RPM $24000 still in boat can hear run text or call for more info 1-616-799-6187 Thank You Dennis

Dennis - This is Steve Whitbeck - Dave put together the same 598 combo that you have. what compression ratio is yours? My cam has a little longer duration than yours.

10.4

I still would like to try your -2 lower unit

What did it make on the Dyno

Bob and I were just comparing this engine to my 604's the other day. Too bad you didn't have a bigger set of headers on the dyno.

That's what I told Bob I'm selling the headers with the motor

Not to piss anyone off but the barometer that day was 30.1 its plugged into the auto correction as 29.29 so it will add HP. I don't know why it is on the dyno sheet that way. Look at the weather history and check yourself.

I don't know anything about that but anyone that knows Dave and his Dyno will trust it more then any other one

It, and most all performance engine dyno's, is correcting to 29.29 and 60* dry air. This is SAE Standard J607.

If it was 30.1 actual at dyno time, then the dyno computer would actually be correcting (power) down for air pressure.The standard is lower at 29.29 But, heat, humidity, etc, could, and did, raise the correction back up.

Lower elevation, more air pressure, more power.
Higher elevation, less air pressure, less power.
Given the same heat, humidity, etc,etc

I've raced and dyno'd in weather many times below the SAE J607 standard numbers. 1200ft below sea level conditions once. Mine shaft air. Many people broke schit. LOL.