Update with labbed prop, ran 87.6 gps, with gf, me, 3/8 fuel. I didn't realize it but for my setup every 120lb added to boat I will lose 1mph, so keep this in mind when testing props.

88 281 checkmate with 565. So far 79.6 on gps with bravo drive and labbed 28p!

2001 280zt. Single step. 502 415hp. 23p 3 blade. 64 gps.

26BB 85mph

96 253 procharged 454MPI with cam/heads/CMI and stock Bravo drive with nosecone and 30" stock bravo one prop. 5400rpm 86gps

Nice man that's fast in a 253. How much HP 700ish?

82predictor. Yes original dyno was 704hp at 5250rpm. I was only able to run it for about 2 hrs before the plugged oil line in the procharger burned the compressor up......I had a 26p Bravo then and could only get 76gps (and I was happy with that) I sent the compressor back to ATI and bolted it back on after a complete rebuild.....and wow did the engine wake up! I had no trouble over-revving the 26p so I bought a 30p and spun that beyond where the HP was made on the original dyno so I then bought a 32P(my only brand new prop I every purchased and its more like a 28P...I have to send it back). Obviously the original compressor was on its way out and I really don't know where it makes the most HP or how much it makes now. I got a short video on YouTube (below)....its got CMI TubeTops with 4.5" dry pipes so its pretty loud in the narrow river-LOL
https://www.youtube.com/watch?v=OIci06FPwp4

Nice video! Really carrying the bow!

looks and sounds great!

2000 ZT280 with 548ci natural aspirated motor runs 79mph @5300 CMI dry pipes