Pachanga 22 real gps top speeds

[Pat Ousborne]

20 years ago and before gps speedos, I had a 22' with stock300 prop hp/454 and 1.32/1 alpha drive spinning a 21'cleaver. Speedo said 65-67 @4600-4700rpms.Then I repowered to a high performance 454 to turn a 21cleaver 5000-5100. Speedo said 70mph. I wonder how fast was I really going in both cases. Seemed like we were really going fast but probably doing a little less than the old pitot tube speedo was saying? Anyone know what the gps would say today or know the prop slip % to calculate?

[Biggus]

I just sold my 87 22 Pachanga last fall. Mine was just like you described, 330 ho 454, 1.32 Alpha, with a 21 p Mirage. Speedo was mid 60's. Gps with one person, 1/4 tank. 60.8

Cool boats. I actually owned two of them. Still have a small block (350 mag 270 hp) powered one that runs a bit faster (62.9) than the 454. I think the additional weight of the big block overcame the extra 60 hp.

Kurt

[Pat Ousborne]

Thanks for the speeds but seems to me the extra 60 more hp should more than make up for the extra 300lbs onboard if your 454 was running 100%. 3 mph slower with the 330/300 prop hp vs the 270/240 prop hp?