28 Speed and HP Ratings
 

Maybe Jo or someone can summarize all the data that is in other threads. What are the speeds of a 28 single, pleasure version with the following Engines/HP ratings:

500HP

600HP

650HP

700HP

750HP

I am tweaking my existing engine to get just over 650HP, but plan to build another for next season.

Thanks,

Kirk

Re: 28 Speed and HP Ratings
 

Hey kirk great thread to start.

I can tell you that my 540ci is approx. 600+ hp and does 72-74ish with1/3 gas and 2 adult passengers and b1- 26 factory prop.

I wonder if I can get Albert to trade with me :D

Re: 28 Speed and HP Ratings
 

LOL, it takes alot of ponies to push the 28, my boat is not to be compared to a pleasure version because it weighs about 1k lbs. less. Jo made this boat very light and at the same time very strong. You need a true 670 hp motor to get you over 80.

Re: 28 Speed and HP Ratings
 

this would be my guess

500- 70 - 72
525- 72 - 74
600- 75 - 77
650- 77 - 79
700- 79 - 84
750- 84 - 88

900- 100 +++++ :eek: kids, do not try this at home ..they are trained proffessionals

Re: 28 Speed and HP Ratings
 

I don't plan on trying that at home but hopefully soon at the lake...

Re: 28 Speed and HP Ratings
 

My single 525EFI with a labbed 26 B1, 2 people and 1/2 tank runs around 69 GPS.

Re: 28 Speed and HP Ratings
 

Im thinkin something is wrong. 500 efi were running faster.
I think You should be running somewhere around 73 mph +-

Re: 28 Speed and HP Ratings
 

Bruce:

I'm wondering if I should try a 26 cut to a 25? My present RPM's are around 5100. Some guys suggest I try a 5-blade. The acceleration with the 25labbed is great and the mid-range is strong. It's at the top end I feel like the boat has more, but I don't get it. Any thoughts?

Ron

Re: 28 Speed and HP Ratings
 

Try a 24 or 25 Hydromotive QIV and possibly a 2 inch shorty lower on your drive. you should be running at 5400 rpms. The guys that ran 500 carb and efi were running 26 B1 with no prob and running 70 - 72

Re: 28 Speed and HP Ratings
 

Thanks Bruce..I'll look into that.


Ron