I’m leaning towards the N/A route. Mainly because of my drives. To much coin to re rig in one shot. The more research that I do on blowers I’m finding that I really should be looking at the 671’s and not the 250’s or 177’s. Now it’ll be finding the right parts to get an honest 600HP to the prop.

Factory hp500’s are 470hp. This will be a 130hp per side increase and a total of 260hp. To me that’s a huge difference. Should be a 7-12 mph gain. If you read my original post my motors are rebuilt and refreshed with low hours. This is strictly going to be for more reliable HP.

My current setup i’m running an honest 83mph right now @5300rpm’s. If I saw a true 88mph+ aftet builds be happy with that.

This is my exact experience going from 500 to 600 in a 272 Islander. I’m still breaking things in and haven’t played with props yet though. It would occasionally struggle up to 63 in perfect conditions and will now hit that much easier and quicker but will be surprised if I see 65mph. I consider this the limits of the boat itself though.

And here we’re talking about 100 per side for a 200hp increase. That should be noticeable and 600hp NA is pretty reliably obtainable.

A “reliable” build here may be taking the drives into strong consideration.

No problem getting 700+hp out of a mildly built 540-572 with the correct parts. I have a 713 hp fastech 271 with a slightly built xr that I have been running for years with no problems. Just be easy getting on plane and don’t launch it and they will last a long time. Stay away from the superchargers, you don’t need it. Jeff Wurl

Thank jwurl. I’ve been told stick bravos are good to 600hp. Like you said roll on the throttle and throttle off if you happen to exit the water. I’m running labbed 4 blades now. Not as much of a bite as 5 blades. Now to find the right builder on the east coast.