I have only had the boat since last year, but the package has been on it for around 10 years. However, there were several years that the boat had little to no usage. So it's hard to tell, but my take on things is that if you aren't running a lot boost, it's not beating things up really. Also, it isn't so much the top end HP and speed that things add, it's the incredible torque that the roots blowers give you. Not that I am out hammering on this thing because I don't want to break things, but the throttles are VERY responsive to say the least.

If you are interested in adding a supercharger, I'd highly recommend contacting Nickerson Performance and talking to them about it (do a web search for the site). They supplied the parts, and reworked the carbs when the orginial owner had the work done. I sent him the carbs last year for a refresh, and the boat runs great. No soot, idles fine, starts fast, runs fast . He has literally done this thousands of times, and can tell you what you would need and what to expect for performance.

Thanks JB ...might give em a call .. my 311 has fresh 454 mags ..( jasper reman. motors ....I would think it would be better to add something like this now instead of to tired motors ....Mike

Your right, I was going to sell it but it just not moving, so I think I am going to keep it. My thought was if I am going to keep it I would upgrade to whipples. Possibly have Teague Custom Marine pull the motors and do the install. TCM and Dustin have a close relationship and should do a good job. I already have TCM platinum XZ drives. I am going to email Bob at TCM to find out if they will hold up.

Of course I am a boat owner and could change my mind at a moments notice

Sorry for my slow reply. I haven't been on OSO for a while. The flame arrestors on mine would hit the mirrors on the underside of the hatch. That's why the mirrors are removed. If you look at the back of the hatch you'll see that it is modified to move the hatch up to clear the increased height from the blowers.

Yes, they are B&M 174s sitting on 454 Mags. Only about 5-6 #s boost. They work quite well. My 357 with this set up can run 45-50 mph without any boost and with good mileage. 90% of the time I just watch the boost gauges and keep them at 0 to cruise around. But, then if you want to hit it the boost instantly goes to 5 and moves out.