Looking to get a 1971 Glastron V-175 super jet back on the water. This is a deep v boat used for recreation tubing,skiing etc. Currently has a Berkeley with a C impeller and a 350 Chevy. When the boat was originally done over I had no idea of how or why a jet boat works. Living in the northeast very few people did either. I had a 4 bolt main motor rebuilt. It supposedly had a higher lift cam, edelbrock performer ,and 650 holley carb. It pushed a brand new rebuilt pump with a C impeller to 4800 rpm's Good for a whopping 250 hp. This was done by a local shop that didn't specialize in marine or performance engines. The motor ran flawless for 6-7 years and finally I believe it developed a knock from a wrist pin bearing due to a small amount of water getting in. The crank bearings all looked fine. I believe the boat originally had a A impeller in it. The motor and pump were changed at the same time. The boat use to pull skiers out of the water much better even with a tired junk yard motor before the rebuild. It also was as slow or slower with the new engine and pump 45ish on the speedo. Since the motor needs to be rebuilt I am looking for more power and speed. I have read as many of the back pages on as many sites as I could find. The cost to keep the c impeller and add a inducer( I can have the shaft machined for free at work) Is about equal to getting a bigger impeller. I would like to go up to 350 hp with the 350 or go to a 383 with 400 hp. That would put me around 5350-5600 rpms on the C impeller which should get some more speed. How much does the inducer help on low end for wakeboarding,tubing,skiing etc. The current set up fell of plane easily with a load. So what would the pros and cons of a C with an inducer VS a bigger impeller be? What would anyones educated guess be on a speed increase from the 4800 rpms to the 5600 ones with the additional 150hp be. Would this also help on the low end due to more hp there also or will the C impeller only do so much at the hulls planing speed. Thank you for helping with yet another impeller question. I know its alittle bit different than the I can only get 90 mph out of my 1000 hp 600 lb boat ones. Also does anybody know of anyone in The Northeast ( Mass,Nh, Me, Conn,) area that may be of any help. The guy I used 15 years ago Kurt from Nh is no longer in business as far as I know.