thanks again Bill, I chose whipple because procharger is hard to dial in with the carb application. I was quoted 5500.00 for new B&M blower installed, says will ad 150hp with mild boost (5-6lbs). Waiting for whipple quote, anyone have any comparisons?thanks for all the info... Mark

hirshy, i have a friend with a 280zt with 500hp carbed and knuckles installed pro- charger on it. it runs 87 mph gps with 5 lbs of boost. you are correct about problems dialing in carburated motor. this same boat ran 9 lbs boost at first, went 93mph, but burnt some valves, so they backed the boost down and seems to have solved the problem.also they took out the jets in the secondarys of the carb. i had never heard of takeing them totaly out, but it seems to work in this setup.. good luck and let everyone know what your results are. BILL

Gameover..... I live about 1/2 mile from the DER launch in Benton Harbor. I usally just boat in the big lake but I have a friend that runs an Allison on Paw Paw. I may just get over there yet. My 251 is Red and Black. How bout you?

Which four blade Hydromotive Prop? There are several offered on their website should I call and ask them I have a 2000 stilleto with 7.4L MPI....I plan to add a pro charger or whipple system so would I wait until I do that..I'm running 68 with a Mirage Merc Prop

Got some new guys on here...so i thought i would let you guys know how my Convincor 300 runs....single 502MPI w/ Stage II Pro Charger 6 pounds boost......80 GPS.. Kunkel's set it up also .......It's for sale too, but i think i have it sold.

ko, call tom at hydromotive and give him your hull and motor combo, he will tell you what will work best for you. most of us ck owners use the 4 blade Q-4 here is their number 330-425-4266 good luck post your testing results please bill

Hi everybody,

This is my first time on, so I hope I'm doing it right. I have a 280 Convincor with twin 454 mags. I was running 78 last year. I'm cramming Whipples in. It's a very tight fit with some deck and seat back mods. I plan to try and start it soon, I hope. I was planning to put 28 pitch 4 blades on to start. I'm not sure if I will use Hydromotive or Mercs. I'm boat out of South Haven, MI. I hope to see some of you this year.

welcome to the board and the checkmate family!!!!!!! safe boating!!!!! bill

dlbCheckmate my ship is white with a red stripe ending in a zig-zag. Should try out PawPaw at least once. Busy on the weekends but if you get a weekday there are a few fast v-hulls that test out there equipment before hitting L.Mich.

Seems as if there are quite a few checkmate owner on Lake Michigan, can't wait to meet you guys this summer.

Welcome to the board.
Dave