Hello, I am coming to Phoenix on business in about 2 weeks, quick couple of questions as I am new to any kind of upgrades to engines, I have a regular 454 in my boat with full MSD upgrade to my engine including a new Quickfuel M800 CFM carb, is there a lot more parts I would need for this kind of upgrade? sorry to sound like a novice but I don't want to buy this thing then realize I need about another $3k in parts, I am for going to have to pay somebody to install it which is totally fine, thanks in advance.
Also how much additional power do you get from this rig being added to a regular 454?
Buy a matching carb to your Quick fuel. Under drive it. Add much HP/TQ.
Buy it. Its a good deal. Get another carb. Block power valves. Jump up in jet sizes (maybe 6 just a guess). Add a boost gauge on your dash. Read a pulley chart to figure your 454ci boost with I'm guessing a stock 8/1 flat top piston. Use a large bore 6-71 to guess the 420ci megablower boost. Back off timing to 32 degrees.
A good set of valve springs might be a good idea.
You will be amazed on the low end torque gain. Your big boat will plane out with minimal throttle...compared to using everything you got now.
Go easy on your drive. Don't drop the hammer. Roll into the gas and let the boat catch up to the torque of your motor. Parts do break. ( I've had to back home a few times after a Bravo let go with an M3 Procharged 468)
Don't be afraid of it. You will only spend maybe a $1000 for a good matched carb and a few hours to bolt it on and get the thing running with gaskets and jets. I would recommend that you work with whom ever you choose to do the work. Learning, and watching...and understanding the mechanicals of your boat will make you enjoy it all the more.
Once you have a supercharger, you will never go back to a naturally aspirated engine.
I'm sure many guys will chime in with some great recommendations. Give it a shot.
Get a couple pullies. Shoot for 5psi for starters and increase it up to 7psi if you think you need more power. Even if your gauge doesn't read boost at part throttle...that blower is packing air into the cylinders and you will be amazed in the power difference. It is a night and day change.
Handfull and Dragon, thanks very much for your help, lots of technical jargon I will need to discuss with the tech who works on my boat, but already reached out to the seller and I hope to be in good shape in the next couple of weeks, possibilities for giving the boat some more go is good stuff.