Didn't for me, but then I'm twice as old as you..:drink:

Back to your original question............ there is nothing required to speak of to take out your 500s and drop in 575sci motors, check hatch clearance to see if they will fit. They are the same base platform (except 500s have roller cam already) same exhaust, etc...

That being said, I also have 575s warmed up to 700+Hp and they are going to be awesome. But to get them that way you are looking at 10K+ per motor to have someone do it for you, or 6K per motor doing it yourself (depending on how much machine work needed). You might as well spring for the whipples and be more MUCH more reliable with the same hp at the same price.

just my .02

hmmm

Well. Lets break it down then.

Your boat will always be worth more, a lot more, with blue merc engines in it. So dropping the stock power for carbed 540s will cost you down the road.

EFi with knock sensors, timing control is safer than the carbed 540s

No one said you have to buy the whippples new, search the market and find some take offs. They pop up at least 4 times a year on here.

Buying used 575sci can get expensive as well. Me personally I would not buy a used engine without having my guy tear them down before install. He seems to anlways find something not right.

The whipples will be money in the bank. Your boat will have stock blue mercs for resale, you can pull of the whipples and sell separately and recover most of the money spent on them.

Dustin at whipple has an extensive database of ECU tunes to make sure your whippled engine is running right, very valuable stuff without paying for a custom tune.

I purchased a single engine AO in February and dropped it off at Young Performance Marine. I would highly recommend you do the same if you want to get to 100mph economically with a nice package. He's good, honest and cares about what he's doing. When your boating season is over tow your boat to Young Performance Marine and tell him what you want to do and how much you're willing to spend to get there!

The 500s might be worth as much as used big blower motors. Just sell them.

Or go with centrifugal superchargers.

https://www.youtube.com/watch?v=_X7ldgGrZGA

I had a pair of n/a 540's 650ish HP -in my 31 Awesome.. put me in the 100MPH club real easy

sounded bad A$$

https://www.youtube.com/watch?v=_1IWae05ops

https://www.youtube.com/watch?v=SgPRiBGTZ1o

or just get whipples & be done with it! :picard1:

https://www.youtube.com/watch?v=e--DOPkoH2c

there's one in the classifieds 6K came off a 500 EFI looks clean 20 hrs

http://www.offshoreonly.com/classifi...o58711-en.html

How fast is the fountain going compared to me new boat, Phil's old boat

that's bad azz :ernaehrung004: