big block 454 ski nautique

High all! received a call last night from a lady in Ohio that has a 1988 big block 454 Chevy ski nautiqueis it true that they had two versions of the big block in these boats one Higher horsepower than the otherand I also heard that one is right rotation in the other is left rotation posting Big Blocks is that trueplease let me know what you think the value might be in this boat it looks pretty clean has a crack on the top deck in the back corner by the rear seat which I think it's comon on those it's also has a wake tower put on it

I have not heard of any 454 HOs after 1986. There is always a possibility but the chances of an uninformed owner is far greater...

Look in the reference section under Engine Manuals. In the PCM Manual, you will find information on engine tag numbers. Have the owner snap a pic and you'll know what they've got.... but like has been said, odds are it is a RR (330 HP) K or S, (not N) model.

Most likely a RH 330hp (or at least it would have been originally) but anything is possible.

425 HO's featured roller cams, rectangle heads, dual feed 800cfm Holleys (presumably mech secondary?) and were LH only. Details on these engines are scarce, all of what I know was learned second hand from Tom (Gottaski) and Craig Warner (of NECC). I understand they were mostly dealer installs. Only a few have popped up in the last few years, it's anyone's guess as to how many were originally made. Rare birds indeed.

for the boat mentioned before not the Ho powered

Yup that's Buck. I'm pretty sure he said it's about a 54 mph boat.

Gary S wrote: connorssons wrote: .             this boat is like it still should be on the showroom floor, so any idea on price It depends,is it for your museum or are you looking for a boat to actually use? You have a year to get ready to make it to an official Green Lake reunion--------

lol was thinkin on using it.

[QUOTE=Gary S] Yea I'm just kidding you. I for one though would like to see the Seperator show up some time and I know others would too.[/QUO ill get one there soon, promise!

75 Tique wrote: phatsat67 wrote: Yup that's Buck. I'm pretty sure he said it's about a 54 mph boat. Guess it could be given the variables to be considered. "Owner said...." always has to be taken with a grain of salt. I've only run across one BBC SN and it was good for 50.4, I believe it was. (I know because my 50.7 Tique beat it in a challenge at a 2007 gathering.

It is a believable number In my experience

I have found optimally propped with a ski boat prop

45 is about right for 240 hp

47-48 is about right for a 290 ish hp

50ish is about right for 330 hp with a 2001

54ish is about right for 425 hp with a 2001

And shaft and strut...

Agree with joe on the numbers, that's what I've seen as well. At least an early (pre-87) 2001.

TRBenj wrote: And shaft and strut... Agree with joe on the numbers, that's what I've seen as well. At least an early (pre-87) 2001.

Yeah, 1" with ho big block and a 1.23 would probably do the twist.

Well, Joe twists the 1" with the small block given his makes insane power but factor in big block torque multiplied by the 1.23 and there we go.

= smiles