PDA

View Full Version : Prop Sizes?


thomas.w.williams
03-23-2007, 08:33 AM
I in the market for a new prop for my 82 S&S. Just wanted to get some feed back from some of the older boats on what prop size and pitch you guys like best? Thanks

Winston

sanjuan23
03-23-2007, 09:41 AM
Call Eric @ OJ or Erk will be along shortly to sell something.

Jesus_Freak
03-23-2007, 09:42 AM
I second the Eric @ OJ: 800-359-9730

EJ OJPROP
03-23-2007, 09:48 AM
What transmission does your boat have, 1:1 or powerslot? Size of your current prop? Let me know and I can suggest a new prop.

Eric

Maristar210
03-23-2007, 09:49 AM
You gotta like that kind of service...

thomas.w.williams
03-23-2007, 05:14 PM
I have an old Velvet Transmission with a ratio of 1.5 2:1 and the prop that I have on there now is a 14 LH 18.. Let me know what you think!

Thanks

Winston

erkoehler
03-23-2007, 05:16 PM
Since Eric@OJ is already on it, I won't jump in........OJ props are what come stock on all new MC's, so he'll be able to set you up. :)

jenglin
03-23-2007, 06:31 PM
I have the same tranny and I just received in the mail an ACME #275 13.5x17.5 (4 Blade) The ppl at ACME very knowledgeable about the 1.52:1 tranny and the 1:1 and the differences b/w the two types of recommended props and they backed up their reasoning behind it. Plus, they are GREAT ppl to work w/ and appear to really enjoy helping people out. They said they get the best performance with the 4 blade 13.5x17.5 on the powerslot tranny. I found the cheapest priced ACME prop at www.boarditup.com I got it for $345.00 vs $400.00+ other places. Good Luck!!!

EJ OJPROP
03-24-2007, 09:55 AM
We offer our #448 - 13.7 X 17 LC 1 1/8" or #454 - 13.7 X 17.5 LC 1 1/8" XMP 4-blades as replacements for our original 14 X 18. Let me know if you have any other questions.

Eric
800-359-9730

BrianM
03-24-2007, 10:14 AM
We offer our #448 - 13.7 X 17 LC 1 1/8" or #454 - 13.7 X 17.5 LC 1 1/8" XMP 4-blades as replacements for our original 14 X 18.

Just to keep this discussion going a little more. Eric, what differences is someone going to see between those two props? Would you reccomend one over the other for slalom or boarding with balast?

PendO
03-24-2007, 11:15 AM
Just to keep this discussion going a little more. Eric, what differences is someone going to see between those two props? Would you reccomend one over the other for slalom or boarding with balast?

this is my understanding - the 17.5 will have more top end, so long as you have the rpms left (available for use) ... the 17 will have more holeshot, but if you have rpms available for use you will just redline before you maximize your rpms at wot ... in theory the 17 pitch is traveling forward thru the water 1/2" less per revolution of the shaft ...

at wide open throttle you should see higher engine rpm's with the 17, but if for example your engine is rated at 5200, and you are only getting 5000, you have no reason to put the 17.5 on b/c it will only decrease your rpms even more ... but if you are seeing 5200 with the 17, you could try the 17.5 and see if you gain any mph, and if you have to give up any rpms - IMO

Ric
03-24-2007, 11:26 AM
this is my understanding - the 17.5 will have more top end, so long as you have the rpms left (available for use) ... the 17 will have more holeshot, but if you have rpms available for use you will just redline before you maximize your rpms at wot ... in theory the 17 pitch is traveling forward thru the water 1/2" less per revolution of the shaft ...

at wide open throttle you should see higher engine rpm's with the 17, but if for example your engine is rated at 5200, and you are only getting 5000, you have no reason to put the 17.5 on b/c it will only decrease your rpms even more ... but if you are seeing 5200 with the 17, you could try the 17.5 and see if you gain any mph, and if you have to give up any rpms - IMO SHOULDN'T YOU BE AT THE AIRLIFT SITE?

PendO
03-24-2007, 11:29 AM
getting the kids ready (which means I am sitting on my arse and my wife is getting the kids ready) ... trying to leave the house by 8:00, (she better hurry up) ... :)

Ric
03-24-2007, 11:43 AM
Good Work

EJ OJPROP
03-25-2007, 09:07 AM
PendO nailed it. I can't explain it any better.