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View Full Version : 1:1 vs 1.5:1 Trans in '90 Prostar??


LKGman
08-07-2012, 05:44 PM
OK everyone, what's the pro's and con's of each? Is one just as good as the other?

JohnE
08-07-2012, 06:59 PM
OK everyone, what's the pro's and con's of each? Is one just as good as the other?

Powerslot is better every time.. Unless 2 mph or so top end is important

ski_king
08-07-2012, 07:01 PM
Powerslot is better every time.. Unless 2 mph or so top end is important

What he said X2!

kyfooter
08-07-2012, 07:43 PM
Agreed. Powerslot also creates a little more hard prop wash in the table which you'll notice if you barefoot. It can be unfriendly on wake crosses! Jumps right up and grabs your toes!

Redstorm
08-08-2012, 01:59 AM
Hope I don't sound totally nieve. But can someone explain "powerslot" . I have seen talk bout powerslot prop and or Trany. Thanks!

Oneday
08-08-2012, 02:14 AM
Witch one is a powerslot. 1.5-1, or 1-1?

tph
08-08-2012, 02:31 AM
Witch one is a powerslot. 1.5-1, or 1-1?

1.5:1 and larger prop (14 x 18 I think as opposed to a 13 x 13 on the 1:1)

RadarDad
08-08-2012, 08:38 AM
OK everyone, what's the pro's and con's of each? Is one just as good as the other?

Everytime I have skied on a power slot the rooster tail is taller. The larger prop is the cause. I had a 1988 1:1 and my rooster tail was much smaller. For some reason I took my hardest falls on a power slot?

Roger

mzimme
08-08-2012, 08:39 AM
Hope I don't sound totally nieve. But can someone explain "powerslot" . I have seen talk bout powerslot prop and or Trany. Thanks!

Powerslot tranny is a reduced gear ratio transmission. It results in quicker hole shot/accelleration to slalom speeds. It will pull skiers out of the water much easier. The larger prop also plays a part in this.

byronic
08-08-2012, 08:59 AM
"Powerslot" is the name the makreting dept. came up with to describe a group of factory options. This includes the 1.5 to 1 underdrive transmission,the engine makes 1 1/2 revolutions for each rev. at the prop, verses the 1 to1 or direct drive where the engine and prop make the same revs. Also included is a larger but slower turning prop and a larger diameter prop shaft,maybe 1 1/4" or 1 1/8" verses the 1" shaft on the direct drive. I believe the idea is the larger slower turning prop will hold a more constant speed under the hard pull of the skiier when cutting,with less throttle adjustment from the driver. As someone else mentioned also a little loss in top end with the 1.5 to 1 but a little more hole shot,not something any MC needs. The Powerslots were also marketed as being quieter with less prop noise, but with that big engine sitting in your lap I don't know if you could tell a diff. I have an 86 1:1 and can't imagine having anything else,just a little more work for the Sig O on the throttle to keep me @ 34mph. I'm 63 so I've slowed down 2 mph.

Redstorm
08-09-2012, 02:23 AM
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