Setback/ setup

Lars T · 24-10-2005, 01:03 PM

Hi chaps..

The P21 is almost stwed away for the winter and i'm, probably like many of you, thinking of upgrades etc..

I have concluded that i need at jackplate (hydraulic one), but am not sure of the setback..?!
When runing my current setup (6 setback, no jack, 27" tempest) i do need a lot of trim to reach top end.

Is anybody running a P21 with more than 6 inches of setback?
What will say 10" of setback do to my P21??

Can the transom support my 3.0 V6 at +10" of setback?

Can a Phantom be comparede to a US Checkmate?? Not a light-light weight hull, but in the 1200lbs region? The Checkmates "overthere" are running with 10-18 inches of setback!?! Or is it because of the "pad on the bottom" they can run with the longer setbaack??

Can't wait to hear your comments

BluFin · 24-10-2005, 02:09 PM

If it was me I'd keep it to the minimium, 4 1/2" if possible 6" max.
At the end of the day the boat handles best with the motor on the transom (thats where I'd leave it), it will go quicker with setback at the expense of the handling. Its a very much suck it and see & you can waste hours & a small fortune doing it. Burty & Taz will give you a good summary from what they are running. If the last few MPH are really needed fine but with a 3.0L (what is it 225/225/250XS) I think I'd be looking at keeping the power on & usable rather than those last few MPH (Sorry mate KPH, metic system). This will give you a greater advartage than a bit of speed when it's flat calm.
Oh got my sensible head on for 10 mins !!!!!

Lars T · 24-10-2005, 04:47 PM

Hi BluFin,
Thanks for your input..
What do you mean by "at the expense of handling"??

I'm only using the boat for fun,skiing, tubing etc. so cornering at 60-70 mph is not that important

BTW, it's a 250XS..

Taz · 24-10-2005, 07:15 PM

Sounds like you need to mount engine higher, I wouldnt bother with a jackplate! Spend some money on some bling trim tabs!

Burty · 24-10-2005, 07:44 PM

Quote:

Originally posted by Taz
Sounds like you need to mount engine higher, I wouldnt bother with a jackplate! Spend some money on some bling trim tabs!

Why??? Tabs will slow you down as you will have more boat in the water and more boat equals more friction and more friction equals less speed.

jack plates are good because it gives you both a good pull out (engine low) and good top speed (engine high) but at the expense of handleing. the further you move your engine away from where it's designed to be the worse the handleing gets.

I run with 8" setback on my p20 which affects the handleing but i've since got used to it and think it handles ok however you put a race driver in the same boat with and without setback and he will ultimately be able to corner faster in the one without the setback.

dont know what its like in a 21 though

Jon Fuller · 24-10-2005, 08:56 PM

Whilst i'm sure the cornering is affected by set back, that isn't the only thing it upsets, I'd personally be more worried about it affecting the pitch & directional stability in a chop at speed.

Pauls 21 leaps onto the plane, handles lovely, and runs over 70 with 225 hp bolted straight on the transom, can't see the point in messin with that.

BluFin · 25-10-2005, 08:11 AM

250XS you wont have a problem pulling out I Fink!!!
bolt it to the transom, for what you are using it for it will be fine,what g'box type is it ,
It's a tad heavier than your old motor see how it runs you may want to move some weight about to counteract any effect. You will be able to throw a bigger prop also again a possiblw weight re-distribution

Lars T · 25-10-2005, 10:37 AM

I'm runing with the Torque master w low water pick in the cone..

In Tact then it's a biut lighter then my old Opti, becuase the Opti was with an XL-leg, thus weighing in a ca. 240kg.. with a 20" leg 225 kg.

sinkunit0 · 25-10-2005, 06:21 PM

would you not be better with a sportsmaster gearcase the torque master is for heavier boats or have i been misinformed again. what does your phantom weigh 500kg??

Taz · 25-10-2005, 08:29 PM

Quote:

Originally posted by Burty
Why??? Tabs will slow you down as you will have more boat in the water and more boat equals more friction and more friction equals less speed.

jack plates are good because it gives you both a good pull out (engine low) and good top speed (engine high) but at the expense of handleing. the further you move your engine away from where it's designed to be the worse the handleing gets.

I run with 8" setback on my p20 which affects the handleing but i've since got used to it and think it handles ok however you put a race driver in the same boat with and without setback and he will ultimately be able to corner faster in the one without the setback.

dont know what its like in a 21 though

My personal opinon on jackplates now is a no goer, im with jon on this one, But go try it u may like,

Jon Fuller · 25-10-2005, 08:45 PM

Quote:

Originally posted by Burty
Why??? Tabs will slow you down as you will have more boat in the water and more boat equals more friction and more friction equals less speed.

True, but only when they're down.

When they're tucked up out of the way, they no detriment at all.

BluFin · 26-10-2005, 08:49 AM

I M H O for the intended use the TorqueMaster is perfect

Lars T · 26-10-2005, 08:55 AM

Quote:

Originally posted by sinkunit0
would you not be better with a sportsmaster gearcase the torque master is for heavier boats or have i been misinformed again. what does your phantom weigh 500kg??

I think it weighs in the 825kg region fully rigged..
Boat ca. 400 kg
engine 225 kg
misc. 200 kg

I have been informed that the Sportsmaster case "only" will out perfrom the Torquemaster in speeds over 80-85 mph.. don't think i will se much over that..