Expected speed 21 XDC

[kimclark]

What would be a average speed for a 2003 21XDC with a 2014 250 pro XS , 1.75 SM , 29 pro max, 1-1/4" above pad. 14" jack plate with 2" spacer's 16" total setback . Turning 6,000 rpm. 1/2 tank of fuel , no water in live well, ultrex 80 TM. moderate amount of tackle most in rear boxes , 220 lbs. driver and 150 lbs. passenger , seems like 78 mph is all i can get. Running 3/4" above pad turning 5,800 rpm same speed . is this about avg.

[21XDC]

I think a 28P Promax would be faster. I would think 3/4-1 inch below the pad would be better with less pitch.

[rclark1]

I think a 28P Promax would be faster. I would think 3/4-1 inch below the pad would be better with less pitch.

This! 29 is too large.

[rock2033]

This! 29 is too large.

not with 1.75's IMO

[av]

You should get 80mph with 2 , 82,83 solo

[crank68]

If you’re runnin above the pad you prolly need to ditch the sporty for a TM lower...

[gehol]

If you’re runnin above the pad you prolly need to ditch the sporty for a TM lower...

That makes no sense. Sportmaster is designed to run higher that the TM. OP said he is 1-1/4 inch ABOVE pad.

[21XDC]

I missed the SM part... I think it may be the weak link with a load.

[Bullet 250]

Sporty will work if you run light, had one on my 2004 21XDC with a 2005 250XS with1:62's ran 87.8 a few times, but from what you posted, you need a TM

[crank68]

As long as it’s a TM he can run it below but if it’s a SM and run it below ..... gonna be slowwwww...

[Bullet 250]

As long as it’s a TM he can run it below but if it’s a SM and run it below ..... gonna be slowwwww...

Yep

[kimclark]

As long as it’s a TM he can run it below but if it’s a SM and run it below ..... gonna be slowwwww...

So your saying a sportmaster 3/4" below pad is slower than a TM at 3/4" below pad ?

[onttr22]

Yes for sure.

[gehol]

Respectfully, I don't think so.
Keep in mind the OP is running above the pad.

[onttr22]

TM below pad will be quicker than Sporty below pad. TM will carry a load better on a 21xd.

[hyperflow]

We ran both a sporty and a TM on Canadabullets 21XDC/250XS with moderate load 2 guys, At 1/2" below pad they both ran identical speeds. Sporty was faster light load, the TM was faster when you loaded basspro shops in the boat. I know most guys think a TM is better but To me personally its a coin toss which one is better. They both have there advantages.

[crank68]

IMO...above or below the pad, a sport on a 21 with a “load” will not carry the weight a TM will.

[gehol]

IMO...above or below the pad, a sport on a 21 with a “load” will not carry the weight a TM will.

Ted, you may very well be correct. I disagreed only because I did not think a TM could be run above the pad. A member here has a 21SS with a sporty on a 300XS and posted a video on BBC of him running 102.
IMO, a sporty above the pad will be faster than a TM below the pad when the TM is below the pad a normal amount as in 2-3 inches below even on a 21. You will give up some hole shot. But, I have no direct knowledge and you may be correct.

[rock2033]

My buddy runs same setup 29 promax with a TM 1.62's below pad 82-84.

[hyperflow]

My buddy runs same setup 29 promax with a TM 1.62's below pad 82-84.

RPM must be pretty freaken low. A 29 promax ran 97mph@6000 rpm on my rig with 1.62.