WELCOME TO RIVER DAVES PLACE

25' Speedster twin 400R VIDEO

sirbob

Well-Known Member
Joined
Jan 13, 2009
Messages
10,568
Reaction score
14,496
Is that a "stock" purchase from Horizon inventory or a consignment?

Nice package.
 

Mcob25rg

Well-Known Member
Joined
Aug 2, 2017
Messages
1,499
Reaction score
2,824
Overall, best model Elim has ever built
 

Gelcoater

Well-Known Member
Joined
Sep 26, 2009
Messages
21,606
Reaction score
36,017
Am I the only one who watchs these videos and then wonders what two 450s would run for speed. :rolleyes:
The orange/black/red 25 in production has switched power from 400s to 450s. So your wonders will soon be answered.
 

attitude

Well-Known Member
Joined
Jul 30, 2009
Messages
3,492
Reaction score
5,749
The orange/black/red 25 in production has switched power from 400s to 450s. So your wonders will soon be answered.
It’s an open bow so the the extra mph of the 450s will likely be cancelled out
 

Meaney77

Well-Known Member
Joined
Feb 25, 2009
Messages
7,552
Reaction score
8,056
I thought I read initially their was some concerns hanging that much weight off the back of a boat this size, is that no longer an issue/concern?

I thought it was mentioned in the build thread for the 1st one that popped...?
 

Gelcoater

Well-Known Member
Joined
Sep 26, 2009
Messages
21,606
Reaction score
36,017
I know it’s light but the open bow will take 7-10 off the top end
I think that’s a fair assumption.
If we were talking 400R’s

The torque difference between those engines are the big win in the 450 camp.
In a pure hp/liter on paper deal, the 400 kicks the 450’s ass.
But on a torque/liter deal in the real world?
Consider the displacement advantage, and displacement = torque.

It’s “only” 100 hp.

And I ask because I don’t know.
Is there any published data on torque numbers of both engines?
That would tell the story on paper.
Time will tell the story on the water.
Thumbs up thingy here:)
 

attitude

Well-Known Member
Joined
Jul 30, 2009
Messages
3,492
Reaction score
5,749
I think that’s a fair assumption.
If we were talking 400R’s

The torque difference between those engines are the big win in the 450 camp.
In a pure hp/liter on paper deal, the 400 kicks the 450’s ass.
But on a torque/liter deal in the real world?
Consider the displacement advantage, and displacement = torque.

It’s “only” 100 hp.

And I ask because I don’t know.
Is there any published data on torque numbers of both engines?
That would tell the story on paper.
Time will tell the story on the water.
Thumbs up thingy here:)
I guaranty the 450 boat will out accelerate the 400 boat all day, but as far as top end they should run about them same. Supposedly the 300r 27 speedster will out accelerate a 400r 27 speedster until about 80.
 

Gelcoater

Well-Known Member
Joined
Sep 26, 2009
Messages
21,606
Reaction score
36,017
I guaranty the 450 boat will out accelerate the 400 boat all day, but as far as top end they should run about them same. Supposedly the 300r 27 speedster will out accelerate a 400r 27 speedster until about 80.
I believe the 450’will pull a lot larger prop.

I should just shut up now as I’m just a trigger happy gel whore:D
 

FlyByWire

I just work here
Joined
Aug 13, 2016
Messages
2,429
Reaction score
6,910
Is there a major difference in handling and stability between the 27 and 25 speedsters?
 

RiverDave

In it to win it
Joined
Sep 13, 2007
Messages
123,245
Reaction score
150,655
I’m excited! Now that I am getting a little better maybe Preston and I can go run this thing!
 

Flying_Lavey

Dreaming of the lake
Joined
Feb 13, 2008
Messages
20,405
Reaction score
17,196
I know it’s light but the open bow will take 7-10 mph off the top end
It may not. If it were 400 to 400 comparison and the open bow and construction being the only difference, I would completely agree. But since this is a 400 closed bow to 450 open bow comparison, I don't think there will be much difference in speed if at all.

One thing to keep in mind is a cat will lose some top speed with an open bow because it can't carry the bow as well so there is more hull in the water on the top end. More wetted surface, more friction, less speed (assuming everything else is equal). Now with the 450 to 400 comparison we are adding about 250 lbs of leverage to the rear of the boat. Thus assisting the bow to lift which SHOULD result in less wetted surface and friction and give high too end #'s vs a open bow 400 boat. This is ignoring the extra 100 horsepower and unknown torque increase as well.

Sent from my LM-G710VM using Tapatalk
 

attitude

Well-Known Member
Joined
Jul 30, 2009
Messages
3,492
Reaction score
5,749
It may not. If it were 400 to 400 comparison and the open bow and construction being the only difference, I would completely agree. But since this is a 400 closed bow to 450 open bow comparison, I don't think there will be much difference in speed if at all.

One thing to keep in mind is a cat will lose some top speed with an open bow because it can't carry the bow as well so there is more hull in the water on the top end. More wetted surface, more friction, less speed (assuming everything else is equal). Now with the 450 to 400 comparison we are adding about 250 lbs of leverage to the rear of the boat. Thus assisting the bow to lift which SHOULD result in less wetted surface and friction and give high too end #'s vs a open bow 400 boat. This is ignoring the extra 100 horsepower and unknown torque increase as well.

Sent from my LM-G710VM using Tapatalk
That what I was saying, hints why I said I think they will both run 130 give or take a mph.
 

Done-it-again

Well-Known Member
Joined
Apr 3, 2016
Messages
8,820
Reaction score
10,839
Not sure why, but I thought this would run faster than 120's with twin 400's. For some reason i was thinking 130-140

Looks like a blast to drive, wouldn't mind owing one myself.
 
Top