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View Full Version : Twin engines in a 29' boat. Why?



Phat Matt
05-13-2005, 01:15 PM
This was brought up on another thread so I thought I would start one.
My reason is pretty simple. I think I will have less problems with 2 drives in the water. I will have 2 turn key engines that won't have to work as hard as a single one. I won't have to worry about blowing out drives with a single 850HP motor. My cruising rpm's will be less than a single motor. I can run 87 octane. :) Would you rather have a 4x4 or a 2x4? :D I can turn on a dime. It looks cool. :D My new boat was built for twins.

Havasu Hangin'
05-13-2005, 01:16 PM
This was brought up on another thread so I thought I would start one.
My reason is pretty simple. I think I will have less problems with 2 drives in the water. I will have 2 turn key engines that won't have to work as hard as a single one. I won't have to worry about blowing out drives with a single 850HP motor. My cruising rpm's will be less than a single motor. I can run 87 octane. :) Would you rather have a 4x4 or a 2x4? :D I can turn on a dime. It looks cool. :D My new boat was built for twins.
Two engines are easier to manuever in tight spaces...

ROZ
05-13-2005, 01:17 PM
Would you rather have a 4x4 or a 2x4?
Douglas fir or pressure treated? I guess is depends if you used galvanized hardware...

Rev. Williams
05-13-2005, 01:19 PM
Outdrives are like women..... One will work, and a second would be great, but IT'S GONNA COST YOU TWICE AS MUCH !!! :jawdrop: :D

FRENCHIE
05-13-2005, 01:19 PM
This was brought up on another thread so I thought I would start one.
My reason is pretty simple. I think I will have less problems with 2 drives in the water. I will have 2 turn key engines that won't have to work as hard as a single one. I won't have to worry about blowing out drives with a single 850HP motor. My cruising rpm's will be less than a single motor. I can run 87 octane. :) Would you rather have a 4x4 or a 2x4? :D I can turn on a dime. It looks cool. :D My new boat was built for twins.
AND I SAY....WHAT MATT SAID!!!! I WANTED TO BE LIKE MATT!!!!!
:hammer2: :hammer2: :D

Phat Matt
05-13-2005, 01:24 PM
Douglas fir or pressure treated? I guess is depends if you used galvanized hardware...
You could have gone the In-N-Out direction also. ;)
http://www.awaitingtheday.com/albums/album15/DSCN1409.jpg

rivercrazy
05-13-2005, 01:34 PM
Safety (redundancy)
Nothing sounds better than twins!
Much less stress on the O/D's
Bling
Gas bills! :)

Bad Baja
05-13-2005, 01:39 PM
29' outlaw, Twin 500HP, two bravo XR's. Can we say bullet proof!

ROZ
05-13-2005, 01:40 PM
You could have gone the In-N-Out direction also. ;)
http://www.awaitingtheday.com/albums/album15/DSCN1409.jpg
I like your line of thinking, but people get tired of hearing about a skinny mofo who eats like a pig and doesn't gain any weight....
Besides, the buns don't do well after being subjected to water....

bohica
05-13-2005, 01:50 PM
In a 29' boat I would of went with a single 525/575. How much speed will you gain with twin 496's - not that much. You'll have double the maintanence. The shops love twins, back one in and get paid for 2.
Insurance will be higher, they think with 2 motors it'll go twice as fast.
As far as reliability and piece of mind while offshore, buy vessel assist and a radio and let them tow you in.
The manueverability with twins can't be beat. Will your 29 get up on plane with only 1 motor. I had bigger boats and no way could you get it on plane with only 1. It would stay on plane with only one, almost shiat when the boat builder shut one motor off at 60mph on a test drive.
Most twins only run 1 power steering pump. Sucks when the motor that goes down is the one with the pump. Makes for a tuff job limping back on 1 motor with no steering.

MagicMtnDan
05-13-2005, 01:55 PM
Good points and, from the sound of things for at least one twin owner (with the "Life Saver" gel job), the speed gain has, so far, been questionable.
In a 29' boat I would of went with a single 525/575. How much speed will you gain with twin 496's - not that much. You'll have double the maintanence. The shops love twins, back one in and get paid for 2.
Insurance will be higher, they think with 2 motors it'll go twice as fast.
As far as reliability and piece of mind while offshore, buy vessel assist and a radio and let them tow you in.
The manueverability with twins can't be beat. Will your 29 get up on plane with only 1 motor. I had bigger boats and no way could you get it on plane with only 1. It would stay on plane with only one, almost shiat when the boat builder shut one motor off at 60mph on a test drive.
Most twins only run 1 power steering pump. Sucks when the motor that goes down is the one with the pump. Makes for a tuff job limping back on 1 motor with no steering.

Formula Dude
05-13-2005, 01:56 PM
Twins in a 29 V is good especially if the boat is 8000 lbs+. On a cat you could accomplish the same with a single application with more horsepower.
With twins on V with stock 454's you burn a minimum of 25+ gals. per hour cruising at just 50 miles per hour. If you do your own maintenance twins are a bitch especially a boat that small - no space. Double everything, from impellers, to filters and oil.

MagicMtnDan
05-13-2005, 01:57 PM
Is this like the question, "why do women have two boobs?"

Tom Brown
05-13-2005, 01:59 PM
Go for twin blenders. The chicks will be all over it. :cool:

LHC30Victory
05-13-2005, 02:00 PM
all I can say is:
Twins are GREAT

wsuwrhr
05-13-2005, 02:00 PM
Safety (redundancy)
Nothing sounds better than twins!
Much less stress on the O/D's
Bling
Gas bills! :)
Word up.
Brian

spectras only
05-13-2005, 02:05 PM
Have twins in a 257' boat [ 24 without the built in swimstep] :cool: .Is it overkill ? Not when you crossing 26+ miles in snotty weather , and seatow is min 1/2 hour away :wink: .
http://www3.telus.net/spectrasonly/000_0144%20copy.jpg

rivercrazy
05-13-2005, 02:08 PM
I should have said "nothing sounds better than screaming twins!"
One other thing is a much more stable ride in the rough and going fast

INSman
05-13-2005, 02:09 PM
Yeah, what Ted said !!!!! :cool:
all I can say is:
Twins are GREAT

stoker
05-13-2005, 02:16 PM
In a 29' boat I would of went with a single 525/575. How much speed will you gain with twin 496's - not that much. You'll have double the maintanence. The shops love twins, back one in and get paid for 2.
Insurance will be higher, they think with 2 motors it'll go twice as fast.
As far as reliability and piece of mind while offshore, buy vessel assist and a radio and let them tow you in.
The manueverability with twins can't be beat. Will your 29 get up on plane with only 1 motor. I had bigger boats and no way could you get it on plane with only 1. It would stay on plane with only one, almost shiat when the boat builder shut one motor off at 60mph on a test drive.
Most twins only run 1 power steering pump. Sucks when the motor that goes down is the one with the pump. Makes for a tuff job limping back on 1 motor with no steering.
Why didn't you tell me all this when I bought my last boat?

Chase
05-13-2005, 02:19 PM
My sister has twins........... :sleeping:

MAINEVENT
05-13-2005, 02:50 PM
You forgot the main reason "Cuz that's what YOU wanted" :wink:

MagicMtnDan
05-13-2005, 03:01 PM
Why twins?
Imagine her with only one chest puppie :eek:
http://www.bikernet.com/news/images/PhotoID10771.jpg

LHC30Victory
05-13-2005, 03:14 PM
God bless you MMD :rollside:

Phat Matt
05-13-2005, 03:29 PM
I like your line of thinking, but people get tired of hearing about a skinny mofo who eats like a pig and doesn't gain any weight....
Besides, the buns don't do well after being subjected to water....
I thought you would like that. What did you eat today? :eat: :)

wsuwrhr
05-13-2005, 03:29 PM
Why twins?
Imagine her with only one chest puppie :eek:
http://www.bikernet.com/news/images/PhotoID10771.jpg
And imagine her twin sister...
Brian

TPI
05-13-2005, 03:32 PM
INSman,
How does your boat run with two 496's. I think I saw a 29 out at Elsinore with a single 800-900 HP Whipple motor that ran about 88 mph? I did not hear how it handled at that speed though?
Thanks

jbone
05-13-2005, 03:32 PM
If you've got the $$$ why not?

Phat Matt
05-13-2005, 03:33 PM
They both look good!
http://www.eticketboats.com/luxury_cat/luxury_cat-Images/35.jpg http://www.bikernet.com/news/images/PhotoID10771.jpg
:D

Phat Matt
05-13-2005, 03:35 PM
Is that your boat?
Nope. Mine is in the mold. It'll have twins though. :)

LHC30Victory
05-13-2005, 03:38 PM
Nope. Mine is in the mold. It'll have twins though. :)
And I think without the IMCO stuff. Right? Lets be sensible now.....There must be money left for a certain piece of metal and stone...

Phat Matt
05-13-2005, 03:41 PM
And I think without the IMCO stuff. Right? Lets be sensible now.....There must be money left for a certain piece of metal and stone...
I was just saying those were a nice looking set of twins. Mine will look like this...XR's with full Imco hydraulic steering.
http://www.eticketboats.com/luxury_cat/luxury_cat-Images/2005-Luxury-Cat-3.jpg
The left over money goes toward a stereo and generator. ;)

Beer-30
05-13-2005, 03:41 PM
I know of a boat like mine that had a 1000 HP 10-71 motor. The guy wanted to hit 90. It did 95 but was not stable. Sound about right for a V with that HP. They advertise the boat weighing "5300", but it is unknown at what level fuel, with what motor, etc.
I would expect a 29 Mag to be somewhat less, due to less freeboard and a foot or so shorter.

Steamin' Rice
05-13-2005, 04:00 PM
.... I think I saw a 29 out at Elsinore with a single 800-900 HP Whipple motor that ran about 88 mph? I did not hear how it handled at that speed though?
Thanks
I think you are correct.. They built a 29 with a whippled 500EFI (I think around 800 HP) and top speed was about 88 MPH. I didn't ride in this one, but don't remember hearing anything negative about the ride at top speed.. I would still vote for twins over a single big HP motor, but twin stock motors don't look as cool as a single quad rotor.. :D

INSman
05-13-2005, 04:25 PM
Gary, check your PM's
Blane
INSman,
How does your boat run with two 496's. I think I saw a 29 out at Elsinore with a single 800-900 HP Whipple motor that ran about 88 mph? I did not hear how it handled at that speed though?
Thanks

TPI
05-14-2005, 06:24 AM
The boat I am thinking of had a 3.3 whipple on it and aluminum heads. It might have started out as a 500 at some point. It sounded good that day, I just didnt know how it ran factually.
You will definately gain quite a bit of stability with twins, as the boat does not want to torque to one side when you get on it. A big power single can have this problem(torquing to one side), and then it will give you the thrill of "flopping" from side to side(usually above 80 mph). I dont even want to say those two words, but the initals are (CW). Twins are cool and usually easier to control at high speeds.

HOSS
05-14-2005, 06:34 AM
Douglas fir or pressure treated? I guess is depends if you used galvanized hardware...
Damn good bro,,,,,,,I`m slowing down. Damn good.

shockwavebd
05-14-2005, 06:58 AM
Once you go twins............ya never go back....................... :D

Big Warlock
05-14-2005, 09:43 AM
And it sounds like you guys thought it out. I am looking forward to seeing your boats when they come out. I am not opposed to twins. Heck of a lot easier to manuever. I was thinking of the cost verses the speed increase, if any.
I hope to have a twin setup in something by summer of '06. I have twin diesels in the 50 footer and it's a must. Next boat there will also have bow thruster!
Good luck guys. Keep posting the pics of the build. It really is interesting.
I will say that last weekend we watched Dexter in his 29 foot Shockwave handle the rough stuff offshore. Sure looked that the boat was handling great!!

Dr. Eagle
05-14-2005, 10:34 AM
Two engines are easier to manuever in tight spaces...
No kidding, having the ability to reverse one screw makes docking much easier.

HCS
05-14-2005, 10:50 AM
I thought about putting twin screws in my ski boat. :rolleyes:
Wait, I did have twin screws once. Sure was fun. :D

Panic Button
05-14-2005, 10:58 AM
Because you can... Alot of East Coast boats over 28" have twins.

Kilrtoy
05-16-2005, 03:44 PM
This was brought up on another thread so I thought I would start one.
My reason is pretty simple. I think I will have less problems with 2 drives in the water. I will have 2 turn key engines that won't have to work as hard as a single one. I won't have to worry about blowing out drives with a single 850HP motor. My cruising rpm's will be less than a single motor. I can run 87 octane. :) Would you rather have a 4x4 or a 2x4? :D I can turn on a dime. It looks cool. :D My new boat was built for twins.
I dont think that thing turns on a dime.......

Beer-30
05-16-2005, 03:51 PM
I dont think that thing turns on a dime.......
I know what he meant. One of the benefits to twins that is obvious is docking. One forward, one reverse. The boat will just spin in a circle, "on a dime" if you will. I don't think he meant at speed.

Phat Matt
05-16-2005, 04:06 PM
I dont think that thing turns on a dime.......
How about a quarter? ;)

Kilrtoy
05-16-2005, 04:22 PM
How about a quarter? ;)
Maybe a Silver Dollar.....

Sane Asylum
05-16-2005, 08:01 PM
all I can say is:
Twins are GREAT
What he said..........
Do the Maintenance yourself.......You'll be sweatin like a HO on dollar day when you're squeazin around motors doing maintenance but it's worth it when you mash the sticks with twins......

Sane Asylum
05-16-2005, 08:05 PM
Maybe a Silver Dollar.....
Only with Whackas...........
Matt, if you go with the twin OB's get the one's without the pull cords..... :rolleyes:

H20 Toie
05-16-2005, 08:40 PM
Why not
http://www2.***boat.com/image_center/data/520/2573Cig_trip_43_.JPG

Phat Matt
05-16-2005, 09:15 PM
Only with Whackas...........
Matt, if you go with the twin OB's get the one's without the pull cords..... :rolleyes:
I got a couple of HO's coming. :D

Sleek26
05-16-2005, 09:31 PM
Why twins?
Imagine her with only one chest puppie :eek:
http://www.bikernet.com/news/images/PhotoID10771.jpg
I'm convinced :D :D

MagicMtnDan
05-16-2005, 09:35 PM
http://www2.***boat.com/image_center/data/520/672TwinCheeks.jpghttp://images.allposters.com/images/MMPH/253953.jpg
http://www2.***boat.com/image_center/data/520/672hot_twins_botd1.jpghttp://www2.***boat.com/image_center/data/520/672hot_twins_botd2.jpg

SHAKEN Not Stirred
05-16-2005, 10:19 PM
I won't have to worry about blowing out drives with a single 850HP motor.
Oh and what is that suppose to mean....Hmmmmmmm ????...... :idea:

Phat Matt
05-16-2005, 10:29 PM
Oh and what is that suppose to mean....Hmmmmmmm ????...... :idea:
I think if anybody knows what that means it's you. :2purples: :)

Phat Matt
05-16-2005, 10:30 PM
Does anybody do triples anymore? ;)
http://www2.***boat.com/image_center/data/500/1524TRIPLETS.jpg

Sportin' Wood
05-17-2005, 04:44 AM
Matt there is something wrong with your picture, It has black lines on it! :D

Phat Matt
05-17-2005, 08:03 AM
Matt there is something wrong with your picture, It has black lines on it! :D
I hate it when that happens! ;)

UnionJack
05-17-2005, 09:26 AM
matt... what motors?

Phat Matt
05-17-2005, 09:34 AM
matt... what motors?
496 HO's