Like Tree0Likes

big question

Reply
Old 12-15-2005, 10:19 AM
  #1
Registered
Thread Starter
 
Join Date: Nov 2004
Location: prairieville,la
My Boats: 2004 39 MTI
Posts: 457
Cool big question

im curious i have a 2001 42 tiger with no step. if i stagger the motors would i increase any speed im looking to put a little more wait in the front it rides little heavy in the ass end .. thanks for your help in advance

but i also want more speed ya.. and staggered looks really cool...
AeroSpeedMarine is offline  
Reply With Quote
Old 12-15-2005, 10:32 AM
  #2
GLH
Platinum Member
Platinum Member
 
GLH's Avatar
 
Join Date: Dec 2002
Location: Burlington, VT
My Boats: Azimut
Posts: 15,267
Default Re: big question

Seems a lot of expense for minimal gain. Re-Work stringers, re-rig the whole thing, redo the transom, ect... Parking it will also be fun!!!

Also I doubt the stringer layout will easily adapt to stagger. Notwithstanding with the bulkhead space available it would only be a short stagger.

Those boats also react very adversly to moving the CG forward. Just the difference between a cover girl cabin and an extended CG cabin is 2-3 mph, all other things being equal.

From what Otis experienced also proping his boat, when the stern was higher (produced with a 5 blade prop instead of 4) the boat plowed and would not get up to speed.

For the money your talking you could easily modify your mills to 725-750 HP and get in the low to mid 80's...which in my humble opinion is the max you can put thru an XR kind of setup and have a certain amount of drive life left if your gentle to it.

Just my take on it, hope it helps.

G.L.
GLH is offline  
Reply With Quote
Old 12-15-2005, 10:43 AM
  #3
Registered
Thread Starter
 
Join Date: Nov 2004
Location: prairieville,la
My Boats: 2004 39 MTI
Posts: 457
Default Re: big question

Thanks I Was Just Curious Im Dynod At 720 Now
1:36 Gears With Imco Sc Drives Im Working On Props Now The 28s Were To Big Only Turning 4300 Rpms At 78 Miles An Hour Though.
AeroSpeedMarine is offline  
Reply With Quote
Old 12-15-2005, 10:48 AM
  #4
Registered
Trade Score: (1)
 
kaama82's Avatar
 
Join Date: Jan 2001
Location: Ida, Mi
My Boats: 32 Skater
Posts: 553
Default Re: big question

I thought year 2000 were the last non stepped tiger???
kaama82 is offline  
Reply With Quote
Old 12-15-2005, 10:50 AM
  #5
GLH
Platinum Member
Platinum Member
 
GLH's Avatar
 
Join Date: Dec 2002
Location: Burlington, VT
My Boats: Azimut
Posts: 15,267
Default Re: big question

Quote:
Originally Posted by kaama82
I thought year 2000 were the last non stepped tiger???
Couple of them are 2001 straight bottoms.

42P has one and there is an all white one I see for sale now and then with bulldogs in it.
GLH is offline  
Reply With Quote
Old 12-15-2005, 10:54 AM
  #6
Registered
VIP Member
 
Join Date: Jan 2004
Location: Boca Raton, FL
My Boats: None
Posts: 3,682
Default Re: big question

GLH is right. Too much expense to change it over and you might not realize the performance you want.

Are you sure you REALLY have the 720 HP? Should be spinning those 28's much higher with that much juice. Why the 1.36:1 reduction?
Every boat like yours had 1.50:1 that I ever surveyed.
Edward R. Cozzi is offline  
Reply With Quote
Old 12-15-2005, 11:01 AM
  #7
GLH
Platinum Member
Platinum Member
 
GLH's Avatar
 
Join Date: Dec 2002
Location: Burlington, VT
My Boats: Azimut
Posts: 15,267
Default Re: big question

Quote:
Originally Posted by 42PLAYBOY
Thanks I Was Just Curious Im Dynod At 720 Now
1:36 Gears With Imco Sc Drives Im Working On Props Now The 28s Were To Big Only Turning 4300 Rpms At 78 Miles An Hour Though.
I have no idea how to prop for a 1:36 ratio but 4300 is letargic as you undoubtebly know.

Seams 720 should be fine if you prop it properly.

I am not sure what my HP is but I would venture in the 670 range with a 1.5 ratio and I have seen 81.7 on GPS running 30" labbed and hitting the rev limiter at 5300. I just got some 32" and have not really tested properly but I was hitting 82.2 at around 4900 rpm.

I have also a set of pulleys to up my boost but I have not put them on yet. If with the pulley's I don't get up to 52-5300 rpm, I will have Trottle up labbed the 32"s and should be as good as I can think for the power. My guess is 83-84 max and I can live with that... With my rig I find I pass a LOT more people at 60-65MPH in the sh!t than at 82 on a flat boring Catamaran 6" fluff days.
GLH is offline  
Reply With Quote
Old 12-15-2005, 11:03 AM
  #8
GLH
Platinum Member
Platinum Member
 
GLH's Avatar
 
Join Date: Dec 2002
Location: Burlington, VT
My Boats: Azimut
Posts: 15,267
Default Re: big question

Also I do not recall if you have an Extended Cover Girl cabin or not...

Make sure you have NOTHING stored in the nose of you boat, that will kill your speed on those straight bottomed Tigers.
GLH is offline  
Reply With Quote
Old 12-15-2005, 11:05 AM
  #9
Registered
Thread Starter
 
Join Date: Nov 2004
Location: prairieville,la
My Boats: 2004 39 MTI
Posts: 457
Default Re: big question

Quote:
Originally Posted by Edward R. Cozzi
GLH is right. Too much expense to change it over and you might not realize the performance you want.

Are you sure you REALLY have the 720 HP? Should be spinning those 28's much higher with that much juice. Why the 1.36:1 reduction?
Every boat like yours had 1.50:1 that I ever surveyed.
I WENT WITH THE 136 SO I COULD PUT MORE POWER TO THE DRIVES.
AeroSpeedMarine is offline  
Reply With Quote
Old 12-15-2005, 11:07 AM
  #10
GLH
Platinum Member
Platinum Member
 
GLH's Avatar
 
Join Date: Dec 2002
Location: Burlington, VT
My Boats: Azimut
Posts: 15,267
Default Re: big question

26" should be easy enough for you to find and test... those babies will be seriously spinning!
GLH is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
SKRAMER
General Boating Discussion
42
03-05-2006 09:17 AM
AeroSpeedMarine
Cigarette
11
12-15-2005 02:06 PM
TeamPSI
General Q & A
8
05-15-2005 07:30 AM
FunHome
General Boating Discussion
54
03-16-2004 12:39 PM
SinkorSwim
General Q & A
28
12-11-2003 12:38 PM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 05:56 AM.


Copyright 2011 OffShoreOnly. All rights reserved.