outboard vs inboard
09-16-2009, 05:06 PM
#11
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outboard vs inboard
okie,
Peter made up some new tunnel pods and glassdave is doing the work to remove the old one and install the new.
Gas tanks are in.
Foredeck canopy area is repaired underneath. Transom area was just about finished until I decided to add one more.
I found a new in the box 2005 2.5 ros LH.
I'm excited.
Peter made up some new tunnel pods and glassdave is doing the work to remove the old one and install the new.
Gas tanks are in.
Foredeck canopy area is repaired underneath. Transom area was just about finished until I decided to add one more.
I found a new in the box 2005 2.5 ros LH.
I'm excited.
09-21-2009, 01:25 PM
#13
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Location: Oklahoma City, OK
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okie,
Peter made up some new tunnel pods and glassdave is doing the work to remove the old one and install the new.
Gas tanks are in.
Foredeck canopy area is repaired underneath. Transom area was just about finished until I decided to add one more.
I found a new in the box 2005 2.5 ros LH.
I'm excited.
Peter made up some new tunnel pods and glassdave is doing the work to remove the old one and install the new.
Gas tanks are in.
Foredeck canopy area is repaired underneath. Transom area was just about finished until I decided to add one more.
I found a new in the box 2005 2.5 ros LH.
I'm excited.
I think your 36 Classic with 1,120HP will be faster than any 36 Classic with inboards of the same total HP.
09-21-2009, 04:41 PM
#14
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I'll add my 2 cents, my 32B outboard had quad 2.5 offshores and in a light chop ran 137mph on GPS. That being said I can also say that here in S.fla it wasn't really a "pleasure" to use, you simply could not get it to "pop" until it hit 82mph as the air would back up in the tunnel. Now with twin 300xs's it a 100mph boat, will run through just about anything and gets 2-3 mpg.
10-11-2009, 08:08 AM
#15
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This power to weight outboard thing was from the eighties.Any inboard with 600+ hp has better power to weight than any outboard and face it anybody serious has at least 600.Then theres the torque issue which outboard guys don't seem to able to grasp because outboards don't make any.
Look at it this way.In our offshore race series our 600hp outboard class,2x 300 Mercs weigh in at 1800KG yet our 525 class weigh in at 3600kg.Double the weight but not double the HP.The 525 boats are always 10 -15mph faster.Why is that?
Because outboards don't make torque.
Look at it this way.In our offshore race series our 600hp outboard class,2x 300 Mercs weigh in at 1800KG yet our 525 class weigh in at 3600kg.Double the weight but not double the HP.The 525 boats are always 10 -15mph faster.Why is that?
Because outboards don't make torque.
10-11-2009, 08:23 PM
#18
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outboard vs inboard
Did you read post #5,( tzrider)
a 32 skater with quad outboards, 137 gps?
Also back in the "eighties", the 2.5 mercs were'nt available with the 300+ horsepower.
4x 2.5 merc outboards weighing in at approx. 1600 lbs, producing 1200 hp at 8000 rpm.
or
2 600 hp inboards weighing in at approx. 2534 producing 1200hp. (these weights are taken from Merc's latest high perf. catalogue)
What has the best power to weight ratio?
do the math.
Torque?
All I know is that unless a guy has a #six drive with his BIG power inboard or maybe the nxt, he'd better feather the throttles at take off or be spending some serious time and money on outdrive repair. The torque is nice to have but you have to be able to use it.
I had a 30 Spectre with triple 2.5 drag motors and it had a tremendous holeshot, much to the chagrin of many surprised big inboard boating buddies of mine. They could'nt take advantage of all that torque that they had unless we were all going about 50 mph already. ( so they would'nt blow their drives I guess).
Nobody wanted to run me from idle. I never had a problem with the mercury sportmasters.
Don't get me wrong, I know that once you get into the really big power, the outboards just can't keep up (twins over 800hp). But in the medium range 600-750 hp say in a 32-36 cat, if you have a dialed in triple and quad outboard set-up, I believe that it is very competitive with the inboards with equal hp.
And besides that, I like being the underdog
a 32 skater with quad outboards, 137 gps?
Also back in the "eighties", the 2.5 mercs were'nt available with the 300+ horsepower.
4x 2.5 merc outboards weighing in at approx. 1600 lbs, producing 1200 hp at 8000 rpm.
or
2 600 hp inboards weighing in at approx. 2534 producing 1200hp. (these weights are taken from Merc's latest high perf. catalogue)
What has the best power to weight ratio?
do the math.
Torque?
All I know is that unless a guy has a #six drive with his BIG power inboard or maybe the nxt, he'd better feather the throttles at take off or be spending some serious time and money on outdrive repair. The torque is nice to have but you have to be able to use it.
I had a 30 Spectre with triple 2.5 drag motors and it had a tremendous holeshot, much to the chagrin of many surprised big inboard boating buddies of mine. They could'nt take advantage of all that torque that they had unless we were all going about 50 mph already. ( so they would'nt blow their drives I guess).
Nobody wanted to run me from idle. I never had a problem with the mercury sportmasters.
Don't get me wrong, I know that once you get into the really big power, the outboards just can't keep up (twins over 800hp). But in the medium range 600-750 hp say in a 32-36 cat, if you have a dialed in triple and quad outboard set-up, I believe that it is very competitive with the inboards with equal hp.
And besides that, I like being the underdog
Last edited by davidmercury; 10-11-2009 at 08:28 PM.
10-12-2009, 10:16 PM
#20
