User Tag List
Results 16 to 30 of 59
Thread: G2 vs Optimax
-
10-03-2016, 08:13 AM #16Screaming And Flying!
- Join Date
- Jun 2007
- Location
- Singapore/Melbourne/Italy
- Posts
- 9,097
- Thanks (Given)
- 1008
- Thanks (Received)
- 354
- Likes (Given)
- 4297
- Likes (Received)
- 1953
- Mentioned
- 7 Post(s)
- Tagged
- 0 Thread(s)
one sounds like crank and other is prop
-
10-03-2016, 08:19 AM #17Scream And Fly VIP
- Join Date
- May 2001
- Location
- Hickory NC
- Posts
- 5,579
- Thanks (Given)
- 18
- Thanks (Received)
- 248
- Likes (Given)
- 203
- Likes (Received)
- 462
- Mentioned
- 4 Post(s)
- Tagged
- 1 Thread(s)
Torque is at prop shaft so the difference in gear ratio has some to do with it.
-
10-03-2016, 09:33 AM #18Member
- Join Date
- Jul 2009
- Location
- Fargo
- Posts
- 36
- Thanks (Given)
- 1
- Thanks (Received)
- 1
- Likes (Given)
- 2
- Likes (Received)
- 23
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
I haven't seen Dyno's and I can't comment on the numbers, but I can tell you that between my 2014 Mercury 250 Pro XS and the 15 G2 250 HO, the G2 is much stronger out of the hole. How do I know that? When I run my Bravo 1 FS 24P on my mercury, I need to run it extremely high on the jack plate and roll on the throttle to come out of the hole or the engine will simply bog if I just hit it. (This is almost certainly due to improper venting on the prop, not lack of torque on the Pro XS) But, with the exact same prop switched over to the G2, that motor doesn't care where the motor height is set at or how fast the throttle comes on...it just rips the boat out of the hole. Having said all that, I'm confident the Merc would do the same thing if it weren't pushing a boat twice as heavy. So...there ya go, clear as muddy water and highly scientific evidence that different motors on different boats performed differently although they both had the same prop.
-
10-03-2016, 12:16 PM #195000 RPM
- Join Date
- Sep 2012
- Location
- Florida
- Posts
- 440
- Thanks (Given)
- 2
- Thanks (Received)
- 15
- Likes (Given)
- 9
- Likes (Received)
- 84
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
600 ft lb of torque on a g2? Can't see it.
-
10-03-2016, 03:17 PM #20
Torque is cubic inch unless turbo charged!
Checkmate 2002 Convincor 270 496 MAG-HO
2003 Cougar 22MTR w/300xs SOLD
90 21Skater w/300xs - sold
98 STV Euroski w/280 - sold
2006 Trailblazer SS 6.0l 395hp
-
10-03-2016, 06:52 PM #21Member
- Join Date
- Jul 2015
- Location
- NYC
- Posts
- 55
- Thanks (Given)
- 19
- Thanks (Received)
- 3
- Likes (Given)
- 7
- Likes (Received)
- 5
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
On the prop or on the shaft, it can't be that robs that much.
600 torque on 300 hp, I see double torque possible only on diesel motors, no way on the gasser of any kind.
-
10-03-2016, 06:57 PM #22Member
- Join Date
- Jul 2015
- Location
- NYC
- Posts
- 55
- Thanks (Given)
- 19
- Thanks (Received)
- 3
- Likes (Given)
- 7
- Likes (Received)
- 5
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
-
10-03-2016, 07:25 PM #23Screaming And Flying!
- Join Date
- Jun 2007
- Location
- Singapore/Melbourne/Italy
- Posts
- 9,097
- Thanks (Given)
- 1008
- Thanks (Received)
- 354
- Likes (Given)
- 4297
- Likes (Received)
- 1953
- Mentioned
- 7 Post(s)
- Tagged
- 0 Thread(s)
-
NICE PAIR liked this post
-
10-03-2016, 07:55 PM #24Member
- Join Date
- Jul 2015
- Location
- NYC
- Posts
- 55
- Thanks (Given)
- 19
- Thanks (Received)
- 3
- Likes (Given)
- 7
- Likes (Received)
- 5
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
-
10-03-2016, 09:15 PM #25Screaming And Flying!
- Join Date
- Jun 2007
- Location
- Singapore/Melbourne/Italy
- Posts
- 9,097
- Thanks (Given)
- 1008
- Thanks (Received)
- 354
- Likes (Given)
- 4297
- Likes (Received)
- 1953
- Mentioned
- 7 Post(s)
- Tagged
- 0 Thread(s)
You dont need any movement to create torque.
Just ask an electric motor.
-
Davidlake liked this post
-
10-04-2016, 07:59 PM #26
The opti has a bad dead spot below 2500 ish depending on prop boat etc. plus it has a bigger gear so the 24 feels bigger. You would have to run a 27/28 on the g2 to go the same speed at 6k but the g2 will have more bottom end even if it had the same gear.
-
10-05-2016, 01:36 AM #27Member
- Join Date
- Jul 2009
- Location
- Fargo
- Posts
- 36
- Thanks (Given)
- 1
- Thanks (Received)
- 1
- Likes (Given)
- 2
- Likes (Received)
- 23
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
-
10-07-2016, 08:21 PM #28
Maybe you guys have better luck with them on light boats but my brothers nehibor just bought a brand new gen 1 300 and it just popped with about 50 hrs on it. There's also a commercial guy in town that repowered with a pair of 300 G2's and had power head failure on both engines. From what I heard he kicked and screamed enough and they gave him 2 brand new engines. I think they have some good ideas but they need some more fine tuning
-
10-11-2016, 10:30 PM #295000 RPM
- Join Date
- Aug 2007
- Location
- DE WITT AR
- Posts
- 276
- Thanks (Given)
- 3
- Thanks (Received)
- 6
- Likes (Given)
- 1
- Likes (Received)
- 6
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Guess I need to get rid of my 525Sc in my 29 Fountain and mount a new G2etec on a bracket since it has the same 600 Lbs of torque. Total bs. 600 lbs of torque from the G2??? My 4 liter Monty V-8 did not have 400 ft lbs and I know that the only thing a G2 does better is go at least twice as far on a gallon on gas.
-
10-12-2016, 07:15 AM #30
They claim a 20% increase in torque over the competitors. The 1.85 gear of the G2 is 14% lower then the 1.62 of the Merc 250 pro xb they compared to. So just the ratio alone gets it close to their claims. What they dont tell you is you need ~5" more pitch to go the same speed as the merc at 6k.
The BRP chart shows the merc making just shy of 500ft-lb but Dave Bush racing says the 300xs makes 306ft-lb at the prop. Im not sure where the BRP 600# came from. Maybe someone should drag a G2 over to Dave's dyno and get the facts
Similar Threads
-
1999 200 optimax or 2004 250 xs optimax?
By vmax80096 in forum Technical DiscussionReplies: 7Last Post: 07-26-2018, 12:34 PM -
07 150 optimax
By rickriddle in forum Technical DiscussionReplies: 5Last Post: 09-05-2013, 08:07 AM -
'99 Optimax 135
By J&G SC in forum Four Stroke and Direct Injected Two Stroke EnginesReplies: 0Last Post: 07-03-2008, 09:57 AM -
225 efi vs 225 optimax
By GTRMick in forum Four Stroke and Direct Injected Two Stroke EnginesReplies: 3Last Post: 05-12-2008, 07:14 PM