Whipple 600sci upgrade documentation
12-01-2009 | 06:01 AM
#51
Platinum Member
Joined: Oct 2000
Posts: 9,398
Likes: 33
approx 800 hp/tq.. the Merc 700 which is rumered to put out 750-770hp is max on that drive... they were designed for this purpose only.. gap between #6 and the bravo.
12-01-2009 | 09:28 AM
#52
Thread Starter
Chris
Joined: Sep 2005
Posts: 1,426
Likes: 1
From: Snohomish, WA
Getting a little off track here... but there is a twin-turbo Nordic Thor that is putting nearly 1400 hp thru an NXT, with no failures yet. I believe he has a BAM transmition waiting in the wings. The weak link on the NXT is supposedly the trannny.
Chris
Chris
12-01-2009 | 11:25 AM
#54
Registered
Joined: Oct 2007
Posts: 764
Likes: 0
From: Chattanooga, Tn
12-01-2009 | 02:44 PM
#55
Thread Starter
Chris
Joined: Sep 2005
Posts: 1,426
Likes: 1
From: Snohomish, WA
http://www.offshoreonly.com/forums/n...2009-thor.html
I am not a salesperson for Dustin.... just an extremely happy customer!
Chris
12-01-2009 | 05:13 PM
#56
Charter Member # 545
Joined: Dec 2000
Posts: 2,152
Likes: 2
From: Port Tobacco MD/Cape Coral Fl
12-01-2009 | 10:51 PM
#57
Registered
Joined: Oct 2000
Posts: 1,436
Likes: 5
From: Fresno, CA, 93722, USA
The only weakness in the NXT is really the tranny. We've used one on a 632ci 1300hp engine for 2.5 seasons in a single 30' Eliminator V. Blew tranny in first few hours which was do to the shifting at 800rpm (yes it idles at 800). I installed a shift interupt and its made it ever since. Brings rpm to 200 during shifts. We've got hundreds of NXT's running 800+ with zero issues.
12-01-2009 | 10:56 PM
#58
Registered
Joined: Oct 2000
Posts: 1,436
Likes: 5
From: Fresno, CA, 93722, USA
Why is it that a 525 with a whipple can make 775hp with only 7 psi of boost and a 600sci needs 10-12 to make 750hp? I realize that the 525 has a little more comp. and a little bigger cam. I'm not trying to secound guess any one but that still sounds little a lot of boost. My new nordic 28 is being built with the 600sci and i know i will need more power when the warranty is up but i don't think i would fill good about running that much boost on pump gas. How much boost does the 700sci have to make 700hp? The cam is only slighty bigger in the 700 over the 600.
chris and eddie thanks for all the info
chris and eddie thanks for all the info
Mercury 1075sci runs between 12-13psi of boost with 91 octane and 8.0:1 compression. Also run 34deg of timing vs. 28deg of the 700sci. 700sci also works with 89 octane in stock trim so there's quite a bit left on the table.
12-02-2009 | 05:56 AM
#59
Platinum Member
Joined: Oct 2000
Posts: 9,398
Likes: 33
Brad from Mercury.. Trond and Terry from NorTech.. So Stay around the 800 mark or less... same as the stock 700 Merc's... on heavier and twin motored boats this is the max.. may be different on smaller and single applications like Dustin stated.. I'm going by a conversation as my boat was being built and I paniced when I saw the NXT transom assembly coupled to my 6 drive.. I was told leave it stock, and I wouldnt have a problem...No problems to date with appr. 120 hours
12-02-2009 | 08:22 AM
#60
Registered
Joined: Oct 2007
Posts: 764
Likes: 0
From: Chattanooga, Tn
Stage 2 is a conservative 830hp.
The only weakness in the NXT is really the tranny. We've used one on a 632ci 1300hp engine for 2.5 seasons in a single 30' Eliminator V. Blew tranny in first few hours which was do to the shifting at 800rpm (yes it idles at 800). I installed a shift interupt and its made it ever since. Brings rpm to 200 during shifts. We've got hundreds of NXT's running 800+ with zero issues.
The only weakness in the NXT is really the tranny. We've used one on a 632ci 1300hp engine for 2.5 seasons in a single 30' Eliminator V. Blew tranny in first few hours which was do to the shifting at 800rpm (yes it idles at 800). I installed a shift interupt and its made it ever since. Brings rpm to 200 during shifts. We've got hundreds of NXT's running 800+ with zero issues.
we have 17x35 Harrings now what you think the rpms are going to come out to be
