Like Tree0Likes

INFO on Banks Twin Turbo BBC

Reply
Old 08-30-2007, 11:23 AM
  #1
VIP Member
VIP Member
Thread Starter
 
Bad Girl's Avatar
 
Join Date: Nov 2002
Location: Great Lakes
My Boats: 47 Special Edition 600 SCI's
Posts: 368
Default INFO on Banks Twin Turbo BBC

I have a pair of Galr bank twin turbo intakes , carbs and the turbo mounts. anyone have more info when these were popular and if anyone has parts to make original motors. I have one pair of valve covers with the Merc decal saying they are 475hp. Any literature or Merc books out there??

thanks for any help finding this stuff. I can either build a pair of these motors if I can find the turbos and exhaust parts or modify to make something else. prefer to have all originals.

thanks, Ken
__________________
47 Lightning SE
Bad Girl is offline  
Reply With Quote
Old 08-30-2007, 12:06 PM
  #2
Easily Distracted
Platinum Member
 
Racegirl3's Avatar
 
Join Date: Sep 2004
Location: Bucyrus, Ohio
My Boats: Former Boat Btch, now I just dream
Posts: 22,944
Default

No info for ya but are you guys comin over to Kelleys Island this weekend?
__________________
Bad Girls Make Good Company
Racegirl3 is offline  
Reply With Quote
Old 08-30-2007, 12:14 PM
  #3
VIP Member
VIP Member
Thread Starter
 
Bad Girl's Avatar
 
Join Date: Nov 2002
Location: Great Lakes
My Boats: 47 Special Edition 600 SCI's
Posts: 368
Default Kelleys

Yes, we will go over Friday and start practicing for the 'BAR CRAWL'!
Also, maybe the bay if I can call in a favor at Foxes dock.
I 'm getting a set of props blueprinted this week and supposed to have them by Friday morning. without wheels I not going anywhere! Maybe you can go for a ride if we get time? maybe a a sea trial before you get you own race team???!!!
DOG (Ken)
When you heading over??
__________________
47 Lightning SE
Bad Girl is offline  
Reply With Quote
Old 08-30-2007, 12:22 PM
  #4
Easily Distracted
Platinum Member
 
Racegirl3's Avatar
 
Join Date: Sep 2004
Location: Bucyrus, Ohio
My Boats: Former Boat Btch, now I just dream
Posts: 22,944
Default

Ill be there Saturday ... somewhere around noon. Ill have Lucididee with me and a few others. We need to get her to PIB for the "experience" A ride maybe a possibility this weekend ... that would be cool. Thanks Ken!!
__________________
Bad Girls Make Good Company
Racegirl3 is offline  
Reply With Quote
Old 08-30-2007, 02:33 PM
  #5
Registered
 
phughes69's Avatar
 
Join Date: Dec 2001
Location: St. Clair Shores, MI
My Boats: 1980 Wellcraft Scarab 377 twin turbo, 1984 Formula 242 LS SBC/ Alpha, 1979 Sea Ray 240 SRV Flybridge w/ twin 480's
Posts: 1,601
Default

Bad Girl, do you have any pictures of the intakes, turbos, or any of the other stuff. The Gale Banks turbo was factory installed on my Scarab. I have the original Mercruiser owners manual for it.
phughes69 is offline  
Reply With Quote
Old 08-30-2007, 09:18 PM
  #6
Platinum Member
Platinum Member
Trade Score: (3)
 
TomFTM's Avatar
 
Join Date: Dec 2000
Location: Glen Cove ,NY 11542
My Boats: 37 Outerlimits,42 Searay,17 Boston Whaler
Posts: 2,058
Default

Those motors were produced by merc hi perf. around 1985-86. They
were 454's with log style exhaust manifolds with water cooled turbo housings . , no innercooler They did not have waste gates in the housing , they used a bleed of hole to bleed the boost . We rebuilt one of these and put it in my 24 superboat back in the early 90's. I had turbonectics in CA build me stainless turbo housings . after the orignals rotted out. We made the bleed off hole smaller ,hense we ran about 12lbs of boost. I think
stock boost was about 7lbs. Tom
TomFTM is offline  
Reply With Quote
Old 08-31-2007, 09:41 AM
  #7
Registered
 
phughes69's Avatar
 
Join Date: Dec 2001
Location: St. Clair Shores, MI
My Boats: 1980 Wellcraft Scarab 377 twin turbo, 1984 Formula 242 LS SBC/ Alpha, 1979 Sea Ray 240 SRV Flybridge w/ twin 480's
Posts: 1,601
Default

Quote:
Originally Posted by TomFTM View Post
they used a bleed of hole to bleed the boost . We rebuilt one of these and put it in my 24 superboat back in the early 90's. I had turbonectics in CA build me stainless turbo housings . after the orignals rotted out. We made the bleed off hole smaller ,hense we ran about 12lbs of boost. I think
stock boost was about 7lbs. Tom
Tom where in the housing is the bleed hole? I have this setup on my boat and the previous owner put wastergates on it. He said it can make about 12 lbs of boost, but last time I had the boat out I was not watching to see how much boost it was making, plus I was not at full throttle
phughes69 is offline  
Reply With Quote
Old 08-31-2007, 10:02 PM
  #8
Registered
 
Turbojack's Avatar
 
Join Date: Sep 2001
Location: Houston, TX, USA
My Boats: 2003 Eliminator 30' Daytona
Posts: 2,285
Default

Quote:
Originally Posted by phughes69 View Post
Tom where in the housing is the bleed hole? I have this setup on my boat and the previous owner put wastergates on it. He said it can make about 12 lbs of boost, but last time I had the boat out I was not watching to see how much boost it was making, plus I was not at full throttle
The hole is in the bottom to bypass some exhast. If the turbo was a 301e if the hole was 3/8" boost was 12 lbs. With waste gates the max boost is set by the wastegate since the wastegate is what is bypassing the exhaust. The hole in the turbo housing was in place of a wastegate.
Turbojack is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
TeamSaris
Superboat
7
03-02-2006 09:31 PM
CIG3
General Q & A
11
09-01-2005 01:16 AM
kaama377
Scarab
16
05-03-2005 01:11 PM
Maguyvah
Superboat
16
04-24-2005 10:04 PM
DarkHorseRacer
General Q & A
0
06-16-2004 04:19 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 07:22 AM.


Copyright 2011 OffShoreOnly. All rights reserved.