Go Back  Offshoreonly.com > Technical > General Q & A
Msd distributes bushings? >

Msd distributes bushings?

Like Tree0Likes

Msd distributes bushings?

Reply

Old 07-13-2018, 05:02 PM
  #1
Registered
Thread Starter
 
Join Date: Jun 2018
Posts: 10
Default Msd distributor advance stop bushings

Can anyone tell me the sizes of the advance stop bushings on an msd distributor ? I canít tell what color it is because itís a little rusty. Also , what spark plugs would you use on a 454 with B&m 250ís? Got this old project boat almost ready,,,,

Last edited by Scscoripion; 07-14-2018 at 08:02 AM. Reason: Bad spelling
Scscoripion is offline  
Reply With Quote
Old 07-13-2018, 05:07 PM
  #2
Registered
Thread Starter
 
Join Date: Jun 2018
Posts: 10
Default

My bushings are .430
Scscoripion is offline  
Reply With Quote
Old 07-14-2018, 01:06 AM
  #3
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
My Boat: .......32............. ............Active Thunder....
Posts: 16,239
Default

Assuming BBC rect port heads, I would run AC MR41T plugs.
Griff is offline  
Reply With Quote
Old 07-14-2018, 07:59 AM
  #4
Registered
Thread Starter
 
Join Date: Jun 2018
Posts: 10
Default

Thanks for the reply, I will try them. Any idea on the distributor bushings? I took my msd apart yesterday,trying to figure out the timing curve.
Scscoripion is offline  
Reply With Quote
Old 07-14-2018, 08:06 AM
  #5
Registered
Thread Starter
 
Join Date: Jun 2018
Posts: 10
Default

Also, yes they are bbc rectangle heads, were mercury 400,s , now mabey 550 h.p.?
Scscoripion is offline  
Reply With Quote
Old 07-14-2018, 01:23 PM
  #6
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
My Boat: .......32............. ............Active Thunder....
Posts: 16,239
Default

The kit should have all the specs https://www.summitracing.com/parts/msd-8464
Griff is offline  
Reply With Quote
Old 07-14-2018, 10:20 PM
  #7
Registered
Thread Starter
 
Join Date: Jun 2018
Posts: 10
Default

Thank you Griff, Iím going to look at it, I checked my plugs, they are NGK # 7
Scscoripion is offline  
Reply With Quote
Old 07-14-2018, 11:59 PM
  #8
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
My Boat: .......32............. ............Active Thunder....
Posts: 16,239
Default

Originally Posted by Scscoripion View Post
Thank you Griff, Iím going to look at it, I checked my plugs, they are NGK # 7
Those are probably close. The NGK 7 is equivalent to and AC 42 heat range.and an NGK 8 is equivalent to an AC 41.
Stock NA Merc engines run an AC MR43T or NGK BR6FS. Merc 525SC/600SC run an AC MR41T
Griff is offline  
Reply With Quote
Old 07-15-2018, 08:53 AM
  #9
Platinum Member
Platinum Member
iTrader: (3)
 
TomFTM's Avatar
 
Join Date: Dec 2000
Location: Glen Cove ,NY 11542
My Boat: 37 Outerlimits,42 Searay,17 Boston Whaler
Posts: 2,083
Default

I will let u know tomorrow about the bushing sizes, working on msd distubuter tomorrow and I have all the bushings.
TomFTM is offline  
Reply With Quote
Old 07-15-2018, 08:45 PM
  #10
Registered
Thread Starter
 
Join Date: Jun 2018
Posts: 10
Default

Thatís good ! Do you have any idea what curve I should run with 8.6 compression,B& m 250ís , 1000 cfm Hollyís, stainless marine headers, 24 pitch 4 blade Cleavers?
Scscoripion is offline  
Reply With Quote

OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser