Like Tree0Likes

454-420: are they full roller?

Reply
Old 08-28-2006, 01:55 PM
  #1
Registered
Thread Starter
 
jeff32's Avatar
 
Join Date: Jun 2004
Location: St-Hyacinthe, quebec, canada
My Boats: 2000 triple 500 efi Sonic 45
Posts: 6,246
Default 454-420: are they full roller?

I opened mine and they are regular lifters but roller rockers.
I thought they were full roller!

So what is your guess ? How were they built out from factory?
Roller lifter only ?
Roller rockers only ?
Roller all the way?

Thanks!
jeff32 is offline  
Reply With Quote
Old 08-28-2006, 01:58 PM
  #2
Registered
 
Sean's Avatar
 
Join Date: Oct 2000
Location: Darien, CT
My Boats: Donzi Sweet 16
Posts: 3,161
Default Re: 454-420: are they full roller?

mine had the crane gold...
Sean is offline  
Reply With Quote
Old 08-28-2006, 01:58 PM
  #3
Registered
 
Join Date: Jul 2001
Location: Clearwater Florida
Posts: 193
Default Re: 454-420: are they full roller?

Flat Tappet Hydraulic Cam, Gold Crane Roller Rockers
302SR1 is offline  
Reply With Quote
Old 08-28-2006, 02:05 PM
  #4
10x
10x
VIP Member
 
10x's Avatar
 
Join Date: Dec 2003
Location: La Grange Ill
My Boats: 1989 10 mtr Fountain
Posts: 4,799
Default Re: 454-420: are they full roller?

Quote:
Originally Posted by 302SR1
Flat Tappet Hydraulic Cam, Gold Crane Roller Rockers
EXACTLY.
__________________
Fountain powerboats rule "The Preacher"
Chicago Powerboat Club Director
[email protected]
www.chicagopowerboat.com
10x is offline  
Reply With Quote
Old 08-28-2006, 02:29 PM
  #5
Registered
Thread Starter
 
jeff32's Avatar
 
Join Date: Jun 2004
Location: St-Hyacinthe, quebec, canada
My Boats: 2000 triple 500 efi Sonic 45
Posts: 6,246
Default Re: 454-420: are they full roller?

that's what I have too. So they really are 420's, Thanks guys!
jeff32 is offline  
Reply With Quote
Old 08-28-2006, 02:51 PM
  #6
Geronimo36
Gold Member
 
Panther's Avatar
 
Join Date: Sep 2002
Location: Elkton, MD
My Boats: 36' Apache Warrior / 22' Apache Scout
Posts: 11,838
Default Re: 454-420: are they full roller?

I always thought those 420's were good motors! good foundation to build some power on!
Panther is offline  
Reply With Quote
Old 08-28-2006, 02:59 PM
  #7
Registered
 
Join Date: Jul 2001
Location: Clearwater Florida
Posts: 193
Default Re: 454-420: are they full roller?

They are a good foundation. 990 or 188 casting square port heads. Steel crank, 7/16 rods, and 4 bolt mains.


Cam change, Intake and Carb change, Good exhaust, They will make around 500HP
302SR1 is offline  
Reply With Quote
Old 08-28-2006, 03:00 PM
  #8
Registered
Thread Starter
 
jeff32's Avatar
 
Join Date: Jun 2004
Location: St-Hyacinthe, quebec, canada
My Boats: 2000 triple 500 efi Sonic 45
Posts: 6,246
Default Re: 454-420: are they full roller?

apparently they are...my engine builder will make it 500-520 with only blueprint and full hydraulique cam. they then would be ready for step 2 somedays...blowers.
jeff32 is offline  
Reply With Quote
Old 08-28-2006, 03:18 PM
  #9
Registered
 
Join Date: Mar 2004
Posts: 205
Default Re: 454-420: are they full roller?

I built a 454 420 clone but I bored mine over .030 and balanced and used large oval port head with big valves that are ported and flowed, an rpm air-gap intake. My machine shop told around 475-500hp. I know it sure runs nice and strong.
k24u is offline  
Reply With Quote
Old 08-28-2006, 04:02 PM
  #10
Registered
 
dean51267's Avatar
 
Join Date: Jan 2005
Location: Paducah, KY
My Boats: 93 Profile, 31', twins
Posts: 4,601
Default Re: 454-420: are they full roller?

Quote:
Originally Posted by jeff32
I opened mine and they are regular lifters but roller rockers.
I thought they were full roller!

So what is your guess ? How were they built out from factory?
Roller lifter only ?
Roller rockers only ?
Roller all the way?

Thanks!

I opened one and it was roller lifter, but standard rockers, mild dome pistons, and 502 marine heads. ummm, something sounds strange....
dean51267 is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
k24u
General Q & A
4
03-05-2007 10:52 AM
MILD THUNDER
General Q & A
9
09-08-2005 08:36 PM
gripit
General Q & A
18
11-27-2004 04:05 PM
j winkelman
General Q & A
16
02-16-2004 04:03 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 03:26 PM.


Copyright 2011 OffShoreOnly. All rights reserved.