Go Back  Offshoreonly.com > Technical > General Q & A
305 cam selection etc. >

305 cam selection etc.

Notices

305 cam selection etc.

Old 05-20-2009, 08:39 AM
  #1  
Registered
Thread Starter
 
Join Date: May 2009
Location: Tønsberg, Norway
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Default 305 cam selection etc.

Hi

I am rebuilding my 305 marine engine. I have 416 heads (that I will pocket port) and valve relief pistons. The CR is approx 9.2. I have stainless marine exhaust and a weiand 8004 intake.

I wonder which cam I should choose for this engine. I have thought about comp cams xm256h...

I want as much power as I can get from the old 305 (I live in Norway, so 350's are rather expensive, so for the moment I will stick with the 305). This is an inboard/outboard installation with a VP outdrive. This outdrive has cone shift, so I will not mess up my lower unit if I have to have a bit higher idle speed.

Another thing: is the 8004 intake any good in my app, or should I get another one?

Thanks,
Stian
stian is offline  
Old 05-21-2009, 03:45 PM
  #2  
Registered
Thread Starter
 
Join Date: May 2009
Location: Tønsberg, Norway
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Default

Anyone that can help me out there? Would appreciate it
stian is offline  
Old 05-21-2009, 06:55 PM
  #3  
Registered
 
Join Date: Jan 2009
Location: Omaha, nebraska
Posts: 1,007
Received 2 Likes on 2 Posts
Default

i hate to say it but you are not gonna ever be happy with a 305 in my opinion you will never be happy with it. i have tried 305s in cars and theyjust dont have the power. a 350 would be a good solution but a 350 with a 383 kit would not cost too much and build a ton of power. like i said its my opinion
regalman4925 is offline  
Old 05-21-2009, 07:12 PM
  #4  
Registered
 
Join Date: Oct 2005
Location: Millstadt, IL
Posts: 1,888
Received 18 Likes on 9 Posts
Default

Originally Posted by regalman4925
i hate to say it but you are not gonna ever be happy with a 305 in my opinion you will never be happy with it. i have tried 305s in cars and theyjust dont have the power. a 350 would be a good solution but a 350 with a 383 kit would not cost too much and build a ton of power. like i said its my opinion
Ditto, 383 stroker. All of your accessories should work. If you are going with aftermaket cam you will need new exhaust to avoid reversion.
jeffswav is offline  
Old 05-21-2009, 07:42 PM
  #5  
Registered
 
Join Date: Jan 2009
Location: Omaha, nebraska
Posts: 1,007
Received 2 Likes on 2 Posts
Default

thin he has stainless exhust right? and that intake will help also. i think a budget 383 would not cost too much
regalman4925 is offline  
Old 05-22-2009, 05:28 PM
  #6  
Registered
Thread Starter
 
Join Date: May 2009
Location: Tønsberg, Norway
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Default

Yes, if I lived in the states a 383 would be what I would have gone for. Here it is far between 350 blocks, and the import taxes are very high (I think it is like $20 per horse, plus 25% sales tax....) plus the fright from the states cost almost as much as the engine, so I am going to run the 305, at least this season. Just so you can get a picture, a new standard mercruiser cost about $40-50K here.

I hope that I will be able to get hold of a decent used 350 block and stroke it before next season.

Anyways I am stuck with the 305 for now, and I want to do the best out of it.
stian is offline  
Old 05-24-2009, 10:57 AM
  #7  
Registered
iTrader: (1)
 
Join Date: Aug 2004
Location: Whitefish Chain - Crosslake, MN
Posts: 430
Received 3 Likes on 3 Posts
Default

Gotta love socialism. Government "needs" to keep you in line for your own good.

Depending on the year, you could probably upgrade to a roller for fairly cheap. I have a XE264HR sitting around that I would like to get rid of. Same duration at 050 as the one you mentioned. It is ground on a 110, but at that duration reversion shouldn't be an issue.
ACrooks69 is offline  
Old 05-24-2009, 11:00 AM
  #8  
artselectricinc.com
Platinum Member
 
Steve H's Avatar
 
Join Date: Dec 2000
Location: Longview, WA, USA
Posts: 669
Received 7 Likes on 5 Posts
Default

Originally Posted by stian
Here it is far between 350 blocks, and the import taxes are very high (I think it is like $20 per horse, plus 25% sales tax....) plus the fright from the states cost almost as much as the engine, so I am going to run the 305, at least this season. Just so you can get a picture, a new standard mercruiser cost about $40-50K here.

Obama's vision for America

Last edited by Steve H; 05-24-2009 at 11:04 AM.
Steve H is offline  
Old 05-25-2009, 08:13 AM
  #9  
Registered
Thread Starter
 
Join Date: May 2009
Location: Tønsberg, Norway
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Default

It is a 2 pc. block, so I guess I need a lot of stuff to upgrade it to a roller. Do you just have the cam, or the whole retrofit package?
stian is offline  
Old 05-25-2009, 09:21 AM
  #10  
Registered
iTrader: (1)
 
Join Date: Aug 2004
Location: Whitefish Chain - Crosslake, MN
Posts: 430
Received 3 Likes on 3 Posts
Default

I just have the cam, but it is for an 87 and up OEM roller block. You do not have the provision for the cam retainer and I don't know what would be involved in making it work in an older block.
ACrooks69 is offline  

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.