User Tag List
Thanks: 0
Results 1 to 6 of 6
Thread: 3 litre merc experts
-
10-20-2017, 09:47 PM #1
3 litre merc experts
New to modifying the 3 litre block. I have a brand new 225 optimax block. Would it make a good candidate for a performance engine? I believe these blocks have an exhaust chest like the 300x block. Advise please. Popey
Popey
-
10-20-2017, 10:20 PM #2
Nope. The X motor has a less than ****ty chest than the Podunk motors. The opti blocks work fine, just some intricate cutting is involved.
Last edited by Capt.Insane-o; 10-21-2017 at 07:54 AM.
-
10-21-2017, 06:43 PM #35000 RPM
- Join Date
- Jan 2002
- Location
- north myrle beach
- Posts
- 344
- Thanks (Given)
- 5
- Thanks (Received)
- 10
- Likes (Given)
- 6
- Likes (Received)
- 68
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Get yourself a 250xb. It doesn't have exhaust relief slots like the 225 efi and the 300 pro max block.
-
10-21-2017, 06:59 PM #4
That's a good block to start with . Late model sequential Motorola EFI electrics bolt right on . As do EFI heads and 300x reed plate .
The ports are small , which to me is a plus . This way you can cut them how you want . ( I would rather have material in my way , than look for it and not be there)
Only an X has the larger , less restrictive log. All others have the small passage . But that doesn't matter , it can be made to perform .
-
Capt.Insane-o liked this post
-
10-22-2017, 04:53 PM #5
I have always considered the 3 litre engine had potential as a low stress stump puller but never had much to do with them until just recently. Always worked on high stress 2.5 f1s. I will use this 225 opti block? I have no other parts yet so I can source whatever parts are more desirable to use. If the exhaust is more restrictive than the x block does that dictate not to copy the x porting. I have a customers x powerhead down at the moment (broken crank through number 6 crankpin) so I could get port sizes and timing if required. Thanks for the replies. Popey
Popey
-
10-23-2017, 01:49 AM #65000 RPM
- Join Date
- Mar 2006
- Location
- auckland new zealand
- Posts
- 655
- Thanks (Given)
- 3
- Thanks (Received)
- 9
- Likes (Given)
- 6
- Likes (Received)
- 13
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Popey welcome to the 3.0l merc. the block you have is great to start with like chaz and the others have said. I have modded a few and if you want to have a chat some time. we have meet b4 at race meets via luke sharp and malc.
Similar Threads
-
Need help from you Merc experts.
By Dominator Scott in forum Technical DiscussionReplies: 8Last Post: 08-30-2015, 08:34 PM -
Merc experts: need some info
By brpdk945 in forum Technical DiscussionReplies: 9Last Post: 11-20-2007, 02:01 PM -
calling on 2.5 Merc Experts!!!!
By mousamlakespeedster in forum Technical DiscussionReplies: 7Last Post: 07-17-2006, 04:18 PM -
Question for Merc EFI experts
By Matt in forum Technical DiscussionReplies: 12Last Post: 05-26-2001, 12:37 AM