Like Tree0Likes

454/330 upgrade questions.

Reply
Old 05-23-2011, 12:27 AM
  #1
Registered
Thread Starter
 
Join Date: Jun 2007
Location: Wilmington ,North Carolina
My Boats: 1994 Mariah 22' 454 MAG MPI bravo 1
Posts: 72
Default 454/330 upgrade questions.

I know there are many variations of this topis on here and after many seraches I decieded to post and see some opinions. I am currently running a 454/330 but and building a 454 with the following parts. My question is will I be able to break 380-400hp?

-Heads are a fresh set of 3999241( LS-5 365hp ovals with a freash valve job).
-Lunati 276/276 cam ( 221/[email protected], 515/515)
-Keith Black .030 hyper pistons
-stock rods and crank.
-carb is a 750 quad
-GLM 4" manifolds and risers

Mecrusiser said they dynoed a 330 with the lunati cam and made 380bhp.

Haven't decieded on a manifold. Any pointers or suggestions would be great, I am not looking for massive power, just good power and reliability.
seansmp8 is offline  
Reply With Quote
Old 05-23-2011, 08:56 AM
  #2
Registered
 
Join Date: Feb 2011
Location: Birch Run, MI
My Boats: Formula 336 w/HP 450's, BW 22 Outrage, 300 'Rude
Posts: 402
Default

That cam is pretty small, it has less duration than a 454 Magnum cam.

I have had good results in the past using roller rocker arms on 454's, they lower your oil temps and free up a couple hp.

You didnt mention an intake manifold, but I would use a Performer RPM or air gap manifold.

Bump up compression to around 9.0 to 1 if you havent already.

With those pistons and rotating assembly 400hp will be your max, I wouldnt go over that
rexcramer1 is offline  
Reply With Quote
Old 05-23-2011, 03:45 PM
  #3
Registered
Thread Starter
 
Join Date: Jun 2007
Location: Wilmington ,North Carolina
My Boats: 1994 Mariah 22' 454 MAG MPI bravo 1
Posts: 72
Default

what would be a good cam to match those heads and not need a big carb? I looked at the comp grinds,
seansmp8 is offline  
Reply With Quote
Old 05-23-2011, 09:59 PM
  #4
Registered
 
Join Date: Feb 2011
Location: Birch Run, MI
My Boats: Formula 336 w/HP 450's, BW 22 Outrage, 300 'Rude
Posts: 402
Default

I would go just a little hotter, something around 228/236 duration at .050 and just about .510-.520 lift, no more than that. Be sure to get an LSA of at least 114.

If you have a few extra bucks to have the heads opened up just a little that would help also.

I was looking at those manifolds on their website and they look like stock replacements, not performance manifolds. Gonna be hard to hit an honest 400 with stock manifolds. With performance manifolds 410-420 may be possible
rexcramer1 is offline  
Reply With Quote
Old 05-23-2011, 11:36 PM
  #5
Registered
Thread Starter
 
Join Date: Jun 2007
Location: Wilmington ,North Carolina
My Boats: 1994 Mariah 22' 454 MAG MPI bravo 1
Posts: 72
Default

Thanks Rex. That cam sounds pretty nice. The GLM site said they made 12 hp over mercruiser manifoldes. They have shaped chambers that they say help the gases out better. The heads were given to me by my uncle and they are the same as the 049 heads (113cc open) and they just had a 3 angle valve job.

Does anyone have any proven Cam numbers with the setup?
seansmp8 is offline  
Reply With Quote
Old 05-24-2011, 10:06 PM
  #6
Registered
Thread Starter
 
Join Date: Jun 2007
Location: Wilmington ,North Carolina
My Boats: 1994 Mariah 22' 454 MAG MPI bravo 1
Posts: 72
Default

lunati make a vodoo with a 219/[email protected] .050 530/540, and a 224/[email protected] .050 and 527/553. would any of these work well with the 049 heads?
seansmp8 is offline  
Reply With Quote
Reply



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 11:18 PM.


Copyright 2011 OffShoreOnly. All rights reserved.