85Kauai

  • Karma: +0/-0
BBC Intake Manifold Question
« on: April 04, 2013, 08:01:32 PM »
Thinking about swapping out my cast iron intake to aftermarket. Any recommendations on which one I should try? Air Gap was the first recommendation.  454 basicaly stock. Manifold needs to be low or medium rise due to engine cover clearence.
And does anyone have one laying around?
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
1985  19' Sleekcraft

GT Jets

  • Karma: +192/-0
Re: BBC Intake Manifold Question
« Reply #1 on: April 04, 2013, 08:43:45 PM »
If it is stock and going to stay that way, an Air Gap would work pretty well, but low rise it is not.

A Performer RPM would be slightly shorter and a pretty good choice IMHO.

If you are going to be doing a cam change, carburetor swap, head work etc... I would recommend doing more research in what direction you're going to go.

  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

SoCalPSD

  • Karma: +4/-0
Re: BBC Intake Manifold Question
« Reply #2 on: April 04, 2013, 11:07:55 PM »
Pretty sure I have a performer rpm manifold on my bbc resting in my garage
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

In my best "grandad" voice with a cigarette hanging out of my mouth....  "if a day goes by and you learn nothing, I hope like hell you got a lot of sleep".... :thumbup:

obnoxious001

  • Karma: +4/-1
Re: BBC Intake Manifold Question
« Reply #3 on: April 07, 2013, 08:05:17 PM »
Thinking about swapping out my cast iron intake to aftermarket. Any recommendations on which one I should try? Air Gap was the first recommendation.  454 basicaly stock. Manifold needs to be low or medium rise due to engine cover clearence.
And does anyone have one laying around?

Do you have oval port or rectangular port heads?  You probably should buy one that matches your heads.

Airgap is probably a good choice, but even a GM factory aluminum intake, or a Performer RPM or regular Performer,, or the imported copies would work.  Without other modifications to the engine, it's likely that you won't see much difference, if any.  I have this GM rectangular port marine intake, with bronze lined water jackets for $150

  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

5oclocksomewhere

  • Karma: +11/-0
Re: BBC Intake Manifold Question
« Reply #4 on: April 07, 2013, 08:49:31 PM »
What's the difference between this aluminum (marine) and a regular aluminum rectangular port manifold off a street vehicle?


Sent from my iPhone using SoCalJetBoats mobile app
  • Boat #1: 07 21" Eliminator Eagle XP
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
It's always 5:00pm at the river

GT Jets

  • Karma: +192/-0
Re: BBC Intake Manifold Question
« Reply #5 on: April 07, 2013, 09:22:10 PM »
What's the difference between this aluminum (marine) and a regular aluminum rectangular port manifold off a street vehicle?


Sent from my iPhone using SoCalJetBoats mobile app

A true marine intake manifold has brass inserts on the four corners and in the area of the thermostat, water never touches aluminum.

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

5oclocksomewhere

  • Karma: +11/-0
Re: BBC Intake Manifold Question
« Reply #6 on: April 07, 2013, 09:23:46 PM »
Can you still use a street aluminum manifold?


Sent from my iPhone using SoCalJetBoats mobile app
  • Boat #1: 07 21" Eliminator Eagle XP
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
It's always 5:00pm at the river

GT Jets

  • Karma: +192/-0
Re: BBC Intake Manifold Question
« Reply #7 on: April 07, 2013, 09:27:56 PM »
Can you still use a street aluminum manifold?


Sent from my iPhone using SoCalJetBoats mobile app


I hope so, I've been doing for two decades..... :sly:

It really only applies to boats that spend a lot of time in the water. They don't seem to corrode too badly on the weekend warriors.

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

85Kauai

  • Karma: +0/-0
Re: BBC Intake Manifold Question
« Reply #8 on: April 07, 2013, 10:44:59 PM »
Might have a RPM  lined up for the standard SCJB price. :-))
Just have to be patient .
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
1985  19' Sleekcraft

Second Chance

  • Karma: +8/-0
Re: BBC Intake Manifold Question
« Reply #9 on: April 08, 2013, 09:28:28 AM »
Hey Gil, if that doesn't work out, HD has a Chevrolet
winters casting aluminum hi rise he's willing to part with.
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

85Kauai

  • Karma: +0/-0
Re: BBC Intake Manifold Question
« Reply #10 on: April 08, 2013, 11:04:48 AM »
Thanks Danny
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
1985  19' Sleekcraft

 


SMFPacks CMS 1.0.3 © 2021