We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
Ron Miller
Pro
Pro
Posts: 360
Joined: Tue Jun 21, 2005 1:41 pm
Location:

Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by Ron Miller » Thu Nov 28, 2019 2:16 pm

Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram. Anybody out their use one of these intakes? I'm looking for one cheap. Gonna try one on a low budget 400 build. This is a two-piece intake. The picture below is just the bottom. I would like to buy just the bottom if possible.



Thanks for looking and any info you can provide, =D>
Ron Miller

dannobee
HotPass
HotPass
Posts: 34
Joined: Mon Nov 04, 2019 9:01 pm
Location:

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by dannobee » Thu Nov 28, 2019 2:37 pm

It's for the inboard ski boats. The MerCruiser Black Scorpion MX 6.2L MPI. Lower intake is part number 807352A12. Short of finding one on ebay, call Edelbrock and see if they have any more lying around. MerCruiser, afaik, quit that project years ago. Dunno if any of that helps or not.

midnightbluS10
Expert
Expert
Posts: 770
Joined: Sun Oct 20, 2013 8:41 am
Location: Shreveport, LA

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by midnightbluS10 » Thu Nov 28, 2019 2:45 pm

The intake looks to be available online new for anywhere between $1400 & $1800. I think I even saw them on Amazon.

https://www.marineengine.com/parts/merc ... -fuel-rail

Edit: Yes, even on Amazon

JC -

SUPPORT THE RPM ACT :!:

https://www.sema.org/rpm-bill-summary

ProPower engines
Guru
Guru
Posts: 7690
Joined: Sun Jan 21, 2007 1:16 pm
Location: Victoria BC Canada

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by ProPower engines » Thu Nov 28, 2019 5:31 pm

Ron Miller wrote:
Thu Nov 28, 2019 2:16 pm
Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram. Anybody out their use one of these intakes? I'm looking for one cheap. Gonna try one on a low budget 400 build. This is a two-piece intake. The picture below is just the bottom. I would like to buy just the bottom if possible.



Thanks for looking and any info you can provide, =D>
Seen them quite a bi up here. They are like the intake on the 454/502 MPI engines by design just for a sm. blk.
They never seemed to give issues other then the injectors failing from time to time.
The cost from Mercruiser is out of this world but I am sure you can find an automotive equivelent without the bronze inserts cast in the water jacket areas. They were made by Edelbrock for Mercrusier so that may be an option.
The genuine marine intakes seem to go for about$1000+ up here when they come up.

Happy hunting :D
Real Race Cars Don't Have Doors

Ron Miller
Pro
Pro
Posts: 360
Joined: Tue Jun 21, 2005 1:41 pm
Location:

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by Ron Miller » Thu Nov 28, 2019 6:50 pm

Guys, Thanks for the replies. About 10 months ago I had a chance to buy 2 intakes, just the bottoms, for $250. The seller had no clue what they were and the pictures he had posted were poor. I wish I would have bought them. The search is still on. \:D/ My planes for the intake will be carbs and making a top for two carbs.

Thanks Again,
Ron Miller

Joe-71
HotPass
HotPass
Posts: 114
Joined: Sat Apr 08, 2017 5:46 pm
Location:

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by Joe-71 » Sun Dec 01, 2019 10:53 pm

I flow tested one of those about 4 years ago, and it flowed in the 430cfm range, with a couple of the ports needing a radius on the ends where the cover fits close to the port. Otherwise it is easy to work on. We actually dyno tested it after balancing all the runners to ~450cfm, and decided to epoxy them to lower the flow, and increase the velocity. Lots of work, but did help with torque and hp. Joe-JDC
Joe-JDC

Ron Miller
Pro
Pro
Posts: 360
Joined: Tue Jun 21, 2005 1:41 pm
Location:

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by Ron Miller » Mon Dec 02, 2019 4:07 pm

Joe-71 wrote:
Sun Dec 01, 2019 10:53 pm
I flow tested one of those about 4 years ago, and it flowed in the 430cfm range, with a couple of the ports needing a radius on the ends where the cover fits close to the port. Otherwise it is easy to work on. We actually dyno tested it after balancing all the runners to ~450cfm, and decided to epoxy them to lower the flow, and increase the velocity. Lots of work, but did help with torque and hp. Joe-JDC
Joe-71,
Thanks for the reply and info. What was the cubic-inch, and what heads were used? What was the before and after porting-work numbers? Do you have any picture examples? I'm looking for an intake cheap?

Thanks Again, =D>
Ron Miller

F-BIRD'88
Guru
Guru
Posts: 7295
Joined: Tue Mar 27, 2007 6:56 pm
Location: Ontario, Canada

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by F-BIRD'88 » Tue Dec 03, 2019 1:39 am

There is also a earlier pre 1996 pre vortec head version of this mercruiser intake. It fits the 083-217 350 heads (TPI)

These Merc Marine intakes rarely go cheap
A better cheap path to a tunnel ram for vortec heads for carbs might be the SpeedMaster79 Vortec EFI intake (lower).
It is a Holley/Weiand Stealth Ram clone.
The sbc weiand hi ram 2x4; carb plenum top fits it..

Another path where big big airflow big horsepower power and high rpm is planned (racing engine) is to modify/adapt a Edelbrock Victor Ram ....Pro Ram tunnel ram to fit and match the raised runner vortec/fastburn intake ports and bolt pattern.

Edelbrock should make a vortec/Etec /Fastburn head port version of the eddy Street Tunnel Ram. Tr1yx.

Ron Miller
Pro
Pro
Posts: 360
Joined: Tue Jun 21, 2005 1:41 pm
Location:

Re: Looking for info on this intake SBC 377 Vortec Mercruiser tunnel ram

Post by Ron Miller » Wed Dec 04, 2019 4:38 pm

F-BIRD'88 wrote:
Tue Dec 03, 2019 1:39 am
There is also a earlier pre 1996 pre vortec head version of this mercruiser intake. It fits the 083-217 350 heads (TPI)

These Merc Marine intakes rarely go cheap
A better cheap path to a tunnel ram for vortec heads for carbs might be the SpeedMaster79 Vortec EFI intake (lower).
It is a Holley/Weiand Stealth Ram clone.
The sbc weiand hi ram 2x4; carb plenum top fits it..

Another path where big big airflow big horsepower power and high rpm is planned (racing engine) is to modify/adapt a Edelbrock Victor Ram ....Pro Ram tunnel ram to fit and match the raised runner vortec/fastburn intake ports and bolt pattern.

Edelbrock should make a vortec/Etec /Fastburn head port version of the eddy Street Tunnel Ram. Tr1yx.
F-BIRD"88",
Thanks for the reply and info. I looked at the SM EFI intake. I would like to find one of those Merc T/R first. If I don't have any luck finding one, that SM could be an option.

Thanks Again, =D>
Ron Miller

Post Reply