454 manifold suggestions

Reply Subscribe

Thread Tools

01-28-2005 | 08:56 PM

#21

Payton

Charter Member #927

Joined: Jan 2001

Posts: 4,834

Likes: 2

From: IN

Re: 454 manifold suggestions

There is a thread here in the tech section about doing oval/rectangle port setup.

01-29-2005 | 07:42 PM

#22

Rookie

Registered

Joined: Jan 2003

Posts: 6,019

Likes: 1,521

From: Grand Rapids, MI

Re: 454 manifold suggestions

Thanks Payton.

01-30-2005 | 06:35 AM

#23

open87

Registered

Joined: Feb 2003

Posts: 6,192

Likes: 318

From: Lafayette,La

Re: 454 manifold suggestions

Quote:

Originally Posted by Panther

I've seen good results with the Merc Daul Plane Intake Manifold with a spacer. With the Cubic inches you are running and the RPM range you've indicated I really don't feel you need a single plane intake. Also, the dual plane intake builds a little more torque down low where you need it. In some cases, I've even seen some HP 500 motors make more power with the dual plane. A good friend is running the merc dual plane on his 540's and the motor makes lots of torque and you don't need to rev the piss out of it, the dyno numbers proved it.

how much cam in that 540 ?

01-30-2005 | 12:41 PM

#24

Panther

Frank's Marine Service

Joined: Sep 2002

Posts: 11,959

Likes: 142

From: Elkton, MD

Re: 454 manifold suggestions

Quote:

Originally Posted by open72

how much cam in that 540 ?

Nothing spectacular, I would have to ask the owner. I'm guessing it was somewhere around .550 - .590 lift.

Last edited by Panther; 01-30-2005 at 12:43 PM.

01-30-2005 | 11:03 PM

#25

open87

Registered

Joined: Feb 2003

Posts: 6,192

Likes: 318

From: Lafayette,La

Re: 454 manifold suggestions

i am using the same intake ,with a 2 inch spacer with 610/587 540 ci 9/4/1 comp and canfield 310 heads. should make real good tourqe and not have to rev it out. i will post dyno #'s after it's done.

01-31-2005 | 08:56 AM

#26

Panther

Frank's Marine Service

Joined: Sep 2002

Posts: 11,959

Likes: 142

From: Elkton, MD

Re: 454 manifold suggestions

Quote:

Originally Posted by open72

i am using the same intake ,with a 2 inch spacer with 610/587 540 ci 9/4/1 comp and canfield 310 heads. should make real good tourqe and not have to rev it out. i will post dyno #'s after it's done.

Sounds similiar to what my buddy has, the difference is he had GM heads. He definetely could have used a better set of heads and in my opinion the motors would have perked right up! As it is the motor made just over 600 HP but the torque numbers were much higher. The motors are in a 40 ft. tripple engine hustler and the boat runs upper 90's, and can cruise at 65-70 mph all day long, and 50 mph at 3000 rpms.