Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafolds

John Leyden

John Leyden

Member
Jul 7, 2017
94
New Port Harbor California on my Mooring
Boat Info
Sea Ray 00' 340DA (Anna Mei II)
Engines
Was 310 HP MPI --> Twin full 454 Mer-Cruiser 400 hp "Gas Aspirated" Less to worry! Works for me!
I just Pulled Both BBC 310hp for Complete Rebuild and there Now in work At L&R in Santa fe Springs Ca., Reason in being Both Engines took a Salt water Bath at the Dock Rear end only!, So Having the 454's worked along Added Gear Drives and upper Roller and Balancing both the Engines, The big reason is that Getting rid of these MPI Fuel Setup because they have both gone south!
AND so I'm Replacing it with set of the 1410 Carbs with a set of GM 333841 split bore Manifolds, By passing that $ MPI System and just using 7 wires Digital to and from to Control Helm Panel ---- And Thoughts on this will most be Helpful if anyone out there has ever done this before!
Another problem I am now is the re-Configuring the AC and DC Engine room? Any thoughts?
Or What can I do to make it as simple as possible? As I now go forward!
 
Last edited:
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

Are you looking for more HP, or Have you had issues with the MPI setup?
 
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

I don't see any upside to going the carb direction. You don't want a Victor Jr. manifold for this application. Marine engines need grunt down low, you want a dual plane manifold (Performer, maybe Performer RPM). Marine engines don't wind high enough to justify a single plane manifold, and will be soggy on the bottom end.
 
Re: Thinking of Dumping the MPI as there way to far gone and rusted up! for a set of Edelbrock 1410 Carb's Matching With a set of GM 333841 Split Bore Manifolds.

Was just trying to keep it Simple!
 
Last edited:
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

Your right!
I'm now going with My Marine GM 333841 Manifolds, But have small problem Cant find the Missing "Phenolic adapter" on one Manifold I see a # SAE (2A5-GF30) Has rubber Rings Groves on both Sides and Bolts to the Manifold--- Then the Carbs bolt on!

Any one know where to find or get this Part?
 
Last edited:
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

Your right! That 5000 RMP to 8000 RPM Wouldn't work at all!
I'm now going with My Marine GM 333841 Manifolds, But have small problem Cant find the Missing "Phenolic adapter Blocks" that are used between Manifold and Carbs. I see a # SAE (2A5-GF30) Has rubber Rings Groves on both Sides for O-Rings and Bolts to the Manifold--- Then the 1410 New Carbs bolt on!

Any one know where to find or get this Part?
 
Last edited:
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

Jegs or summit, it can be generic.
 
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

You'll likely increase fuel consumption with no performance gains.
 
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

If it aint broke...... Break it!
 
Just had both of my motors rebuilt to factory spec and make 335 hp @4500 rpm and 475 lb tourqe. @3100 on the dyno also running efi . spoke extensively about increasing hp and the counsel was not to add hp to efi setup because of ecm and mapping ,but if going carb must go at least 100 hp to see a real difference .the bigger problem is adding to much cam lift causes water reversion be careful changing these motor setups


Sent from my iPhone using Tapatalk
 
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

joeyleggz said:
Just had both of my motors rebuilt to factory spec and make 335 hp @4500 rpm and 475 lb tourqe. @3100 on the dyno also running efi . spoke extensively about increasing hp and the counsel was not to add hp to efi setup because of ecm and mapping ,but if going carb must go at least 100 hp to see a real difference .the bigger problem is adding to much cam lift causes water reversion be careful changing these motor setups
Click to expand...

Just curious, how do you put a boat on a dyno?
 
4c51f666f538ce36e3d99b7cd4b3202d.jpg
The engine is on the dyno not the boat


Sent from my iPhone using Tapatalk
 
Thinking of Dumping the MPI for Those Edelbrock 1410 Carb's and a set of Matching Split Bore GM 333841 Manifolds.

Your Right I'm Now been thinking that I really needed to dump those Original MPI Fuel injection System as there so very Expansive to replace!
But was trying to keep it simple and, As for now I have all the parts to go with the 1410 and the Split bore GM manifolds!
And Bunch of Franklins have gone out so far! And City Hall here at Home is not Happy at all!
All ever wanted was just a little bit Sunshine!!!!!!!!
 
Last edited:
Re: Thinking of Dumping the MPI for Edelbrock 1410 Carb's and Matching Sq Bore Manafo

I did Find the Part ! MerCrouiser P/N 41363
 
You must log in or register to reply here.

Forum statistics

Threads
113,124
Messages
1,426,659
Members
61,037
Latest member
wojozobl
Back
Top