Vortec manifold.

I am trying to find a 2bbl manifold for my 96-00 truck 305 vortec heads.
Only 2bbl manifold I could find was the Victor Jr. Vortec but it makes power way too high up in the rpms.
Mercruiser must have used one didn't they?
I have seen 350 mercruisers with 2bbls so I don't want to purchase a 4 bbl for my 305. I don't really need more power, I just want better efficiency/economy.
If I use an adapter plate so say a performer intake could accept my 2bbl, what should I be aware of?

Re: Vortec manifold.

Michigan Motors seems to be good at finding cast iron Intake Manifolds,.......

Have you tried Them,..??.....

Re: Vortec manifold.

Thanks.
I sent them an email.
Some where I read that there were 3 or 4 choices.
I have managed to find part# 860100A 1, but it lists for $ 400
Anyone have a marine wrecker close by?

Re: Vortec manifold.

I'm in North Van, just a thought but I read that 4 bbl carbs are more fuel efficient then 2 barrels because the main barrels are smaller, it's just when you punch the throttle that it can suck the fuel. Just my cdn 2 cents

Re: Vortec manifold.

Looking around I don't believe Mercruiser and probably also Chevy ever made a cast iron 2 Vortec manifold. Your best and cheapest bet is a aftermarket dual plane aluminum square bore manifold and adapter.
Aftermarket cast iron vortec manidolds are available but they ain't cheap.

http://www.castheads.com/marine_vortec_2_4_barrel.php

This is from the above web site.

5. What is the best cast iron intake to run on Vortec heads?

The best intake is our Marine High-Rise intake, both 2 and 4 barrel styles are available. These intakes are not manufactured by Chevrolet.

Chevrolet makes a “Pancake” 4 barrel Q-Jet intake, part# 14097499. This intake was designed for a low rpm engine used on generators. The performance of this intake will be 15 to 20 horsepower below a standard Q-Jet intake. For this reason, we do not recommend the “Pancake” intake.

Re: Vortec manifold.

there is a 2 barrell vortec on ebay now.auction number is 170145701523 .carb and manifold.2000 v-8

Re: Vortec manifold.

4 barrels are for effiecency... not so much for power....
....
now quads (dual 2's) or 6 packs (trip 2's) are where the real power is..... (but not economy)
orrrr... fuel infection.