Offshoreonly.com - Anyone ever try the BBC trick flow intake manifold? 540-565 ci

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Quote:

Originally Posted by Baja Rooster (Post 4683658)

With all of these spacers it seems like we're just getting back to the venerable tunnel ram. ;)

You can add 4" of spacers or more and it's still not a Tunnel Ram.

Just like adding spacers to a dual plane is not making a single plane.

Making something share 1 characteristic does make something become another.

https://rehermorrison.com/product/an...ersion-plates/
These made an extra 8-12 horsepower on my 540s.

Quote:

Originally Posted by Baja Rooster (Post 4683658)

With all of these spacers it seems like we're just getting back to the venerable tunnel ram. ;)

Most these bigger motors if you add a tunnel ram to dyno sim it shows signifigant gains with virtually no torque loss. I have never built a motor with a tunnel ram or dynoed one with one but i plan to!

Dart Tunnel Ram. Trust me. Famous last words !ha,ha,ha.

Almost did the dart tunnel rams but ended up going kinsler injection off class one race motors with new ecu's don't think it cost that much more with used intakes.

How well would a tunnel ram work with a boat motor? I always assumed from my old car days the low end would suffer to much in a single speed boat.

https://cimg2.ibsrv.net/gimg/www.off...4c6d5718b.jpeg

Quote:

Originally Posted by Wildman_grafix (Post 4683791)

How well would a tunnel ram work with a boat motor? I always assumed from my old car days the low end would suffer to much in a single speed boat.

Richie Zul did quite a few of them so I'm thinking they work pretty well.

Quote:

Originally Posted by Wildman_grafix (Post 4683791)

How well would a tunnel ram work with a boat motor? I always assumed from my old car days the low end would suffer to much in a single speed boat.

That depends on runner Csa and length. Sized properly they will always be better due to the straighter line to the valve.

Quote:

Originally Posted by payuppsucker (Post 4683793)

Richie Zul did quite a few of them so I'm thinking they work pretty well.

And all Dart's :)

Quote:

Originally Posted by Wildman_grafix (Post 4683791)

How well would a tunnel ram work with a boat motor? I always assumed from my old car days the low end would suffer to much in a single speed boat.

Back then, we didn't have 500cid-700cid engines running around everywhere. Also,todays cyl heads and hyd roller cams are lightyears ahead. Bolt on 400cfm raised runner heads to your door as quick as you type in your cc #. Amazing world we are in.

Lastly, a certain tunnel ram isn't the same as the net. Runner cross sectional area and length and plenum volume all determine what rpm vs cid vs power it ill make. Same with single pane intakes...thus why it drive's me nuts (single plane intake manifolds mostly) when talked about generically.

Another thing is, people back then didn't really realize the different timing requirements of the tunnel rams. They typically love a ton of initial timing.

Quote:

Originally Posted by SB (Post 4683664)

Thats sort of my point. Growing up I only saw tunnel rams on jet/V drive boats and never on a street car because they were too “radical”. Technology has improved so much that now we’re adding spacers upon spacers to single planes creating a bastardized version of a tunnel ram without the benefit of better fuel distribution.

I think given the advancements of engine building the tunnel ram may be a good option again.