Crossram questions

[olddog]

At 10800 rpm and 100% VE (not likely) a 289 would suck in 900 CFM.
At a more realistic 80% VE your looking at 13,500 rpm.
You need the smallest carbs you can find, in my opinion.

[Tongue Pirate]

That's kinda where I was headed with my thinking. I wasn't sure if a Cross Ram such as the one pictured would create any sort of situation to where an increase in vacuum might pull the secondaries open. I am fairly familiar with Carbs & manifolds but really haven't run any manifold similar to the one pictured.

[Jim Vander Wal]

I'll pipe in on the crossram style manifold and in particular the Smoke Ram SY1 from Edlebrock on a '69 Z/28 302 in a '67 Vette. 700 double pumper, stock Z/28 solid cam, 11:1, angle-port fuelie heads, 1 3/4" headers, 4-speed, 3.23 gears 3,150 pounds. Just to set the stage.

The coolest combination I have ever run. 7,000 rpm and more, good bottom end power and worked all through the rpm curve from about 2,500 and up.

If I could run this style manifold on my SB 427 I would in a heartbeat. Size the carbs properly and ROCK. Would be way cool.

If it fit on a 9.5" deck height 351 I'd tell you how horrible it would be and offer to buy it just to take it off your hands.

Run it with the right carbs and enjoy.

Jim 1855