Best aftermarket intakes for an early 273?
I ran an Offenhauser 360 Equa-Flow (part #5699) on my early 273 with 10.5 to 1 pistons, .030 milled heads, 4 speed, dual point, street hemi profile cam, 3.91 gears, headers, & various carbs. I used a stock Carter 4 bbl, a Carter from a 383, an 1850 600 cfm Holley & the absolute best performance was from a Holley 3310. The engine was a screamer with each combo but putting the 3310 on it was like adding a steeper set of gears. It was never much for bottom end torque though, no matter what the combo was. But I had a lot of fun with it. :snakeman:
Yeah, thats the split plenum deal, I don't like them either. Just not good for Chryslers in General, but man, will it make a FE Ford run!
For low RPM, other than the dual port, Offey's weren't good at it. (Love my Port O Sonic)
I just am concerned with all the "you NEED a dual plane manifold to make torque on your 273".........
When comparing a Xcelerator to a LD4B *Low Rise Dual Plane 4 barrel*, yes........ BUT, again, the stock design small runner small port single plane makes more torque, anyone who has ever done this knows. Not saying he "needs" a dual plane, or a single plane, but, when it comes to small port engines, there is exceptions to the rule.
Will the Dual plane make more torque than a MP Single plane on a 273?
YES
Will the Dual Plane make more torque than a Street Dominator/marine single plane?
NO
WOuld it be worth running down a hard to find manifold over using an already found dual plane?
Not a chance.
The whole purpose of my argument is the simple mis-information that ALL engines will make MORE bottom end from a dual plane. It's just simply wrong.
OK, the horse is dead.
