Just arrived Pocatello, Idaho, Intake was shipped Monday, Should have it Wednesday or Thursday.

Thanks Billy.  I’ll be on the lookout for it.  Likewise it looks like there will be several other 3X2 intakes also showing up within the next week or so.

The actual 3X2 intake manifold testing, providing all the various parts and intakes show up in a timely manner, will take place in a couple of weeks.  Although I typically reserve much of the results from testing on Y stuff for the YBM, this will be an exception as I’ll use the forum to give some basic summaries on how the various intake manifolds do perform.  If it wasn’t for the forum, the 3X2 testing with the various intake manifolds would not have happened so that’s the least I can do for the forum members.  I was originally only going to test the 553 and 573 Edelbrocks simply because both were here but the generosity of the forum members in sending all the other intake manifold designs is what's really making a definitive test a reality.

I'll publish the horsepower and torque graphs on the forum at the conclusion of testing as these give a much quicker grasp of what’s really happening versus just showing the dyno sheets with a bunch of numbers.  The detailed writeup will still go to Bruce at the YBM.

Looks like all the intakes for testing have already arrived.  Thanks guys.  Have received the Offy intake from Cactus, Edmunds intake from Billy, another model Edmunds intake from Ed, and the Weiand intake from Jim.  Already on hand was the Edelbrock 553 and 573.  In comparing the intakes, there are some very noticable differences.  All the 3X2 intakes are of a true dual plane design except the Offy which has a common plenum under the carbs and the dividers themselves are quite short and are separting the flow going into the individual head ports.  First impressions are that the Offy intake will be sluggish or low on torque at the bottom end of the testing range but should essentially make reasonably good top end power.  The Weiand intake is a large runner and compares nicely to the Edelbrock 573.  The two Edmunds intakes are also two different designs although both are the smaller port configuration.  I’m currently gathering up enough fittings and thermostat housings so that the time spent in changing out the intakes during testing is minimized.

The dyno test range for the 3X2 intake testing will be 2500-5500 rpms.  This is low enough that low end torque attributes can be measured while also high enough that the engine will be peaked out with the current stock head and Crower camshaft combination.  All testing will be through the mufflers.

Are we out of luck on the Fenton 3x2?

Thanks for letting us know the intakes arrived ok.

2nd, Will you be doing any progressive linkage and non progressive linkage test, or are you just going to do all with progressive linkage?

At this point, I’m really curious as to why the 1971 Popular Hotrodding test on their Y had what I would consider to be dismally low horsepower numbers even with their +060 over 312 engine having ported heads, popup pistons, and a nice cam.  Their engine did have the Offy intake which has been reported to be the worst ever 3X2 intake for a Y so this test is in part to see if that was indeed the case and possibly explain why those old test numbers were so low.

I believe the 354 was made for the '54 engines with their smaller ports.  When the '55s came out, Edelbrock probably said "Oh Sxxt". and started tooling for the larger ports.