Re the Offy Tri-Power intake. The analysis by Doug Thrasher that the internal design was a dud was printed in the Mar/April 2003 issue #55 of Y-B Magazine. He also made reference to the disappointing PHR Y-Blk 1971 test results. It will be interesting to see if Ted's test results confirm that the Offy intake was the problem. In any case the test results at the time were likely another undeserved black eye for our favorite engine.

Paul

Billy:

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.

John - "The Hoosier Hurricane"

Heres an Edelbrock 354 3 x 2 I just see on ebay that comes with a car, it is another number edelbrock that is probably earlier than the 553 and not mentioned often, would it be for Lincoln style Y block?

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

Daaaahhhhh, good point Ted, I must be asleep at the wheel.

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

Without looking at a Fenton 3X2 intake while it’s sitting next to some of the others, it’s going to be hard to say one way or another.  The Edmunds intakes look similar to the Edelbrock 553 for what it's worth.  But dyno testing of single four intakes that are similar in design on other engines have had surprisingly different results.  The only way to know for sure is to test.

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.

All testing will be with progressive linkage but because all testing is performed at WOT (wide open throttle) the linkage setup is not a consideration in this series of tests.

Lorena, Texas (South of Waco)

Ted,

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?

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

Isnt the Fenton the same as a late Edmunds anyway??? That result would probbably be the same.

1957 ________________ Ford

\___((_______________))___/

(@)________V__________(@)

[________I_____I_________]

__[__]__ o_______o___[__]___



Y Blocks, The New Flathead!

A Fenton 3X2 intake hasn’t shown up here yet and I haven’t been notified that one is on the way.  Anyone got a Fenton 3X2 laying loose that they’d like included on the test?

Lorena, Texas (South of Waco)

Ted,

Are we out of luck on the Fenton 3x2?

The engine is a +060 over 312 with the flattop pistons ~0.025” in the hole.  The heads are dead stock unposted G’s without any porting or modifications but are 65.9cc’s after milling.  Compression ratio is 9.2:1.  The camshaft is a Crower Monarch with an advertised 0.450” lift and 238° duration at 0.050” lift.  Advertised duration is 280° but when measured at 0.015” lift the duration is 270°.  The rocker arms are still being tested but looks like the 1.6’s will be used.  Still have some Harland Sharp 1.6 and Rocker Arm Specialist 1.6 rockers to try before going into the 3X2 testing.  Although the Dove 1.6 rockers are currently on the engine, I’ve already run the aftermarket 1.40’s and the factory 1.54’s.  Rocker arm testing should be completed sometime this next week.

 

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.

Lorena, Texas (South of Waco)