For a pump gasoline 352” Y with ported aluminum heads, here are the summarized dyno results when testing a pair of modified ECZ-B iron intakes against a trio of ported and unported Mummert aluminum 4V intakes.  The Mummert intakes are not to be confused with the Blue Thunder intake manifolds.  Although the same 750 cfm Holley carb was used throughout this particular intake test, each intake was optimized with the appropriate carb spacer and jetting.  In reviewing the best sets of data for each tested intake, I do see where all the carb spacers were 2” in height but the style did vary somewhat.  What you see here are the best results for each intake that was tested as each manifold was tested with a variety of carb spacers.

 

1.      Fully ported ECZ-B iron intake still retaining the four carb holes, 455 HP and 429 TQ.

2.      Fully ported ECZ-B iron intake with two ovals instead of four holes, 472 HP and 442 TQ.

3.      Mummert alum 4V intake stock out of the box (no porting at all), 487 HP and 443 TQ.

4.      Mummert alum 4V intake fully ported with no divider, 499 HP and 450 TQ.

5.      Mummert alum 4V intake fully ported with divider, 502 HP and 451 TQ.

Lorena, Texas (South of Waco)

I have tested the modified iron “B” intakes against the Mummert intakes and the difference is substantial.  Because I don’t recall posting that particular piece of information, I’ll work on getting the dyno numbers pulled up and posted within the next few days.

Lorena, Texas (South of Waco)

Ted;

This information may be in previous threads somewhere in the past, but have you run any comparison tests between a modified ECZ-B intake vs. Mummerts intake?

Rono

  Ron Lane,  Meridian, ID

as usual, you can not put a value on this information, God bless all contributors to this site!

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?

Thanks for posting.


holiday on horseback 

The Reds headers I have on hand are what I’d call a two tube design.  They essentially bolt up to the stock lead pipes so they are also quite short.

Lorena, Texas (South of Waco)

I actually do have plans to test a factory ’57 dual quad setup with the original dual quad Teapot carbs.  This particular setup is one I've had for awhile and will be sorted out on the dyno mule prior to any cylinder head testing just to check out the setup and see where the horsepower level is with that setup.  I just recently rekitted the carbs and installed new secondary diaphragms so they should be good to go.  After the 2X4 setup proves itself, it goes on my 272 in my ’55 Customline with the ’56 style oblong air cleaner.

Lorena, Texas (South of Waco)

Were the Red's Headers the single or dual tube type?  The single tubes look restrictive, but the dual tubes don't look bad.  If I remember correctly, Karol Miller went 142 with stock exhaust manifolds, and added 10 MPH with better exhaust.  I don't know if he went from headers to the straight pipes through the front fender.

Paul J. - '57 E Code

Ted,   Thank you for taking the time (which must have been considerable due to the amount of manifolds tested and everything leading up to testing!) and posting this invaluable info on this site for those of us with limited skills/knowlege/equipment to find out which would be best for our applications when you don't know the difference between a Edmunds or an Edelbrock 573,except that they each have "3" carbs(LOL). Now about step#2-- would it be possible to compare the dual quad manifold to the single 4-barrel manifolds to be tested to see how it rates and see where it stands with the tri-power setups ratings??? This seems to be the only manifold left to test,and all would have been tested on the same engine for an accurate comparision!  Thanks again! KID

Ted/John,

In the exhaust issue department, What are the best diameters for headers and exhaust systems for a healthy street car?

should primary's be 1 5/8", 1 3/4" and what size collector? should the rest of the system be 2" 2.5" or larger?

I wanted to start making my own set of headers is why I am asking this.

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?