Wayne.  Afraid I don’t have any spreadbore Holleys here so that option is out.  But I have tested vacuum secondary carbs against double pumpers and the vacuum secondary carbs when tuned properly and being equally sized outperform the double pumplers on the bottom end of the scale.  They are equal on the topend of the scale all else being equal.  The dip in the torque curve that’s observed with the EMC headers does go away when mufflers are added.  The muffler part of the test is just not in this particular thread though.  The Sanderson headers without mufflers had a very strong lowend torque curve without the lowend dip that’s evident with the larger collector sized headers.  At this point, there’s a strong relationship in the lowend torque numbers and the collector exit size.

 

Here’s the link to the thread including graphs for the 314 engine with EMC headers with and without the mufflers.

Exhaust Testing – Mufflers versus No Mufflers 

Lorena, Texas (South of Waco)

hi ted, could you try a 800 cfm spreadbore double pumper once to see if it would bring the torque up at the lower rpm's and get rid of that dip. i think it might be when the vacumm comes in. i've always liked these carbs for milage, plus performance when you want it on the street. just a thought and only if it's not much trouble, thanks, wayne.  P.S. use a four hole adaptor if you have it.

 lincoln/merc. y-blocks &mel's                                                               bucyrus, ohio.

Ted,



I shipped the 57 Tbird Sanderson headers this morning from California. There is an envelope with all my contact info in the box and I sent an email a few minutes ago to Eaton Balancing with the same info. Thanks.




57 Black Tbird 312/auto

Glen.  It’s your call on sending the headers or not.  They can be tested on your engine against another ‘known’ set and comparisons made that way.  But if you send them, I’ll test them on the dyno mule with the other headers.

 

Al.  Same deal.  If you send them I’ll include them in the test.  Your call though as there are plenty of headers here now to test.

 

Mark.  Be sure to include a return shipping address and phone number in the box with the headers.  Would like to get them back to you as soon after testing as possible.

Lorena, Texas (South of Waco)

Yes!  Thank you Ted!  You give us so much info that we could not get on our own without great cost.

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Ted for what it's worth.......thanks for your time effort and expense!

Frank/Rebop

Bristol, In ( by Elkhart) 

Ted,



Good deal. I will get them out to you this week. I don't think the Tbird Sandersons will perform as well as the Sanderson truck shorties but hopeful they will do reasonably well.

57 Black Tbird 312/auto

HI Ted, I'm running and have in use the Ford Power train Tbird headers that come out of Washington. (you know the ones Mummert has on his site) Any chance you might be able to test them. I might be able to loan mine if necessary.

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK    

Ted, if I can find a box, I will send you my cobbled together junk. I had planned on just bringing them when the engine is ready, but I would be interested in seeing how they compare to the others that you have on hand. I'll give you a call if and when I ship them.

Glen Henderson



Freedom is not Free

Letohatchee, AL

I’ll take you up on the offer on the header loan.  The more the better at this point.  Go to this website for contact info and/or a shipping address.   http://www.eatonbalancing.com/   

 

Here’s a list of exhaust tests that are in the planning stages thus far.

Early single exhaust manfolds with crossover pipe and a length of 2” exhaust pipe.

’57 exhaust manifolds with dual exhaust pipes.

Fenton exhaust manifolds with dual exhaust pipes.

Rams Horn manifold with dual exhaust pipes.

EMC headers w & w/o muffers and variety of exhaust extensions.

Burnette T-Bird headers (shorty design and Tri-Y).  Not firing order specific.

Pickup Tri-Y headers with a Y specific firing order into the tubes.

1 5/8” tube fenderwell headers.

1 ¾” tube fenderwell headers.

1 ½” tube Sanderson pickup headers.

1 ½” tube shorty heades with square collectors.

Reds two tube car chassis headers.

Christenson 4 tube chassis headers. (shorty design)

Lorena, Texas (South of Waco)