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

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.

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)