Greetings to all: The rebuilding of the 292 in my F100 is now in the planning stage. I finally found the cam of my choice offered by an outfit called "Thunderchicken Automotive." This is the standard 57 Ford cam with 256 advertised duration, 208 @ .050, 113 LSA, INT. centerline 110, EXH. centerline 116, I believe this would mean it's advanced 3 deg., INT. lobe lift .269, EXH. lobe lift .282, Timing @ .050: INT. opens 6.4 ATDC, INT. closes 34.3 ABDC, EXH. opens 39.5 BBDC, EXH. closes 12.1 BTDC. I have been able to confirm some of this data as I still have a very used 57 Ford cam with "EDB" to compare it to. I have been in touch with Cid at Thunderchicken Auto and was informed that this cam was ground from lobe masters made from the original 57 cam. I think this may explain the lack of .003 lobe lift. I haven't purchased this cam yet but it is on my list. Just Google Thunderchickenauto and it should come up. They refer to this as the "EDB" cam. I was told these specs were from the Cam Doctor provided by the grinder. If anyone has had experience with this vendor, please comment. Hope this helps............JEFF

64F100 57FAIRLANE500

Camshaft measurments were not taken by Ford at .050 .This leads into a grey area where timing event specs get juggled around.

The only way to ascertain .050 specs is to use a Cam Dr (or similiar device) and measure your original camshaft.Then you still have to account for its wear on the lobes.

I may have just that information on my other computer.I will check and post back tomorrow.

Oldmics

Those specs are taken at .050 by a cam doctor (ie. valve opening and closing events and duration at 208). Most of the information can be deduced from the Ford specs and it seems to agree. Seems this cam offered by Thunderchicken is indeed the 57 "-B" cam. Some things must be at a specified lobe lift to compare apples to apples. However, lobe centerline and seperation are positions in a circle which I have been able to compare all sources of info and all seems to agree including my crude measuring with V-blocks, a degree wheel and dial using my very used 57 cam. That's why I believe this cam is the real deal. To me, anyways, it is one cut above the "de-tuned" cam and is excellent in the low end area plus a very good cruiser. This is how I will be using my 64 truck. Mr. Oldmics, any info you may have will help much. I have noticed several threads related to this cam so maybe all this will prove is the B7A-6250-B cam in indeed available to those of us that have been looking for one. Thanks, JEFF..................

64F100 57FAIRLANE500

I believe we should start at the basics for information comparison purposes.

Specs I have for the B7A-6250-C (EDB-6250-C ) cam are ,Intake lift .260  /Exhaust lift .273, lobe sep 113 ,duration 256 which I believe to have been measured at .015.

The B7A-6250-C cam that I have measurements for agree with your 208 duration at .050- BUT we are nowhere near close on the event timing and centerline specs.

The S.A.E. measured locations of the timing events that Ford used are useless in an .050 discussion so I am omitting them at this point.

I believe that you may be in consideration of different specifications based upon your previous post.

Please be good enough and confirm or deny your lift specs to my Ford engineering specs.

I have been aware of this "ThunderChicken" cam for a while now.It seems to be the only game in town in regards to an original stick grind.But lets see how close it really is.

I would also be concerned about the metalurgy pedigree of any cam these days.

Oldmics

Further information relevant to this posting-

In an extensive article on Cams, in issue #77- Nov.-Dec.2006 of YB Magazine, J. Mummert gave the following specs for the 1957 EDB Cam. (also refered to as the 245 HP or "D"code cam) Intakes first;

Advertised duration 256 degrees.

Duration at lash 285/268.

Duration at 0.50 lift 209/208 degrees

Lobe lift 271/283

Lobe seperation 114 degrees

(These are grooved cams.)

He also noted that historically cam grinders have used different intitial lifts for measureing advertised duration. Essentially these figures are of little or no value. The excepted starting lift currently is 0.20 "

He also noted that this cam was notibly somewhat hotter than the earlier & post 1957 cams..

Paul

Oldmics: the intake lift of .260" you posted is roughly consistent with the 1955-56 & post 1957 Ford cams, not the 1957 EDB cam. The lift of .273" on exhaust does not appear anywhere on Mummerts chart... so ?

Paul

Just get a mummert (Clay Smith) 272 cam or go with the 282, I got the 272 and it performs great, He's done his homework! do wish I would have went with the 282 for a litlle more, but no complaints with the 272.

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?

Just get a Mummert (Clay Smith) 272 or 282, I got the 272 and it performs great, hardness garranteed, he has done his homework, wish I would have got the 282, but no complaints with the 272, performs awesome.

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?

oops! diddn't think my other post went through, didn't show it on this end.

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?

Greetings everyone: PF Arcand pretty much sums it up. Provided were specs published in a 2006 YB magazine by J. Mummert of the 57 EDB cam or referred to as the 245HP "D" code cam. Yes, that's the cam and all other information I have found seems to agree. At least within 1 or 2 degrees and .001 or .002". The "Thunderchicken" cam more than likely is it. Someone else questioned the quality of parts from this vendor. Good point. IF I end up buying this cam from Thunderchicken, I'll let everyone know how it holds up as occasional lobe lift checks will tell the story. You guys probably think I'm nuts with this 57 EDB cam business but too lengthy to go on here. Thanks, JEFF.................................

64F100 57FAIRLANE500