Anybody running Mummert's Y-270S or Y-284S cams?  If so, can you provide me with the valve events so I can plug it into Dyno2000?  I already have the stuff on the common blower cams...It's only 7 am on the west coast, so I prob wont get an answer there.

James Potter
`57 Fords International



`57 Custom Tudor

`57 Fords International National Director

Pass Christian, MS (near Gulfport/Biloxi)

Probably best to call him on this one.  If you're interested, here are the numbers on a blower cam he sold several years ago.

Adv. duration 274

@.050           226

lobe lift         .295

lobe centers   112

intake opens   29 btdc, 5 btdc @.050

intake closes   65 abdc, 41 abdc @.050

exhaust opens 73 bbdc, 49 bbdc @.050

exhaust closes 21 atdc, 3 btdc @.050

valve adjustment .015

Lawrenceville, GA

Here’s the specs from the supplied card for the Clay Smith C-284-8-B camshaft (284S).

 

Intake opens 34°

Intake closes 70°

Exh opens 70°

Exh closes 34°

Int and Exh dur at 050 = 236°

Int and Exh valve lift = 0.462” based on 1.54 rockers

Int and Exh valve adj = 0.018”

Lorena, Texas (South of Waco)

Thats what I am looking for guys...Thanks a bunch..

James Potter
`57 Fords International



`57 Custom Tudor

`57 Fords International National Director

Pass Christian, MS (near Gulfport/Biloxi)

Here’s some more info on the 284 cam that I came across in my notes.  These numbers are from an actual cam installation.

Intake opens     33° BTDC    @ 0.018”

Intake opens     12° BTDC    @ 0.050”

Intake closes    41° ABDC    @ 0.050”

Intake closes    60° ABDC    @ 0.018”

 

Exhaust opens  69½° BBDC  @ 0.018”

Exhaust opens   48° BBDC    @ 0.050”

Exhaust closes   5°  ATDC    @ 0.050”

Exhaust closes  24° ATDC    @ 0.018”

 

This particular camshaft was ground on 108° lobe centers and installed at 105¼° intake lobe centerline (3° advanced).  Lobe lift was 0.294” on the intake and 0.292” on the exhaust on the two lobes being measured.

Lorena, Texas (South of Waco)