Cam question

A friend of mine has just imported a 351W Mach 1 Mustang from the US. Along with the car were a spare engine and a box of bits and pieces, including three spare cams. One of the cams is used and is marked “stock” on the box. The second is used and has K104 stamped on the shaft and 126?N1 stamped on the end. The third cam is unused and has two interlocking Cs on the end along with 294B6 and D9065. This cam appears to have about 4mm more lift than the stock cam. Can anyone out there enlighten me as to what they may be and if any, especially the unused one, may be useful in my 351W buildup for my GT40. At this stage I intend going with AFR185 heads, solid lifters/roller rockers and 48IDAs for induction.

Thanks,

Brian.

 

[Scott Calabro]

Brian,

The third cam with the cc stamped on the end is from Competition Cams, A US based cam grinder. Google them to find the web address, then you can use the other ref #'s 294b6 & d9065, to find spec.'s

The other two I have no idea.

Regards,
Scott

 

[Jac Mac]

Brian,

Cannot help much with first two either, however the 294B-6 is listed in the Comp Cams book as a 351c cam but not listed in the Windsor section.

It is a Flat Tappet mechanical cam with rpm range of 3800--6800.
Duration is 294 deg In/304 deg Exh advertised & 256/266 @ 0.050 tappet lift.
Lobe centers 106 deg, Lobe lift 0.340" In-0.355" Ex. Valve lash setting is 0.028" inlet, 0.030" Exhaust. Listed as a Drag race cam.

Now there is a possibility that this is a Windsor camshaft. To check measure the front camshaft journal, If it is 2.124" dia it is 351c----- If it is 2.080" dia it is for any of the Windsor series.

Those lash settings would make it quite a noisy beast in a road car, and I would like to see a bit more lobe center as well.

Jac Mac

 

[Randy V]

Brian,

Cannot help much with first two either, however the 294B-6 is listed in the Comp Cams book as a 351c cam but not listed in the Windsor section.

It is a Flat Tappet mechanical cam with rpm range of 3800--6800.
Duration is 294 deg In/304 deg Exh advertised & 256/266 @ 0.050 tappet lift.
Lobe centers 106 deg, Lobe lift 0.340" In-0.355" Ex. Valve lash setting is 0.028" inlet, 0.030" Exhaust. Listed as a Drag race cam.

Now there is a possibility that this is a Windsor camshaft. To check measure the front camshaft journal, If it is 2.124" dia it is 351c----- If it is 2.080" dia it is for any of the Windsor series.

Those lash settings would make it quite a noisy beast in a road car, and I would like to see a bit more lobe center as well.

Jac Mac

Yes - With a 106LC - She'd be a pretty lumpy cam with probably a pretty poor vacuum signal to boot.
Jac Mac - I usually recommend nothing closer than 110 for a street driven car and actually prefer 112 for most engines (depending on displacement, gearing and weight) - what about you?

 

[Jac Mac]

Randy,

Yes, in that ballpark. Depends what you/they 'really' intend to do with the car. If they intend to use it in gymkana / slalom /sprint type events then I might go down to 108deg LC, but if its an open road machine where top end is important then 112 deg would be better. With some people you have to be part psychologist to work out what they really need.

Jac Mac

 

Thanks for the input everyone. Jac Mac, the front journal is 2.124" so that makes it a C cam - no good for my application. I'll investigate the second cam further.

Cheers,

Brian.

 

I've just had another look at the second cam. The missing digit is a degree sign (I can't seem to get the degree sign to show) so it is 126 degrees N1. Lobes seem to give more duration and about 1mm extra lift over the apparently stock 351W cam. It also appears the lobes do not follow the same alignment as the stockcam - perhaps it gives a 289/302 firing order? More inverstigation needed...

 

[Jac Mac]

Cams with 15426378 have front two lobes phased approx 1/2 turn apart.
Cams with 13726548 have front two lobes phased vitually in line with each other.

The no's still dont help me.

cheers
Jac Mac

 

Thanks Jac Mac. Sounds like it might be 15426378 - I'll check tonight. Sorry I didn't bump into you again at the SFOS at Teretonga this year.

Cheers,

brian.