Camshaft for 1971 M code 351C

[1971mach1m]

How will this cam work in this engine and a stock intake manifold?

Hydraulic Flat Tappet. Lunati's version of the D2ZZ-A FOMOCO camshaft. ; Advertised Duration (Int/Exh): 280/290 ; Duration @ .050 (Int/Exh): 219/229 ; Gross Valve Lift (Int/Exh): .505/.505 ; LSA/ICL: 114 ; Valve Lash (Int/Exh): Hyd/Hyd ; RPM Range: 1500-5000 ; Includes: Cam Only

 

[TommyK]

With a 4 speed or CJ stall converter and enough gear it should be ok.

 

[Hemikiller]

Agree with Tommy, that's a good cam, but you will need a little bit of gear. It's quite a bit larger than the CJ cam which was 205/220

There are a couple caveats. First, it's a flat tappet cam, which is like playing Russian Roulette these days. Second, you say your engine is all stock - I wouldn't just toss a cam in a 55 year old engine.

If you're looking for more power, advance your initial timing and recurve the distributor, swap out the 4300 Autolite for a 3310 Holley, and add an Edelbrock Performer intake.

 

[Barrysmach1]

Agree with Tommy, that's a good cam, but you will need a little bit of gear. It's quite a bit larger than the CJ cam which was 205/220

There are a couple caveats. First, it's a flat tappet cam, which is like playing Russian Roulette these days. Second, you say your engine is all stock - I wouldn't just toss a cam in a 55 year old engine.

If you're looking for more power, advance your initial timing and recurve the distributor, swap out the 4300 Autolite for a 3310 Holley, and add an Edelbrock Performer intake.


View attachment 93428

This info is spot on !

 

[WerbyFord]

Hey I have a question about the stock 70-351c4v/300 cam and also the 72-351ho/275hp cam.
Anybody know the .050 durations or events on these:

Here’s what I have from the Ford Muscle Parts and OHO Books

351c4v/300 d0az-c
268-280 adv
???-??? at .050 ???????????????
159-170 at .100
118 LSA

351ho/275 d2zz-a
275-275 adv solid
???-??? at .050 ????????????????
197-197 at .100
120 LSA

Note that the 351Boss cam is usually said to be bigger than the 351ho.
This is true for adv duration but not at .100 duration
D1zz-b
290-290 adv solid
228-228 at .050 ?
190-190 at .100
116 LSA

And of course, specs list peak HP of the 351Boss cam at 5400rpm, but peak for the “milder” 351HO cam at a whopping 6000rpm.
I’ve never even heard a stock 351HO run (so few of them) so hard to assess this.
Any help with the ???????????????? data appreciated!

 

[Don C]

Here are some cam specs I've acquired over the years:

 

[WerbyFord]

Here are some cam specs I've acquired over the years:
View attachment 96584

Thanks Don, but those are .100 lobe not .050 lobe.
Also in that chart as in some of the books, there's math errors in the 72-351CJ cam at .100

FoMoCo started giving .100 lobe events way back circa 1957, but hard to find the .050 equivalents sometimes!

 

[Hemikiller]

There's a used D0AE-C M-code cam on eBay that would make a great candidate to get the needed info from.

https://www.ebay.com/itm/2671216191...uid=XqhhXK8YTnO&widget_ver=artemis&media=COPY

 

[WerbyFord]

There's a used D0AE-C M-code cam on eBay that would make a great candidate to get the needed info from.

https://www.ebay.com/itm/2671216191...uid=XqhhXK8YTnO&widget_ver=artemis&media=COPY

Thanks, fun post. $90 for a used cam hmmm. I'm just spoiled from when they were $20 new from Ford Parts.
And of course I didnt degree anything back then, duh. But life was busy.

I've had people send me cams & always happy to degree them, but I'll stay with my guess of 192i 200e for the 351/300 M-cam for now.

The 72-351ho to me is the real mystery, at .100 it specs BIGGER than the 71-351boss cam.
Why would they do that with a compression drop down to 8.8 and smog so tight it affected which engines got ram air?
So I wondered about the .050 mainly on that cam.