Cam Specs

[65 Dartman]

i inherited 2 brand new cams that the prior owners bought for the motors that I inherited - a 72 truck 318 and a 70 340. Racer Brown checked them and measured lift, duration, etc for me. I have no idea who made either cam. Here’s the info on the 318 cam which looks like a pretty mild cam.

And the cam for the 340 which is definitely a step up or two over the old 268/276 (or was is 272 - memory not that great!) 340 cam

Anyone care to comment on either of these cams.

 

[Abodybomber]

i inherited 2 brand new cams that the prior owners bought for the motors that I inherited - a 72 truck 318 and a 70 340. Racer Brown checked them and measured lift, duration, etc for me. I have no idea who made either cam. Here’s the info on the 318 cam which looks like a pretty mild cam.View attachment 1715207727

And the cam for the 340 which is definitely a step up or two over the old 268/276 (or was is 272 - memory not that great!) 340 camView attachment 1715207728

Anyone care to comment on either of these cams.

First is a nice low compression, daily driver cam...
Second : reminds me of a 70' s-80's ,Crane Fireball camshaft ... ( would like 3:55 -3.91 gears ,a 2200-2800 stall , and some bowl porting,/ head work would be sweet. (Will work well with 1.88 intake valves.

 

[rumblefish360]

View attachment 1715207727

The way I see the 318 cam below is a 100% daily street driver that has a tighter 110 instead of the 114 that cam stock. This produce a muscle car choppy idle rhythm which will aid in better and more low end torque with peak power slightly extended vs the stock camshaft. You could still use your OE 2bbl. carb with this one as well as the exhaust.

View attachment 1715207728

The way I see this 340 cam below is about the same as the MP upgraded 340 cam. 1st step above stock. The lift & duration @.050 is similar. I myself am not crazy about the large spread between the advertised duration and the duration @.050, but it should be fairly fine in a normal upgraded 340 with the normal blot on parts seen.

The OE HP 340 cam and the first step upgrade cam both had similar advertised durations but there duration @.050 was very different. There centerlines were @ 114 stock and 110 for the upgraded cam. The overlap increased a lot as well.

This cam would be typical of the “back in the day grinds” for the general hop up. A better carb intake and exhaust in the form of headers could net around 360+ hp from the engine. Part selection is important on the figures. Use the best of the best well tuned and use a well thought out exhaust after the headers and it will be an everywhere driver with guts.

You can expect mid to low 13’s if done right.

That’s my opinion and I’m sticking with it!
LOL

 

[Wyrmrider]

Did Jim say if these are hyd or solids?
if hyd
The first one looks like a 204/204 white box cam (which are usually measured at .004) like a wolverine WG 1105 (also on 110) which is tighter than the 113 of the 360 70-72
a more modern (cough) would be Cam Dynamics 15003/ Ed Hamburger 2701 about the same duration but .427 lift
Elgin E-626-S TRW TM 627 would be close but 109 LCA

second one is not to aggressive as there are many cams out there with that lift and only214/224 type duration
and comp purple plus gets .484 lift with 284/291 duration and Howards gets around 550 with 283 @006
so I'm thinking this is a hopped up 340 cam given the 114 LCA
interesting
444/453 276/284 (52) 114 112ICLP3423044 68 340 MT duration is at .008

 

[Abodybomber]

Did Jim say if these are hyd or solids?
if hyd
The first one looks like a 204/204 white box cam (which are usually measured at .004) like a wolverine WG 1105 (also on 110) which is tighter than the 113 of the 360 70-72
a more modern (cough) would be Cam Dynamics 15003/ Ed Hamburger 2701 about the same duration but .427 lift
Elgin E-626-S TRW TM 627 would be close but 109 LCA

second one is not to aggressive as there are many cams out there with that lift and only214/224 type duration
and comp purple plus gets .484 lift with 284/291 duration and Howards gets around 550 with 283 @006
so I'm thinking this is a hopped up 340 cam given the 114 LCA
interesting
444/453 276/284 (52) 114 112ICLP3423044 68 340 MT duration is at .008

Nice work....

 

[65 Dartman]

Did Jim say if these are hyd or solids?

Both are hydraulic

 

[rumblefish360]

Then they should be dead reliable everyday performers that will last half a zillion miles.

I’d use them.

 

[Wyrmrider]

u nailed the second cam rumble
but if it is similar to the 68 stick shift one year only 4 speed cam there is a reason it was one year only- low end- plan on spinning it up intake closes late with that duration and wide lca

 

[rumblefish360]

As I’ve Been saying, Appropriate Parts, appropriate application.

 

[nm9stheham]

Slooow ramps....62-65 degrees between .006" and .050" lifts... Usable with stock or very mild (340-ish) valve springs. But as said, reliable with relatively low loading on the lobe-lifter contact.

Much better cams out there now for lower CR engines. But if you had to bleed off excess CR, these might be perfect.

 

[Wyrmrider]

problem it's not just the intake close that is not intense
the slow exhaust close gives all kinds of exhaust gas in the intake charge reversion
Intake opening early invites back flow
exhaust opening early reduces expansion ratio- power- mileage
rev the snot out of it but it's going to leave a lot of low end on the table