The difference in money between the two cams in negligable, I'd go with the 268 for two reasons: The rpm is no where near crazy, and, it doesn't sound like your done with that project to me!

It seems the heads make much more difference than the cams, I went down the list of the heads listed in my database for 351's. The range of results was unexpected.

Have fun, and if ya need more number run, don't hesitate to ask.

 

I think you might be right. Thanks for the offer, if I need to get another virtual guesstimate, I will try and find ya. Don't forget keep us updated on the 521 monster, thanks again for your time and energy, later

 

Ratsmoker

If you don't mind , I have another one I would like compared to the other grinds. It came up on another site that someone was using this version and seemed to like it. As previously mentioned a couple of times before, if you can I appreciate it, if not, well, I still appreciate your taking a look, thanks

4X4X262 version
Camshaft Specification Table
Part Number 35-239-3
Engine 1969-1995 Ford
351ci,
Windsor,
8cyl.
Grind Number FW X4 262H-11
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.493 0.512
Duration At 0.006 Tappet Lift 262 270

--------------------------------------------------------------------------------

Valve Timing At 0.006
Open Close
Intake 24 58
Exhaust 70 20

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 107 Intake CL
Intake Exhaust
Duration At 0.05 218 226
Lobe Lift 0.308 0.32
Lobe Separation 111

 

There was really no difference between the two on the graph. As far as how they would compare on paper the 4X4 cam would have a very slightly flatter powerband with slightly less peak torque. It may rev another 200rpm or so. The only real differernce was 1 degree on the LCA and a little more lift on the exhuast.

 

Once again appreciate it Ratsmoker.

Seems all the 4X4 262 cam would provide over the XE262H cam would be springs that wear a minute amount quicker. Thanks again, later

 

Ratsmoker

So am I starting to bother you yet? Hope not.

I was recommended another one, all together, if you have interest or some free time and extremely bored, could I get you to run this one as well. Sorry I keep bothering you, just trying to make the right choice. Again I appreciate your time, thanks



FS 268
Camshaft Specification Table
Part Number 31-416-4
Engine 1963-1995 Ford
289ci-302ci
8cyl.
Grind Number FS 268AH-8
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.494 0.494
Duration At 0.006 Tappet Lift 268 276

--------------------------------------------------------------------------------

Valve Timing At 0.006
Open Close
Intake 26 62
Exhaust 66 30

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 108 Intake CL
Intake Exhaust
Duration At 0.05 222 226
Lobe Lift 0.308 0.308
Lobe Separation 108

 

Here it is.

 

Thanks ratsmoker.


Now that is interesting, that cam had only 494 lift on both sides, however it did have a smaller lobe seperation, and more exhaust duration @ .050. It would definitely have a rough idle with the lobe seperation and more duration, and the torque is right there. Interesting, any thoughts? Thanks again, later

 

Ratsmoker

Are any of those engines in your signature, under dyno, yours? Did you do your own body work? BTW, nice truck. later

 

I wish those enignes were mine! Those are people that own FEs. I didn't do my own body work either. It looks great in the picture but not perfect up close. I think either cam will work great. The 108 LCA will make the power band a little narrower. The other cam has more .050 duration which means that your valves are moving off the seat faster and should give you a little more power like the chart said and have a better idle.

 

Yeah thats what I thought. Well even for a 10 footer your truck looks pretty good, they don't have to be perfect to enjoy. later

 

Ratsmoker,

I have a question for you. I have a 408 stroker that I am curious what it would come up with on your Dyno Software with the cam that I have in it. Any chance I could get you to run some numbers?? If so, what all info do you need? I will be extremely grateful for your help.
Thanks
Kevin

 

Well ratsmoker its your resident pain in the @$$.

Would you be able to run a cam if the only spec I gave where:

advertised duration 290 int /300 exh
duration @ .050 214 int /224 exh
lift intake .472 and exhaust .496 at the valve or
.295/.310 lobe lift

peak torque 3000 rpm
peak bhp 4500 rpm



later

 

94F150-408

I need compression ratio, heads, cam part number, exhaust setup, intake and I think thats it.

I will probably get to both of your graphs tomorrow. Movie time here shortly.

 

Thanks Ratsmoker,

I have a 408 cubic inch stroker Windsor motor.

9.1:1 compression ratio

TFS Stage 3 port 2.02/ 1.60 heads

Bassani Equal length 1 5/8" headers

Bassani crossover

3" mandrel bent single exhaust w/ single 2 chamber flowmaster

Pro M 77mm shorty mas

Edelbrock Truck Intake, Ported

CompCam#35-306-8

Crane 1.6 roller rockers


Think that should cover it, let me know if there is anything else. thanks again!

Kevin