anyone good at reading cam cards? Please help me decipher this cam!

Hey all, i've finally located the drivetrain for my 72 resto. It's been pulled this saturday and is in my garage being prepped out for the maverick.

The engine is a 5.0 roller crate motor with gt40y aluminum heads mated to a lentech aod.

The cam in question is an isky cam that was purchased to be compliant with the speed density setup that the donor was originally running.

While I'm going efi on my maverick, I've decided that it's too much to do in one build for me, and I'll save that for a future project after I get it running.

so the setup with be carb'd will a stealth manifold and the below cam. (sorry,mavdog...i've truly collected all the efi components for the swap, but I don't want to overwhelm myself on the first build with this)

can anyone tell me what this cam will be like...will it lope decently?, how will the power be with a carb? I would "prefer" to run a tfs cam..but I just don't have the cash for a cam and valve spring swap right now, so I'll have to use what the engine has for now.

Not good at deciphering cam data yet

 

It's a decent cam, nothing terribly crazy. I think you'll be pretty happy with it.

It'll give you a rough idle, but no real noticable lope, while maintaining a decent vacuum (for the SD), so your power brakes and whatever else runs on vacuum will still work.

I would install it straight up or 2 or 3 degrees advanced since it won't wake up until about 2500-3000 ish RPM. Give or take.

If you don't have a real sloppy converter in that AOD, it'll feel a little doggy off the line.

Being that the maverick is nice and light, it probably won't be real noticable. Just enough to keep you from blowing up the tires all the time.

 

That's a pretty mild cam, Comp would call it an RV cam. You want to be looking at the 0.050" numbers, they show 204°/210° duration on a 112° LSA installed straight-up (no built in advance) and -17° overlap. It won't lope but should pull 18" vacuum at idle. Power will prolly max out around 5000 RPM's...

 

thanks to both of you....not exactly what I want... URGH.

But if I get the cam and springs that I DO want, it'll set me back a few hundred.

Anyone know how this would compare to a stock HO roller cam? I have a stock HO roller cam, perhaps I should put that one in and sell off the isky to save for a better cam?

 

If its not what you want you should sell it and get the bucks apply toward what you really want. Your HO cam will serve you better if you are not running a stall with the aod.

 

That cam's best described as a warm stock cam. It's not going to lope at all. It's about the same as the 79-84 HO cam used in the 5.0's in the Mustangs. The HO roller is a LOT hotter grind. Especially if you run it with 1.7 rockers

 

really?? WHy would one run this cam over an HO cam?? I have an HO cam, and may just run it instead.

 

It's got a lil more duration and lift then the stock h.0 cam.I dont see nothing wrong with it for a SD setup if you decide to sell it let me know i may be interested

 

It has less duration than the HO roller cam. And the lift is only slightly more. Run the HO roller with 1.7's and the lift specs are equal

 

I don't know why anyone would, unless they just want a really small cam. The HO roller is better in every way

 

joe dirt...make me an offer...

I've got to think about this. If I yank it out, I only want to do it once, and for an HO cam is not my idea of fun....Not enough difference IMO between the two to warrant the work.

It's a crate motor, with the gt40 valve spring setup..>I've got to do some research and find if these springs can handle a decent cam. If they can, then I'll just pick up a tfs cam

 

ok I must be missing something here because..

The H.O is 204 @.050 and .444 with a 1.6 rocker at the valve.

add a 1.7 rocker and you gain roughly .030 valve lift depending on rocker arm manfacturing differances

so lets say .474 @ the valve for the h.o



So now lets apply the same principle to the isky camshaft

The isky is 204 int/210 exh @.050 and .465 int/.480 exh with a 1.6 rocker
which helps a stock headed motor because of the split duration and lift biased towards the exhaust side (SBF's weak area)

lets add the same 1.7 rocker

.495/.510 @ the valve with a 1.7 rocker


True that this may not seem like alot of differance in the specs but just a few thousandths in lift and degree's in the duration figures can make a "greater" gain not to mention the lobe ramps and designs.


I hope someone can find this informative to them.

 

But the HO's a roller, which means it's going to open the valves faster, thus giving it the edge over the Isky.

 

the isky is also a hydraulic roller camshaft

 

Where'd it say that ? All I saw on the card was Hyd with the cam grind number.