1.7 rockers make motor sound "cammed"?

[fordnatic]

Hey there, I just finished putting together the combination that should be shown below. The car sounds like its got a mild cam, could this be the 1.7 roller rockers? Or could I have a problem? it runs really well, but I'm looking for your collective input. Thanks in advance.

 

[Dbeck002]

At one point i thought my car had a came when i bought but i wasnt that lucky.


The 1.7s might help with the sound a little but the Lope is purely duration and LSA working hand in hand.

Trust me if you had a cam youd know

 

[fordnatic]

thanks for the quick reply. I know I have a stock cam. I'm just curious if the rockers contributed to the way it sounds or if I have a potential problem. I'll figure it out, or blow it up either way its a blast to drive.

 

[Allforspeed]

kind of trivial question, but i was told my car had an E cam in it when i bought it but am skeptical, the car deginately has less torque than my old lx had (though that car had the 3.27 gears, vs the 2.73's i have now)

is there any way to tell for sure if a car has a cam in it? what about if the lower intake is off and maybe the heads as well? (though i dont want to pull the cam out just to check it)

 

[Dbeck002]

Yes you can check what the cam is by pulling the lower intake off.


After its pulled, measure the maximum lift on the lifters with a dial indicator on the intake and exhaust. Right down the results on each cylinder and average all the intake values and all the exhaust values.

So 0.XXX/0.YYY is your I/E average lift using the dial indicator. The specs of the Ecam are .498/.498 if i remember correctly. So if its around that value than you have an ecam, see what i mean?

Stock cams are like 0.444/0.444, maybe a little less now that the engine is old.


one more thing, 1.7s shouldnt change the lope of the car. They might make it a little deeper or louder but the sound pattern should be the same. Rockers only change lift, not duration.

 

[18mustangs]

Hey there, I just finished putting together the combination that should be shown below. The car sounds like its got a mild cam, could this be the 1.7 roller rockers? Or could I have a problem? it runs really well, but I'm looking for your collective input. Thanks in advance.

I don't think 1.7s make one's car sound cammed as your'e only increasing lift and not LSA (and perhaps increased duration a hair). I'd check for a vacuum leak. with your vacuum hoses and intake tract.
Tim