Same E303 Cam Difrent Sound

[302mustanglx]

Ok guys just a quick question here me and my buddy both have 88 mustang 5.0. His is fuel injected mine is car we both have e303 cams he has a lopy idle realy nice mine is quit it only sounds lopy when its cold when it warms up u cant even tell i have one my cam is advanced 4 degrees and i have full exhaust with super 44s his exhaust cosist of shortys hpipe stock exhaust

 

[ratio411]

Might be an EFI thing?
I have wondered the same thing.
Cam specs for EFI cars, that sound really radical are the same specs that are relatively tame on old school engines.

I always assumed it had something to do with the hydraulic roller lifters, but maybe it's all in the ECM/EFI functions?
Great question. Too bad I don't have an answer.

I have run cams on carb'd cars that were just as rough as the biggest EFI cams, but the specs were far more radical to get that sound.

 

[jsw81]

Maybe his timing is off causing it to sound lopey...I honestly never thought the e cam was that lopey from the ones I have heard in person. Sounds mild to me.

 

[a91what]

I run the e303 and i have a lopy idle, when it idles down. if i sent the idle up even 50 rpm the car no longer has that hard lope. Im running efi. 650-750= lopy 750+ =no more lope ........
Whats your idle set at? Your timing?