first ILL point out that you can get far more effective cams than the CC thumper line , even cc will tell you if they are truthful that they have cams that make better power curves.
now to answer your question,
the thumper cams get that rough idle by changing the valve timing events to maximize low rpm reversion pulses.......the same low rpm reversion pulses that drive the stock EFI sensors nuts in a stock efi computer, are the cause of the rough/lope. the cam timing was designed more to get the (SOUND) tham maximize the engines potential power.
your two choices are run a DECENT CAM designed to work with the stock computer AND maximize the engine potential,...OR... CHANGE the software and computer that controls the EFI and reads the sensor imput.
OR better yet....DO BOTH!
keep in mind your drive train must match the cams intended RPM BAND.
if your going to stick a decent cam that maximizes the 350-383-406 sbc you need to have a long talk with the cam manufacturer of your choice about maximizeing and matching the rest of the components
Im running a CRANE 114661, I ran a CROWER 00471 at one time that made slightly better high rpm power, but was not quite as smooth in traffic, those were the two best cams I found out of almost 20 tested in my 383 so far, but remember you need a 3000 stall converter, your 2500 stall MIGHT work with a slightly lower durration, (something like a CROWER 00483) http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=00483&x=24&y=10
and youll need that 3.73:1 rear gear to match the cam and at least a 10.4:1 cpr, to maximize the tq, and a 3" full flow exhaust with an (X) and bigger injectors, sure won,t hurt, my 36 lb are almost maxed out at about 6000 rpm I should have 42 lb injectors
why not talk to crower or crane I find far better customer service there!
Crower Cams & Equipment Co., Inc.
Phone: 619-422-1191
CRANE
8am - 7pm Mon.- Thurs.
8am - 5pm Fri. EST
Tech Line - 386-258-6174
LOOK GETTING a MASSIVE torque curve and instant responce from your engines far more important, to making your car fast than installing a cam for,SOUNDING "BAD" but being a wussy at the track!
Id much rather have the ability to lay twin 150 foot long black tire tracks in a parking lot ,than to sound (BAD) but only leave 25 feet of rubber to mark my territory
now to answer your question,
the thumper cams get that rough idle by changing the valve timing events to maximize low rpm reversion pulses.......the same low rpm reversion pulses that drive the stock EFI sensors nuts in a stock efi computer, are the cause of the rough/lope. the cam timing was designed more to get the (SOUND) tham maximize the engines potential power.
your two choices are run a DECENT CAM designed to work with the stock computer AND maximize the engine potential,...OR... CHANGE the software and computer that controls the EFI and reads the sensor imput.
OR better yet....DO BOTH!
keep in mind your drive train must match the cams intended RPM BAND.
if your going to stick a decent cam that maximizes the 350-383-406 sbc you need to have a long talk with the cam manufacturer of your choice about maximizeing and matching the rest of the components
Im running a CRANE 114661, I ran a CROWER 00471 at one time that made slightly better high rpm power, but was not quite as smooth in traffic, those were the two best cams I found out of almost 20 tested in my 383 so far, but remember you need a 3000 stall converter, your 2500 stall MIGHT work with a slightly lower durration, (something like a CROWER 00483) http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=00483&x=24&y=10
and youll need that 3.73:1 rear gear to match the cam and at least a 10.4:1 cpr, to maximize the tq, and a 3" full flow exhaust with an (X) and bigger injectors, sure won,t hurt, my 36 lb are almost maxed out at about 6000 rpm I should have 42 lb injectors
why not talk to crower or crane I find far better customer service there!
Crower Cams & Equipment Co., Inc.
Phone: 619-422-1191
CRANE
8am - 7pm Mon.- Thurs.
8am - 5pm Fri. EST
Tech Line - 386-258-6174
LOOK GETTING a MASSIVE torque curve and instant responce from your engines far more important, to making your car fast than installing a cam for,SOUNDING "BAD" but being a wussy at the track!
Id much rather have the ability to lay twin 150 foot long black tire tracks in a parking lot ,than to sound (BAD) but only leave 25 feet of rubber to mark my territory
