LT1 Buddy of mine always talked about it.

 

well john.
best example i can give is when your at your local nhra nationals, listen to the motors run by the likes of kenny burnstein and john force. thats cam surge.

my fuel bike has it some, but not as much as others.

steve frank

 

You can try the poor man's cam surge by setting your idle too low w/ an aftermarket cam and letting the IAC wreak havoc. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

 

I get a wee bit of surging, and I know it's not the IAC...

 

I used to get it really bad when I had the M6 setup with my comp cam, I got a TH400 now and I also went with the custom programming, the car took 1 day to get used to the programming, and after that its been great, no surging at all... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

PSJ, i believe surge is caused by intake manifold absolute pressure is uneven(from overlap with cams)this unstability confuses PCM and it doesnt compensate properly,Why else would reprogramming pcm fix the situation? Raising the idle speed helps to lessen exhaust dilution of incoming intake charge(less time for charge contamination).