Anyone selling a used edelbrock high rise LT4 Manifold?? I have stock red lt4 manifold and even though its ported to the max, I need more air. $500 for a new one is just too much for me now. Looking for a used one for less. Thanks

 

what makes you think you need more air ?

 

I have plenty of fuel. plenty of spark. built bottom end. a cam that should make power to 7k. and 210 AFRs. My dyno graph shows my power dropping off at around 6500. I cannot get a much bigger cam (7k rpm twists for a hydraulic roller cam is common) so the problem must lay in my air delivery. If you know what else could be causing this please lemme know. I just feel if I got the new high rise manifold with the air gap and ported that one the way I ported my stock lt4, I think that would give it the extra bit it needs to make power up top. Thanks

 

Honestly you're probably revving it a little too high. The opti tends to start to have trouble keeping up at anything over ~6000 rpm.

 

yeah and 58mm intake and throttle body and 210 heads is plenty of air, stroked 396s dont even need that much.Your power is going to drop at some point, you cant expect to have power all the way up to 7k, if you want power that high, build it to be a top end car with a top end cam