Hey, thought I'd drop a comment. I've been doing some plenum research following what I've learned from Sasha. I too, have been looking into other plenum/intake fabrication to see what this motor is really capable of. Somewhere on a my350z forum there's a guy that literally chopped that lower plenum in half, so the top half of those runners are completely gone. Instead of a hole it's a semicircle with the top half completely open to atmosphere. Imagine looking at the lower plenum from the side so the edge is perfectly flat, then shave the upper half of it. I have yet to see if that made any gains but it's in line with what you said - the longer the runner the worse the power may end up. Tune or not the longer runner is adding more restriction to airflow, at the very least it's making the air travel for a longer duration and undergoing all sorts of bends and curves before reaching the combustion chamber. I'm kind of curious and want to try it out for myself.
Let me get into detail so you know what I'm talking about- So we have the upper plenum which is removed by all the upper 10mm, then the lower plenum that houses the plenum gasket with allens and 10mm. See the 6 runner holes? Now imagine the top portion of those runner holes are gone. If you need another angle of understanding, stand to either side of the car and look the lower plenum line, the level where its edges sit. You can see the top half of the runner holes from this angle- same thing, imagine that top half is completely gone. There is no clearance issue as you are removing material from the enclosed space between upper/lower plenum. Fuel rails don't get touched as you aren't going any deeper than the initial lower plenum, neither the injectors. The only issue is in theory will this destroy low end torque, as you need some form of velocity to optimize torque, which means restrict and squeeze airflow. However, in the top end you'll have no restrictions within the plenum, and at a molecular level each air molecule effectively takes less time to make it from the cone to the combustion chamber, making it more efficient hence more power. At least that's what I think will happen, LOL!
@@Chapo-559 makes more Tq. For me, doing this build was to bring balance. I like TQ more because that what you feel when accelerating. Since I did Camshafts and springs on this car I wanted to improve power delivery , move the power/tg further to the Right and raise the revs. Since I did that's why I did port and polish.
Hey, thought I'd drop a comment.
I've been doing some plenum research following what I've learned from Sasha. I too, have been looking into other plenum/intake fabrication to see what this motor is really capable of.
Somewhere on a my350z forum there's a guy that literally chopped that lower plenum in half, so the top half of those runners are completely gone. Instead of a hole it's a semicircle with the top half completely open to atmosphere. Imagine looking at the lower plenum from the side so the edge is perfectly flat, then shave the upper half of it. I have yet to see if that made any gains but it's in line with what you said - the longer the runner the worse the power may end up. Tune or not the longer runner is adding more restriction to airflow, at the very least it's making the air travel for a longer duration and undergoing all sorts of bends and curves before reaching the combustion chamber. I'm kind of curious and want to try it out for myself.
You should do so sir
Thats informative. So you mean literally chop it . What about clearances fuel rails, injectors .
Let me get into detail so you know what I'm talking about- So we have the upper plenum which is removed by all the upper 10mm, then the lower plenum that houses the plenum gasket with allens and 10mm. See the 6 runner holes? Now imagine the top portion of those runner holes are gone.
If you need another angle of understanding, stand to either side of the car and look the lower plenum line, the level where its edges sit. You can see the top half of the runner holes from this angle- same thing, imagine that top half is completely gone.
There is no clearance issue as you are removing material from the enclosed space between upper/lower plenum. Fuel rails don't get touched as you aren't going any deeper than the initial lower plenum, neither the injectors.
The only issue is in theory will this destroy low end torque, as you need some form of velocity to optimize torque, which means restrict and squeeze airflow. However, in the top end you'll have no restrictions within the plenum, and at a molecular level each air molecule effectively takes less time to make it from the cone to the combustion chamber, making it more efficient hence more power. At least that's what I think will happen, LOL!
Yea the non rev up is not stronger 😂 than the rev up 😂
@@Chapo-559 makes more Tq. For me, doing this build was to bring balance. I like TQ more because that what you feel when accelerating. Since I did Camshafts and springs on this car I wanted to improve power delivery , move the power/tg further to the Right and raise the revs. Since I did that's why I did port and polish.