Flow increase may be due to a slight venturi effect with more stable laminar flow. Another factor could be friction reduction at the boundary layer. That what increases flow on an exhaust port when you add a pipe. I like to leave a .030" difference between port transitions to aid in wet flow management not just anti-reversion. Don't sweat the haters, you can't please everyone.
@@servediocylinderheads it's sad that so many people malign him when he's just trying to share his massive knowledge base. He seems very misunderstood.
@@servediocylinderheads Yes, I've always left a 20-30 down step... I think the real reason was that there might be a slight misalignment as to where the parts fit together. I'd rather have a drop off than hit a slight wall. (Let's not get to the Edelbrock Cleveland thing here, LOL)
dont worry too much about seeming long winded. Do you remember geometry "proofs" back in high school? Well, increased understanding in the present gives rise to increased ideas in the future. Tedious yes, but is the price to pay for a possible future breakthrough.
Speaking of the Chevelle, do you have any plans to put it back in action? Street car or drag car? From the glimpses I have caught of it in some of your videos it looks nice and solid.
would love to see the setup with runners attached, with and without a bit of tape covering the top 25% of the round manifold to curved runner connection as a ledge. you would ideally ramp it with clay to the tape line. On inlet air would see a ramp that pushes some more air towards the outside of the runner radius where it would be biased already but on reversion any air on the roof of the intake manifold would hit a ledge pushing some of the air down 180' away from the turn it has to make in the radius up to the plenum. Then, to prove effect flip the ramp direction and do the same test with the ledge on the bottom with 2 ramp directions as well for 5 test configs taking inlet and reversion flows on each. The large ramp would be test only to prove effect works you wold be likely want
I would imagine extra anti-reversion steps in the intake would also have a bonus effect of helping to re-atomize any liquid fuel on the floor? What kind of mileage did your rig with the many steps get? was it more than you expected?
Find one of the old air sensors first castings that had egr provisions. Out of the box will be better than oe tpi pieces, even after thousands of dollars of welding and port work.
Who says you talk too much? I guess nobody told them if you dont have anything nice to say, dont say nothing at all? Who else is doing stuff like this? lol
I really appreciate the knowledge that you share and the experiments that you do.
Thanks!
Flow increase may be due to a slight venturi effect with more stable laminar flow. Another factor could be friction reduction at the boundary layer. That what increases flow on an exhaust port when you add a pipe. I like to leave a .030" difference between port transitions to aid in wet flow management not just anti-reversion.
Don't sweat the haters, you can't please everyone.
I had that conversation with D.V..He asked me first. I said," .030" difference.
@@servediocylinderheads it's sad that so many people malign him when he's just trying to share his massive knowledge base. He seems very misunderstood.
@@servediocylinderheads
Yes, I've always left a 20-30 down step... I think the real reason was that there might be a slight misalignment as to where the parts fit together. I'd rather have a drop off than hit a slight wall.
(Let's not get to the Edelbrock Cleveland thing here, LOL)
@@psychoholicslag4801
DV #1...
I listen and analyze others but in the end DV wins IMO.
Very Interesting! I can't wait to get to do some playing on my flow bench I picked up and start learning.
@@bcbloc02 Sweet!
Air speed makes torque, 300 fps. More velocity means more cylinder fill at the end of the duration.
dont worry too much about seeming long winded. Do you remember geometry "proofs" back in high school? Well, increased understanding in the present gives rise to increased ideas in the future. Tedious yes, but is the price to pay for a possible future breakthrough.
Speaking of the Chevelle, do you have any plans to put it back in action? Street car or drag car? From the glimpses I have caught of it in some of your videos it looks nice and solid.
It is solid, street only. I was working on a 700+ hp engine. I have the heads done but I am broke as always. Thanks
Is the reasoning for better normal flow than reverse flow to keep the pressure gradient going one way?
I'd love to see some thermal dynamics videos, one has some links
would love to see the setup with runners attached, with and without a bit of tape covering the top 25% of the round manifold to curved runner connection as a ledge. you would ideally ramp it with clay to the tape line. On inlet air would see a ramp that pushes some more air towards the outside of the runner radius where it would be biased already but on reversion any air on the roof of the intake manifold would hit a ledge pushing some of the air down 180' away from the turn it has to make in the radius up to the plenum. Then, to prove effect flip the ramp direction and do the same test with the ledge on the bottom with 2 ramp directions as well for 5 test configs taking inlet and reversion flows on each. The large ramp would be test only to prove effect works you wold be likely want
I have a video of some Slover ported bowtie heads I have that are upside down D ports. With some work they flowed very well. Thanks
I would imagine extra anti-reversion steps in the intake would also have a bonus effect of helping to re-atomize any liquid fuel on the floor? What kind of mileage did your rig with the many steps get? was it more than you expected?
383 turbo 400 2800 stall 3.42 gear 17 + mpg 3500 lbs. Fuel injected early 90's
Hey Joe, could you show how you make those cast iron ports look as cast after you port them?
Who is Joe?
@@servediocylinderheads sorry, CHARLIE 🙏
@@shoominati23 I use a completely worn out double cut burr at a specific speed. Thanks
Find one of the old air sensors first castings that had egr provisions. Out of the box will be better than oe tpi pieces, even after thousands of dollars of welding and port work.
Has to look stock... thanks
Who says you talk too much? I guess nobody told them if you dont have anything nice to say, dont say nothing at all? Who else is doing stuff like this? lol
Funny!