buzzb87

iTrader: (3)

This is my first rebuild and first port job (pineapple medium street port), requesting the porting gods to take a look and let me know how these secondary ports look for correctness and symmetry, and also what I can do to improve them and my future porting of the primary ports and exhaust ports. I think I need to make the front iron port a bit more round on the bottom to better match the other. Thank you!

djSL

iTrader: (5)

Iron on the right seems a little rough on the edges compared to the port on the left. Other than that, they are pretty decent. I've seen MUCH worse.

buzzb87

iTrader: (3)

Thanks for looking djSL. I think the picture makes it look worse than it actually is, but yeah I need to clean that up.

gxl90rx7

iTrader: (1)

i would bolt a housing up and using a rotor, see if side seals catch the port on their way around. usually not a problem if the top of the port is straight and tight corners. if you look at a factory port, the outer top corner is really sharp to prevent side seal from catching

buzzb87

iTrader: (3)

So I cleaned up the outer piece and made the bottom of the one more round to match the other. Per gxl90rxy's advice, I also put a side housing on it and a rotor with the side seal to see if the side seal got stuck on the outer top corner or the top horizontal part, and it slid across without any problems. Here are some more pics of them, take two. Thanks for the input!

buzzb87

iTrader: (3)

More pics

djSL

iTrader: (5)

Much better! I've seen some port jobs that looked like crazy eyes just eyeballed it.

FelixIsGod29X

iTrader: (50)

That's a pretty solid first port job. Got the shape right, ported the bowl of it too. Well done mang!

buzzb87

iTrader: (3)

Thx Felix!

buzzb87

iTrader: (3)

I think the primary intake ports turned out alright. I hosed up the top edge radius to the face of the iron a bit, and took too much off. Other than that I'm pretty happy with them. Let me know what you guys think, and if I need to fix anything. Thx

gxl90rx7

iTrader: (1)

https://www.rx7club.com/single-turbo...0/#post9629357

buzzb87

iTrader: (3)

glx90rx7, thanks for the link. Pardon my slowness, but I'm trying to make sense of what you posted earlier in this thread, which I believe you are talking about the upper outer edge of the port: "top of the port is straight and tight corners," vs. what Blue TII said in the linked post and picture with the green line for the horizontal side seal stating: "That must have scissor action and a bevel if allowed to leave housing surface," and about the upper outer corner, "any material left here like this will cause sideseal wear damage or breaking as the top of the side seal hits it." Does the horizontal side seal move from inside to outside and the tip could hit that upper outer corner, and if not beveled there, the sideseal tip could hit that and break? If so, is the recommendation to bevel that upper outer corner with a good radius like the upper horizontal part of the port? Thx

gxl90rx7

iTrader: (1)

the scissor action is more important for the side seal sliding parallel to the top of the port. people bevel to helping preventing side seal hangups, especially the tip of the side seal sliding perpendicular to the top of the port. but im not sure how useful beveling is.. the factory ports are not beveled, but i dont think they leave the side seal tip exposed to the port, but i am not sure on that.. never actually checked it my self. I do know the scissor action is necessary though

this is why im not a big fan of porting, you really have to know what you are doing. i would rather just run more boost. ive seen a few hobby builders do crazy porting and then have no idea why side seals are breaking

buzzb87

iTrader: (3)

gxl90rx7, thanks for the reply. I've done some more research, and think I finally understand the, "scissor action," please correct me if I'm wrong. So the scissor action is the lifting of the side seal on the leading edge of the rotor as it closes the intake port, if the intake port has been ported out to allow the intake opening to happen earlier than standard. So if I left the outer edge of the port (the opening edge), standard, then I don't really need to worry about the ramp up on the closing edge for the scissor action. I did go ahead and provide the ramp up for the scissor action, based on reading this article (FC3S Pro v2.0:&nbsp Tips 'N Tricks - Judge Ito Side Seal Clearancing), however I thought I was doing it for the side seal traveling perpendicular with the rotor direction. So, do you think that ramp looks okay, based on the latest pics? Thanks!

buzzb87

iTrader: (3)

Finally finished the exhaust ports, I think they turned out pretty well.