Wow, I didn't realize that I typed that much. I just got going and kept my fingers flowing out my thoughts as fast as I could!

With that out of the way, here is how I made the templates which will allow me to get my ports the same on both plates:



Port shape cut out:



Here is how my stock port looks with the template over it:

 

Magnificent. Looks lke you kinda fubar'd the auxs.

What sort of engineering are you going for. I start classes for mechanical engineering this sept. I can't wait to actually be taught how to make stuff like this work better, the right way.

 

Mechanical myself at Oregon State U in a month and a half. I can't wait! I get to quit my dead end mill job then. Yeah the templates are a little rough.

 

I am just curious as to how soon all of this is going together. all I need is one more rotor and I'm set. Honestly its hard to keep from pissing myself because of the anticipation. It must be worse for you. Its been how long since you last drove it?

 

I find people on the Engine Building/Porting forum over at nopistons is a lot better for this type of stuff.... But still good for reference material here.

 

Yea there is more infomation there, but we need to start to bring it here. I don't mind going there, but I am here more often.

 

I should have it together again in a month or two. It has been almost a year since I drove it. It makes me want to cry when I sit in it and remember how it felt to drive a tight FC. The sound of the door closing brings back the memory of the starter turning over the rotary and how the clutched fan would come on in a few seconds after the engine started humming.



It's not so bad. It will be much better this time around, and I did it all myself.

 

Amen, I'm gonna have the same feeling as you 88 . But I did get a small fix though since my friend bought and FC about 2 1/2 weeks ago so I get to drive and work on that one. Can't wait til my baby is all set though...it's just not the same (I really need to fix his aux ports though...top end is hurting). It's been about a year now for me too .

 

Nice job man

How about uploading a fullsize template to this thread, for us poor guys to print out
Check out this thread for hitech TB answers!
https://www.rx7club.com/forum/showth...highlight=fcon

 

Hey I forgot about that thread, thanks Kim.

 

Here is a close up of the sixth port. I got a scratch on the plate in the corner seal track but it should work, so I might use this plate in the engine depending on whether or not I can find a compete S5 na core engine to play with.





I like taking close ups because it is easier to see the flaws in the ports on a screen than in person with a grinder in hand. I still have some smoothing to do in the roofs of the ports and on a couple of places in the walls and corners of the bowls. Whoever said that a street port takes only an hour a port was pretty good at porting. I have about three to four hours on this plate, but I had to smooth and grind the sleeve insert for the sixth port which took some time.

Now everyone go buy a dremel and junk housing and start grinding!

 

If I had the cash I'd already be porting . I wish I had a stockpile of "irons" to practice/experiment on...that and a dyno to see what works also (or at least a flowbench).

 

Feel free to keep snapping away with the pictures though! It's nice to study other peoples designs and ideas. To me porting is the most interesting thing in the world...followed by exhaust design.

 

It's great to see this thread growing. Hopefully I'll get some pics posted soon.

Nice job on the aux. port. You went bigger than I thought you did.

 

Here is a shot of the results of today's playing around inside the new style primary port that I did earlier:



I tried to cup the inside of the bowl under the roof and along the oil seal track so as to direct air up and over the ramp that the shot is looking down on. When I blow through this port, air goes up and out it over the ramp, just like I wanted. The bottom opening of this port is the stock primary port's bottom curve with a lot of shaping done under it in the roof of the port.

Compered to my first primary port (the one in my sig) this port flows air out faster and more upward when I blow through it.

Porting is addictive. And yes, I scratched up the plate pretty badly when I was first shaping the roof of the port and didn't watch where my grinding stone was. It jumped right out of the port!

 

An hour with a die grinder is way way way way way different than an hour with a dremmel I hope you're wearing a dust mask.. hehe.

 

yeah, props on doing it with a dremel. I ported mine with one and it was hell, next to impossible not to just gouge ruts.

Also, when youre porting, try covering everything around the port with duct tape, it helps protect the housing from slip ups.

 

I can't handle the power and fast cutting of a die grinder. That is why I don't use carbide bits either. I have to go slowly or I lose my stream of creative energy that shapes the port. It is as if I become one with the shape of the future port and free it from the stock iron housing using the stones. And the die grinder is louder so I lose my meditative state of mind.

 

Hi Kim,

I could take a snapshot of my templates over the stock ports so you could just draw the shape of my port openings on your housings. I don't have a scanner and my port shapes are kind of untested. But I like them!

 

what is there to be done on the exhaust ports in the 13Bs? I know in the NAs dont yall have some sort of restriction? Some sort of diffuser piece? I'm trying to take as much of this in as possible I'm just curious as what to do with the exhaust ports.

 

Exhaust porting is pretty important and I have yet to do my grinding on my exhaust ports. There are steel sleeves which cover the aluminum rotor housings and keep the exhaust temps from getting to the coolant. This sleeve can be removed and the exhaust port can be shaped and then ceramic coated. As a general rule, taking the opening of the exhaust port down 2mm or so from stock and not taking it up or making it wider is the consensus I have found for a standard street port.

You can also leave in the sleeve and get TII sleeves to replace the NA ones which have a "diffuser". You can port the sleeves. A smaller exhaust port give greater exhaust gas velocity compared to no sleeve, which means a little more low end torque but less top end.

Any kind of exhaust porting will make the engine louder. Having a header doesn't help, either. I want my car to be sort of quiet and I don't yet know how I am going to go about dealing with exhaust porting. I may just remove the NA sleeves, attempt to grind / cut out the diffusers and port the remaining sleeve a tad, whle taking down the exhaust port opening 2mm and blending it all to be smooth.

 

I did mine with a dremel and a tungsten carbide bit. I thought it went pretty smooth. No way I would think about using a die grinder. Just way too much for me. I would be more worried about that thing getting loose and running across the housing than porting it. dremels are slowere, but that just gives you more time to think about what your doing.

 

Today I began porting the front endplate to match the rear. Here is the template I made, over the stock ports:



I scribed the template shape over painted-on white-out and taped around the port to protect from a stray grinding bit:



Here was how it looked after about 10 minutes of dremel grinding:



. . . After about 30 minutes:

 

And finally, after about an hour:





All that remains is to polish off the port and do the sleeve. I'll show how I port the sleeve in my next installment of "porting practice".

 

Nice work, my friend!