i still have to do a little more smoothing, but the shape is done and the runners are pretty much done. i have yet to do the runners on the primaries cause i cant get the damn injector atomizer things out that sticks down in the middle of the runner!

 

looks good, but i dont know what looks bad so yeah, nice work

 

thats really smooth man, your going to get good flow out of those. Best porting i've seen in a while.

 

Nice.. Where did you get your bits? I think we need a nice write-up on porting with alot of pictures and maybe a video..

 

i used a really sweet angled (kinda "pointed) carbide burr for the shape of the ports (kinda tricky cause it likes to grab cause its so agressive, gotta have it at the right angle when porting) with a 90* angle dye grinder. and a small sanding bit and a small wire bit for the dremel. you can get the burrs are harbor freight and the dremel stuff and walmart.

i'm gonna go over everything again (after i finish the primaries) and get another level of smoothness. i've got plenty of time before my mazda apex seals get here so we're doin it up nice i'll post the pics of the exhaust ports later.

 

Cool

 

doin the primaries tonight, exhaust tomorrow.
i'm scared of the exhaust ports.

WISH ME LUCK

 

unfortunately porting is a good way to get alot of power out of an engine and alot of engine builders/tuners know it. so its kinda hard to get some concrete knowledge and ideas and pictures to explain it because everybody has their own way of doing it. unfortunately the "way" everybody has is usually pretty private.

 

Man I agree, this is the best porting that I've seen in a while as well.

Curious though, with the larger intake parts where the LIM mates up with the irons, whats the point with that? I really doubt that you're going to port the LIM and UIM for the TII to match that port job, are you? Or are you just gonna use an FD LIM or something? As far as I remember, that was the only reason why the FD LIM would not fit was becuase the ports were too large.
anyone know anything more?

 

yeah, them ports are soo smooth, the air is gonna flow thru there sooo nice, u got some porting talent for shure

 

ehh, i'm not exactly done with em yet, but thanks!

also, FD LIM doesnt bolt up because the FD irons are different, the secondary port inlets are scooted over about a half inch and the LIM bolts up to the irons differently too.

hopefully i'll finish my primaries and post the pictures of them tomorrow. they're prettier

 

 

got the primaries done tonight, damn they are a royal pain in the ***. the runners are too long and narrow to use any dremel bits, so they arent as well done as the primaries are

i also did one of the exhaust ports tonight... and polished the entire exit, it looks awesome. i still have some cleaning up to do of the rotor side of the port, but it looks pretty good! i'll post up some pics tomorrow.



theres one of the primaries before i did the runners and smoothing...

 

looks good so far keep up the nice work could you get a pic of the bits you used to smooth it all out

 

yeah, them ports are looking really nice, and i like your garage, i wish i had that many rotor housings!!!!!

 

Gonna build a 5 rotor in the pic eh?

Smooth ports!

 

thanks my brethren.

 

 

Remember to bevel those exhaust ports

 

Like it matters... cartmill blows up engines well before the time they'd actually wear out or kill themselves!

 

Hey , nice porting job. Louisville, ky resident here also. Wish there were more people in this area interested the Rx-7.

 

i'm using the stock bevel.

and i'm not really done with the primaries, i have to find a bit long enough to reach through those long *** runners

 

Looks nice!

What templates are you using?

 

I don't see the bevel on the lower part of the exhaust port, you sure you didn't grind it away? Or just a bad angle?

 

hi there,
my name is achilles and I have an '88-7. The motor in it went out at 198k miles and I went to the junk-yard to get another one to drive in the main time until I can put some money together to but a new engine. I am done with the engine swap but for some reason the car would not stay running. It cranks and then dies after about 5-10 seconds of starting. I have tested for spark, fuel, compression, timing, and then some and still cannot find out what is wrong. can you please help me out with some suggestions?

8's,
achilles.