alritzer

Does anybody know who I can send my end irons to to have them ported correctly? I need the front and rear irons ported or at least checked to see if they are ported correctly.

ash

tuscanidream

iTrader: (6)

Lots of people do! Rotary Ressurection, Pineapple Racing, Mazdatrix (large banner probably at bottom of this page)... and more! I personally am having smg944 do mine who is local for me.

RotaryEvolution

iTrader: (30)

does using a chisel count?

Turblown

iTrader: (12)

Just post the photos if you want them " checked "

PvillKnight7

iTrader: (16)

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/re-do-my-100-mile-rebuild-979407/

alritzer

The rear intake port was enlarged by the previous owner. I tried to copy the porting to the front port but I'm not sure if the rear port was even done correctly to start with since the PO messed up the primary intake port and the front intake port.

Her are the pics:


Any input will appreciated.
Ash

Turblown

iTrader: (12)

Its hard to say, but my gut feeling says its might clip a seal. You need to make a plexiglass replica and check it with a rotor/housings/shaft assembly to look at sideseal/corner seal travel path.

PvillKnight7

iTrader: (16)

The port face is only half the port job. You need to work the port tunnel to match the new port face. It should have a nice ramp shape towards the opening and closing sides.



What you need to do is put the plexiglass in place and trace the side seal path. The end of the side seal has to be supported. If the end passes over the port unsupported it will drop into the port and crash into the top edge.

GoodfellaFD3S

iTrader: (213)

I mentioned it in your other thread, I'm pretty sure those irons are completely trashed thanks to the past person who had no clue what they were doing.

I'd pick up a nice set of used stock port irons and send out to one of the many reputable shops out there..... I just finished porting a set of irons with our Stage 3/single turbo streetport that're going in an engine destined for Washington state

alritzer

OK, I can try to check the path with plexiglass.
So, you are thinking that the distance between the intake port and the water seal has been cut back too much? Or, that the port is just too long?

alritzer

I don't think the irons I posted in the other thread were these irons. I bought a front and mid from somebody on here. Geez, I've changed different irons several times. I'd have to go back and see what I actually purchased.

Getting another set of irons is surely an option. I have so much money in this 7 now that a couple of more irons won't matter much.
Be nice if I could find somebody that has a set that could also do the porting. Shipping cost just add up so fast. At some point, I'll just have to give up on this engine.

dwb87

iTrader: (22)

You shouldn't give up. This will all be worth it in the end... I've spent way too much money on my build. And that has a lot to do with cutting corners, lack of patience, and just plain ******* around.

You should have possibly sent the irons out to be ported in the first place. You're located in West Virginia... See if Goodfella will port them up in New Jersey, or even Rotary Resurrection down in Tennessee. I am sure you could always find someone closer if you're worried about shipping costs.

alritzer

Yes, definitely should have sent them out to start with. Thanks for the names. I'll see what the shipping would be to them.

alritzer

I was told that the engine had been rebuilt by a rotary shop in FL that's the reason I didn't ship them out to start with. I just assumed that the porting was done correctly. I've had this engine entirely installed in the 7 twice already. If I every get it re-built and put back in that will the third time I've installed it.

The original porting was crap so I bought a set of irons on here and then one of them proved to be cracked, after I had already installed the engine.

PvillKnight7

iTrader: (16)

Use the plexiglass, trace the side seal paths, and see the porting limits. The secondary port you showed in the picture looks like the opening edge (side closest to the water jacket) might be wrong. It looks like the port opens too early. The distance between the water jacket and the opening edge of the port is not large enough. The trailing side seal might be unsupported towards the top of the port. Also, the top of the port might be at the wrong angle. The top of the port should be shaped so that the leading side seal crosses in increments and not all at once. This lets the side seal move into the groove on the rotor smoothly. If you use a piece of plexiglass you can see that part of the leading side seal crosses the port unsupported. You can see this in the picture I posted. That black line doesn't touch the red all the time. For part of the time the leading side seal is just hanging across the port face. The red is actually all inside the port face.

Cut a hole in a piece of plexiglass for the e-shaft. Cut two smaller holes for the dowels. Trace the port face onto the plexiglass and cut it out. Half assemble the engine like in the picture I posted and rotate the engine. Watch how the sideseals pass over the port face. Trace them with a pen or marker. The leading side seal must pass over the top of the port with a "scissor" action. The trailing side seal must be supported at all times. These two things are very important.

dwb87

iTrader: (22)

Sounds like you're just having some bad luck... Especially with the people you've been dealing with. I understand it will be the third time having it completely installed, but giving up is too easy. You're learning, right? Even if it is the hard way... You're learning. I've learned the hard way myself. You'll get it...

RotaryEvolution

iTrader: (30)

unfortunately a fair amount of turbo irons have been molested by now, by people who should never touch a dremel in their life. it's seriously not that difficult to cut a straight line yet i see people challenged with this constantly, tweakers suck.

arad99

iTrader: (2)

Find a street porting template and see if your port is within the template limits.

alritzer

I tried to find a street port template from somebody reputable but no luck. So I ordered a new one from racing beat. I'll check the intake ports with the template. If they aren't totally messed up I'll ship them out for street porting.
If they are really messed up I'll probably just replace the two irons and go with OEM porting.

dwb87

iTrader: (22)

If you're ordering a street port template... Then why wouldn't you use it to port with, instead of just checking port work? Have you no trust in your abilities??

alritzer

Exactly, I'm not a mechanic and I can't keep buying irons to practice on.

alritzer

If the porting isn't already completely messed up, I think I will attempt to do the porting myself. Sounds like a perfect learning opportunity but I'll also have to know when to quit and call in the professionals. Good iron are getting harder to find and costing more.



MERRY CHRISTMAS TO ALL




ashley