HAILERS

I need someone to take digital photos of the front and rear rotor housings for a show and tell. I need a shot of the exaust ports and another of where the rear housing mates with the rear rotor housing. Its to help me explain to J-RAT what is happening with his car. Thank you.

Samps

Pineapple racings web site has a few good shots of housings. You can click on most of the pics to blow them up preaty big.

http://www.pineappleracing.com/ProdSvcs.html

Samps

nevermind, I guess you cant blow most of them up.

mazdaspeed7

Ill get some pics up in a little while.

HAILERS

THANK YOU, THANK YOU MAZDASPEED7. What I'm wanting to show is a shot of the exaust port with the two small holes under it. And a shot of the rear mating surface of each rotor. In specific, at the bottom right side of the engine, is a triangular shaped hole, and inside this hole is two holes for the rear rotor but only one hole inside this triangular hole for the front housing. Its to show why one should not put a front housing in the rear and vice versa. Thank you.

peejay

If being emissions-friendly isn't a concern, just plug those off and it doesn't matter.

mazdaspeed7

This is a 90 non-turbo engine. Hope its what you want, if not let me know, and Ill go take some more pics.

J-Rat

iTrader: (2)

Mazdaspeed7, I think what we need is an exterior shot. What he is trying to prove to me is that there are 2 different housings for the 13b. Obviously one for the front, and one for the back... My front rotor housing is stamped "R" and my rear is stamped "F"

peejay - trust me....we wouldnt be having this discussion if emissions werent the PRIMARY reason!!!

RX-7Impreza

im telling you its a type R

Justin

J-Rat

iTrader: (2)

and the rear one is a type f? cause its got an f on it???

rxse7en

Just replace the pistons, DUH!

RX-7Impreza

hmmmm. yeah i thinkthat type f was a prototype that never made it in the market i think it is prolly good for another 100 hp



Justin

HAILERS

See the pic called REAR ROTOR/ REAR ENGINE PLATE????? See the triangular hole, sort of rounded off at the triangular ends??? The air passes thru the triangular hole on the REAR ENGINE PLATE, into the triangular hole on the REAR ROTOR. Now if it were possible, can you focus straight on the triangular hole on the REAR ROTOR, and maybe put a piece of wire thru the two holes that are inside that triangular hole??? Please. And a shot of that housing, looking straight into the exaust port. I want to show the two holes below the large hole. This is a six port engine??? I forgot to look

J-Rat

iTrader: (2)

Okay kiddies, this is a SERIOUS question! I am looking at a MAJOR pain in the *** problem here....

HAILERS

MAZDASPEED7..... Darn, they are different than the 86-88. I just looked at http://www.mazdatrix.com/e6.htm and by looking at the exaust gaskets I can see that the 90 does not have the hole in the gasket undet the rear exaust port. See item E for the 86=88 and compare to the 90. Thanks anyway.
And Peejay...emissions is his concern. Thats why he is going thru this exercise. The Mazda company did not rebuild the engine right. No where in his bill of sale did it say *We kinda rebuilt it right but just did not know how to do it right, hope you can somehow pass emissions due to our lack of talent. We're gonna charge you just as much as if it were done right*. No, they forgot to include that in the bill of sale. On the other hand maybe someone needs to tell them that they are making mistakes so they can correct the problem. Chances are someone there cares about a quality product.

mazdaspeed7

Hailers, the engine is a S5 non-turbo engine, so it is a 6 port engine. Please gice me a little more info on J-rats engine, I think mine might be different enough to make your explanation not work on my engine. Ill have the pics up in a few minutes. You want a close up of the air port in the end housing, and looking down the exhaust port to see the 2 holes, right?

J-Rat

iTrader: (2)

My motor is a 4 series 6-port N/A....86-88.

rat

HAILERS

Yes! Thanks. The difference in the housings is that the 87 has two half inch dia holes directly below the large exaust hole. Those half inch holes were used for the EGR valve on a 87. The 90 must have either no EGR valve or a different method of handling that. We want the pictures, but you can't show how the rear rotor housing has two holes inside the triangular hole, because the 90's evidently do not have those holes.
Question: does a 90 have a EGR valve????

mazdaspeed7

They are different, but heres a few more pics. The difference is only on the outside pair of ports. On a S4, they route air from the ACV to the exhaust manifold, where its injected into the exhaust stream. My engine has all of the provisions for this, except the exhaust manifold, so you will still be able to explain it.

First pic, air from the air pump goes through the ACV, into the intake manifold, and into the top hole, where it travels down through the tube in the side housing, goes into the rotor housing, and into the exhaust manifold to be injected into the exhaust stream.


Second pic, I didnt mark it in the pic, but theres a hole in the back corner, where air goes to the exhaust manifold to be injected into the exhaust stream. Notice there is no hole into the actual exhaust port on this side.


Third pic, This shows the other side of the same rotor housing. Of the 2 hoels on the outside of the housing, the far one(no arrow) is there air goes from the air pump goes into the exhaust manifold from the rotor housing. On the near side, exhaust gas enters from the port in the exhaust port, and goes into the center housing for the EGR(on a S4). On an S5, the exhaust gas goes into the ACV, but I dont know for what.

Last pic, this is the exhaust ports from the outside. I marked the 2 holes in each exhaust port. The inside ports go to the EGR or ACV, depending on series. The outside ports are not used to my knowledge. On the outside of the rotor housing, the outside ports are for the air from the air pump going into the exhaust manifold, and I am pretty sure the center ports are blocked off by the exhaust manifold.

mazdaspeed7

BTW, S5 does not have EGR, and the center housing doesnt have the hole in the top for it, but other than that, all of the air ports and such are the same as the S4 engine.

BTW, hows that for an explanation?

HAILERS

MAZDASPEED7 What I was trying to show is if the front rotor housing was put in place of the rear housing , then the following would happen in your first picture. The acv air would go thru the rectangular hole, down the tube inside the rear housing, out the triangular hole, into what now is the front housing in lieu of the rear housing, and then it cannot go into the large exaust hole with the diffuser looking thing in it. There is no passage for it to do so. The only passage is one of those half inch holes and they are blocked by the exaust gasket on a series four. Did that make sense????? His housings are swapped. Front in rear and Rear in front. The air cannot enter the exaust port because there is no hole for it to enter. There is a hole for it to enter only if the correct housing is in the correct place. The bottom pic was as clear as a person could want. The top pic is a bit out of focus. I understood because I have one sitting in front of me, but J-Rat has his engine put together. Thank you.
EDIT: by the way, does not your exaust gasket cover up the four small holes on your series five. On the series four, all but one of the small holes is covered. The fwd one on the rear housing.

1FastT2

iTrader: (1)

Heres one I took while building my engine.

1FastT2

iTrader: (1)

I have more if anyone needs them.

HAILERS

First picture: air from acv goes in the red arrow, out the yellow hole. Thats a rear side housing.
Second picture: There should be two holes in that triangular hole if that is the rear housing. One hole should go to the exaust manifold. The other hole should have been in sight at the top of the triangular hole, and should have led to the exaust port with the diffuser. Your picture and dialogue do not reflect that. Will you double check, please?
1FAST TURBOII thanks for the offer. What we're trying to show is the holes inside the triangular area where the rear side housing and the rear rotor housing meet . We're almost there. Thanks

J-Rat

iTrader: (2)

Okey dokey...here is the deal....Well, first off, I want to thank you guys for all the help!!

Okay, the motor was rebuilt at "Mazda Recycling" in Rancho Cordoba. NOT by the dealer as originall told. I am in the process of trying to rectify this situation with them, but I have the feeling that they arent going to be very cooperative. But, you never know.. We do know that the front and rear housings on 86-88s are different housings. And it seems to me that nobody knows about this. Did I miss something? THis seems to be a MAJOR part of the engine rebuild...Lets see what the Haynes manual says..Shall we?

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