banzaitoyota

We know that an engine will run with the front and rear housings swapped, It just won't pass emissions due to certain airports being blocked.

Is it possible to build a quickie junker motor using 2 good front housings?


Search revealed no info...BTW

DaleClark

iTrader: (55)

Yep - I've built many motors with 2 front rotor housings. The ONLY difference is the EGR passageway, that's it. It would probably still pass emissions, though!

Dale

banzaitoyota

thought so. thanks

Sniper_X

Thats scary...
I have just built one with two front housings.

I searched the housings carefully and found no differences.

So I used both. so what are the differences.

DaleClark

iTrader: (55)

Again, just the EGR passageway in the rotor housing - that's it. It's a REAL subtle difference, and only necessary for emissions.

Dale

HAILERS

Ouch. Not fighting anybody here but......The PORT AIR is injected into the front of the front rotor housing and the rear of the rear rotor housing. If you put a front housing where a rear housing goes you cannot inject PORT AIR into the diffuser because there is no hole to a *front*(now rear) housing from the rear. The hole for to the diffuser on a front housing is located on its front side, not the rear. Make sense. Take a look at a front housing and a rear housing.

I'm not saying the motor will not work if you swap housing with each other, just that the emissions will not, cannot work as designed. Not just the egr. Before condeming this post, go take a real life look at the housings and where the hole is for injecting PORT AIR into the housings, then switch their places and you'll see what I mean. Looked at this tooooooo many times and am tooooo familiar with it.

HAILERS

I'll put a front rotor housing on my scanner tonite and take a jpg of the front side of it, then the rear side of it. Might do that, might not have time. Got my DIY 02 wideband meter from Edgetech saturday and I'm supposed to get my sensor for it today sometime. Just bragging.

HAILERS

jpg of front view of front housing: Note there are two holes. The yellow feeds port air to the diffuser. Purple headed to the exaust manifold/deadend

HAILERS

REar view of front housing: note only one hole and its going to the exaust manifold/deadend. NO hole to the diffuser.

banzaitoyota

Thanks Hailers!

HAILERS

Banzi....your welcome. Sorry but the scanner doesn not clearly show the holes. Did it during lunch and did not have time to polish the triangular hole to clearly show the one/two holes and how they do/do not feed the port air to the diffusers.

Swap housings or put one in the place of the other and you'll be lacking air to the diffuser. Not a big deal if you don't have to pass emissions. Ask J-RAT how well swapped housings and passing emissions works! He was one unhappy camper when we found he had the front and rear housings swapped. I think that engine resides in his outhouse now.

banzaitoyota

Tis true, but for those of us with a couple of blown rear rotor motors and no emissions testing.........

HAILERS

BANZI....your home free! Have fun.