I bought this housing, among other engine parts from a local dude a while back for like $10

I was just checking them out randomly and noticed this housing is not in super bad shape save for these two nicks. The one at the bottom of the exhaust port is about 1mm wide at its widest and WAY less than a mm deep (like 1/10th of a mm)

The one above the port is about as wide as that pencil lead (0.7mm) and about 3-4cm long and about the same depth.

I was just curious if this is a usable housing, or could be made usable (porting exhaust, lapping blah blah blah)


Thanks,

-Miles

 

I wouldnt use anything with damage like that

 

personally, the nicks on the housing near the exhaust looks too deep.
You can port the exhaust port downwards and get some of the gash out, but the one above the port, you cant do anything to it. Though porting 3-4cm down.....thats a little extreme.

You can see if Goopy motorsport can refinish the housing. Send them pics and see if their methods can take away that gash
aside from the nicks, the housing looks in good condition.

 

the one on the bottom of the port is only about 4-5mm long the one above is less substantial (more shallow)

 

if you wanted to build a toy/grenade motor, i'd use it.

if you want to build a GOOD engine its junk.

 

Toast.

 

please dont listen to all the retards saying this housing is no good.

I have personally seen housing in this shape in 600+ Hp cars with very good compression. The grove near the exhaust port is not as critical as the leading spark plug area that i can clearly see was not sealing well.

If you send it out for re-freshing it will work just fine.

 

it could work like rotaryB-2000 said, its your car/money/engine/whatever so its just your choice.

I would never use it and I would say you just waste 10 bucks.

simply bcuz ... there is a reason why it cost "10" bucks.

 

goopy can work with that housing... https://www.rx7club.com/showthread.p...ighlight=goopy

 

We would never use a housing in that condition. However there are builders that would.

Scrap aluminum is around $0.60/lb so it is not a total waste, you should be able to get a few $$ back.

 

It's ok to use but it's not the best

 

Thanks for the info guys, I actually picked up like 3 housings and 3 rotors and 3 irons for the ten bucks, I don't feel like I have lost any money on this haha they are cool conversation pieces

 

if it's going into an n/a engine i doubt you will notice any issues, if it was going into a higher boost engine pushing higher than stock turbo power levels, no.

i wouldn't use it in a rebuild but it IS usable. the scuff below the exhaust port makes no difference and i WOULD use a housing on a budget rebuild if it only had that one scuff, the issue is the scuff leading into the intake passage area higher up, which is actually relatively minor. i would go over it with some sandpaper first to deburr the edges however, i would probably reuse it in one of my own personal engines.

everyone has their own personal opinions on what is good and what isn't, i'm giving you my advice as a rotary owner and not from a rebuilders perspective with the tips. because rebuilders have to worry more about engine warranty and comebacks.

 

That looks like a ticking time bomb of an housing, you have to ask yourself, is it worth losing $1200 in a rebuilild kit and labor???

 

i'm just hesitant to call it complete junk because the housing is in such pristine condition. that rotor housing probably has about 50k total miles on it and would make excellent compression. i can't see a single groove or chrome flake anywhere on it.

the smaller groove up high could probably be machined out by some of the shops that do rotor housing milling, like the service Goopy racing offers, one that i still plan on getting set up to do also. at least to the point that it wouldn't affect performance or other issues such as flame bypassing, which is probably not critical in that area anyways as most of it's energy has already been spent.