Got the package with my TII rotor housings today.
I have to say that I am quite happy with the
quality of the finish and am looking forward to running these
like new rotor housings.
I opted for the lower cost Cermet B coating.
After a close look at the housings I see that they have been nicely cleaned up
on the out side as well as the coolant passages.
The spark plug holes appear to have been chased with a tap and
lubed with something, spark plugs turned in easily by finger.
The oil injection holes look like they might be a little plugged with
grindings and when i tried to blow through them i couldn't
I would assume that when i do a final wash in the varsol tank and
blow them out with compressed air they will be cleared.
I have attached a couple pics of the finish which looks great even appears to
have a slight crosshatch pattern on them.
Ok now that all the good things are said, me being the extremely fussy
s.o.b. that i am i will point out a couple minor imperfections
next to the exhaust there is a very small spot void of coating
and on the other housing just bellow the spark plug area there is another spot.
these little imperfections should in no way affect performance or anything else
for that matter, I am just pointing out what i see.
look at the attached pics and judge for yourself.
later
matt

 

first pic shows a small nick which is really minor
the 2nd pic looks much worst in the picture it is only about 1/8 " long
you can tell by counting the fingers how long it is.
3rd pic looks looks to be a deep nick buts about the thickness of paper
deep and small in size.
matt

 

Two more showing the finish of the surface around the plug holes.
I wish now i had before pics because these housings were really bad to start with.

 

Looks great. How much did they charge you?

 

their prices are listed on their web site.
matt

 

That much eh?

But it does look good...

What is the deal with the nicks?

Was that there before you sent them the rotors?

James

 

these housings were grooved up bad they were unusable before i sent them
in to be done.
I just hope they last time will tell i guess.
I plan on running ceramic apex seals with these housings.
matt

 

Now - What was the turn around time from JHB?

 

I told them that i was in no rush, so it took a few weeks.
for faster service i think they have resurfaced ones on hand to do quick turn round.
matt

 

How rough is the surface, it looks very rough from the pics.
Can you run a dial indicator over the surface and post variance?

And from the pics it look like there are a lot of inconsistencys in the surface, I mean I know you are taking pics of the bad spots, but there are other spots that look to be problem areas just in the pics you posted.

 

I dont have time at the moment but i will set it up in the lathe and take some dial
gauge readings in the next couple days...
the pics make it look rough but to the touch it feels perfect.

matt

 

made some measurements and the surface is very smooth.
more info later
matt

 

About time that somebody started offering housing surface renewing services, this is what, 40 years after the first rotary came out? Good news for those folks with L10 engines and the like (any Cosmonauts in here?). Anyways, if they work as good as JHB advertise them, they might become a genuine alternative to new parts, as they imply that their product should be longer lasting than new parts.

 

Hey Matt, how are things going? any more update on this?

 

Its a ongoing saga and I will post a full report when its all said and done.

this is all i will say for now.

should have an update in a couple weeks, hopefully with lots of positive feedback.
later
matt

 

We have our fingers crossed tight. I think they will work better and last longer than stock. It is money very well spent. You spent less than a new set of housings and they will probably be better.
It is also good to know these are being tested by a seasoned person than somebody that may be putting together their first motor. This makes the results and feedback much more fair to JHB. We know the motor will be built right

 

Looks like it could be a little longer than expected so i will post a little update.
Ok for those who were wondering what the above post was about,
I made some measurements of the housings at i had resurfaced, (as shown in the
picture I posted) I found a slight imperfection in the finish of the surface (I am sure
that the apex seals would have eventually matched the imperfection) but I
thought i would let JHB respond to what i found before posting anything.
I since have returned the housings to JHB and I have been told that they will
fix the problem. marc is being very professional about this and that I will have my
housings back done right at no extra cost to me.
Since I am in no rush this is not a problem for me, but for someone who might
have wanted this work done asap they might have been a little more upset,
but i am sure in that case marc would have had exchange sets ready to go.
matt

 

I hope they are better, because i am sure there will come a day when housings
for even the 2nd gens will be no longer available.
matt

 

The surface looks horrible.New housings have a dull grey finish,and look ever so smooth,so why does the ceramic look so rough.Point is,being ceramic,it is probably going to stay that way.Guess I will know soon,as I get back my 12A turbo housings,cermet A coated.

 

its not ceramic.
and I will have to take better pictures when i get them back
matt

 

What is the coating then?

 

I would assume its a spray weld product of some kind.
but i am just going by what it looked like, i really cant say for sure.
matt

 

It is either plasma or twin wire spray. Probably plasma.

 

whats the website? where do you send these?

 

http://www.jhbperformance.com/products/rotorhousing.php