EjCabrera

iTrader: (4)

i'm going to order the cermet b housings from jhb in the next few days and i have a few thoughts on them. i want my engine to be street ported so do you guys think its possible to port the cermet b housings or should they be ported then coated. because if you port them when theyre already coated there will be that area where its not covered anymore. am i wrong or is it possible.

EjCabrera

iTrader: (4)

bump anyone?

MazdaSpeedDemon

Better safe then sorry IMO.

You should get the porting done then get the coating done.

EjCabrera

iTrader: (4)

yeah being safe then sorry is better. does anybody else have any opinion on this? any would be greatly appreciated.

Mahjik

iTrader: (1)

It should be fine either way. Cermet has to be strong enough to have seals grinding on it so porting it after the fact should be fine.

So, if you are using Cermet, are you also using ceramic seals?

Herblenny

iTrader: (13)

I always wonder about this Cermet stuff.. So, isn't the coating couple of mm thick?? I've talked to someone who's an aerospace eng. and he said he has seen these things chip. I know there are few threads about this stuff, but I think if you are going to spend money on this coating, its better spend few more and get a new housing.

EjCabrera

iTrader: (4)

yup herblenny i'm going for the new housings with cermet b option. as for the ceramic apex seals i emailed the jhb guy and he said that i should use ceramic apex seals to compensate for the hardness of the cermet b. as for porting i thought it would be fine but does anybody have any input who has already done this. thanks for your guys input

Herblenny

iTrader: (13)

Its your choice but I think its a complete waste to get a new housing to be cermet'd.

By what I hear, they strip the steel insert for the housing and coats it.
And I can't see them like the oem ones..



I've also talked to Ianetti and asked about the ceramic seals.. He does not recommend his ceramic seals on street driven cars. That was quite surprising to me..

Its up to you, but there have been plenty of people making great power on stock seals and stock housings..

Mahjik

iTrader: (1)

You already had a thread of people who have used the Cermet coated housings:

https://www.rx7club.com/rotary-car-performance-77/cermet-b-rotor-housings-regular-housings-552487/

Why not PM a few of them as ask them?

EjCabrera

iTrader: (4)

thanks for you guys feedback. i also talked to mazdatrix and they had a bad experience with the cermet b and ceramic seals. i read around the forums and was persuaded to go the new housings then street port them and oem 2mm apex seal option.

fdbabb

1.) I am considering this for some engine in the future. I talked to Mark @ JHB while at SS7 & 8, I also talked to him on the phone a couple of times. Very straight forward guy about what prices are, whats overkill for the street, etc.

He told me they remove .009 and if I bought new housings, he'd just be taking that nice new chrome surface off.

If ya send him housings that have .009 deep worth of gouging on the surface (or more), obviously he'll be machining it out smooth as a baby's butt in prep for the Cermet, but I don't know/remember what the maximum material removal allowed is (if you have deeper gouging > .009 in the housing..... like me that is!!! ;-) ).

2.) Talked to Jim at Moriah Motorsports and he swore by Ianettis. Wonder why the Ianetti guy nixed the street app for his ceramic seals.

3.) QUESTION : Anybody had experience with Swaintech thermal coatings on the rotor faces? Do you have to prep the rotors by covering up the apex groove or are they savvy enuf about rotary engines not to coat the inside of the groove?

Mahjik

iTrader: (1)

You don't need to cover any grooves, but you do need to clean the rotor to the best of your ability. It doesn't have to be spotless, but it does need to be semi-clean and they'll take care of the rest. If you just send them a dirty rotor, you'll get charged for them cleaning it.