JHB cermet coated housings (pics)

-xlr8planet- · 03-06-2008, 01:14 PM

This 12a housings seem to be from a 79 or 80 engine right? Mine is 81 and Im not familiar with these. I know I should plug the holes for gas recirculation, but... should I remove the sleeve? Im not sure how to port these.

It also got the half moon on the spark plugs... I will have to grind that down

Any input is welcome

rx7carl · 03-06-2008, 10:13 PM

Shrouded spark plug holes and lack of thermal reactor ports in the exhaust housing suggest its a later model, 83-85 IIRC.

Are you planning on porting them? Only remove the sleeve if your going for a really aggressive porting (race only).

-xlr8planet- · 03-07-2008, 09:34 AM

Really? I was sure it was the other way around!

Im going with a street port, I think I wont remove them

charlies7 · 03-07-2008, 10:57 AM

Ive always wanted to try the JHB housings..I just get mixed reviews, maybe when I build my spare engine...

rx7carl · 03-09-2008, 02:17 PM

Quote:

Originally Posted by -xlr8planet-

Really? I was sure it was the other way around!

Im going with a street port, I think I wont remove them

Look in the RB catalog/tech tips.

Then dont remove them. Not for a streetport.

warwickben · 03-10-2008, 04:17 PM

can you pm me the cost you paid for 2.

03-06-2008, 01:14 PM	#1
-xlr8planet- RCC Contributor Join Date: Feb 2008 Location: Buenos Aires, Argentina Posts: 679 Rep Power: 18	JHB cermet coated housings (pics) This 12a housings seem to be from a 79 or 80 engine right? Mine is 81 and Im not familiar with these. I know I should plug the holes for gas recirculation, but... should I remove the sleeve? Im not sure how to port these. It also got the half moon on the spark plugs... I will have to grind that down Any input is welcome __________________ www.rx7club.com.ar RX-7 Forum in Spanish I make custom decals. Yes, you can ask me

03-06-2008, 10:13 PM	#2
rx7carl Rotary Fan in Training Join Date: Mar 2008 Location: Orlando, Fl Posts: 59 Rep Power: 18	Shrouded spark plug holes and lack of thermal reactor ports in the exhaust housing suggest its a later model, 83-85 IIRC. Are you planning on porting them? Only remove the sleeve if your going for a really aggressive porting (race only). __________________ www.pbandjracing.com

03-07-2008, 09:34 AM	#3
-xlr8planet- RCC Contributor Join Date: Feb 2008 Location: Buenos Aires, Argentina Posts: 679 Rep Power: 18	Really? I was sure it was the other way around! Im going with a street port, I think I wont remove them __________________ www.rx7club.com.ar RX-7 Forum in Spanish I make custom decals. Yes, you can ask me

03-07-2008, 10:57 AM	#4
charlies7 one broke moderator Join Date: Feb 2008 Location: Chicago Posts: 319 Rep Power: 18	Ive always wanted to try the JHB housings..I just get mixed reviews, maybe when I build my spare engine...

03-10-2008, 04:17 PM	#6
warwickben sa rat rod Join Date: Mar 2008 Location: tewksbury ma Posts: 408 Rep Power: 18	can you pm me the cost you paid for 2.