I am currently rebulding my SE and found that the chrome on the housings are chipping off. Atkins has some used jspec housings that I am looking to get since it would be hard for me to afford new ones. How do you think that these will affect power (positive or negative) ?
My setup is totally stock, BTW.

Kent

 

they should work fine but i have never seen a 13b 6 port motor that was a j-spec model! make sure they know your motor is a 84/85 model!!!

 

yeah they couldnt be j-spec SE housings because the SE never came out in japan.

They got the 12a turbo instead.

 

Yeah, I made sure that he knew that it was for an 84 SE. I also double checked with him to make sure that the water seals are in the rotor housings (like the 84/85 13b) and not in the side housings like later models. I am only buying the rotor housings and will be using the side housings that I currently have, so I will still be setup with 6 ports. He said that the jspec exhust ports are a bit smaller, but I don't think that will be a problem since I am running the stock exhust anyway. I would have bought new ones, but I am a graduate student and the cost of new housings would eat up most of one months pay.

Kent

 

well if it will work for the application thats fine.

I'm scratching my head to figure out what motor those housings came out of.

In japan the last 13b before the second gen was in the cosmo.... mabey they had some special edition models with 6 ports or somthing?

 

usally the j-spec housngs have bigger ports! somethings fishy!? smaller ports = less power for sure!

 

atkins is a VERY trustworthy seller so I'm sure it will be fine.

however correct me if I'm worng, but wouldnt smaller exaust ports help torque, or more specifically low end torque?

I think it was in one of directfreaks threads, they started talking about the exaust port sleves he had and what would happen if he removed them.

 

yes ,it would increase torque but kill the top end!also the car is tuned for a certain size port, changing that would change the tune of the engine! proabably make it richer... less exh flow but the same amount of gas...

 

Yeah, I am a little worried too. The guy at Atkins said that he could port them out for $100, but I decided that it won't make too much difference and I can always port them later. If I do port the engine, I will probably go street port and do the intake and exhust together. It did sound a little weird to me too. But, I don't know too much when it comes to jspec. I also thought jspec were bigger. I am guessing they are cosmo housings, but I didn't ask. I did ask them repeatedly to make sure that they will work. Well, if they don't work out I will exchange them for new ones. I really hope that all will work out. Thanks for all the help.

 

they cant be cosmo housings, the water sear groove isnt there... if i were you i would locate some used SE housings, that would be your best option! or tell atkins you will buy the housings from him but only if they are ported to SE specs... it only should take him 30 minutes max , so if he wants to sell the housings he will do it

 

How much is he selling them for??? it would be a good idea to do a street port right now save you alot of trouble later on since the motor is already apart... http://www.thepartstrader.com might beable to find some there...

 

Thanks for the input. However, I have already ordered them but I don't know if they have been shipped. He wants $200 a piece which I think is a bit high. They are, however, suppose to be in very good shape. I had tried for the last week to find good used housings but have had no luck. If these work, they should at least get me though graduate school. At that time, I will have more time and money to put into the performance of the car, but right now I am just trying to get her back on the road once again. BTW, I had a lot of carbon in the engine. I attribute it to the poor installation work of the mechanic who installed the rebult engine. It had run rich for about two years. My dad talked to Hayes and the guy there thinks that it may be due to a clogged cat. What do you think? The main cat was replaced in 1992. I am not sure about the precats though.

 

Well man the way it works is when you don’t need a part you can find the part your looking for EVERYWHERE... but when you need them and or have the money people either want a small fortune for them or you can find what your looking for What’s allot of carbon??? have any pics? how many miles were on the motor and how hard did u drive it??? I worked at Atkins for a while and have ALOT of exp tearing down cores...

 

Tell me about it. It is just like when you are trying to find something in the garage, can't find what you are looking for and ending up finding things that you thought you lost. I don't have any pics but the rotors were completely black, and when I opened her up, (eccentric shaft pointing up), there was an actual pile of carbon next to each apex of the rotor. Each pile was about the volume of a cube 1/2 inch on each side. That's a lot of carbon . The engine was rebuilt was Hayes and installed by an incompentent local mechanic. The engine only has 40,000 miles. I have it complely torn down, I have new gaskets and seals, waiting for housings...

 

Well, I received my housings for Atkins today. I was impressed. They are in excellent condition and almost look as if they are new. I am still unsure which car they came off of but they do have the water seal groove in the right spot (same as gsl-se). I am not sure if the exhust port is actually larger or smaller than my SE ones, because the car and engine are at my grandparents house. The exhaust port does have a lip on it, which futher tells me that they are jspec. They look exactly like mine, but there is the letter 'F' stampped into the square on the top of the housing. I don't know if that helps. I will begin reassembly next weekend. Thanks for everyones help.

Kent