Rotor housing resurfacing results
 

Hi I am currently building up my 13b from my 93 rx7 while taking the engine apart I looked at both housings and they were ok but far from were I wanted them to be. After looking at my options for rotor housings I decided to have Freelance motorsports resurface my housing below will be the before pics of the housing.
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more pics
 

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After pics
 

Hi here is the after pic of front housing

How much did they remove?

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After pics of rear housing

Hi I forgot to ask but they said they will never go out of spec. But I will email them and ask.
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Hi overall they did a awesome job and I would recommend them. The housings are far better then they were originally. Another good thing about them is they do a ultrasonic cleaning on the housing which makes them very clean
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Hey ArmyOfOne I noticed from your location on your profile that you are in Washington who would you go to do a porting on these housing and my irons.
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Isn't Pineapple up there in the NW? Their (Rob's) porting has proved to be very good overall.

Oh OK I will ask him

Depending on what your goals are I would keep the stock ports on the rotor housings. The 13b peripheral exhaust port is VERY large as-is.

Were those housings sandblasted?

I may be interested in this service , howmuch was it if you dont mind me asking ?

Hi the housings were not sandblasted they were ran through a ultrasonic cleaner as for price I think they were $150 each not including shipping good deal I think compared to new housings.
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Lets us know how the engine runs when you get it running.

I'm looking towards resurfacing some rotor housings I have and if it turns out well for you, then I'll get them done for my engine build

Hi im not going to get my engine done in a while but im 99.99% sure that they will run just fine I see people running housing that have chips so they will run just lower compression but the housing I had resurfaced are basically flawless now and there is almost no way of having problems if they are still in spec and the surface is perfectly smooth and square.
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BTW cptpain it sounds like you have had problems in past on resurfaced housings what happened.

Here is the URL for the website that resurfaced my housings.
Rotor Housing Resurfacing | Freelance Motorsports LLC

And here is there facebook
https://www.facebook.com/FreelanceMotorsports .

No, just wondering. Cause new housings are expensive and if resurfacing is as inexpensive as I've heard, then there's no point in paying $700 for new REW housings.

Anyone have these running now? Definitely tempting.

Once I get my engine going I will tell you guys how they hold up with a compression test but that will be a while because I need to get all the seals first and then port the engine.
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This has always been the way to go. Dont get new housings unless you absolutely need to.

Think of it as a similar process to honing or reboring a piston engine.

I have not done it, but my father has put together an REW which had the housings resurfaced/honed. It was a red JDM touring and apart from the resurfaced housings, it used stock seals and stock components, stock ECU and stock boost. It ran extremely well and was sold soon after. 2 years later I believe the car still runs fine in Western Australia.

Hi SA3R who did the resurfacing on your fathers housings.
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ALL of the experienced engine builders I've talked to have said this. Sean at A-Spec, Mazdatrix, many more... Really wish I had done that on my own build. Cleaned up stock ports really are the best way to go.

I've built a couple monsters... :nod:

^ LOL


They certainly look sandblasted to me. He may ultrasonically clean them but they are sandblasted first.


Is the surface rough on the outside?

what is the downside to resurfacing a housing?

I don't think there is really a downside to getting them resurfaced in my opinion. I was nervous about getting them resurfaced at first but when I got them back I was very pleased. Also the housings are supposed to have really good compression because they are very square once they are resurfaced. Also the other person who had a question on the housing being sand blasted they do not appear or fell like they have been sand blasted.
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They look great. What are you doing for seals? I'm assuming something softer than the stock apex seals. I know a lot of people have varying opinions on this topic but would a seal like Goopy Performance's apex seals be a good pairing with refinished housings? I know they offer a refinishing option for rotor housings too. J/w

Hi I am not to sure on which seal I am going to go with as of yet. My rotors are 3mm because the rotors had a good size gap from the stock 3 piece seal.
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Always good stuff from them. Were you the one I messaged to check them out months ago? I have 20b parts sitting over there. I just need to dig a little deeper into my pockets to finish! I have also had a bunch of housings resurfaced cut by them and ran them with no problems in the half bridge port motor I had. Send them some of your engine rotors if you want to really see some cool machining porn!

where are you located? Im here in spokane washington also

I had the housings here for porting and I can assure you that they were sand or bead blasted prior to the ultrasonic cleaning. The housing surfaces did look really good, edges were spotless.

Thanks ArmyOfOne for the great job on the porting.

Thanks for trusting me with your babies...