I have been working with Jon from Goopy Performance on and off for many years. Many times we have different views, but when he comes up with something that works, well I have no choice but to post some of my results and experiences. Jon has perfected a way of resurfacing used rotor housings. I mean this is pretty impressive considering most of us throw away rotor housings that he brings back to life. I will post pics of before and after.



Back in late 2007 Jon came over to me and asked me to try some crappy rotor housings he had resurfaced. I looked at them and said "Jon this will not work" Jon said: "Ito just try them". To give you guys an idea, those housings were grooved pretty bad by the outer edges of the housing and the trailing plug area were full of vertical grooves .(a common problem) and pretty much garbage. I Put 1 engine together using his used resurfaced housings with New oem 2mm apex seals. After 200 miles of driving I gave the engine a compression test @ 195 degrees of coolant temp. The engine gave me 125-128 psi with a conventional compression tester.



Since then I have put a few engines together with Jon's resurfacing. The better the housings are to start with, the better the results. The FIRST THING I NOTICE IS THE REALLY GOOD FLAT SURFACE after the resurface. On my last engine I did a compression test and pulled 131-132psi using his 2mm apex seals. I was stunned to say the least. I'm here applauding Jon from Goopy performance not for perfecting this resurfacing on other wise rotor housings we would have thrown in the garbage, but for his continued hard work to improve all kinds of minor and great details this engine has to offer.



for info. you could pm me.. I'm a skeptic that turned into a believer. congrats Jon.

pics of before.





Attachment 16619

Attachment 16620

Attachment 16621

AFTER



Attachment 16622

Attachment 16623

Attachment 16624



enjoy

What dose he charge for the resurface?

price is 125.oo includes the cleaning..

people price is 125.00 per set. you could call him direct or make arrangements with me. includes the cleaning of rotor housings.

That’s a very reasonable price!

finally, something useful that i'm actually in time to use. it's a very, very reasonable price. is this just a standard resurface, meaning he's just using the standard OEM material or is it something else?

****.... i've got a pile of old housings lying around... might have to give him a call.

to my knowledge it's a grinding of the factory material to bring back a working flat surface.

this is really a life saver on those old housings. good idea Jon came up with..

awesome! perhaps even more important is what this means for 12A guys.

nice looks good.

long time no speak ITO how ya been? hope ur holidays is going well!

Here Guys ....http://rotarycarclub.com/rotary_foru...ad.php?t=12967

information from Goopy performance.. enjoy..





--------------------------------------------------------------------------------



In today's economy everyone is looking for cost effective solutions and the best way to get maximum performance for their dollar. That was Goopy Performance's thinking and objective behind our ROTOR HOUSING REFURBISHING service.



When any of us consider rebuilding a rotary engine, the condition of the housings is a key factor. Up until now the options have been either 1.) use your housings as is or 2.) buy new housings at the cost of approximately $1,300 per pair or more. If porting had already been done on these housings, the real cost of replacement could include an additional $200 to $400.



Goopy Performance's process provides a solution at approximately 10% of the cost of replacement while providing not a 100% new surface for your seals to break into but a "like new" surface in the very high 90 percentile (95-99%) in most cases.



Here is an attempt to answer most of your questions from recent posts ...



1. We are NOT resurfacing or adding new material to the housings. We are refurbishing or refreshing the existing hard chrome surface.



2. NO we do not have data or photos showing results after 20,000 miles. However, we have had very high HP racers running our refurbished housings with our Goopy Performance Apex Seals for a full race season (40-50+ passes) while maintaining very high compression and no damage of any kind.



3. PRICING is $125 US per pair of housings with you paying for the shipping to and from Goopy Performance. This includes media blasting of the housings to achieve the "like new" appearance as seen in Judge Ito's photos. Please do not send dirty, greasy housings or there will be an additional $25 “Cleaning Fee”.



4. Our refurbishing process greatly improves all of the conditions mentioned in various different posts ... scratches, scoring, gauling and flaking edges. Our process provides a relatively flat, uniform, matte housing surface for your new seals to break-in to. The true measure of the effectiveness of the process is the compression numbers that are achieved when your engine is rebuilt, not just how the housings look. Our experience with our refurbishing along with using our Goopy Performance Apex Seals is that we have consistently produced compression readings at or above factory stock specifications. Also refer to Judge Ito’s experience after 3 years of having compression numbers of 125-128 psi.



5. The SIDE PIECE on the Goopy Performance Apex Seals does not come to such a sharp point at the housing surface like if does on many other apex seal designs. We believe this design improvement yields less wear and deterioration at the housing edges that cause potential compression leakage.



6. In most cases the amount of material removed to achieve these “like new” results is relatively insignificant. In our experience, utilizing our Goopy Performance Apex Seals which are manufactured at the same height as OEM seals, we have not experienced any issues due to the removal of this minimal amount of material.



7. If you are unsure if your housings are candidates for our refurbishing process please send photos and description to info@goopyperformance.com before expending your time and resources on packing and shipping.

However, if we receive housings that we consider to be beyond repair with our process, we will notify you before any work is done.



8. We provide our housing refurbishing service on all models of rotor housings.



Please email to info@goopyperformance.com if we have not addressed all of your earlier questions or new ones have come up in the meantime.

Thanks for sharing your findings on this Judge. Much appreciated.

no problem sarg. happy new year and greetings to your kid and the lady boss.

I just dynoed my nephews turbo II using this refinishing job on the rotor housings. engine made 400rwhp @ 15lbs of boost. engine pulls 14.9 inches of vacuum. nothing but good results with this type of remedy.. next dyno session will see 22psi of boost.

OMG! Im so happy for these services! I have five 12A's that are blown I will be contacting you guys as soon as my tax return arrives! https://www.nopistons.com/forums/pub...1047683329.gif

Between the five 12As you might have two rotor housings that aren't heavily flaked out https://www.nopistons.com/forums/pub...>/rolleyes.gif

I sent Jon 4 housings beginning of Feb. He had them completed and back to me in under a week! They all came out great, and he was a really easy guy to talk to on the phone and email. gets an A+ for customer service in my book! Hes pretty close to me so he will get a lot more of my business!



Wes

I just did a 12A bridgeport for a daily driven Mazda B2200 pickup. using Goopy's refinished rotor housings with apex seals. I wanted to do a compression test as close to real numbers as possible. I did not lube the side housings with oil and I did not lube the rotor housings with oil. basically a dry build and dry test. I did not want the lube oil to add to compression numbers. engine made 125psi equally on both front and rear rotor. enjoy the pics..



Attachment 16433



Attachment 16434



Attachment 16435



Attachment 16436

impressive

awsome

this engine fired up extremely fast. with compression numbers like these it's no surprise.. I'll have a video up soon.



Attachment 16430



Attachment 16431