Ok Im sure alot of you guys no that I am new to the board. I am looking into doing 1 of 3 things to my 1990 Turbo II RX7 which has a blown engine:
1) Rebuild the engine
2) Buy a j-spec engine from Corksport.com
3) Buy a rebuilt engine from www.hayesrotary.com (comes with a 1 year warranty...but I must send them my core or pay $300 extra)

First I want to ask what you guys think I should do. I may take a few months to save the money...but a $500-$1000 change is not that big of a deal.

I want to know if anyone has purchased from hayesrotary.com or corksport and I want to know if they were satisfied. Anyway I'm kind of edging more towards hayesrotary.com because I talked to them and they seemed to know there stuff and ontop of that I can pay a extra $150 for a 2 year warranty on the engine. The total with just a one year warranty is $1840 including shipping. Anyway I can't wait to get my RX7 going....so many choices to make now.

 

How long you want to keep it?

Only a year or two then get the Jspec,

More than a year, you have an extra car so you have time to rebuild it right and you want to tweak some extra power as well as you want to learn a rotary, rebuild it yourself.

More than a year or two and you just want the car to run, you don't care about tweaking up the motor then get the Hayes motor.

 

also try www.nippon-motors.com ...i think TonyTurboII got his motor from there and it actually came with a warranty but you'd have to ask him to be sure. good luck man!

 

Is the engine actually BLOWN or worn? If its blown, i would inspect the internals (which requires some effort ). Mine was BLOWN and the apex had scored the housing pretty badly. Plus the rotor had "expanded" around the apex groove, so it was too narrow to fit a seal in there. The price for new housings and rotors was about the price of a new (rebuilt) engine.

If the seals are jsut worn down, you should rebuild. If there is some serious damage, get a new one. Mazda's will probably give the longes life. Plus if you sell the car, you can say it has a new engine under warranty... just MAKE SURE to break it in properly.

 

I'd buy a Mazda remanufactured engine. They're competitive in terms of pricing with any rotary shop in the U.S. and since they built the damn things in the first place I'm sure the quality is there. There's one in the convertible with 40k on it and it runs very strong.

 

Hayes rebuilt my motor and it is great. The did the stage II street port, 3mm apex seals, DP and a bunch of other stuff, and it came with a 2year warrentee. Im happy so far.

 

Wow, someone said my name I did get my motor from Nippon, They have a very nice warranty, 6 months, and even though its kind of hard to understand them, theyre nice people. My motor was 750, plus 210 for shipping to my door. That was an 87-88 motor though, I think the 89-91's are about 200 bucks more. Theyre cheaper than Corksport, but im not sure about Corksports warranty. I had a problem where I though a seal was stuck in the motor they sent me, it was actually an intake leak, anywho, they said to test the compression, and if it was bad to send it back, and theyd pay the expanses. It was infact good, and they were glad I let them know that. Ya know, you'll have to swap your old engine stuff on to the J-spec, and sell the J-spec accessories to offset the price. Its not a bad way to go, I think I got 100 bucks for the intercooler. I would have to say though, If you have the money, get it rebuilt, and research the builder thouroughly. If you dont have the money, the J-spec is a great bang for the buck, and I dont regret buying mine. If this motor blows, and im short on funds, ill definately get another J-spec. BTW, do you feel mechanically inclined enough to do this? I didnt, but its really not that hard. I hope you have patience, and a beater. Any ?'s dont hesitate to ask, ill keep checking the thread.

PS. A Jspec will probably come with a turbo, they do 99% of the time, which you can send off to be rebuilt and upgraded, while you run the stock one. Its a nice conveniance that I plan to use sometime in the future.

 

i recently replaced a bad engine. the 4 contenders for a rebuild were.

Mazda
Mazdatrix
Atkins
Hayes

most rebuilds were roughly 1700 for a base rebuild.

Mazda wanted 1000 for core 12/12000 warranty

Mazdatrix was just plain too expensive

atkins had a 500 core, but were backed up a little when i called them. 24/24000 warranty

Hayes offers a 36/36000 warranty, and the core is only 300 or 350. plus hayes offers mods that make alot of sense like a high volume oil pump. shimmed oil relief valve. operating oil pressure at 85 psi or so, and running much more oil through the engine at the same time.

 

If I were you I would ask around for the best Rotary shop in your area. If your in Dallas there has to be alot. I'm sure someone on here could help you. They should be able to rebuild yours & improve it (street port, 3mm apex seals, etc). I would not like to be waiting for the engine, paying for shipping, blah blah blah. Than if the engine is messed up you have to go through the whole sending it back & ****. Thats just me, but I like to visually see the people I deal with. Thats my 2.

 

It depends on what you want.If you want an engine that lasts longer then rebuilt the one you have,but if you want power then you should get the j-spec they are awesome engines.
And if you get one try to buy and enfine because they have a better design turbo and if you add mufflers then its a 280hp
car its hard to beat that .

 

Maybe its just me, but my car seems ungodly fast. Either A: it is, or B: Im not use to driving a car this fast(My daily driver is an Explorer). My friend has a DSM, ive driven it before, and it was quick as hell. I want to say my car feels faster though.

 

Wow thanks for the reply's. Here is what I want:
This car will be my fun car....weekends and after work...so I don't expect to drive it a whole lot like my Honda. I do want it to last a while...I'm not expecting it to last to long...but you get the idea. I would love to have atleast some type of warranty on it. Now I also want it to be fast...but then again my car as of right now is a 94 civic cx hatchback which is the low end models and slow as hell.

Now to answer the question about rotar shops in Dallas. The only one I have heard of is Rotary Performace and they want $3500 for a rebuild and on top of that they have a 1 month + wait..

I think I may go to nippon-motors and check them out. I talked to some friends and they suggested I get one from cork-sport.com or nippon. They said that they usually come with the turbo's and my friends said they will do the swap for the older turbo and junked engine...which sounds good to me cause I know nothing about swapping a motor and defiently don't have the tools to do it.