i'm planning in the near future to get an atkins supercharger. my current engine is a 12a (85 gsl) that needs rebuilt(sat 4 years, lots of white smoke).my questions are should i just have the 12a rebuilt?should i upgrade to a 4 port 13b?(I'm assuming from the pictures of the Atkins that it is for a 4 port http://www.atkinsrotary.com/store/cu...cat=285&page=1 ). what kind of hp could i see with the 13b atkins setup? the 12a? Should i run lower compression? Can i? The sc says its pulleyed for 8 lbs boost.racing beat suggests no more than 5 on stock compression (in their catalog). should i just run 5? any help or knowledge on the matter would be appreciated. don't tell me to go turbo. i don't want to.

 

They have pullies for 6PSI which would be fine. They only have a 7" for the 12A, but you can choose either a 5" or 7" with the 13B. You're probably better off with the 12A because it will cost less (engine wise) and actually fit in your car without modification.

No offense, but if you need to send your engine away to get rebuilt, you probably wouldn't have much luck swapping in a 13B. That's been my experience, anyway.

 

thanks. i might rebuild it myself there is a first time for everything. but right now i'm going nutz without something fun to drive my wrx was in an accident and i'm stuck driving a crappy chevy truck.I'm having fun just tinkering on the rx7 every thing seems simple enough.I'm not scared.anybody out there guestimate what kind of hp i can get from a stock compression 12a running a 7" Atkins at 6psi?

 

Should be up around the 200-220 mark, with headers and a decent carb I would think. There's a few guys on here that have em, but I think most are running 4-port 13Bs. Anyone else care to chime in?

Zac

 

oh ya i'd like to street port it.

 

You must consider the torque improvement too, there is a big jump in low end with the s/c.

 

I always wondered about the atkins s/c. But didn't want to bother them because I wasnt serious about buying one yet. But I want to push like 12-15 psi. Just wondering how large of a pulley that would require on a 12a

 

Another Super Charger question! Ok..I'm being a little dramatic, but, I really want to do this to my car. Just saving the money. It always seems to degrade into a turbo vs. super charger vs. NA debate.

I too have a 12a and I'd REALLY like to hear from somebody who has done it.

I called KD Rotary about it a while back and talked to Skip. Realized it probably wouldn't be a good idea to put a blower on my engine @ 115k miles. So, kinda put that one on hold. With rebuild and the S/C kit it gets pretty expensive. Especially since I can't do the rebuild myself. (I AM scared to do that!)

So, who can encourage me! Who's done it to a 12a?

 

That's funny, 'cause I ran up to 16psi with no problems at all. I'd try to keep it below 14psi through, 16 is about the limit. This was with a non-intercooled turbo setup.

 

A 13B swap is simple in comparison to an engine rebuild.

 

how much will my automatic tranny take?( hold the boo's on the auto while i wait for my leg to grow back)

 

We did a 84 auto [4 port 13-B swap] and it holds up fine with 5-7 psi of boost it would not hurt to get the trans rebuilt thoe.

Dan

 

Maybe in your opinion, but my engine was extremely easy to rebuild, the worst part was taking it out and putting in back in, so i would say a swap isn't as easy, keep in mind you have to find a front cover to put on the engine (unless its an se engine already), and if you can remove a front cover you can tear down a rotary engine

just buy the atkins rebuild video and get all the seals and go for it, i was scared until i took it apart and i was laughing at myself for ever being scared, they are so simple!

 

I have a 79 and changed the 12a to a 13b 4 port w/turbo housings. Its ported, but not extream. I was running a carbed setup on the car, and Camden "Atkins" did the mods to change to fuel injection and Microtech and 7in blower. If you want low end on your car, go supercharger, they are awesome. Ive had Camden Superchargers in my car for about 4 years now. I am only running 5lbs boost right now, and have 212hp @8500 in 3rd with that boost. I can change the boost one more time to 11lbs boost, but Im tellin ya 5lbs is plenty for the street. I still have somemore work to do in improving some things such as my tranny and rear end, but my car screams right along. I will be racing it on the 20th of this month with some slicks to see if it will give me my 12sec 1/4 mile. Anyways, if your really interested in the Superchargers from Atkins "Camden", feel free to instant message me, and I might be able to help answer some of your questions. The good, the bad, etc....@ strawburbr1 (AOL).

 

Okay.... Any of you in California and running the Camden 7" unit? I'm just wondering about the legality of it all, since the web page says it isn't.

Also, HOW much of the wiring needs to be changed to go from a 12A carb to a 13B EFI setup? Thanks for any replys. Oh, how much money to do the swap too!

 

There is a guy here who's been running a camden with 8lbs boost for 4 years on a 12a, streetport with 12a turbo rotors. He dyno'd 174hp at the wheels with his setup. I ran a 7" on my SE (140,000 km, stock engine) and the engine blew from detonation within a day. It's getting rebuilt with turbo rotors and ported now and will be running 9lbs boost.

 

was it really worth bringing this thing back?

 

Why not??

 

"was it really worth bringing this thing back?"

If a member posts a question thats been asked before you yell at them to search.

if they bring up an old thread (after searching) you bitch about that, grow up and make up your friggin minds


kenn

 

Exactly! I absolutely hate that "search" response when someone asks a question...and I have absolutely no problem with bringing up old threads. I would think that would make searching easier, since there would be fewer threads pertaining to a particular subject.

Just my $0.02.

Rich

 

Wow, touchy subject... Reviving dead threads....

I guess no CA people have the answer though... I'll have to search around the laws I suppose. Oh well, how long before my 85 doesn't require smog? Another 10 years or so? LOL

As to the guy with 20Bs... How much do those run (Just curious) and what all is required to change one out? I've always been curious about 20B conversioins in first gens.

 

Bad news: CA didn't renew the 30 yr sliding window on smog. Only cars in or before 1975 are excluded - forever. Even in 10 yrs our 85s won't be excluded.

B

 

I knew I hated CA for a good many reasons.

Edit: Where in NorCal are you Bliffle?

 

Yeah i get tired of people bitching about the whole search/thread revival thing If you had just asked they would have told you to search, and if you search they whine casue you bring an old thread up.

I only have one left (20b) done sold the other 3, this one is 4,500 K shipped to longbeach california (I live in Japan) and it has 22,000 miles on a rebuild by Pan Speed. it has excellent compression, and was tested recently by the local mazda dealer with a compression reading of 8.0~8.1 (115 psi) compression on each rotor face for all 3 rotors.

kenn

 

Only problem lately is the proxy error won't let people search, finally had to post my question.

Anyway, point us in the direction of those s/c threads, for those of us who arn't able to do a search at this point in time, that way folks won't have to bitch about redundant/dead threads. because I've been thinking about an s/c for my 12A as soon as I get ahold of a new rolling chassis.