RotoryConfused22

I recently purchased my 87 rx7 a couple weeks ago and i know absolutly nothin about the rotory engines... they dont look to hard to figure out but i still need some help. i bought my car for $200 great body interior was guted and it doesnt wont to start (will kick over but wont start). i keep hearing about the cosmo swap and wont to know more info about putting it n my "7"... this one guy i called in Cali told me that if i did the swap ima need my ecu remaped or get an AEM ecu managment box??? (never messed with electronics much)... just wont to know if its true and what all i would have to do to swap it...

thank you.

P.S. i wont to learn how to make my own interior like side panels and dash's if anyone has any know how or any sites please let me know...

Evil Aviator

You have an appropriate screen name.

I am not sure which Cosmo engine you are interested in, but it is probably a 13B-RE (aka Cosmo 13B-REW) or 20B-REW. Either way, this is going to be a difficult swap because neither engine has the correct mounts for your car. The 20B-REW requires a standalone EMS. You may be able to get the 13B-RE running with the original ECU, but it wouldn't be pretty. I would suggest something easier for your first project, such as rebuilding your current engine. If you really want a turbocharged engine, then a 13BT from a TurboII would be easier than the Cosmo engines.

There is a chance that your current engine is suffering from only a minor problem. Prior to spending a lot of time and money on your car, I suggest that you check the compression, and check to see if it is flooded.

I am moving this thread to the 2Gen RX-7 forum where you will probably get better responses.

See this forum for custom interior tips:
https://www.rx7club.com/interior-exterior-audio-26/

RotoryConfused22

See i was thinkin about putting the Turbo 2 engine in but this company in cali told me that there is certain HP it can have or i will blow it... also he said if i remaped the ECU and the person who remaped it messed up then the cosmo will blow up... so i have no clue how to get some really big horsepower out of it... He said that the max stock pounds of boost i could run is 10 on the turbo 2 motor? i just wont to learn more about Rotory's and see what kind of power they have. I would be fine with like 500hp nothing to seriouse like 850 to 1000 like in magz. but somethin nice and streetable. if you could help me with some info i would be very greatfull. also the guy in cali i am talkin about his company is called mazda trix http://www.mazdatrix.com/

RotoryConfused22

i just checked out the price on a Turbo 2 engine Tranny ECU and wiring Harness and the people i go threw said $1000 for the whole swap and i think it has only 30 - 40,000 miles on there engine swaps... i fi am to get it would everything bolt right up like the engine and tranny mounts and stuff or what will have to change? well if anyone could please let me know just leave me a message thanks...

powrdby13B

describe your problem and see if you can get the car running first... then you might decide to go NA all the way... if you got money, a 13-second NA earns you respect in the rx7 community, eh?

IaMtHeRuThLeSs1

God if you want to learn about rotarys PLEASE learn how to spell it!

From the sound of it you are in WWAAAYYY over your head.

A 500hp Rx-7 will NOT be easy...considering you know nothing and havn't taken the time to search for answers to those questions a thousand times. scratch the interior question.

$200 sounds like a good deal though if you can get it running, describe the problem more appropriately and maybe someone here can help.

powrdby13B

LMFFFFFFFFFFFAO
You mean rotaries??? HAHAHAHAHAHAAH

RotoryConfused22

listen **** yall about my spelling im SLD thank you so i dont wanna hear no more crackin about that ok... second i know 500 is alot to get too but i really wont to see what this car can do like i said i have never messed with them b4... i dont know what the problem is i thought it wasnt geting enough fuel so i put new injectors in it cause they did not spray but now i dont know the problem. Also i put new NGK plugs in and ima take it to a shop hopefully soon and see what they say it is then bring it back and fix whats gotta be fixed. also i would like to know more about the NA rx7's cause you dont hear to many of them runnin 13's. someone hook me up with some really good sites 4 me to check out.

eriksseven

iTrader: (6)

^ this is probably the best, IMO... Stick around for a while. Use the search function (no joke), check out the FAQ, archives etc. You'll realize that a lot of your questions have already been answered quite thoroughly.

Have you checked the compression yet? I would make this a high priority...

RotoryConfused22

ima do the compression test tomorrow i herd that you have to have a special tool for the rotary engines to check compression but then i also herd you can just use the regular tester will work just as fine.?.? how much should the compression be in the na engine and how much in the turbo ?

Evil Aviator

http://fc3spro.com/TECH/FAQ/compress.html

Also see chapter 1 of the service manual for more specific instructions.

eriksseven

iTrader: (6)

ya,, you can use a slightly modified conventional compression tester to get a pretty good idea what your comp. is. You remove the small "check valve" that screws on and off of the tip of the tester. This allows the needle to bounce around freely, instead of only registering the highest compression pulse. You need this on a rotary, because there are three different faces (think the triangle shape of the rotor) that must be tested. The reason this method is somewhat sketchy is because the pulses come so fast, it's hard to see much differentiation between the bounces. Just watch the needle carefully and look for uniform numbers of 100psi and above. You'll be ok with 90+, but be careful because you might be looking at a rebuild soon.

To do the test, remove the EGI fuse under the hood closest to the block (this will cut fuel delivery). Remove the CAS plug (on my s4 TII it's white and is located right above the front cover and a little to the drivers side.) This will disable the spark. Remove the 2 lower spark plugs and screw the tester tightly into one. Have a buddy get in the drivers seat and depress the clutch and accelerator, holding them to the floor. Have him crank while you carefully watch the needle on the gauge. Repeat for the other lower spark plug hole. This will give you a pretty good idea of your numbers. Good luck dood.

RotoryConfused22

i'll have to try it the way you say to cause i tried it with out knowin all that and got only 20psi compresion so ima try it like you sa then ill tell you what i get...

thanks for the tips