Dutch

hi im new here i was directed here from colinrx7 i am woundering whats a good rotary engine to swap into my truck its a b series mazda has anyone here done one before?

mazdadrifter

Judge ito has done this swap into a b2000 i believe and has had luck with it.



as far as the most appropriate engine? Well if you just love the rotary, want smooth power and will drive your truck daily (must have reliability). I'd say a non turbo motor out of a 89 - 91 rx7. If you can afford a stand alone, you can tune this motor on stock ports to about 200hp, with incredibly smooth torque.



If you want to be able to tow stuff, and use it to transport some weight, as well as have it get up and move, I'd say a turbo motor out of either series 2nd gen, with a stock turbo, or a hybrid upgrade. The motor will still be reliable, (not as reliable tho) but the performance increase will likely be worth it. Much more torque and sooner, more hp, and the exhaust note will be much better.



Choose your poison, but if it were me, I think I'd like the durabilty of the non-turbo unless you plan on doing some street racing.

Judge Ito

I've heard ito has done a few

Dutch

Im sorta thinking maybe turbo now.. but how well dose the rotors handel boost because im thinking i should go for all speed

mazdadrifter

TUNED CORRECTLY (I'll say it again) TUNED CORRECTLY, they could live a long life at 15psi, which will make you a lot of power, probably enough to rip the tires looks on a *** light truck just about every time you get on it.

Dutch

thats awsome... what would go first in those engines

ColinRX7

It's too hard to say what would go first.. It depends who rebuilt it, and if it's a factory motor, depends alot on mileage and maintenance.



Generally they last a very long time in my experience, I don't know how many times I've seen N/A Series 4 RX7s with over 300,000 KMs on the clock.



mazdadrifter why do you say S5 N/A Motor? I agree on the power side but what about the limp mode functions of the ECU.. I think there could be more things that would go wrong..



Which brings up the point of how do you want to manage this motor.. I wouldn't suggest using a stock ECU from an RX7, but it can be done fairly simply, it's just there's alot of sensor inputs/outputs that can go wrong, which can be a big headache when doing a full motor swap into a completely different vehicle..



I don't know if ITO used stock ECUs, but maybe someone could enlighten us on how to successfully use the ECU without any major setbacks?

ColinRX7

Speaking of which maybe carburated and 1st gen ignition would be the easiest swap..



I referred him to the forum because I know other people here have done it, I was more curious about what motor mount style goes best with the B-Series.. 13B with a 1st gen front cover style, or FC3S centre iron style mounts.



What about the 12A with front cover mounts (because of it's shorter block size)?

mazdadrifter

i recommend a stand alone with any swap, considering it actually made my swap a lot easier, and much more reliable and powerfull.



A well, not-so-friend of mine had a problem with his s5 vert, the electric omp had shorted a leg and kicked the car into limp-home mode, all his quotes for used omp's were in the 600 dollar range. And without replacing the stupid thing, the car wouldn't ever run right. On a s4 that wouldn't happen, and even if the omp failed, you just pull it off and run premix.



I hate stock ecu's and don't recommend them to anyone.

ColinRX7

I hate them too but they are the easiest to be budgeted in, in this circumstance.



I don't run a stock ECU anymore either.