hobie237

my poor rx-7's motor is shot, and instead of rebuilding i was wondering about dropping in an rx-8 motor from a junkyard... might this work? would i need to drop the whole drivetrain? would it fit? any comments? anything?

impactwrench

V-8, if you are going to convert. see jimjab threads

RETed

You got $10k?
Good luck!


-Ted

hobie237

i really want to stick with the rotary...if i wanted a v8 i would have bought a beat up c4 vette or mustang 5.0... i'm just really not sure if this is possible... i really need to know how different the motors are and how much modification is needed to the mounts, etc.

87turbomkiii

If you want to stick with the rotary and not spend a small fortune I suggest you rebuild your motor or upgrade to a TII power/drivetrain if you car is not a TII.

JaNusSolSumnus

The RX-8 motor isnt that great anyways -- bad for turbo applications and doesnt create NEAR as much power as the 13-BREW. It'd be a downgrade IMHO.

Now, a 13-BREW or even a 20b in a RX-8... now that is YUM!

~Kris

hobie237

so what is the best power and performance combination that is reliable???? i dont really care if i have to rebuild the motor every 40k miles, but it has to start every time i turn the key in between rebuilds

mistaxko

iTrader: (1)

forget the rx-8 motor and just rebuilt the fd motor.

mistaxko

iTrader: (1)

maybe you can do a 20B swap.

NewRXr

2004
Engine
Mazda RX8 --1.3L 5SPD X-OVER W/ACCS,WIRE HARNESS S42288 $5500.12 LKQ - Lakenor Auto Salvage USA-CA(Sante-Fe Springs) E-mail 1-800-525-3667
2004
Engine
Mazda RX8 -TESTED GOOD,NO DAMAGE,MANUAL,1K MILES! 1K 412X08 $3500 Forty Three Auto USA-MO(Joplin) Request_Quote 1-888-704-7904 Request_Insurance_Quote
2005
Engine
Mazda RX8 1.3,F-6,MFI,RWD 05A106 $3000 Japanese & European Auto Parts USA-FL(Tampa) Request_Quote 1-813-663-9741 Request_Insurance_Quote

It's not the engine that won't respond, it's the complex OEM engine managment programming.

I think with an aftermarket enigine control this would make an awesome swap. Based on these prices it would be worthwhile for the power.

Good luck,
Vernon

neit_jnf

iTrader: (17)

Well, the Greddy Turbo'ed Renesis with an E-manage piggyback got 240 whp at 7psi... I think it's a good upgrade!

hobie237

one of the main concerns with dropping the rx-8 motor is the electronics... but if i drop the whole drivetrain the computer wouldnt know the difference, right?
will it just think its still in the rx-8????

hornbm

The problem is the network is multiplexed. And as far as multiplexed networks go, its definately one of the more complicated ones

GoodfellaFD3S

iTrader: (213)

Stick with your FD motor. More power potential. No automotive 'swap' is ever easy. You are looking at many many months of frustration and wasted cash---being a pioneer usually sucks.

erv187

i think it would be cool to do an rx8 motor swap into a 1st gen. would prolly win shows