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rx-7 delema, what would you do?

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Old 02-05-09, 10:18 AM
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rx-7 delema, what would you do?

Hi guys,

Well this is just a theoretical question, as i still don't have an engine, but just want to hear your opinions on the metter ^^.

I Currently have an 83 gsl, with deformed(lots of welding from crashes) body, but working engine and transmission.
I also have an 90 GTU with an amazingly perfect body, only minor rust spots, with what seems to be a working engine.
I also plan to buy another 84 rx-7 shell this sunday with a fried motor.

In montreal right now we have a 20b with transmission (40,000km) on sale for 1,300 and i was wondering into which car would you guys put the engine into?

If i buy the engine, should i put it into the GTU and put the 13b into the 84.
or should i put into into the 84?

My other option is to put the engine from my 83 into the 84, then put a v8 into my 83, and sell it :P

Now this is not a made up post, can prove it with pictures on request, most of the work wont begin untill summer, so just brainstorming ideas now.

thanks
Old 02-05-09, 11:51 AM
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Man up, put it in the 84!
Old 02-05-09, 12:07 PM
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+1 put it in the first gen!!!
Old 02-05-09, 01:43 PM
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First got to apologize to you guys.

Due to my missunderstanding of 20b, i gave you the wrong information.

The engine is from a 2004 rx-8 with cloth interior, so after i re-educated myself, i'm guesing it's a renesis 13B-MSP 4 port , correct me if i'm wrong once again.

The seller riped the engine out of wrecked rx-8, claims the engine runs. Will see if i can get the compression rate, to make sure it's all good when i go see it next week, if i decide to take on the project and allocate the funds that is

I was also thinking of putting into the 84, so i only have to do one motor swap, easier, cheaper :P

In any case the plan is to go NA with a wide body. Don't have the cash to spend on turbos.

Will see how it goes, hopefully will be able to start a build thread soon :P


Here is a picture of the engine.
Attached Thumbnails rx-7 delema, what would you do?-untitled.jpg  
Old 02-05-09, 01:50 PM
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Man up, put it in the 84!
Old 02-05-09, 01:52 PM
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Originally Posted by Kerebrus
Man up, put it in the 84!
Got your message the first time
That the plan i like the best anyways, since it's cheaper :P and i get to have more fun in my fb lol
Old 02-06-09, 02:25 PM
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options

cheapest:
use the 83 to restore the 84
sell the 83 rolling chassis
use the 90 as a daily driver

coolest:
Put the Renesis in the 84
sell the 90
clean up the 83 as a daily driver

are you sure you really have a "fried" engine?

most insane:
Renesis into the 84
90 as daily driver
900 hp dual turbo Dodge 318 with A518 OD transmission into the 83
Old 02-06-09, 02:46 PM
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WOW love the insane plan, but doubt the body of my 83 could handle it. Had to weld the frame, it was rusted and bent from improper jacking :/

I'm new to the car buisness was never a big fan of cars till i got my 83, it all changed from that moment on, so i just do assistant and body work. Most mechanical asspects is handled by my dad who used to work as a car mechanic specializing in race engines in CCCP. He's a geniouse when it comes to piston engines, unfortunatly never till now had a chance to work with rotery engines, only read about them, been his dream to own one.

The engine in 84 has a blown apex seal, and from what i read that propably means a damaged rotor housing as well. I'm sure getting a 40,000km renesis engine for 1,300$ is cheaper then doing a rebuild on a 12a. I been reading about the swap of renesis into the fb and it seams that i would be looking into a lot of costs just getting it to run, due to cpu. So not sure now if thats a good way to go.

as for using the 90 as a daily driver, well the car is in too good of shape, structuraly wise, that it would break my heart to do that. The original plan was to get it running and sell it, but after i saw it in person, i'm not sure if i want to sell it anymore. Will see.

the 84 comes with a roll cage, and 15" rims with 5" lip. so a renesis in that, with a wide body is defenitly a better choice. Or i sell the rims :P
The owner of the 84 is also selling a 305 chevy with 200-4r trany for 350$, he was planing to do a v8 swap, but now wants to buy an mr2.

If i go carb with the renesis, would that make the swap easier? don't really care about the power losse right now.
Does any one have any information on a succefull renesis swap into an fb?
Attached Thumbnails rx-7 delema, what would you do?-424402_5480.jpg  
Old 02-07-09, 10:59 AM
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never give up

Originally Posted by reisama
WOW love the insane plan, but doubt the body of my 83 could handle it. Had to weld the frame, it was rusted and bent from improper jacking :/

I'm new to the car business was never a big fan of cars till i got my 83, it all changed from that moment on, so i just do assistant and body work. Most mechanical aspects is handled by my dad who used to work as a car mechanic specializing in race engines in CCCP. He's a genius when it comes to piston engines, unfortunately never till now had a chance to work with rotary engines, only read about them, been his dream to own one.

That is great that you get to work together.

The engine in 84 has a blown apex seal, and from what i read that probably means a damaged rotor housing as well.

Are you sure the seal is broken and not just stuck due to carbon? Maybe try the Sea Foam soaking treatment to see if you can dissolve the carbon?

I'm sure getting a 40,000km renesis engine for 1,300$ is cheaper then doing a rebuild on a 12a. I been reading about the swap of renesis into the fb and it seams that i would be looking into a lot of costs just getting it to run, due to cpu. So not sure now if that's a good way to go.

If you can not get the factory CPU you should consider converting to a Megasquirt stand alone cpu rather than a carb conversion

as for using the 90 as a daily driver, well the car is in too good of shape, structurally wise, that it would break my heart to do that. The original plan was to get it running and sell it, but after i saw it in person, i'm not sure if i want to sell it anymore. Will see.

the 84 comes with a roll cage, and 15" rims with 5" lip. so a renesis in that, with a wide body is definitely a better choice. Or I sell the rims :P

Post the wheels on the list including all details

The owner of the 84 is also selling a 305 chevy with 200-4r trany for 350$, he was planing to do a v8 swap, but now wants to buy an mr2.

That is about the worst Chevy engine and trans. Do not even consider it.
Keep in touch with him in case he gets the MR2 and replaces the rear struts you want them for the RX7


If i go carb with the renesis, would that make the swap easier? don't really care about the power loss right now.
Does any one have any information on a successful renesis swap into an fb?
I think you will find a few threads on the renesis by using the search function on the forum

What is this CCCP you speak of?
Would that be the procect to generate energy from chicken droppings?
Chicken Chip Conversion Project
Old 02-07-09, 11:26 AM
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Originally Posted by wecycle
Are you sure the seal is broken and not just stuck due to carbon? Maybe try the Sea Foam soaking treatment to see if you can dissolve the carbon?
i'm going to see the car tommorow, just know what the owner told me, will be taking it apart just to see how bad it is, if the housing and all is still good, will rebuilt it, if not, practice porting :P
Post the wheels on the list including all details
Sorry, what list?
they are 15x7 with 5" lip, see picture, not sure what brand they are, not sure if any one can tell me.
That is about the worst Chevy engine and trans. Do not even consider it.
Keep in touch with him in case he gets the MR2 and replaces the rear struts you want them for the RX7
oh, didn't know, thanks for the heads up. My 83 has brand new struts, put them in just before winter, only have about 500km on them.
Attached Thumbnails rx-7 delema, what would you do?-417076_5480.jpg  
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