Other Engine Conversions - non V-8 Discussion of non-rotary engines, exc V-8's, in a car originally powered by a Rotary Engine.

Piston motor swap?

Thread Tools
 
Search this Thread
 
Old 03-21-07, 09:11 PM
  #1  
Full Member

Thread Starter
 
ckm110789's Avatar
 
Join Date: Aug 2006
Location: Georgia
Posts: 64
Likes: 0
Received 0 Likes on 0 Posts
Piston motor swap?

Well I was thinking. This is just a thought dont hate me for it. But the 13b swap is a commen swap for my 1983 rx7. I was thinking about doing like a sr20 or a Ka swap. Would it be much more then a 13b swap and what would I be looking at to spend?
Old 03-21-07, 09:23 PM
  #2  
Eats, Sleeps, Dreams Rotary

iTrader: (17)
 
twinkletoes's Avatar
 
Join Date: Apr 2006
Location: Las Vegas, NV
Posts: 3,740
Likes: 0
Received 4 Likes on 2 Posts
Ask this in the other engine swaps section. They will know better than most of us and they wont be mad at you for swapping in a piston engine. Pm one of the four mods on the bottom of this forum to move this or just repost a thread where I told you. I think it will definately be more money to install a piston engine, and not as cool . God bless and hope everything goes well with whatever you do.
Old 03-21-07, 09:37 PM
  #3  
Old Fart Young at Heart

iTrader: (6)
 
trochoid's Avatar
 
Join Date: Apr 2004
Location: St Joe MO
Posts: 15,145
Likes: 0
Received 7 Likes on 7 Posts
This section strongly frowns on piston swaps, put your flame suit on. Depending on hp goals, your proposed swap could easily cost more than TII swap. I wouldn't worry about reposting in the other engine swap section, this one will soon be moved, lol.

Any particular reason why you wish to go piston instead of upgrading to a higher hp rotary engine? Perhaps if the questions and replys could cover the pros/cons of the swap, and kept civil, that's a hint guys, this thread might remain for an intelligent discussion.
Old 03-21-07, 09:50 PM
  #4  
Full Member

Thread Starter
 
ckm110789's Avatar
 
Join Date: Aug 2006
Location: Georgia
Posts: 64
Likes: 0
Received 0 Likes on 0 Posts
yes lets go with the pros and cons with the piston vs rotory swap...idk i just wanted to do something diff. I know more about piston cars than rotory. The 13b u have to actually let it get warmed up b4 u cut it off or else the engine will flood. And that would suck if i wanted to move it 3 ft
Old 03-21-07, 09:51 PM
  #5  
Have RX-7, will restore


iTrader: (91)
 
mazdaverx713b's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 21,702
Received 1,049 Likes on 889 Posts
i personally discourage a piston engine swap. the benifits of a rotary, in my opinion outweigh those of a piston engine in this particular car. the engine is what makes our cars pretty unique. the cost and fabrication you would have to do will be high and difficult. you must be VERY compitant with welding and fabricating, as well as with angles and measurement techniques to consider a piston engine, let alone a nissan engine. i discourage it if you dont have a thick wallet and honest experience with swaps and vehicle dynamics.
Old 03-21-07, 10:05 PM
  #6  
Full Member

Thread Starter
 
ckm110789's Avatar
 
Join Date: Aug 2006
Location: Georgia
Posts: 64
Likes: 0
Received 0 Likes on 0 Posts
I mean I like telling everyone yea I dont haev pistons and to see the look on their faces is funny. I go to high school were their mommy and daddy's give them cars and they dont know anything about them. Then when i tell them that i got a little 1.1l they dont think its possible. I love the desighn of the engine. I just feel like the rotary engine is something that you need to pay really close attention to in order to keep it running smoothly and at the age of 17 it would be hard to do
Old 03-21-07, 11:43 PM
  #7  
love the braaaap

 
85rotarypower's Avatar
 
Join Date: Jul 2003
Location: Bognor, Ontario
Posts: 3,771
Likes: 0
Received 3 Likes on 3 Posts
You don't have to pay any more attention to a 17 year old rotary as a 17 year old piston engine. Both have problems with age, both are about the same as far as reliability goes.

I'm not one to debate on the piston swaps, but I do have input on this. One engine I really would love to see swapped into a 1st gen would be a 3.8 turbo from a Buick GN. That engine is quite possibly the best engine ever produced next to the rotary. The power capability of it is through the roof, and even on stock internals can make 500hp and more torque than you would ever need. Stock power from one of those ranges between 250-275 based on what it was in. The Buick GNX got 275, while at the low side the Regal T-Type got about 250. In either trim the engine made about 350lb ft of torque, more than a similar powered V8 makes.

In the end, its personal preference, but I think the turbo 3.8 is definately a good swap for a 1st gen as its low, lighter than a V8, shorter than a I4 and makes more power than a lot of engines out there with only a few mods.

Actually, before I grew so attached to rotaries, I had planned on putting a RWD Buick Regal 3.8 V6 in my 82. I was going to put my own custom turbo kit on it and plan for about 300hp to the ground, with only about $5000 invested. You can't get a rotary that much power with that little money. The engine would have been dirt cheap, you can pick up low compression pistons from summit designed for a turbo for about $500, put new gaskets in all around, get a 5 speed from a S10 4.3 or Camaro 3.8 behind it, then a custom driveshaft and Ford 8.8 rear end swap.

Last edited by 85rotarypower; 03-21-07 at 11:49 PM.
Old 03-22-07, 01:23 AM
  #8  
Old Fart Young at Heart

iTrader: (6)
 
trochoid's Avatar
 
Join Date: Apr 2004
Location: St Joe MO
Posts: 15,145
Likes: 0
Received 7 Likes on 7 Posts
Couple of bones to pick on misinformation

I have a 2nd gen, FI, and do short start/stops to move it without letting it warm up at all. I also start it, and leave from the curb in less than 30 seconds, unless it's quite cold out. If the engine has good compression, properly tuned, good carb or non-leaking injectors on the SE, shutting it down without a full warmup is not a problem. It's more important to fully warm the engine before hitting the go pedal than it is for shutting it down.

Now as far as getting 300 hp for 5k, if one does all of thier own, as I do, with 5k to play with, I could be making 450-500 hp 300 hp is easy for under 3k if one shops right and does all of thier own work.
Old 03-22-07, 01:37 PM
  #9  
Full Member

 
American Rice's Avatar
 
Join Date: Jun 2005
Location: Fort Saskatchewan, Alberta, Canada
Posts: 197
Likes: 0
Received 0 Likes on 0 Posts
ya it doesn't cost an arm and a leg to do the swap at all. I am just about to drop my sbc 388 stroker engine with my 4l60 tranny into my car. I did all the work with a buddy helping me every now and then. I am without nitrous going to be running like 400 rwhp and like 500 ft lbs of torque. Those are just ball parked numbers. But I mean it is alot of fun and no one sees it coming when you ask someone to race and then start up your engine and the whole car is shaking because your cam is so big ! lol. But ya if you want some help or have questions about the conversion, feel free to ask me as I wont flame you about it as I did it and love it.
Old 04-04-07, 07:13 PM
  #10  
Junior Member

 
choi0706's Avatar
 
Join Date: Apr 2005
Location: TX
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
I have a Nissan SR20DET in my FD.. I just have an issue with the brake booster and turbo manifold touching..
Old 04-04-07, 09:07 PM
  #11  
Full Member

iTrader: (1)
 
Rotor Connection's Avatar
 
Join Date: Oct 2004
Location: Connecticut
Posts: 193
Likes: 0
Received 0 Likes on 0 Posts
here its my baby sr20det FC, i'll like to see your choi...



Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Azevedo
Other Engine Conversions - non V-8
26
03-01-19 09:19 PM
sleepydogz
Old School and Other Rotary
8
10-04-15 03:46 PM



Quick Reply: Piston motor swap?



All times are GMT -5. The time now is 12:20 PM.