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

rb26 or sr20?

Thread Tools
 
Search this Thread
 
Old Apr 22, 2007 | 09:33 PM
  #1  
illgraff's Avatar
Thread Starter
saving up for a gen III
 
Joined: Feb 2007
Posts: 7
Likes: 0
From: Los Angeles, CA
rb26 or sr20?

has anyone done a swap with a nissan engine? any estimates on prices for the whole procedure?
Reply
Old Apr 22, 2007 | 09:42 PM
  #2  
FC3S Murray's Avatar
5 and counting.
Tenured Member 15 Years
iTrader: (7)
 
Joined: Jan 2006
Posts: 1,651
Likes: 4
From: Montana
Maybe try a Nissan forum. Doubt you will see that here bro.
Reply
Old Apr 22, 2007 | 09:43 PM
  #3  
turboefini88's Avatar
Long rifle.
Tenured Member 05 Years
iTrader: (1)
 
Joined: Aug 2006
Posts: 653
Likes: 0
From: pittsburgh
ITs been done. One of the DA guys was running an SR in his FC before Lindsay, a DA ace, got it. Why bother though? Ill never understand people swapping out a rotary from an RX 7.
Reply
Old Apr 22, 2007 | 09:53 PM
  #4  
tr4c3's Avatar
Guitarist for Hire
Tenured Member 15 Years
 
Joined: Sep 2004
Posts: 935
Likes: 0
From: Central FL
Check out the other engine swap forum.

Edit: https://www.rx7club.com/forumdisplay.php?f=118
Reply
Old Apr 23, 2007 | 12:59 AM
  #5  
illgraff's Avatar
Thread Starter
saving up for a gen III
 
Joined: Feb 2007
Posts: 7
Likes: 0
From: Los Angeles, CA
thanks guys
Reply
Old Apr 23, 2007 | 06:57 AM
  #6  
ProjectR13B's Avatar
No es bueno.
Tenured Member 15 Years
iTrader: (1)
 
Joined: Oct 2005
Posts: 1,298
Likes: 0
From: Hampton, VA
seen a KA, wouldnt mind seeing an RB25 or RB 26. that could be pretty cool. or even a 2JZ
Reply
Old Apr 23, 2007 | 07:08 AM
  #7  
My5ABaby's Avatar
Rotaries confuse me
Tenured Member 10 Years
iTrader: (7)
 
Joined: May 2006
Posts: 4,219
Likes: 3
From: Murfreesboro, TN
I understand (although don't agree with) swapping in a V8. However, I don't understand swapping in a rb26 or sr20.
Reply
Old Apr 23, 2007 | 08:42 AM
  #8  
tr4c3's Avatar
Guitarist for Hire
Tenured Member 15 Years
 
Joined: Sep 2004
Posts: 935
Likes: 0
From: Central FL
Originally Posted by My5ABaby
I understand (although don't agree with) swapping in a V8. However, I don't understand swapping in a rb26 or sr20.
SR20 is perfect lol. Swap in a s13 redtop, and after going through all that hassle, you'll be at about the same or maybe a little more hp than a jspec s5 motor.
Reply
Old Apr 23, 2007 | 09:48 AM
  #9  
Iwanna300z's Avatar
You own a honda...ha
 
Joined: Apr 2007
Posts: 8
Likes: 0
From: Flint,MI
If you do it go with a sr20det over the rb26dett. I looked in to doing a rb26 swap in my 300zx(Im building the vg30dett up for less just a stock rb26 swap would cost) and unless you have alot of time and money the rb is out. The sr20 is a workhorse, build correctly it can handle big hp, parts are all over, and cheap. also the sr wieghts less. Plus with the rb26 not only will you have to pay top dollar for the motor but you will also have to buy a rb25det rwd trans, which is become a pain. most of the trans on the rb25 being shipped over here are actually rb20 trans that are not as good and will not support the power of a rb26. and finally since it was mentioned you could do a KA24det set up, the motor and trans can be bought for less then both the sr20 and rb26 and again if built right they can be superior to a sr20.just a my 2 cents.
Reply
Old Apr 23, 2007 | 10:04 AM
  #10  
JDMRevolution's Avatar
Make that money!
Tenured Member 10 Years
iTrader: (6)
 
Joined: Aug 2006
Posts: 978
Likes: 0
From: Miami,fl
Originally Posted by illgraff
has anyone done a swap with a nissan engine? any estimates on prices for the whole procedure?

Why would you want to do that? Unless you already have a built motor waiting in the garage, i would reconsider spending the time and money dropping any nissan engine.

I have seen a vq35 in an fd before though.

Reply
Old Apr 24, 2007 | 12:25 AM
  #11  
88fc3c's Avatar
Junior Member
 
Joined: Mar 2007
Posts: 38
Likes: 0
From: riverside
i know tony angelo runs a sr20det in his fd, but why would u purt cylinders in? i dunno, maybe its just me
Reply
Old Apr 24, 2007 | 12:14 PM
  #12  
rotarybeast7's Avatar
Junior Member
Tenured Member 05 Years
 
Joined: Oct 2006
Posts: 45
Likes: 0
From: Wisconsin mil-town
don't get me wrong a sr20 is an amazing motor but paying the money to swap it u would be better off buying a 240 with an sr20, i think if you have a rx7 u should keep a rotary engine cause thats what makes rx7's so amazing.
Reply
Old Apr 25, 2007 | 01:34 PM
  #13  
JDMRevolution's Avatar
Make that money!
Tenured Member 10 Years
iTrader: (6)
 
Joined: Aug 2006
Posts: 978
Likes: 0
From: Miami,fl
Originally Posted by rotarybeast7
don't get me wrong a sr20 is an amazing motor but paying the money to swap it u would be better off buying a 240 with an sr20, i think if you have a rx7 u should keep a rotary engine cause thats what makes rx7's so amazing.

I do agree that if you are planning on swapping a sr20, you might be better just buying a 240 with an sr20.

However, i dont agree on what you said about the rotary engine being the main component behind what makes an rx7 so amazing. I think these cars are amazing for their styling and for the way they handle. Though the rotary is an amazing engine and its great to be different, it has many flaws and suffers from lack of torque.
Reply
Old Apr 25, 2007 | 01:40 PM
  #14  
Pat McGroin's Avatar
Sushi ******!
Tenured Member 05 Years
 
Joined: Dec 2004
Posts: 597
Likes: 0
From: Florida
Originally Posted by rotarybeast7
don't get me wrong a sr20 is an amazing motor but paying the money to swap it u would be better off buying a 240 with an sr20, i think if you have a rx7 u should keep a rotary engine cause thats what makes rx7's so amazing.

Yeah forget about how RX-7's look beautiful and not to mention their great handling.

SR20 over the rb26. Rb26's are way overpriced, and the money you save you'll be able to get it to the same power easily, less weight, easier to find parts.

Unless you're balling, and know how to do some fabbing, go ahead with the rb26.
Reply
Old Apr 26, 2007 | 12:16 PM
  #15  
rotarybeast7's Avatar
Junior Member
Tenured Member 05 Years
 
Joined: Oct 2006
Posts: 45
Likes: 0
From: Wisconsin mil-town
i agree there is more to rx7s then just the rotary engine and i think its still cool to do crazy swaps(props to LS1 rx7's), but 13b are light and doesn't swaping the engines screw up the weight ratio which causes worse handling??
Reply
Old Apr 26, 2007 | 12:48 PM
  #16  
Zar's Avatar
Zar
You Fail
Tenured Member 10 Years
 
Joined: Apr 2007
Posts: 83
Likes: 0
From: Bay Area
If you were to get an rb, go with the 25. There isn't much more to the 26.

Sr's can be found cheap now a days. Aftermarket it high for them. Plus there are some parts you can pick up at your local auto store. Can't do that with an rb.

If It were me, I'd go with a ka24de and turbo charge it. Tons of torque and smooth pull.
Reply
Old Apr 27, 2007 | 09:04 PM
  #17  
dbragg's Avatar
Say hello to Mr.Wankel
Tenured Member 05 Years
iTrader: (7)
 
Joined: Nov 2004
Posts: 5,962
Likes: 1
From: Cartersville, Ga
i vote SR20. for the reasons stated above. its cheaper, a tank, a huge market, lighter, and easier to get.

i know a SR swap into a 1st gen is easy, very easy. ill be doing a swap of the sort to my SA within a couple years. depends on how broke i am while im in college.
Reply
Old May 3, 2007 | 05:33 PM
  #18  
fd3s_jerry's Avatar
Senior Member
Tenured Member 05 Years
 
Joined: Oct 2006
Posts: 352
Likes: 1
From: minot, ND
Originally Posted by Pat McGroin
Yeah forget about how RX-7's look beautiful and not to mention their great handling.

SR20 over the rb26. Rb26's are way overpriced, and the money you save you'll be able to get it to the same power easily, less weight, easier to find parts.

Unless you're balling, and know how to do some fabbing, go ahead with the rb26.
actually, as someone who has priced this **** out, rb26 all the way. a 240 with an sr20 swap is lucky to get 200 hp to the wheels with a stock swap. a 240 with a stock rb26 is over 300 dyno'd whp, no bolt ons, nothing. add bolt ons to both motors, and you're way better off with the rb. it's not just cost, but cost vs. power, and 100 extra hp stock is a good starting point. plus, 500 hp rb26's are pretty streetable, but getting an sr20 to 500 hp takes more money than the cost of building the rb. the sr20 is overrated anyway.
Reply
Old May 3, 2007 | 10:31 PM
  #19  
driftking777's Avatar
Senior Member
Tenured Member 15 Years
iTrader: (1)
 
Joined: Oct 2005
Posts: 548
Likes: 0
From: south dakota
your kinda going off the assumption that the motor even remotely cost the same, but they dont. so you cant realy 100% go off of cost vs power.

a 400whp SR is easy to attain with less than 6k, however a 400whp RB will still cost you 7k+, as most RB26's cost around 4k plus by them selves. SR's not so much really.
Reply
Old May 3, 2007 | 10:32 PM
  #20  
driftking777's Avatar
Senior Member
Tenured Member 15 Years
iTrader: (1)
 
Joined: Oct 2005
Posts: 548
Likes: 0
From: south dakota
however i will agree, if your looking to go above 450whp, i would recommend a bigger plateform than a SR...
Reply
Old May 3, 2007 | 10:44 PM
  #21  
fd3s_jerry's Avatar
Senior Member
Tenured Member 05 Years
 
Joined: Oct 2006
Posts: 352
Likes: 1
From: minot, ND
Originally Posted by driftking777
your kinda going off the assumption that the motor even remotely cost the same, but they dont. so you cant realy 100% go off of cost vs power.

a 400whp SR is easy to attain with less than 6k, however a 400whp RB will still cost you 7k+, as most RB26's cost around 4k plus by them selves. SR's not so much really.
so, what's the cost of getting an sr20 AND building it to a reliable 400 hp, vs getting the rb26 and doing so? at about 400 hp, it's pretty much breaking even, and above that, the rb26 wins. plus higher redline.
Reply
Old May 4, 2007 | 10:32 AM
  #22  
Iwanna300z's Avatar
You own a honda...ha
 
Joined: Apr 2007
Posts: 8
Likes: 0
From: Flint,MI
How about just answering one simple question first. What are you planning on doing with the car? Will It be a drag car? street car? Auto X car? Drift car? No one can tell you whats best for your build until you tell them what you'll be doing with it. Right now its all been a power/ cost issuse.This is just getting alittle stupid, I mean, if your looking for aton of hp then yes go with the RB. If its going to be a street car or daily drive then with out a doubt go with a SR, for the simple reason of if it breaks, part are everywhere. Theres pros and cons to both sides, but you need to decide what your plans are for the car before deciding on a motor.

Last edited by Iwanna300z; May 4, 2007 at 10:42 AM.
Reply
Old May 4, 2007 | 04:49 PM
  #23  
driftking777's Avatar
Senior Member
Tenured Member 15 Years
iTrader: (1)
 
Joined: Oct 2005
Posts: 548
Likes: 0
From: south dakota
Originally Posted by Iwanna300z
How about just answering one simple question first. What are you planning on doing with the car? Will It be a drag car? street car? Auto X car? Drift car? No one can tell you whats best for your build until you tell them what you'll be doing with it. Right now its all been a power/ cost issuse.This is just getting alittle stupid, I mean, if your looking for aton of hp then yes go with the RB. If its going to be a street car or daily drive then with out a doubt go with a SR, for the simple reason of if it breaks, part are everywhere. Theres pros and cons to both sides, but you need to decide what your plans are for the car before deciding on a motor.
this is true...motors are def better for one thing than another...so tell us what you want it for..


As for fd3s_jerry I understand what your saying with if you built BOTH motors you would undoubtly have a stronger motor with the RB26, but stock internaled SR's hold 400whp all day long with nothing but a tune and a bigger turbo. So unless hes looking at getting over 450+whp RB shouldnt even be an option for him, otherwise all it would be is a waste of money.
Reply
Old May 18, 2007 | 06:29 AM
  #24  
beqa16v's Avatar
Senior Member
Tenured Member 05 Years
 
Joined: Sep 2006
Posts: 393
Likes: 0
From: Tbilisi
sorry for bringing this back but guys do you have any links or exect info what is needed to swap SR20 in FD. i'm interested in this setup. i'm considering importing RX7 from Japan and if the engine blows, i can not repair it considering my location. SR 20 is a good engine, much lighter then RB25 and better overal for RX7
Reply
Old May 18, 2007 | 08:53 AM
  #25  
Zero R's Avatar
Just in time to die
Tenured Member 10 Years
iTrader: (1)
 
Joined: Nov 2001
Posts: 4,143
Likes: 2
From: look behind you
Wow so many of you guys saying SR over RB. How many of you have actually built both? No what serious issues can arrise with either?? I have done quite few SR swaps and they are great motors but if you do some damage to it, good luck saving it. I have also built many RB motors 25's 26's and 30's There only flaw is there price built right it is a amazing motor equally as impressive as 2J's and certainly more easily salvageable than a SR from my experience.

-S-
Reply



All times are GMT -5. The time now is 09:25 PM.