Engine SWap 1st gen
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Full Member
Joined: Dec 2003
Posts: 68
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From: Michigan
Engine SWap 1st gen
I was just wondering if it's possible to fit a 20B 3 rotor engine into the 1st gen engine bay? with little modifications? and if so where could i go to getone? as well as the trans to accompany the power? i have done searches and found nothing? and if it wont work then what would be a good swap? plz give examples as well as where to get the engines?
holley guy
Joined: Feb 2003
Posts: 898
Likes: 1
From: K.C. MO
Not easy at all. Requires a ton of modification.
A good swap is a 13bt from a tubo second gen. I don't have enough time to explain what goes into it. I'll be back in a few hours if someone hasen't chimed in already.
-Marques
A good swap is a 13bt from a tubo second gen. I don't have enough time to explain what goes into it. I'll be back in a few hours if someone hasen't chimed in already.
-Marques
Rotary Enthusiast
Joined: Nov 2003
Posts: 814
Likes: 0
From: Canada
1st Gen may be the hardest RX-7 to swap a 20B into.
2nd should be easiest (least amount of modification necessary) and 3rd second (just because there are kits you can buy which include things like custom oil pans or custom subframes).
Regardless of which is easier, none are easy, all will require a decent amount of work (meaning more than expected at project start date).
Transmission your best option is probably a TII transmission. It will handle the power, are relatively easy to find a used one, and cheap to buy. An FD transmission (basically the same strength as a TII unit) would also work.
2nd should be easiest (least amount of modification necessary) and 3rd second (just because there are kits you can buy which include things like custom oil pans or custom subframes).
Regardless of which is easier, none are easy, all will require a decent amount of work (meaning more than expected at project start date).
Transmission your best option is probably a TII transmission. It will handle the power, are relatively easy to find a used one, and cheap to buy. An FD transmission (basically the same strength as a TII unit) would also work.
Find Racing
Joined: May 2001
Posts: 1,219
Likes: 0
From: Seattle, WA
Indeed, a 20b first gen is kinda ridiculously hard and definitely costly (don't think thousands, think ten-thousands).
The 13bt into the first gen is your best bet. Easy and has been done enough that there's plenty of knowledge about it.
Good luck.
The 13bt into the first gen is your best bet. Easy and has been done enough that there's plenty of knowledge about it.
Good luck.
holley guy
Joined: Feb 2003
Posts: 898
Likes: 1
From: K.C. MO
Read this, everything you will need to know and then some:
https://www.rx7club.com/showthread.p...threadid=65800
-Marques
https://www.rx7club.com/showthread.p...threadid=65800
-Marques
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Back from the dead
Joined: Jul 2003
Posts: 236
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From: Stockton, Ca
since we're in the subject, can you fit a tii engine, transmission and rear end into a first gen? pretty much a TII with a first gen body. is this possible and if so, how much work would be involved in a project like this?
Airflow is my life
Joined: Aug 2002
Posts: 6,736
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From: Orlando, Fl
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