fast2g

Okay heres my question im going to buy a 20b stock engine from one of the jdm
web sites. but the i dont want this engine to be fuel injected instead i want it
carburated with a peripheral port. is that possible yes or no... the car is going to be an all motor dragster
and yes i will be doing suspension shortly and probably cut the rear inner tubs for some good slicks....the other reason why i want it carb is so that the wiring just hooks up....
... but if you guys can tell me an easy way to hook up a painless
to an ecu im open to suggestion thanks guys. sorry for the big pics forgot to change setting on camera..

Icemark

Yes it is possible, The original 89-90 GTUs model (note the small s- don't confuse with a GTU) was supposed to be a non turbo 20B.

and no I can't tell you how to wire a painless body harness to a ECU

Aaron Cake

iTrader: (1)

Here's the thing. If you have to ask if it is possible, then I suggest you try another project.

Just to put a 20B into a 2nd gen is a fairly involved process for someone who needs to ask whether it is possible to carburate an engine. You'll need to make a set of mounts to stick it in there, alter the sway bar, pick the correct flywheel/clutch combination and do some other stuff I'm probably forgetting. You'll need to fabricate a header to run it NA, and then fabricate an entire intake manifold to run on the carb of your choice. Not to mention the rebuild and the machine work in making a set of peripheral port housings. You'll also want to source 3 NA S5 rotors as the rotors in the stock 20B are low compression units set up for forced induction.

You'll need to find an ignition system to light it off. RB sells a 20B distributor that will cost you almost as much as it will to buy the parts to rebuild the engine.

The car will be ungodly loud as you need basically a wide open exhaust to allow a peripheral port engine to breath. Intake noise will be just as bad.

fast2g

well i know how to wire the engine to the painless
and the possible part was just to get suggestion.
so if i get a 20b you said get it running on a turbo because of the
low compression set up(i also was planning on going turbo but ,moneys tight, and i
did not know if it was possible on the carburation set up) now again with the carb
is because i know how to tune cars better that are carb.
now please put up the web sites (if you know them) that have what i need to
do this build thanks
also let me add that i know its going to take time to do all this
and i got patience. and no im not one of those guys that is planning
on doing some thing with out experience also this car again is going to
be a drag car so the fabrication and all that is easy for me the challenge
right now seems to be the engine. send me parts list or if theres a thread that has
it already post it up. again thanks for you patience to what you think is a newbie
to the rx7s

RotaryRocket88

iTrader: (7)

20b forum: https://www.rx7club.com/20b-forum-95/

GtoRX7's semi p-port NA FD:
https://www.rx7club.com/20b-forum-95/my-rx-7-done-cup-holders-3-rotor-semi-p-port-n-setup-stock-subframe-454580/
https://www.rx7club.com/20b-forum-95/updated-thread-n-3-rotor-v2-749005/

^ This will have its differences obviously because it's an FD and it's a semi p-port, but it has a ton of good info and pictures. Be prepared to drop a lot of cash on this project.

White_Shadows

If money is tight a 20b is not a good idea. Half the price to get a TII or a Renesis put in there.

Aaron Cake

iTrader: (1)

I don't think you realize how big of a project you are taking on.

Setting it up as a turbocharged engine is 100% different then as an NA engine and has totally different fuel requirements.

You need to make a decision which way to go because that will guide the rest of the project.

You mentioned that money is tight. Then my advice is to STOP RIGHT NOW AND WAIT. Bottom line, you are looking at a $20,000 project. You might be able to squeak by at $15K if you do most of the work yourself. If you beg, borrow, scrounge and steal parts, you might get by at $10K. Few 20B installations are ever completed for under $15K. Most blow that number out of the water.

Here is your opportunity to learn then. You will will spend as much on a large carb, a dizzy and associated ignition hardware then you would on an entry level EMS system like the Microtech or Haltech. The carb will also seriously limit your options when going forced induction, if that is what you choose. Also keep in mind that carbs suck for high overlap, low vacuum ports like peripheral.

Every 20B installation is a custom job that takes months or years to complete. In the post above mine, you will find links to the 20B subforum on this website. There are over 10 years worth of threads located there, plus an extensive FAQ.

You must understand that there is no "parts list". This is not like bolting a bigger V8 into a Mustang chassis.

fast2g

well heres why im still going to take on this project im only 17 and yes compare to you guys that young.so yeah i got time to waste
i dont have no where else to spend my money on and i got patience and if theres no parts list then i guess
its on to the shop fabricate some parts and also understand that yes im young *** kid compared to
you guys but i know how to work around cars so im here for advice and like i said in the beginning this
car is for the drag strip not a street car so its not going to be going any where for a long *** time let say oh five years
yeah moneys tight but there's a lot of time to make some more.
thanks for your help and advice.

hanman

20b is a really bad idea. Unless you have money to burn. Check out David Hayes 20b thread in the third gen section. Then you will get an idea of what you are really looking at.

fast2g

okay since every one is against me on the 20 b how about the 13b pp...
also how much hp does the 13b pp make compare to the 20 b thank you guys