How hard is it to convert a carb 13b to a fuel injected? If it is even possible.

 

I tried looking for threads but there always from fuel injected to carb hah.

 

Things you will need on an EFI setup:

OEM High pressure fuel pump
OEM baffled gas tank
OEM or aftermarket high pressure fuel regulator
OEM intake manifold and fuel injectors ( get the injectors cleaned at Witchhunter )
NEW o2 sensor - rx7.com
ECU - either OEM or standalone
Crank angle sensor
Ignition coils
MAF or related air flow meter (matching requirement for ECU of your choice - MAP sensor for standalones)
High pressure fuel line if they swapped it for low pressure line. Use proper EFI hose clamps.

How much of the factory harness is in tact? If its all there you've got WAY less work to do, just find someone doing a turbo swap (everyone) and take their OEM n/a system off their hands. Clean everything, freshen up the harness plugs and use some electric bulb grease, make sure grounds check good.

You will probably break the injector plugs pulling them. You can easily re-pin some new plugs, available from a forum member here.

You keeping emissions? That adds significant complexity.

I'm probably forgetting a few small things.

 

All 13B's came fuel injected, so you just install the stock parts. It all depends how much needs to be 'undone' from the previous conversion.

 

Ok let me rephrase the question. What could I use off off my NA S5 engine on to a turbo 13b carb to get it to run. I'm seeing that most of the list you have is already on my NA motor so do you know what I could use off of it?

 

Lol that's not rephrasing - that's a completely different setup!

For blowthrough carb call Robert @ Rotaryshack.

You'll need the high pressure pump
Return style, rising rate fuel pressure regulator
Boost-prepped carb
Carb hat
Remove 6port actuators
Don't run too much boost - the NA high compression rotors are only good for minimal boost (I don't know exact #s)

If you could tradesies for an s4 turbo keg you're set. Port the s4 turbo manifold waste gate and you're good for 12+ psi. I think I was running 12-14

You SHOULD get:
Front mount intercooler

 

what.

you have
1. na s5 engine..
2. turbo 13b Carb. so you have a carb from a turbo 13b setup( which is far from factory)
you don't know what wrong with the turbo 13b carb, but you want to put it on your s5 engine.

english man, cmon.

you probably ment you have a s4 turbo engine, carb'd... you tell us whats wrong with it, and we'll tell you that nothing from your s5 n/a is a viable option to use.

 

False.

13bap came carbureted, and was found in the 1975–1980 Cosmo AP, 1974-1977 REPU, 1975–1977 Roadpacer, 1973–1978 RX4 and the 1975–1980 RX5.

Any newer 13b, including the renesis 13b found in the rx8, is fuel injected.

I'm confused as to what the origional poster is trying to do. Your probably better off keeping the car the way it is. Carburetors are not bad. They seem to have a bad rep just because people do not use them often anymore, similar to 2-stroke engines and the wankel.

 

+1 tuscanidream - Yah carbs are just fine.

Slightly lower economy, and you only have one IDEAL tune point (the jets) whereas EFI can be tuned across the entire power band. But driveability is going to be fantastic, you'll get excellent power (much more than stock!) and a MUCH simpler engine bay.

But unless you plan on getting into custom tuning - or paying for custom tuning - you'll probably ultimately be happier (and less poor) sticking with the carb.

 

Sorry for all the confusion guys. I'm still fairly new to rotarys and I'm still learning as I go. So please bear with my noob *** posts ha.

So if the block that I'm trying to change over to EFI might be an s4 block so pretty much none of my S5 engine components will be transferable to the s4 block.

All I'm trying to do with the s4 block is restore it and get it in good condition and eventually swap it into my car. I don't really care about emissions or anything since I have a smog guy so passing smog isn't a factor.

Would it be worth trying to convert it over from the carb over to regular EFI? I'm just trying to rebuild the block and learn as I go you know.

Again sorry if I ask obvious questions and stuff on here I'm just trying to get straight to the point.

Ill post more pictures of the s4 block later tonight

 

Anyone wanna tell me how I can tell if this is a turbo block or not?

 

It has 6 intake ports therefore its a non turbo block, if it was Turbo the outside ports would be one large port rather than two small ones.

Also the Diffusers on the exhaust ports are only used on na's.

Hope that helps.