RX7 allnight

can i use the stock ignition setup when removing all the FI system? i would like to keep the cas and not have to put on a 12a dizzy ive searched and came up with a few different storys =/

s5 heres my list.

low pressure high volume pump.
FI plug kit.
oil inj plugs.
block off plate for OMP
600 CFM hollet with manifold from RB

g14novak

iTrader: (1)

Theirs a couple different ways you can go about doing it. Making a carb setup is pretty easy if you know what your doing. You do need to switch to the first gen ignition system, but the 13b one off a gsl-se. I could be wrong, but I don't think the 12a dizzy will work. Theirs a different amount of teeth. Basically, heres a list of what you need to make the car from efi to carb.

1. Intake manifold (theirs other brands besides RB to pick from, I'm currently running a Jaytech)
2. 1st gen ingnition (13b dizzy, coils, & wires)
2.5 low pressure pump. A stock 1st gen pump will work great. If you can get your hands on one of these, you won't need to run a regulator
3. omp blockoff
4. carb (a stock holley will work but theirs tricks that need to be done to it to make it run 100% properly on a rotary) If you get a holley, get one of the 1850 series.
5. Block off holes for primary injectors. These will cause huge vac leaks if you dont. Ask me how I know.
6. Make a kickstand for the throttle cable. Basically go to the junkyard and get the bar piece that is for what makes the alt tight. bend the tip, bam you have a throttle cable holder.

A lot of it isn't plug and play so your probably going to have to do something custom for the wiring to the coils. Here's a pic of my setup, maybe it can help you a little bit. Sorry, its a cell pic. It's not the nicest, but I've always been a function over form kind of person.

<a href="http://img.photobucket.com/albums/v112/Xenium911/07-09-09_1957.jpg"><img src="http://img.photobucket.com/albums/v112/Xenium911/07-09-09_1957.jpg" width="480" height="640"><a>

RX7 allnight

ive read you can keep the stock ecu to read the cas and control the coils.

walken

iTrader: (6)

i think the s5 ecu would **** a brick.

for the cost (unless you have these parts already) you could get a used haltech and have a sick n/a setup.

if you're doing this due to the s5 acting up. simplest fix is emissions delete and s4 manifolds.

texFCturboII

iTrader: (17)

The s5 ECU would **** a brick. Gonna have to go with a gsl-se front cover, oilpan, and 13b dizzy like mentioned above. Otherwise you'd have a OMP just kinda hangin around so the ECU doesnt limp out.

arghx

iTrader: (3)

if you kept the s5 ECU you would need to keep the AFM, since ignition timing under normal driving is usually determined by rpm and load (which is determined by the AFM). Which means a big hassle for a carb setup.

The amount of stuff you would need to keep distributorless ignition would essentially have you running fuel injection with almost everything but the injectors.

RX7 allnight

i read a member was using a carb with the cas was this one a s4?
i pmed and waiting back...

RX7 allnight

rx7man13b "I run a carb and left the CAS. It runs great and idles smooth. From what i read the ECU needs a TPS signal and MAF to adjust timing but my car has neither. "


ok if this is true wouldnt i be able to get a rtek chip that deletes the OMP errors?

RacerXtreme7

iTrader: (2)

I ran a Dellort'o side draft on a ported 6 port years ago using the stock ignition. The car was FAST! I had done a LOT of mods to the engine. I had to fasion a TPS mount and use the stock TPS. I never did work all the bugs out of the ignition and/or the carb. Light load had bucking to it no matter what I did with jetting/mixture so i assume it was ignition perhaps. I had functioning aux ports. I got tired of dicking with carbs and went to turbo/after market fuel injection.

I'd suggest going 13b dizzy route if your hell bent on carbs or keep it fuel injected. BTW, after you buy a carb and manifolds and new fuel system components (fuel pump, low pres reg, etc etc) you could have just bought a Mega Squirt a couple times over (and they make plug and play now) or even a nice used Haltech or Wolf.

~Mike........

g14novak

iTrader: (1)

Yeah. I'll admit, going carb definitely isn't cheap. I'd really only recommend it as a cheap way to have a running car if you ever go to a motor thats full bridge.

And the 13b dizzy really isnt a bad ignition system at all. And you don't need to change the front cover. Just pull out the CAS, drop in the dizzy. Dont change the front cover just for the omp. If you do, go s4 so you CAN have a OMP.

Bugeye RX

I just finished swapping from EFI to carbs on a 1987 S4 due to clearance issues I had install this type of motor in a 1959 Austin Healy. Used a twin coils and dizzy with ignitors. I plugged the injectors and made block-off covers for OMP and ERG. Haven't fired her up yet and I'm sure there will be a few bugs to work out. Here's a few picture of the beast. Good Luck.