Keith

I just got an 88 with the racing beat carb setup. The car is using the stock ecu for spark. The car is slower than an EFI setup by a longshot. I read somewhere that a bracket is supposed to be fabbed for the TPS but am not sure about it. It has a fuel pressure regulator also. What could I be missing here? I thought this setup was supposed to be faster then stock EFI.

Keith

Pics of setup

eddierotary

iTrader: (7)

i have one and i dont like it at all, plus it doesnt run right with stock CAS, you have to downgrade to a 81-85 rx7 dizzy in order to get it running right, my self im changing to fuel injection again because is a total mistake changing it

Keith

So thats why it runs like ****. Well I guess I will try to get a 1st gen dizzy in there>thanks

Rancid7

i switched over to a 4bbl carb set-up with an edelbrock 600cfm carb with a racing beat manifold . While it feels more powerful up top , you lose too much low and mid-range power . I gave the car to my cousin and we are switching back to the stock fuel injection . Carb might be good for a track car but as a daily driver we found it to be a headache , anyway good luck with your set-up i hope it works out for you ... if not you can always go back to stock efi or stand alone efi .

Rancid7

we didn't have any problems with the stock cas , i do have an 81-85 dizzy and transistor mod board but i didn't see a reason to switch , anyway its going back to stock .

Keith

You would think that without the TPS being hooked up the spark would be timed incorrectly because the ECU doesent know whats going on. What is involved in switching to 81-85 dizzy?

eddierotary

iTrader: (7)

TPS controls the fuel sistem on the FI, doesnt control the timing, the timing is control by the RPM, A/F ratio and vaccum. other than that the ecu set the spark as stock settings, you just have to go from that and move the CAS until the car runs better, but in my opinion and is how it worked on my car the 81-85 dizzy work better that CAS

Alex6969

i don't see why people insist on putting carbs in 2nd gens

NZConvertible

Why not try to get 2nd Gen EFI in there?

sc0rp7

iTrader: (3)

I may get scolded fore saying this, but i believe if you tune a carb correctly and run a Dizzy with some mods to it, you can actually gain some power and maintain some driveability. I know that RB sells them with the implemented description that it is ideal for our vehicles, but in the carb tuning i have done on older cars amd/or helped with, its al about the jetting/tuning, i bet you could get it pretty much to your liking if you tweaked it correctly. It is easier to switch to stock EFI, but i personally dislike the stock ecu, it is great in its simplicity though. If there is a problem with it, it is probably not tuned ideally for your particular car. just my thought on the subject.

- chris

Jager

iTrader: (10)

Because they don't know any better in the case of a street car.

A drag/track car would fine since the conditions aren't varied and it keeps costs down.

Keith

Im going to mess with the car today. The guy I bought it from said he messed with the carb trying to tune it, so I will give it a shot too. Im also not sure if the choke is opening when warm. Oh well If I cant get it in tune I will put the EFI back on there and be done with it.

Aaron Cake

iTrader: (1)

Without all it's sensor, the stock ECU is not advancing timing.

Get a distributer from a later 1st gen and then you should have some of your power back.

Keep in mind that you will always make more power with EFI. About $500 and you can get a Megasquirt and have full control over your fuel and spark (assuming you know how to tune it).