Vehicle: 1991 JDM Rx7 Turbo
Reason: Clean up engine bay and a bit of hp
Mods: 3" dp to highflow cat( cat will be taken out during emission removal) 3"cat back, HKS 2 layer intake

I have a few questions regarding the removal of emissions. What exactly is involved with this? How many components are there beside the airpump?

I have read a few threads that mentions block off plates and some that say just rip out the airpump... At any rate i want to do a clean and professional job.

Also does emissions removal cause any side effects? like unstable idle etc?

Is it really worth getting rid of absolutly every component of the emission system or im i just wasting my time?

Thanks in advance,

Ben

 

I haven't done it to a turbo car, But the emissions on my 87 na was a bunch of metal vac lines under the intake manifold. I simply ran only the vac lines that I needed(getting rid of all the solenoids) and I ran the fuel lines straight to the rails. I bought a blockoff plate for the Air check valves, and I put a nickle where the bac sits and then I jb welded around it. And for my egr, I just bought a blockoff plate and sealed it properly (as a side note, the egr screw is a very good ground for the computer).

One of the most important things is to FIND out where the vac lines go. They might look like Live manifold vac but I might just be ported vac. So take a air compressor and figure out where they go. To be careful you might want to check for vac leaks, use propane or carb cleaner and spray everything while the car is running to check. If the idle goes up then you got your culprit. To make sure even more and if you have a turbo then try this out, it's a homemade intake manifold pressure tester.
http://www.stealth316.com/2-pressuretester.htm

as for making things unstable I have no problems with the removed emissions

 

Thanks for the post, but anybody have any info on a turbo car?

 

People seem to remove emissions for weight reduction and for a cleaner, simpler engine bay. Not for power. Except removing the cat does give some power. I would imagine that a turbo would be the same as an N/A in terms of emissions. Sorry I can't help beyond that.

 

removing emissions doesnt mess with the idle unless you messed up and involves removing the ACV, air pump, EGR valve and rats nest aka the crap load of tubes and wires on the spark plug side of the engine you should also remove the sub-zero assist since its useless anyway theres a vac diagram for after emissions are removed floating around some where and if you cant find it rotaryressurection.com has a damn good guide for it

 

I appreciate the responses.. but is there anybody out there that is really knowledgable on the 13b turbo engine?

I would like to get this job done asap

Thanks

 

Rotary resurretion has a write up on it. Basically you simplify the throttle body, remove the ACV and air pump and the nasty *** vacuum rack under the manifolds. You can remove the BAC if you want but i'd keep it.

 

So what exactly does the BAC valve do... i know it controls idle.. but how does it work exactly.. and how will removing it affect the engine?