Well, this isn’t the very first startup but the longest I have let it idle. I just rebuild the motor with all new seals, springs etc. I did a pineapple racing street port on the intake and exhaust. I am running a A-spec gt3582r with gutted cat and apexi N1 duals which is way too loud! My first question is does it sound ok? This is running on 850cc Primaries and I have a feeling it is rich. I didn’t put my wide band in yet because I didn't want all the assembly lube on it while it is burning off. Second on the first few startups there was a ton of smoke. I realize this is normal for the assembly lube is going to be burnt off. However after a few starts at first the smoke is minimal. However, as the car warms up it seems to get worse. Could this be all the assembly lube sitting in the exhaust burning off as the car comes up to temp? Or am I going to be pulling the motor out again?

Right after startup:
http://www.youtube.com/watch?v=cj_Fuf2iU2U

After running for a while:
http://www.youtube.com/watch?v=BZQhpshoD6k

 

The idle sounds a little sporadic, does the exhaust smell like anything?

 

The exhaust smells like oil / gas. I think the idle might be my PFC map. I havent messed with it to much. Anyone have a base map with 850cc primarys I can try to see if it idles better?

 

You have a base map(for 55cc stock injectors) with 850cc primary injectors???

 

Yes but I adjusted the injector size to 850 and -.04 lag. This is all I had to work with at the moment.

 

Anyone?

 

Sound the Crickets..

 

Hello???

 

1. Don't worry about the smoke until you can drive it around a bit. If you still have quite a bit of smoke after putting some miles on the engine, make sure you don't have a crankcase ventilation problem:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/oil-control-ring-failure-719153/

2. As for the idle:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-make-your-untuned-pfc-basemap-safer-idle-better-no-datalogit-needed-841706/

 

Without a datalog it's hard to say exactly what the idle issue is, but I'd say too much fuel and too little timing advance are likely at work. It's the same thing you run into on any ported or cammed engine.

If you are using a ported engine on the default map you are probably going to be very rich at idle. This is because you are pulling far less vacuum at idle. I bet you are pulling 12-14 inches of vac right now (-300-350 mm Hg) just by the sound of it, maybe even less than that. This puts you in a completely different cell on the fuel map than what the PFC basemap was designed for. You would be having a rich idle even if you didn't have the 850's. When you start idling richer than 12:1 there's a good chance it will smoke. If you want a smoother idle with that setup you will need to be at a minimum of 850rpm. And warmup idle tuning is a task in itself.