CIS to EFI kit

[tbitz]

Damion,

You can only run 4 low impedance injectors with the stock megasquirt. To use 6 low impedance injectors you need an external flyback board which I don't supply.

Cheers,

[steand]

OK boys.

Now some of you have installed Megasquirt, and some of you have probably tuned the VE tables, and warm up parameters, acceleration parameters a.s.o.

I'm in the starting phase of installing a VEMS efi controller; the one referred to a few pages back in this thread. The open project is on vems efi project .

The "vems" as it's called or "GenBoard ver. 3.2" is a enhanced Megasquirt vith a16MHz CPU Board, capaple of controlling 8 injectors fully sequentially, and also control ignition (up to 8 coils), idle controll, and it also control a Wide bannd O2 sensor, so you can read A/F ratios while running, and use for tuning. Se the link for further info, but be WARNED!, its rather complicated, only for people who knows about electronics, and computers.

I like to see the VE table that you people with Megasqurt has. And i like to se the warm up enrichment parameters, to have some starting values to use when i get the "vems" to work in the future.

I also like to hear about experience with tuning VE, acceleration enrichment, WU parameters and the like.

And has anyone off you had Megasquirt or other ignition control system to control ignition yet ?? and whats the experiences / ignition maps.

Has anyone measured with a lambda sonde (A/F ratio measurement) as function of rpm and MAP, a so called Lambda table ??

[antares]

tbitz:
has anyone that you know of been able to use your set-up in california and still pass carb smog inspections? does anyone know if one has to have the stock system installed or are they only interested in overall emmissions data falling into or below their ranges to pass? sinece your system with megasquirt and attachments would allow one to dial-in performance parrameters then i dont see a problem. I have seen some of the completed set-ups where the air box and lid is still in place and looks stock. I have a 79 and would have to have the stock air pump, reactors, cat and muffler in place. any input out there would be appreciated.

antares
fatnwide

[banjomike]

Based on my experiences with getting smogged, I think that as long as the smog pump, the egr valve, and the catalyst are all in place and the timing is set to factory '79 specs, you should be able to pass the visual inspection. I would be very suprised if a tech would notice the fuel rails as long as it was a nice clean install.

[350HP930]

So true, plus with the ability to easily load new maps you could set up a tweaked program to make it easier to pass smog.

[antares]

I have asked this before and have not received any replies. perhaps there in not an answer as of yet. however i will ask it again just in case someone may know the answer. Does anyone know if the blitz set-up with megasquirt configurations once installed as to replace CIS, pass California Smog Tests? Has anyone done accomplished this out here in California?

Any Feedback would be appreciated.

antares

fatnwide

[tbitz]

antares,

I don't know of anyone that has gone through this smog test with the BITZ Racing kit.

Tony

[EdT82SC]

To pass smog in California your emmissions and fuel delivery equipment must be approved by CARB (California Air Resources Board). Since Tony's kit is not CARB approved it will not pass smog. You could use another injection system that is approved, but those are all more expensive. Pat Williams Racing has a kit they sell for the 930 that is CARB approved, and I read late last year that they were working on a kit for non-turbo CIS cars.

California tries to force the retirement of older cars that pollute more by making it difficult to update the cars. Event if changing out CIS for EFI cut your emmisions in half it still pollutes a lot more than a modern car. So they purposefully make our cars less and less desireable over time in the hopes that they will see the scrap heap.

[Lothar]

CARB should be restructured and renamed as the California Rescue the Air Program or CRAP. The ability of the state to create totally ineffective and maximally intrusive beauracracy is mind numbing.

Whether you deliver the fuel by means of the original equipment or some alternate means, isn't what comes out of the tailpipe the ultimate issue?

That said, states like Florida and South Carolina have wised up to the fact that modern cars will not produce excessive pollution as long as the check engine light is not on. And, since OBDII vehicles now make up the majority of cars, the few left are not worth the effort. They will simply disappear over time anyway.

[anthony]

But for practical purposes I highly doubt a smog place would be able to tell that you are using aftermarket fuel injection. As long as all the original smog devices (smog pump, cat, O2 sensor) are on the car I doubt one would fail the visual inspection.

[rick conrath]

Not all people that work at the smog checks are dopes. Some of them know the difference between CIS and EFI...at least in Virginia they do.
The reality is that my 930(without any devices) ran cleaner on the smog check than my SC, cats, air pump and all. Fortunately my car is now exempt.
Rick
'78 930

[anthony]

In CA they aren't looking that closely. They have a checklist for smog equipment that they go through. Anyway, a smog jockey would have to be extremely familiar with porsches to tell that this wasn't stock:

[DavidI]

Anthony, have you gone through the smog process? I am very interested in this as well, but the smog nazis have mind control over me. I would hate to do the conversion, have it run stronger and better, only to have to reconvert to CIS.

David

[anthony]

I haven't had to smog my 911 yet but I've never had a problem smogging all my cars. With the 914 I almost got turned away because they didn't know the car. I had to show the guy how to check the timing on it and where he could find the smog stickers.

They do a visual check for the external things they can see: cat, o2 sensor, egr valve, air pump, evap canister, timing, check engine light, etc. It just depends on what your car has. And it has to have all the original stuff to pass.

They are not though going to check on whether you have the orignal fuel injection computer.

[EdT82SC]

I read a few months back that they were going to look harder for "illegal fuel rails" in reaction to the aftermarket fuel systems on rice rockets. I think those pretty rails that Tony provides may attract attention. Maybe if they were painted flat black or grey or something like that they would escape notice.

[CindyDuck]

I put my car on the dyno yesterday and hit 104 HP at the rear wheels
Im hoping to get a wide band o2 sensor to better tune it. What is involved in the upgrade? I'm using the MS version 2.2
Mike

[tbitz]

Wow. Been a year since this thread has surfaced.

Assuming you are talking about your 79SC. You must be running on three cylinders . Seriously though, something is wrong, or the dyno is waaay off calibration.

My 1978 SC dyno'd 187Hp at the rear wheels with a backdated exhaust.

A datalog of a WOT run would quickly show if fueling is reasonable even with a NB02. If you are running ultra lean/rich it would be obvious. A WB02 would be needed to dial in a proper AFR.

It maybe wise to check ignition timing also.

Cheers,

[CindyDuck]

Tony,
WOT I'm at 96Kpa, my VE in the 3k-5k range is in the high 80s to high 90s. Am I too lean? Where are you in this range? Im kind of paranoid about pouring too much fuel to it. Could be the dyno.
Mike

[tbitz]

Mark,

The only way to tell is with a datalog that shows the O2 voltage.

Find a nice long road and do a couple of WOT datalogs in 2nd or 3rd gear. Send me a datalog and I'll have a look to see if there is anything obviously wrong.

Cheers,

[CindyDuck]

Tony,
I e-mailed the DL.
Thank you for all your help.
Mike