brent clement

^ Ve rises quite a bit over 100%. Even on stock ports.

AllMotorRotor

Thank you NZ

I don't know where I got the other numbers from.

Im finishing up my CAI and Metal work around the radiator so this has been put on hold for a little bit.

I have done some more testing and logging though. Its just something to keep me occupied, so Im not bored. Costs pretty much nothing but time to fool around with it. Tuning cost some money and time though.

Don't worry, CAI includes the AFM

Aaron Cake

iTrader: (1)

Both turbo and non turbo act the same way. I was just using the turbo example because it was easier. If you do something in an NA to increase VE then a speed density system will need to be retuned the same as turbo.

AllMotorRotor

I understand what your talking about now.

I still need to log the voltage curve of the pressure sensor to see if that can be used.

This may not work they way I want, but I did finish my CAI and metal work so I started working on it again and I was able to set the voltage to about 2v at Pin2E and by removing about -43 at 800 rpm, I was able to get the engine to idle. I was also able to get the engine to be able to rev to about 3000rpm during LIGHT throttle by adding fuel. One instant problem I saw was that the amount of correction I had to use from 800(-43) - 2800rpm (+40). I can already see how this wont work but at the same time, there was no load correction with the SAFC since one of the TPS wires on the full range im using broke, so its always in HI map. It broke a month ago. O well.

Anyways, the only way I would be able to get this to work is if the pressure sensor would be able to be used in its place. I have a good doubt that it will be able to but I will see.

I also didn't have the temp sender hooked up.

AllMotorRotor

I was doing some research and a lot of people (not only rx7 owners) have bought MAP sensors and hooked up the SAFC to the MAP sensor instead of the TPS.

I also saw somewhere, I have to find it again, that someone said you can use a MAP sensor instead of the AFM and use a VPC (they abbriviated something) to convert the signal to the stock airflow reading. hmmm

AllMotorRotor

Ok so a VPC is a Vein Pressure converter. Made to replace a MAF with a MAP. Can't use that.

Aaron Cake

iTrader: (1)

I've done the MAP sensor and S-AFC combo before and it works well. Of course you still need the AFM. The MAP sensor just converts the S-AFC into a boost referenced controller instead of TPS referenced for better and safer tuning.

The VPC is actually what you probably want. Trying to use the TPS as a load sensor is not going to have good results.

AllMotorRotor

I understand that, which is why im going to see if I would have good results with the pressure sensor. Anyways, I don't think it will work out that great anyways since I have kept testing.

The VPC seems to only work with MAF, not AFM. I know you already know the difference.

Aaron Cake

iTrader: (1)

Check the instructions on the VPC. I'm 99% sure that it will work on the 2nd gen as I'm almost 100% certain that I've seen it before.

AllMotorRotor

Aight I'll check it out further and see if it will work.

AllMotorRotor

Well it seems you can use it but you need a pretuned rom chip which is only available for S4 and S5 Turbo Rx7s. Im sure the"tuning" is quite different from turbo compaired to non turbo.

AllMotorRotor

I think I have decided to go with megasquirt. Even using the pressure sensor, I still won't be able to add or remove the amount of fuel I would need to have injected with a SAFC. Although I am happy I was actually able to fool the ECU enough to get the engine to idle and rev to 3000rpm on light throttle.

MaczPayne

iTrader: (5)

You can't go wrong with the Megasquirt. With your skills, it should be a piece of cake to put together if you get the DIY kit.

AllMotorRotor

There is actually a guy on ebay selling assembled megasquirt kits. I have yet to check his feedback but it seems pretty good. $200 for an assembled kit. I wouldn't have the time patients to build it, I would want it in the car before it was done

AllMotorRotor

You would have never been able to figure out how to get the engine to run without the AFM

Read this entire thread again. You will see multiple time where I have said, "I can see this working and I can also see it not working".

You would also read where I said, "Its just something to keep me occupied, so Im not bored. Costs pretty much nothing but time to fool around with it".

I bet 98% of the members on this bored all thought you couldn't run the engine at all without the AFM because thats what they are told. Well I just busted that myth.

And NO im not going with a VPC, because thats more money then going with a megasquirt. Im still not done testing this. Infact I have something else to check. Its still with the pressure sensor but im going to test it, if it tests the way I hope, im going to use that in a way I have not explained.

Im an *** to you but no one else. I wouldn't talk about making yourself look like an ***. You have done that WAY more times then I have in MULTIPLE threads.

AllMotorRotor

Said what twice?

I don't try to spell good. I do it just to **** you off

AllMotorRotor

Not very good feedback, just going to build my own and build some custom circuits as well.

toplessFC3Sman

iTrader: (1)

i've dealt with the guys at diyautotune.com and have had no problems, and there is also a plug-and-play 2nd gen megasquirt, at least for the S4's last i read (altho that was months ago that i looked into that thread)

AllMotorRotor

Ya I think I got a glance at a sentence leading me to believe there was a PNP harness or something for the MS. I still have to do some more reading on MS. At first glance it seems confusing, mainly because the manuals for it are spread all over the place and is not in a easy to read catagorized PDF file.

toplessFC3Sman

iTrader: (1)

not quite a PDF, but required reading for MS users, and its all in one place:

http://www.msextra.com/manuals/MS_Ex...nual_Index.htm

AllMotorRotor

Thanks, I will take a look at that.