The MegaSquirt II 5.0 build thread

[RNSF]

Leave the calibrate button and LED on, you will need to free air cal it quite often to maintain accuracy.

It is speed density, it will never run in closed loop unless I change something. Once the tune is done it will run in open loop with LOADvsRPM and the AFR table will be disabled. The LC-1 will become a gauge, recalibration will more than likely be done only if I need to make tuning adjustments.

[OrangeCrush 86]

E303 cam, 1.6rrs .498" total lift

That is where is was when I calibrated it (22.1). I left the LED and switch hooked up to the calibration circuit because the instructions didnt say to remove it, should the LED and switch not be there anymore?

AFR shows 14.5-15.0 in park and 13.5-14.0 loaded in gear. I still need to work on tip-in, it might pop sometimes when hot while revving and has a little lag in the tune when I tap it. I am assuming I just dont have the accel squirt big enough yet.

Timing rests at 22-24 at idle and quickly ramps to 36 at 2500 and holds there till 6000.

Leave the calibrate button and LED on, you will need to free air cal it quite often to maintain accuracy.

[RNSF]

Have you calibrated your wideband?

I usually only see about 20.9:1 after the sensor warms up...

I think you might have a similar issue that I had. When you rev the car the RPMs drop really fast. As soon as you add some load it might cause the car to buck. My engine revs lightning fast and trust me, it wasn't fun trying to drive when the RPMs would fall super fast upon gear shifts. If I recall we had to change some of the decel tables to fix that. Sounds like it idles pretty smooth so far, but I think you only have a stock cam so it should be pretty smooth to begin with.

I would also shoot for around 14.7-15.0:1 for idle AFR in park. Might want to be rich like you are when it is in gear and has a little load on it.

What are you doing as far as timing goes?

E303 cam, 1.6rrs .498" total lift

That is where is was when I calibrated it (22.1). I left the LED and switch hooked up to the calibration circuit because the instructions didnt say to remove it, should the LED and switch not be there anymore?

AFR shows 14.5-15.0 in park and 13.5-14.0 loaded in gear. I still need to work on tip-in, it might pop sometimes when hot while revving and has a little lag in the tune when I tap it. I am assuming I just dont have the accel squirt big enough yet.

Timing rests at 22-24 at idle and quickly ramps to 36 at 2500 and holds there till 6000.

[Macs Stang]

I forgot to throw up my modified adapter. One leg was added for the LC-1 gauge and the other was for the LC-1 controller itself.



I made a short idle and rev video last night.

http://www.youtube.com/watch?v=VXqUPA8fxrw

Have you calibrated your wideband?

I usually only see about 20.9:1 after the sensor warms up...

I think you might have a similar issue that I had. When you rev the car the RPMs drop really fast. As soon as you add some load it might cause the car to buck. My engine revs lightning fast and trust me, it wasn't fun trying to drive when the RPMs would fall super fast upon gear shifts. If I recall we had to change some of the decel tables to fix that. Sounds like it idles pretty smooth so far, but I think you only have a stock cam so it should be pretty smooth to begin with.

I would also shoot for around 14.7-15.0:1 for idle AFR in park. Might want to be rich like you are when it is in gear and has a little load on it.

What are you doing as far as timing goes?

[Macs Stang]

I totally agree. However, I would never expect a stock computer to run such injectors. In fact if I had gone any bigger than the 42#ers I installed, I probably would have looked for a older FAST stand alone. RPMs is another tough one for stock computers if you are building a high reving motor. I am surprised how good the stock ECU actually is though. The old A9L from the 80s does sequential injection, where MS can't lol.

I agree, I was trying to make things work with what I had. I knew that I needed a stand alone setup, I just had a tough time swallowing the cost of it. It finally took a few years of people pounding it into my head with how much money I have sunk into the long block that I should have something worth more then $100 controlling it...

So far so good with the AEM, I have been learning a lot through trial and error and especially asking others for help. I am never afraid to ask, especially when I don't know. Kenny has been a huge help with explaining things or offereing to tweak my tune here and there to try and make it run better.

[Max Power]

If thats the case I will need two Dominators.

I will dominate you. let me find someone else who will also dominate you.

Domination, FTW!

[RNSF]

I forgot to throw up my modified adapter. One leg was added for the LC-1 gauge and the other was for the LC-1 controller itself.



I made a short idle and rev video last night.

http://www.youtube.com/watch?v=VXqUPA8fxrw

[Notch]

I think you would get better mileage/performance with a FAST XFI setup.

I am going to run 2 cylinders on a FAST XFI mileage tune, and the other 2 cylinders on a BS3 performance tune.

[OrangeCrush 86]

If thats the case I will need two Dominators.

I think you would get better mileage/performance with a FAST XFI setup.

[Notch]

They came with 1 barrel carbs dummy.

If thats the case I will need two Dominators.

[Max Power]

I'm going to start a thread with pictures of me re jetting a stock 2 bbl carb on an old 200 I6 for better performance.

Within 2 pages TCS will have me ordering a new Pro Systems Dominator for it.

They came with 1 barrel carbs dummy.

[Turbohwagon]

I'm going to start a thread with pictures of me re jetting a stock 2 bbl carb on an old 200 I6 for better performance.

Within 2 pages TCS will have me ordering a new Pro Systems Dominator for it.

I'll sell you a pro-jection setup.

[Notch]

I'm going to start a thread with pictures of me re jetting a stock 2 bbl carb on an old 200 I6 for better performance.

Within 2 pages TCS will have me ordering a new Pro Systems Dominator for it.

[RNSF]

I totally agree. However, I would never expect a stock computer to run such injectors. In fact if I had gone any bigger than the 42#ers I installed, I probably would have looked for a older FAST stand alone. RPMs is another tough one for stock computers if you are building a high reving motor. I am surprised how good the stock ECU actually is though. The old A9L from the 80s does sequential injection, where MS can't lol.

The MS3 is sequential, I just wasn't willing to spend and extra $200 for it, bank fire is plenty sufficient.

[OrangeCrush 86]

Not to mention a stand alone is lightning years faster then the old 15 mhz computers...

I had been using a factory ECU up until about a month ago and we were having a bunch of issues trying to control the 160# injectors (AEM driver for those). We just could not get enough fuel commanded in the diablo tune. Not to mention I am not running speed density and tossed the MAF in favor of a MAP sensor.

I totally agree. However, I would never expect a stock computer to run such injectors. In fact if I had gone any bigger than the 42#ers I installed, I probably would have looked for a older FAST stand alone. RPMs is another tough one for stock computers if you are building a high reving motor. I am surprised how good the stock ECU actually is though. The old A9L from the 80s does sequential injection, where MS can't lol.