First OFFICIAL TWINCHARGED M20 BUILD

[Denny]

Damn you!

LOL..Trust me I'm all :firehop: up! Car is all ready to get street tuned ...spent all day just looking at her saying damn insurance 1000000 times in my head!!

[Denny]

**Update**

Well did some part throttle tuning and thats going well... so well that I decided to get in boost a bit to start tuning the exciting part. Not so great I got this weird reaction... anybody know what this could be.??? Injectors turning off? maybe..



and it even happened after in a no boost situation..



f*cking weird... need some expert help :) one pattern I did find with these 2 graphs is that it happens at round 3400rpm++

Could this be the cause? required fuel setting

[kamotors]

does it not rev past 4045rpms?(both logs seem to stop there)

[Denny]

does it not rev past 4045rpms?(both logs seem to stop there)

I didnt push the engine above 4000RPM and nothing more then 1/4 throttle on the pedal since it breaking down like that everytime I try going higher then 3500...

Just came back from another run... and I cant rev any higher on any gear.... :(

[kamotors]

try to reposition the CPS really close because the AFR doesnt seem to be soo terrible that it wont rev past that point

[Denny]

try to reposition the CPS really close because the AFR doesnt seem to be soo terrible that it wont rev past that point

I checked my new log I just made and the AFR are good nothing in the 9's to make it bog or anything it really is looking like something mechanical like the CPS. I logged a session of the toothed wheel in action (under ignition log viewer) but dont understand how its read..

[FLG]

Check the cps air gap. And if aftermarket cps get rid of it... Had nothing but issues. Finally check it with an ohm meter. Should be 540ish give or take between two of the terminals (forgot which ones but one you'll get nothing)

Sent from my Galaxy Nexus using Tapatalk 2

[Denny]

try to reposition the CPS really close because the AFR doesnt seem to be soo terrible that it wont rev past that point

Check the cps air gap. And if aftermarket cps get rid of it... Had nothing but issues. Finally check it with an ohm meter. Should be 540ish give or take between two of the terminals (forgot which ones but one you'll get nothing)

Sent from my Galaxy Nexus using Tapatalk 2

Guys what should the gap space be?

[LJ851]

Guys what should the gap space be?

1 mm is typical..

[E30stan]

why the small pics

[Denny]

1 mm is typical..

It looks pretty tight right now! should it be more like paper thin..like barely touching the wheel?

why the small pics

why because I suck at HTML :(

[akorcovelos]

Not sure if its the same with MS2, but I was having the same issue with my MS3x and Chris gave me the solution. Start at post #36 http://www.e30tech.com/forum/showthr...=100756&page=4

[Denny]

Not sure if its the same with MS2, but I was having the same issue with my MS3x and Chris gave me the solution. Start at post #36 http://www.e30tech.com/forum/showthr...=100756&page=4

thank you checking this out right now..

[Denny]

Not sure if its the same with MS2, but I was having the same issue with my MS3x and Chris gave me the solution. Start at post #36 http://www.e30tech.com/forum/showthr...=100756&page=4

You just made me realise that what if I didnt do the CPS section on my MS2 correctly! This is my first test drive with the MS2 box I built. So right now I'm going to:

1. Tighten the gab on the CPS
2. check to see if CPS sensor is good
3. Check my MS2 connections for the CPS

Going to work on it tomorrow...got to get this fixed really need to street tune before my reserved Dyno day on may 8th...

[LJ851]

Denny, when i put a miller maf on my m20 on the dyno it wouldn't rev past 5k ish. Worked great with the stock chip. Ended up being an aftermarket CPS that i didn't know was on there. New OEM CPS and no more problems.