Update on my MPI Tuner!

[igdrasil]

But on the bright side a lower fuel cal will help you to stay under the fictional "fuel cut", since your output voltage will be slightly lower (for the same map setting values).

Is that so? ...I had this vague idea this could happen if I had the FZC too high.
Yesterday trying to tune 7psi (5psi is done) from the 5psi map I felt what I think, a damn fuel cut when reaching 7psi @ WOT. I said, s*** DID I blew the engine again???? So I dont know... Im tunning with extra injectors and sending enough fuel that both the Greddy a MPI are off charts on A/F readings.

Im sure it wasnt enough fuel to make a BIG DAMN missfire, I know the difference.

It was some kind of fuel cut. Looks like the ECU somehow knew im sending lots of fuel...shes an example of A.I. (crazy) (blah) WE should kill em' all.

I been having this issue since the install, and some stumble when cruising @ 3krpms aprox.

I will be retuning this thing in the upcomming days.

 

[LinuxRacr]

Jeremy,

You forget that I mn not running the extra injectors, so there is a little experimenting going on before I add them.

 

[LinuxRacr]

Is that so? ...I had this vague idea this could happen if I had the FZC too high.
Yesterday trying to tune 7psi (5psi is done) from the 5psi map I felt what I think, a damn fuel cut when reaching 7psi @ WOT. I said, s*** DID I blew the engine again???? So I dont know... Im tunning with extra injectors and sending enough fuel that both the Greddy a MPI are off charts on A/F readings.

Im sure it wasnt enough fuel to make a BIG DAMN missfire, I know the difference.

It was some kind of fuel cut. Looks like the ECU somehow knew im sending lots of fuel...shes an example of A.I. (crazy) (blah) WE should kill em' all.

I been having this issue since the install, and some stumble when cruising @ 3krpms aprox.

I will be retuning this thing in the upcomming days.

Ig,

All it takes is low 11's to cause a misfire at certain RPM's. If you are off the charts, then you are definitely in the 10's and below. If there is enough raw fuel left over from the last combustion cycle, then you start getting pre-ignition. I'm telling you, that damn J&S is the s***! I see all that happening. Please don't beat my record for most engines.

 

[acidbug]

Ig,

All it takes is low 11's to cause a misfire at certain RPM's. If you are off the charts, then you are definitely in the 10's and below. If there is enough raw fuel left over from the last combustion cycle, then you start getting pre-ignition. I'm telling you, that damn J&S is the s***! I see all that happening. Please don't beat my record for most engines.

Yeap..overly rich conditions are not good for boost. Especially in the 10's a/f wise. this will cuase you to bog down just as you hit boost. and this will also cause increase turbo lag. I know..b/c when i was first running rich...the car would bog...and than boost would hit..but felt like the hesitation that thoses msp are having.

Than i got a blinkin cel...never got a chance to pull it..but i bet it was a random miss fire!

 

[acidbug]

Is that so? ...I had this vague idea this could happen if I had the FZC too high.
Yesterday trying to tune 7psi (5psi is done) from the 5psi map I felt what I think, a damn fuel cut when reaching 7psi @ WOT. I said, s*** DID I blew the engine again???? So I dont know... Im tunning with extra injectors and sending enough fuel that both the Greddy a MPI are off charts on A/F readings.

Im sure it wasnt enough fuel to make a BIG DAMN missfire, I know the difference.

It was some kind of fuel cut. Looks like the ECU somehow knew im sending lots of fuel...shes an example of A.I. (crazy) (blah) WE should kill em' all.

I been having this issue since the install, and some stumble when cruising @ 3krpms aprox.

I will be retuning this thing in the upcomming days.

Best way to tell if you are hitting the fuel cut..is data log your runs...if you take a look at analgo out..that's what the MAF's reading..If you are hitting over 5.0 you will hit fuel cut.

But the way i am setup...i really never see over 4.5volts!

Chas

 

[LinuxRacr]

Pre-ignition is just as bad as detonation, so be careful!! (eek2)

 

[acidbug]

bhahaI go away for an hour and miss like 12 posts lol... Right now I think my max timing retard is -13 or so. -8 in the 8x16 and -4 or -5 in the top 1x16.

Yeah I guess it is just the turbo lag- but it's never been this bad before. Makes sense that I'll need to adjust the fuel map numbers a bit since your turbo spools quicker. But which values? I'm still a little confused at the backwardsness of the analog map but love the way it feels.... So for a guy who spools up a little later than you do- around .70- which fuel vaues should I change and what to?

Thanks@!!!

Well your timing seems to be just about right...As long as you don't hear detonation.

Yeah..u just need to do little tuning..in that area...Not sure how to fix your problem..But my suggestion is once you get your laptop..to have someone in your car with you..and practice launching & tuning at the same time..Most of my tuning..is trial & error..My girl gets so pissed at me..b/c when we go tuning..i pull over like every couple of minutes...

So basically have the person change your 8X16 fuel map from those 6's to like 7's...and see if it helps..if not..than maybe (but i doubt it) you may need 5's instead of 6's.

When i left 5's in there..the car felt very lagy..and had issues with drivablity.
Such as bucking..and surging..

Chas

 

[igdrasil]

Chaz:

I have one question. How can you send more fuel when you are actually pulling it away on the 1X16 map on the analog view. I mean. Your is like:

1.00
1.00
1.00
.75
.85
.35
.20
.20
.20
and so on...

If I do this in my MPI, car will run LEAN!, If I keep them all in 1.00 it will run OK.
for example, I tried the idle in .20, instead of 1.00, and the car almost died on me and in order to have a normal idle, I had to input a 25 instead of a 9 or 8 (FZC=0) in the current position of the 8X16 map. Then the Analog mod would say ~6.

Whats wrong here.?

 

[acidbug]

Chaz:

I have one question. How can you send more fuel when you are actually pulling it away on the 1X16 map on the analog view. I mean. Your is like:

1.00
1.00
1.00
.75
.85
.35
.20
.20
.20
and so on...

If I do this in my MPI, car will run LEAN!, If I keep them all in 1.00 it will run OK.
for example, I tried the idle in .20, instead of 1.00, and the car almost died on me and in order to have a normal idle, I had to input a 25 instead of a 9 or 8 (FZC=0) in the current position of the 8X16 map. Then the Analog mod would say ~6.

Whats wrong here.?

The reason why it died at idle... was when you put in the.25 in the 1x16 column..it cuased the car to run lean..

Now do you have the new turbo module? if not..don't bother with my maps..b/c they will cuase you to run very very very very very very very lean!

lol

Chas

 

[acidbug]

The best way to explain why my maps looks backwards is this.

The old turbo module added a good amount of fuel..especially when you have extra injectors running. Which is why people like big timm.and such..Are having no issue's with leaning out.

With the new turbo module..it add **** LOADS (sorry for curing but wanted to relay the magnitude of fuel being added). So my problem is every time i drop the analog fuel cal bye 1..i have to add ~1 to my 8X16 fuel map in the non boosted areas(Idle column..and suck)!

Well it took me 4 points off the Analog fuel cal before i finally got my a/f ratios into the 12'-13's. Which is why my idle column & such has such larger numbers..and my boost areas have such low numbers..

I really need to drop it another point inthe anal fuel cal..but my numbers are just right..and i don't feel like re-doing them.

Car feels great..it was so hot today..and the car still pulled. Only problem is 1st & 2nd gear..the car's torque steer is serious!!!

Chas

 

[igdrasil]

With the new turbo module..it add **** LOADS

THAT EXPLAINS! Well...thats why Im activating the aditional injectors. Nick told me about the new turbo module...so, this is the 3rd release of the TM.

My extra injectors are running great! So...Im not in need of the TM3

I really need to drop it another point inthe anal fuel cal..but my numbers are just right..and i don't feel like re-doing them.
Chas

Drop what into WHAT??? (boom01)

 

[Kooldino]

Ig,

All it takes is low 11's to cause a misfire at certain RPM's. If you are off the charts, then you are definitely in the 10's and below. If there is enough raw fuel left over from the last combustion cycle, then you start getting pre-ignition.

If you are running richer than a 10:1 AFR, wouldn't that be NO ignition? Pre ignition would come from having too much timing lead or too low of an octane, ie, too much cylinder heat/pressure, no?

 

[Kooldino]

THAT EXPLAINS! Well...thats why Im activating the aditional injectors. Nick told me about the new turbo module...so, this is the 3rd release of the TM.

My extra injectors are running great! So...Im not in need of the TM3


Drop what into WHAT??? (boom01)

Hey now!

 

[LinuxRacr]

If you are running richer than a 10:1 AFR, wouldn't that be NO ignition? Pre ignition would come from having too much timing lead or too low of an octane, ie, too much cylinder heat/pressure, no?

Ask Nick? When I was too rich, and have lots of timing pulled, the J&S lit up after a few seconds....Research time for Linux.

 

[smp3000]

Any new updates? New maps? hehe I'm STILLLL waiting on my laptop to arrive. Can you beleive it? It took two days to get from NC to AZ via fedex but now they can't find my house- so it's been in Phoenix since last Friday!

 

[505zoom]

Wow, that sucks about your laptop man.

My maps won't help you any, but I did finally fix my s*** so I can save maps now. I was getting a runtime error any time that I tried to save a map, and the software would close down. All good now, this is the current map I am running:

http://www.msprotege.com/members/505zoom/rich.SMT

I don't know about you guys that are running 0-1 fuel cal, I am still running the same 7 that I started out with. (scratch)

 

[smp3000]

As of now I'm still running Chas's old map (2 maps ago but still backwards) and I know exactly what I need to change, but the fuel map works VERY well for my car. I need to pull some more timing up top and advance some down low.

My fuel cal is at 2

 

[acidbug]

Yeap..did some more tuning..It was really really hot..like in the high 90's and 99% humidity..the car was pulling fuel..and detonating..i pulled like addition -3 timing..in my ignition map..

And added some fuel in th 1X16 map..

Will have it up soon..just need more time to tune!

Chas

 

[smp3000]

how much fuel did you add in the 1X16? Also aren't you now at 0 fuel Cal?

 

[LinuxRacr]

I'm fixing to do like Little Beavis, and put in the extra injectors. Takes him an hour tops to tune. He tunes up to 0 PSI with the Analog Map, and then uses the Extra Injector Map to tune the extra injectors from 1 PSI up. He still is using the FM voltage clamp like me.