VE table values too high

[Barton]

Hello, this is the first time I notice this, the values on the VE table are too high, near to 200 and the duty cycle is low about 30%, a little help will be apreaciated.

Right now the forum reached the attachment quota, Is somebody is willing to help, I can send the msq and log file to an email.



thanks

[kjones6039]

Hello, this is the first time I notice this, the values on the VE table are too high, near to 200 and the duty cycle is low about 30%, a little help will be apreaciated.

A little scant on information about your setup! What is this beast?

Ken

[Barton]

4g63 turbo, gsc s3, precision 7175, injector dynamics 2200cc ms3x, the car stars perfectly runs perfectly but some how I need to push the ve table to 200 at only 120kpa, pre 1.4 beta 2

I have only tuned below 6k rpm and 207kpa because other problems but tomorrow I'm going to finish it but I do not know whats happends.

here are the msq and one log:

https://drive.google.com/file/d/0B7OFUy ... sp=sharing


thanks

[Matt Cramer]

My first thought was the Multiply MAP setting, but that's turned on.What's your fuel pressure doing under boost? Is it climbing as much as it should?

Other notes - a 50% decel fuel amount is usually way too aggressive. We usually use 100% on manual transmissions and 90% on automatics.

Please note that not everyone is going to know what to do with a RAR file; using an unusual compression setup may limit who is going to respond.

[billr]

"Please note that not everyone is going to know what to do with a RAR file; using an unusual compression setup may limit who is going to respond."

Yep, that's certainly true for me. If it isn't posted in the easy-to-open native MSQ, MSL, or CSV formats, I don't bother trying to open.

[nathaninwa]

I haven't looked at the msq, but are you possibly running e85 and reqfuel is calculated for gasoline?

[kjones6039]

"Please note that not everyone is going to know what to do with a RAR file; using an unusual compression setup may limit who is going to respond."

Not to mention, we old farts just hate learning new tricks.........

Ken

[ashford]

the 2 required fuel numbers don't match. change # squirts till they do, this is what is needed for duty cycle to be reported right when sequential.

also your required fuel is way off if you run e85

[Barton]

My first thought was the Multiply MAP setting, but that's turned on.

yes, that was the first thing I checked.

What's your fuel pressure doing under boost? Is it climbing as much as it should?

My base pressure i43psi, and it behaves as it should (1:1 with boost)

Other notes - a 50% decel fuel amount is usually way too aggressive. We usually use 100% on manual transmissions and 90% on automatics.

ok, but with that value the afr behave perfectly when I lift the throtle, is there something else than the afr that I should think of?

I haven't looked at the msq, but are you possibly running e85 and reqfuel is calculated for gasoline?

I'm using 95 octane gasoline for now to check everything is right with 16psi spring, I'll be using c16 later.

the 2 required fuel numbers don't match. change # squirts till they do, this is what is needed for duty cycle to be reported right when sequential.

also your required fuel is way off if you run e85

the correct Squirts per engine cycle for a sequential 4cyl is 2??

[billr]

"the correct Squirts per engine cycle for a sequential 4cyl is 2??"

Well, I can answer that one, even without seeing your MSQ. Setting "full sequential" for injectors produces one squirt per engine cycle, regardless of what number you put in there.

[Barton]

"the correct Squirts per engine cycle for a sequential 4cyl is 2??"

Well, I can answer that one, even without seeing your MSQ. Setting "full sequential" for injectors produces one squirt per engine cycle, regardless of what number you put in there.

I assume that one squirt was one injector event, so in 720º of the engine cycle occurs 4 injector events (one per injector), when I read your reply I thought I was wrong but I just tried 1 squirt and the TS shows an error, "cannot alternate 4cyl with 1 squirt" why is that?

thank you,

[ashford]

"the correct Squirts per engine cycle for a sequential 4cyl is 2??"

Well, I can answer that one, even without seeing your MSQ. Setting "full sequential" for injectors produces one squirt per engine cycle, regardless of what number you put in there.

I assume that one squirt was one injector event, so in 720º of the engine cycle occurs 4 injector events (one per injector), when I read your reply I thought I was wrong but I just tried 1 squirt and the TS shows an error, "cannot alternate 4cyl with 1 squirt" why is that?

thank you,

you could put 2 alternating or 1 simultaneous, it dont really matter when sequential is enabled just so that required fuel=ms box below it

incorporating afr will reduce ve above 14.7 as well

[Barton]

"the correct Squirts per engine cycle for a sequential 4cyl is 2??"

Well, I can answer that one, even without seeing your MSQ. Setting "full sequential" for injectors produces one squirt per engine cycle, regardless of what number you put in there.

you could put 2 alternating or 1 simultaneous, it dont really matter when sequential is enabled just so that required fuel=ms box below it

incorporating afr will reduce ve above 14.7 as well

ok, if I select sequential injection, the ms will always inject sequentially right does matter any other option in engine an sequential settings?

the squirts per engine cycle and the injector staging will only affect my req fuel and duty cycle, did I get that right?

[ashford]

ok, if I select sequential injection, the ms will always inject sequentially right does matter any other option in engine an sequential settings?

the squirts per engine cycle and the injector staging will only affect my req fuel and duty cycle, did I get that right?

squirts per cycle affect nothing running wise when sequential is selected but i remember in the past it affected reported duty cycle, this may or may not have been fixed.
for reference
at 6000rpm 20ms injector time(total for 720*)= 100%dc

[dontz125]

The settings are weird with sequential; they're both ignored and used, depending on the function in question. Save yourself the hassle and confusion - if you're running full sequential, select 1 squirt simultaneous.

[Barton]

Ok, Im using 1 squirt simultaneos, injector dynamics 2200cc, 95 oct gasoline at 20psi and I'm getting 48% (precision 7175)of duty cycle and is this duty right?, I while ago I tuned almost the same engine and got 54% at 26psi (precision 6765) with a set of fic 2150cc injectors and a lot more power. what is wrong?


thanks

[slow_hemi6]

I would not say that anything is necessarily wrong and 50% DC is not even working them hard. One set of injectors is not going to be the same as the other. Fuel quality, flow and pressure won't be identical on the 2 cars. External conditions there could be a lot of reasons why this set of injectors need a bit more DC. Such big injectors might not be dead on linear all through their range of DC either.