car stutterrrs at boost/high rpm afrs are 11.5-12 @ 5psi
so i started doing some more tuning and playing around with the lag settings in 2.1.0.
the car seams to pull great! and has loads of power but... somethings a miss as my afrs look good but the cars sounds like an N/a and has a short of what sounds like a miss fire or some type of stuttering i recorded the sound but i could not hold boost long enough i was hitting the speed limit i will try to post the sound file and the data log file are well. but can lag settings do this as it was not doing this before and i have been messing with many settings this week. also with the stock injectors is running 3.9ms injec @ 100 tps, 2.7ms injec@ 60% tps with accel enrichment ok? or is that to high? start smaller then this and as i increased it it seamed to help the stuttering but not enough to get rid of it. im scared shitless to kill my engine lol thanks for reading and your help.
an other thing i was wondering is what if its my timings thats are to close to the edge?? so in included my spark advance il get the rest of the msq out in the morning


Boy once im tuned there should be many answers answered for many ppl :P

 

well dont know Y that did not post my file.... hummm helps if i upload a zip file instead of a rar file

 

I will try to remember to look at this when I get home from work.

Ken

 

That's my timing table, which will be fine.

Is it stuttering only on throttle transitions or when you do a smooth pull to 5 PSI?

 

when i hold the throttle to the floor hitting high rpm at 5psi, like its detonating or missing fuel or timing im not sure i have some sound files but i can never get it to make the sound when im recording lol

 

Have you verified your base timing?

Ken

 

u mean sync the cas for the first time?

ok lat night i was driving and i hit the gas from a dead stop to woot. car seamed fine until around 6500-7000RPM ish. where it let off a big bang and a puff of gas came out the exhaust and my AFR hit 9.8 so im thinking its getting to rich so i dropped some fuel on my map and on my accell enrichment from 4 and kept on working my way down i think its down to 3ms with 100% tps. seams like the prob is gone but now the car seam under powered.

 

the other thing i noticed is under real time display the ms stays in warup mode ven when the car is fuly hot all after starts are set to 0 well below the temp the cars at and warm up enrichment are set to 0 as well.

i have included my msq, my data log file from last night theres no afrs hooked up as i cant get it to work in the ms

 

Yeah, did you set the timing on the MS to -5, and then adjust the CAS until the timing measured with a timing light was -5?

Ken

 

il re check that in the morning just to make sure

 

well morning came to quick sleept in lol il check that sat morning :P

 

Setting base timing would be very, very important.

The warmup enrichments will be at zero when the car has warmed.

The afterstart enrichment will rapidly drop to zero just after the engine has started.

 

ok so like 30 seconds to 1 min ish?

the base timing was set a longtime ago with the ms2 1.0.1 but il CHECK IT

 

STRANGE THING if i set the warmup enrichment at zero (witch i thaught it was to zero but was to 4) the car will not respond to tps at all it just dies!! odd.... other odd thing is i re sync the cas, set timing to fixed -5 then set rmp to 1k then inline the timing mark and took off, the car would run great below boost but any thing over boost would make the car act like it was at high rpm @ 5psi, so i started playing with timing. in boost just the next block of timing past 100kpa i needed to go from what i used to use 12-13 degrees to 23 degrees and i would lower the timing by 3-5 marks as i went up in boost that seamed to have helped LOADS and the car was drivable under boost but still dont sound wright! the afr still remained ok looking. so i just moved the car back to where it was "synced when Aaron cake tested it when we where running the ms2 @ 1.01" and i can use Aarons base timing map 12-10 degrees with no prob.. untill i hit that 3-5 psi range then then i hitt that narly sound. so my prob is timing related but odd that if i sync it its causing prob.... il try restabing the car just encase something went wrong at some point in time there....

 

When you updated to the later firmware, did you make the proper modifications to your lm1815 circuit?

Ken

 

That, and remember the PDF has an error and specifies a 0.1uF capacitor when you should use a 0.01uF capacitor to filter the CAS signal.

 

well.... we do have the good cap on there. as for the lm1815 ur talking about the ping 14 being grounded? yes we have dont that as well.

 

ok after talking to DJ55B we figured out Y the car is staying in warmup mode.. i was using a value of 0 in the filed for 75 C degrees witch made the car stay in warm up mode.
changed that to 100 and now the car was to rich to im going to fix that and see what happen now

 

well we whent out last night and tuned the car give her loads more timing in boost 20 ish and lower ans boost would go up car pull had and nice now. but now i have to work on the decell part and i think i just found a post that will help me.

 

heres the timing tables we adjusted let me know if its all wrong guys. the car seams to pull much better now it dose not feel like its being held back as much.wast gate is no longer able to keep the stock boot so its creeping up to 12 psi if i keep my foot on it so that must mean improvement.
i forgot to say that we set base timing as well.

 

http://forum.teamfc3s.org/showthread.php?t=41915

interesting timing read

 

martin ... those don't look like timing maps to me

 

odd, i did not look at them but il repost them and just keep there names as they are

 

i just re-opened them in MS and it shows up fine ... apperently looking at it in Notepad it adds a 0 at the end which I assume would take up a decimal place

 

If you are having to run 20 degrees in boost to make the car run properly (at what boost level?) are you sure your CAS is positioned correctly?