Anyone wanna give my fuel and spark tables a look over?
#1
Elite Member
Thread Starter
iTrader: (11)
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,065
Total Cats: 1
Anyone wanna give my fuel and spark tables a look over?
Its kinda late I guess since I've been driving the car for over a year as is, but how do they look? I'm really not sure how to interpret the tables, so obviously nothing jumps out at me. I just wanted to see if anyone had any input on wether things looked good, bad, okay and if I should change anything. Sorry for the noobish question...I'm finally trying to make sense of it all slowly but surely
CspenceFuelTable.jpg?t=1269900661
CspenceSparkTable.jpg?t=1269900695
CspenceFuelTable.jpg?t=1269900661
CspenceSparkTable.jpg?t=1269900695
#7
Elite Member
Thread Starter
iTrader: (11)
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,065
Total Cats: 1
Seems like everyone is pulling more spark than I....Mine's probably so conservative since I'm running 18psi. I'm starting to wonder if I'd be better off running 12-15psi and be more agressive with my timing. Hows the fuel look?
#8
Don't think of timing as 'conservative' as a blanket statement. You can still keep your boost level high and increase the timing in the lower cells to give yourself a bigger midrange. If you find that you can hit your desired power level at lower boost, even better .
#9
Tour de Franzia
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
did you make this on a dyno? If you're running X* at 4500rpm then you can most likely run x+3 at higher RPM, but the advance is really dependant upon MBT. I think the general values you have are a good starting point, but you could use more 100+ kpa cells and less vacuum cells in the grand scheme of things. I run low comp and run similar values, just a touch higher, roughly 5* retarded from MBT due to my car's life on a racetrack.
#12
Elite Member
Thread Starter
iTrader: (11)
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,065
Total Cats: 1
did you make this on a dyno? If you're running X* at 4500rpm then you can most likely run x+3 at higher RPM, but the advance is really dependant upon MBT. I think the general values you have are a good starting point, but you could use more 100+ kpa cells and less vacuum cells in the grand scheme of things. I run low comp and run similar values, just a touch higher, roughly 5* retarded from MBT due to my car's life on a racetrack.
I really do wanna get on a dyno...but I just want to have someone really proficient with MS to "fine" tune it. I'll tell ya, it'll be nice to meet up with everyone so I can see how other setups run compared to mine. Its hard to understand how well or bad a car is running when there's nothing to compare it to. I mean, I could be "missing out" on some hidden power or I could be pretty much where I should be....Thats how I feel at least
#13
Elite Member
Thread Starter
iTrader: (11)
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,065
Total Cats: 1
So would this proposed table be a little better in theory? All I did was bump up my idle cells and then changed the kpa scale so I utilized the whole table...Looking at it now, it looks like I could almost change my rpm scale so I have more resolution in a usable rpm, not 500 or 8000 rpm. If I did that I could get rid of the jump from 1600 rpm to 3000 rpm and also probably get more resolution between 3000 and 6000 rpm.
CURRENT:
CspenceSparkTable.jpg?t=1269900695
PROPOSED:
CspencePropsedSparkTable.jpg?t=1269916847
CURRENT:
CspenceSparkTable.jpg?t=1269900695
PROPOSED:
CspencePropsedSparkTable.jpg?t=1269916847
Last edited by Cspence; 03-29-2010 at 11:03 PM.
#14
Elite Member
Thread Starter
iTrader: (11)
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,065
Total Cats: 1
God, I knew it was only a matter of time till all these noob questions came out of me. Looking at my VE table, how does MS know what to supply for fuel at idle if the rpm scale on the table starts at 1000rpm (and I'm idling at 800). I presume it just estimates those values, but it'd probably be benificial to have control over them, no?
#18
Chris my friend used to work at a BMW and VW performance shop in startford, and he's boss is still cool with him so he gets killer deals on using the shop... In 2-3 weeks I'm gonna hit the dyno for really cheap like $50-100 for 2-3 hours... I'll ask him and see if we can rent it the whole day for cheap and tune both our cars perfectly... For vacumm, cruise and boosted cells. Are you down with OPP?
#19
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,729
Total Cats: 4,126
Why are you giving yourself so many cruise rows on your ignition table? You pretty much have the same timing for your 100-90-80 rows, so why not combine them and give yourself better control at various boost levels...
#20
Tour de Franzia
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
No, this was the tune that was loaded on my car when I bought it. I know I'll probably catch some ****, but what is MBT? You definitly have a good point about having more 100+kpa cells, I'm not really sure why the table was set up like that. You would think that you would want the most control over the settings where it counts....
I really do wanna get on a dyno...but I just want to have someone really proficient with MS to "fine" tune it. I'll tell ya, it'll be nice to meet up with everyone so I can see how other setups run compared to mine. Its hard to understand how well or bad a car is running when there's nothing to compare it to. I mean, I could be "missing out" on some hidden power or I could be pretty much where I should be....Thats how I feel at least
I really do wanna get on a dyno...but I just want to have someone really proficient with MS to "fine" tune it. I'll tell ya, it'll be nice to meet up with everyone so I can see how other setups run compared to mine. Its hard to understand how well or bad a car is running when there's nothing to compare it to. I mean, I could be "missing out" on some hidden power or I could be pretty much where I should be....Thats how I feel at least
Dyno tuning is not difficult. Go to the dyno with a fuel table that hits your AFR targets perfectly, then put load on the dyno in for each rpm column, and then focus on one load cell, then increase spark in that load cell and look at the dyno monitor to see if output in creases. Do this until you get no more increase or detonation, then back off from MBT a safe value. I'd move back 2* for a street car or 4*+ for a track car.
Use the Polski det cans and you will win at lyphe.