NCRmtrsprts510 Posted August 23, 2010 Report Share Posted August 23, 2010 If anyone is good at tuning please help me.. i have no freaking idea what is going on. Quote Link to comment
DISLEXICDIME Posted August 23, 2010 Report Share Posted August 23, 2010 those pics suck . what = rpm ? on the graph Quote Link to comment
NCRmtrsprts510 Posted August 23, 2010 Author Report Share Posted August 23, 2010 tomorrow i am going to do a 2nd gear pull from1500rpm to redline and record that, but a couple of these pictures are pulls and that a/f ratio is on crack....... Quote Link to comment
thisismatt Posted August 23, 2010 Report Share Posted August 23, 2010 With the graph windows in focus, hold Alt and press Print Screen, then paste into an image editing program, then save and upload. It's especially easy with photoshop because it will automatically give you a canvas of the correct dimensions. Then you'll get nice, perfect screen shots like this. Quote Link to comment
RoadRace Posted August 23, 2010 Report Share Posted August 23, 2010 Do you need software help, graph reading help or do you need to know what your AF is supposed to be? from what i see, i can't tell you anything because there are no titles on the X-Y axis, so i don't know what is being graphed - and if there is, i can't see them. As a rule, the highest amount of load on your motor will be full throttle in top gear, so if you're tuning for max load/max power, then do it in top gear and you'll be safe in all other gears. were you shifting on those graphs? Quote Link to comment
NCRmtrsprts510 Posted August 23, 2010 Author Report Share Posted August 23, 2010 the x-y graph is time and air/fuel, the most basic graphing it has. i need all the help i can get with tuning..... i dont know why its spiking like crazy Quote Link to comment
NCRmtrsprts510 Posted August 25, 2010 Author Report Share Posted August 25, 2010 Here are some better pulls, i moved one of the grounds that was on the wideband, and i extended the maf over a foot away from the turbo, and here are the results. x = time (about a second per 1000rpms) y = AFR the larger spikes are me hitting the throttle and releasing the throttle. pull from 1500-7000rpm 2nd gear. 1500-7000rpm 2nd gear. 1500-6500rpms idle for about 3 seconds. do have a idle problem it willl be at about 850 and then every like 2 seconds will be like a misfire but on the wideband it will show up as a lean spike.. :confused: :confused: Quote Link to comment
RoadRace Posted August 25, 2010 Report Share Posted August 25, 2010 i see where you're coming from. the overall AFR looks to be acceptable - its safe, at 10.7ish (?) at full load WOT. that will lean out in high gear. the spiking - as you mentioned, can be attributable to electical connections, but it can also be fuel related - what's the fuel pressure during all this? I used to run a duty-cycle monitor on the injectors, it was avalable from Haltech - i don't know if they are still avaialble or not, but its really handy as a reference to see if your injectors are getting maxed out, which also creates problems - kinda like when your hard drive on your computer only has 10mb left on it and nothing seems to run right until you free up some memory - same thing with injectors,at least in my experience. Quote Link to comment
Braden Posted August 25, 2010 Report Share Posted August 25, 2010 fuck i wish i had a computer to tune all my shit!!!! lucky guy!!!! hell all us carb guys have is a flathead and an ear! Quote Link to comment
RoadRace Posted August 25, 2010 Report Share Posted August 25, 2010 fuck i wish i had a computer to tune all my shit!!!! lucky guy!!!! hell all us carb guys have is a flathead and an ear! honestly, i'd rather just look at the spark plugs. Quote Link to comment
NCRmtrsprts510 Posted August 25, 2010 Author Report Share Posted August 25, 2010 i see where you're coming from. the overall AFR looks to be acceptable - its safe, at 10.7ish (?) at full load WOT. that will lean out in high gear. the spiking - as you mentioned, can be attributable to electical connections, but it can also be fuel related - what's the fuel pressure during all this? I used to run a duty-cycle monitor on the injectors, it was avalable from Haltech - i don't know if they are still avaialble or not, but its really handy as a reference to see if your injectors are getting maxed out, which also creates problems - kinda like when your hard drive on your computer only has 10mb left on it and nothing seems to run right until you free up some memory - same thing with injectors,at least in my experience. btw i did have the SAFC at a +15% correction at 1000rpms and a decrease of 1% at every 1k until 4000rpm which then i decreased 2% every 1k. Fuel pressure is at 30psi at idle. i just think my correction is up too high, but my pos manifold the wastegate flange cracked, so now i gotta take my shit apart and weld it back together... :angry: fuck i wish i had a computer to tune all my shit!!!! lucky guy!!!! hell all us carb guys have is a flathead and an ear! dude with the program im running, it works on carb motors... just drill a 1" hole into your exhaust, weld in the sensor bung, put the sensor in, hook up the lc-1 to a 12v, get your laptop with a serial port (or u can get a serial to usb cord, because not all laptops have serial ports) and there u go u can see ur air/fuel ratio. Quote Link to comment
datzenmike Posted August 25, 2010 Report Share Posted August 25, 2010 Even better, pull the EGR tube from the manifold and mount it there. Quote Link to comment
NCRmtrsprts510 Posted August 25, 2010 Author Report Share Posted August 25, 2010 Even better, pull the EGR tube from the manifold and mount it there. thats IF you have a egr.. lol Quote Link to comment
RoadRace Posted August 26, 2010 Report Share Posted August 26, 2010 are you correcting based on theoretical load or by altitude? what the FP at full load - does correct over boost? how much, 10 - 15 psi over boost? Quote Link to comment
DISLEXICDIME Posted August 26, 2010 Report Share Posted August 26, 2010 What is your fp supposed to be at 30 seams low Quote Link to comment
NCRmtrsprts510 Posted August 26, 2010 Author Report Share Posted August 26, 2010 are you correcting based on theoretical load or by altitude? what the FP at full load - does correct over boost? how much, 10 - 15 psi over boost? load, i think the fp goes up to about 45psi when boost What is your fp supposed to be at 30 seams low stock ca18det fp is 28psi. Quote Link to comment
DISLEXICDIME Posted August 26, 2010 Report Share Posted August 26, 2010 Wow that seems low Quote Link to comment
NCRmtrsprts510 Posted August 26, 2010 Author Report Share Posted August 26, 2010 thats at idle though. Quote Link to comment
RoadRace Posted August 27, 2010 Report Share Posted August 27, 2010 load, i think the fp goes up to about 45psi when boost stock ca18det fp is 28psi. watch the FP gauge during a run. if its on the rail and you can't see it then you have to run an extension to where you can see it. the FP should be correction over boost. generally 10 psi over boost is going to be 41psi at 1 psi manifold pressure, 42 at 2, 43 at 3, 44 at 4 and 45 at 5 lbs man press and so on. so if you're running 10 lbs boost then you should have 50 psi FP. IF your factory system is set up to run that way - as most, but not all, were. but please watch the FP gauge during a run to verify that the 'hiccups' on your data charts either align or don't align with an irregularity in the fuel pressure. Normally, i would say that you would need more FP than 45psi when going over 10 psi MP, but as it stands the AFR is Ok at WOT so that's why i'm trying to see if the system (FP, FPR, INJ) are past their reccomended service output levels - which would show up as anomolies in your data charts. watching the FP during a run is an easy way of checking that. the other is the afforementioned inj duty-cycle monitor. is this a new or after market HP fuel pump? oem or HD wired with a relay? Quote Link to comment
NCRmtrsprts510 Posted August 28, 2010 Author Report Share Posted August 28, 2010 watch the FP gauge during a run. if its on the rail and you can't see it then you have to run an extension to where you can see it. the FP should be correction over boost. generally 10 psi over boost is going to be 41psi at 1 psi manifold pressure, 42 at 2, 43 at 3, 44 at 4 and 45 at 5 lbs man press and so on. so if you're running 10 lbs boost then you should have 50 psi FP. IF your factory system is set up to run that way - as most, but not all, were. but please watch the FP gauge during a run to verify that the 'hiccups' on your data charts either align or don't align with an irregularity in the fuel pressure. Normally, i would say that you would need more FP than 45psi when going over 10 psi MP, but as it stands the AFR is Ok at WOT so that's why i'm trying to see if the system (FP, FPR, INJ) are past their reccomended service output levels - which would show up as anomolies in your data charts. watching the FP during a run is an easy way of checking that. the other is the afforementioned inj duty-cycle monitor. is this a new or after market HP fuel pump? oem or HD wired with a relay? its a walbro 255 with a relay. Quote Link to comment
DISLEXICDIME Posted August 28, 2010 Report Share Posted August 28, 2010 its a walbro 255 with a relay. a walbro can over power a stock fp regulator Quote Link to comment
NCRmtrsprts510 Posted August 28, 2010 Author Report Share Posted August 28, 2010 a walbro can over power a stock fp regulator not running a stock fpr breh, thats how i have it set to 30psi with vac. :lol: Quote Link to comment
DISLEXICDIME Posted August 28, 2010 Report Share Posted August 28, 2010 ahhhhhhh :P Quote Link to comment
sssr20det510 Posted August 28, 2010 Report Share Posted August 28, 2010 What size injectors u running? Also is your maf that close to the turbo like in your pic? Quote Link to comment
NCRmtrsprts510 Posted August 28, 2010 Author Report Share Posted August 28, 2010 What size injectors u running? Also is your maf that close to the turbo like in your pic? stock 370cc injectors, and no i moved the maf like a foot away from the turbo down by the front blinker Quote Link to comment
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