Mantis
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« Reply #165 on: April 15, 2013, 02:16:36 PM »
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EV14 750cc 4bar
KRTE:
0.04107
TVUB
4.1899, 1.5789, 1.2002, 0.8908, 0.5094
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erroob0977
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« Reply #166 on: April 21, 2013, 10:52:09 PM »
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Bosch EV14 ~630cc at 4 bar (550cc at 3 bar)
KRKTE: 0.05745
TVUB: 3.364, 1.572, 1.128, 0.854, 0.568
FKKVS set to 1
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2004 A6 2.7T 6MT: Built motor with SRM RS6/K24s on E85
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chokee
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« Reply #167 on: July 04, 2013, 11:15:41 PM »
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First post:
Completed a PJK04 swap on my 2002 S4 at the beginning of June. stock FPR, 85mm hitachi MAF with open filter.
Noticed some inconsistencies with the 630cc dekas I had in such as not perfect idle and 10% variance of LTFT between banks. So I swapped in a set of 550cc EV14's and began a brand new tune for the car.
KRKTE - 0.05794 (running it just slightly rich because I don't have a wideband in the car yet) LTFT's are sitting around 0.93
TVUB - 2.582 1.480 1.093 0.795 0.592
FKKVS - set to all 1's
rescaled KFMIRL and KFMIOP using ME7 Tuning Wizard
KFKHFM - stock M-box values
Once warmed up this car is running wonderfully. Idle is stock and I had some accel/decel transition slight bucking with the dekas which is now gone. It also seems smoother and dare I say faster!
I have 3 questions:
Should I set KFKHFM to all 1's like I did with FKKVS or should I leave them as the stock M-box values?
My car now bucks a little bit during medium load after a cold start which has never happened before. I am going to experiment with KFFWL_0_A and KFFWL_1_A as nehalem mentioned in order to straighten this out. I was wondering if anyone could shed some light on why this would happen now with the EV14's when it never happened with stock injectors or the siemens dekas?
Can someone explain how the "factoring" works with the values in the KFFWL (warmup enrichment) tables?
Thanks in advance.
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julex
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« Reply #168 on: July 06, 2013, 06:50:44 PM »
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Just an FIY, Boschdealer.com has several flow sheets for 550, 750, 1000cc Ev14 and some other injectors here: http://www.boschdealer.com/specsheets/if you're not sure what's what, browse their home page and look at injector in question with its spec page linked from product page. |
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BerkleyJ
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« Reply #169 on: July 08, 2013, 05:54:40 AM »
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Running ev14 550s, stock fpr, RS4 maf, and RS6 turbos (old VAST RS6 setup). Would I have to do anything different than the K04 people? I'd assume the greater flow of the RS6's would mean I wouldn't have to taper the boost at higher rpms? I suppose I can worry about that later. Would I have to change anything from Tony's Base Stage 3 besides the MLHFM, KRKTE, and TVUB? Maybe FKKVS, KFFWL_0_A, and KFFWL_1_A? I think I'm gonna start with chokee's values. They seem on point to me? Would I even need to scale the maf, or is the 83mm vs 85mm negligible? Would just multipling the table by a ratio 83:85 be a bad idea? I'm a noob. Don't hurt me  |
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« Last Edit: July 10, 2013, 04:22:49 AM by BerkleyJ »
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julex
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« Reply #170 on: July 09, 2013, 10:20:40 AM »
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It wouldn't be 85:83 ratio, you have to use circle area forumla or Pi*r^2.... Hence: Pi*((85/2)^2) / Pi*((83/2)^2)
Anyway you will have to make adjustments regardless but the fueling system can adjust by a lot on the fly. You will be able to start the car even if you are off by more than 10% on fueling. Using block 032 in vag-com or variables:
rkat_w AdapAddPerTimeB1
rkat2_w AdapAddPerTimeB2
fra_w AdapMulLowRangeB1
fra2_w AdapMulLowRangeB2
frau_w AdapMulMidRangeB1
frau2_w AdapMulMidRangeB2
frao_w AdapMulHighRangeB1
frao2_w AdapMulHighRangeB2
These represent idle, low range, mid range and high range of fueling adjustments.
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BerkleyJ
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« Reply #171 on: July 10, 2013, 04:43:22 AM »
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Thanks. I have another question about FPRs. Why do people run different ones? Is it only to scale the flow of the injectors? Why would you run a 3bar FPR or a 5bar FPR over the stock FPR? And the 5120 hack. Who actually needs to read over 2.5 bar? Am I missing something here? Sorry for jacking the thread with stupid questions I'm sure I'll be back with more questions after I play around some. |
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« Last Edit: July 10, 2013, 04:45:39 AM by BerkleyJ »
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ddillenger
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« Reply #172 on: July 10, 2013, 09:05:20 AM »
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Thanks. I have another question about FPRs. Why do people run different ones? Is it only to scale the flow of the injectors? Why would you run a 3bar FPR or a 5bar FPR over the stock FPR? And the 5120 hack. Who actually needs to read over 2.5 bar? Am I missing something here? Sorry for jacking the thread with stupid questions I'm sure I'll be back with more questions after I play around some. 2.5 bar on the map is 1.5 bar manifold+1 bar atmospheric. 1.5bar=21psi if you want a working PID. As for FPR, increasing pressure gives you more headroom. 550cc injectors at 3 bar flow 710cc at 5bar. |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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BerkleyJ
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« Reply #173 on: July 10, 2013, 09:09:04 AM »
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2.5 bar on the map is 1.5 bar manifold+1 bar atmospheric. 1.5bar=21psi if you want a working PID.
Oh yeah  As for FPR, increasing pressure gives you more headroom. 550cc injectors at 3 bar flow 710cc at 5bar.
But do you NEED that headroom? EDIT: TEMIN is the minimun injection on time and really only needs changed with LARGE injectors and apparently ev14's are weird and like a higher TEMIN value. Is this correct? There seems to be a large variance in what TEMIN values people are running? |
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« Last Edit: July 10, 2013, 09:17:20 AM by BerkleyJ »
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ddillenger
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« Reply #174 on: July 10, 2013, 09:20:00 AM »
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Do not increase TEMIN. Those that do have no understanding of how fueling works. As for needing the headroom, 550s are good for stage3, but if you log and get 85+% IDC, increasing fuel pressure will keep things safe.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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BerkleyJ
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« Reply #175 on: July 10, 2013, 09:23:37 AM »
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Do not increase TEMIN. Those that do have no understanding of how fueling works. As for needing the headroom, 550s are good for stage3, but if you log and get 85+% IDC, increasing fuel pressure will keep things safe.
Thanks, (+karma). Is there a RS4 bin floating around I can use? EDIT: Last time I was experimenting (before I had my wideband setup) I had an issue with the idle surging 30 or so rpm every few seconds. Ideas? EDIT2: Whats with all the different TVUB values in here? People dont have properly scaled MAFs? |
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« Last Edit: July 10, 2013, 09:43:03 AM by BerkleyJ »
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julex
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« Reply #176 on: July 10, 2013, 11:15:31 AM »
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You need to consider your fuel pump when choosing your FPR pressure as well. Fuel pump output drops dramatically as pressure increases. With 5 bar fpr and 2bar of pressure (29psi), the pump must pump at 7bar, 101.5psi which is usually beyond most pumps ability to pump, let alone pump in volume usable for the boost level. This is why some make a choice to run 3bar fpr which is still very streetable and car idles well provided you have good injectors and tuned for them well. Difference between 3bar and 5bar is 30psi, which might mean a difference between a need to expensive fuel cell setup vs potent in-tank pump. Here is a graph to illustrate this:  |
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jibberjive
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« Reply #178 on: July 10, 2013, 12:14:31 PM »
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Just as a note on the fuel pump flow graph, part of the reason why the Walbro falls off so rapidly around 90psi is because of a built-in relief valve that is designed to open at that pressure. They can and do (at the cost of longevity?) hold better flow at pressures above that when people mod those relief valves. Of course, that is operating the pump outside of it's designed constraints, but people have been doing it successfully for years. Just an aside on that.
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BerkleyJ
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« Reply #179 on: July 10, 2013, 12:16:12 PM »
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Thanks. I just wanted the maf table, but I found it posted on the forums somewhere. Still want to look at it for comparison.
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« Last Edit: July 10, 2013, 03:52:33 PM by BerkleyJ »
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