VVE tuning struggles with night fury cam - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ksmrz · 07-26-2015, 11:19 PM

Tuning the maf was easy, using the wideband Ben map for vve isn't cutting it. Results are all over the place granted after alot of time I'm within 7% plus or minus but to me that's not close enough. I'm using efi live but the issue I'm having is after generating coefficients than the vve, its adding/subtracting fuel where I don't even make adjustments. I had to stop this weekend after getting pissed off enough and sit back and try to learn what I'm doing wrong, for instance I'm lean at 1800-2000 under a light load but go above or below and its darn close so I'm thinking I need to change my rpm for the zones to correct the issue. I reset the trims every time before I start logging and I followed swingtans tutorial for setting it up to a tee

ksmrz · 07-26-2015, 11:23 PM

I have filters for iat ect tp movement etc. Like I've said I've made a lot of progress getting the vve the shape it needs to be I think but the fine tuning ain't so easy and I realize it's going to be a best fit and won't be perfect, but I think I can get closer than where I'm at

ksmrz · 07-28-2015, 09:06 PM

I take it nobody tunes their own cars?

thahemp · 07-29-2015, 03:25 PM

Not many around here.

VE tuning is tedious. That's a lot of cells to get good data for. I usually choose an area to work on and stay in it as much as possible. I like to get a bunch of counts in the cells I actually make changes based off of. Otherwise you can chase your tail.

The last time I went through my VE table (custom OS on HPT), I did it in about 6 logging sessions focusing on a specific area each time. 20 minutes or so worth of driving each time. It is also important that the car is up to operating temp. Mine doesn't seem to log right if I try to start logging right away. The values just seem off compared to the changes I just made. I try to drive around town for a while then head outside of town and start logging.

ksmrz · 07-29-2015, 07:42 PM

That's basically what I've been doing, I had the zone edge alignment on 1 so trying to fine tune areas was messing up the others. I'll keep cracking at it. Did you adjust the iat multiplier for the injectors?

Rhino79 · 07-30-2015, 03:20 AM

Have u changed the zone rpm boundaries?

ksmrz · 07-30-2015, 02:38 PM

Yes it's set at 1300 2300 3300 4300

granatl · 07-31-2015, 07:58 PM

IDK anything about EFI Live, but maybe my document for HPT might assist you..
https://drive.google.com/open?id=1q2...waJ_md9Cb9pRAI

ksmrz · 08-03-2015, 08:53 PM

I've gotten it closer, although in the low map/light cruise regions Itll drop really rich at times. Not sure what to try?

dcpatters · 08-04-2015, 12:42 AM

I tried VVE tuning with HP tuners but ended up going back to Bluecats VE tool. Found a similar BVE sample file and went from there. Motor feels much more responsive. Was running MAF only for awhile. Really like the VE+MAF tune.

Keep in mind, the E38 PCMs have an inherent issue of running rich after a reflash. Takes a good 15-20 minutes before stabilizing.

ksmrz · 08-04-2015, 02:44 AM

I've noticed that even after resetting trims even though they are turned off I've done it by habit after each log and like you said after a drive, it settles alot closer to where I left off. I use efi live which has a virtual ve table. I think I'm going to try using furl trims instead since wot is within 1-2% on the rich side which is fine by me since I'll be using the maf aswell

thahemp · 08-04-2015, 09:54 AM

Quote:

Originally Posted by ksmrz

That's basically what I've been doing, I had the zone edge alignment on 1 so trying to fine tune areas was messing up the others. I'll keep cracking at it. Did you adjust the iat multiplier for the injectors?

I didn't mess with that. I did move the end of injection timing around a little bit based on the rough difference in the spec for the new cam. Not very scientific, but it seemed to help a little with blowing fuel straight out the open exhaust valve.

ksmrz · 08-04-2015, 01:00 PM

Yep I did that aswell around 20 some degrees.

dcpatters · 08-07-2015, 02:12 PM

Quote:

Originally Posted by thahemp

I didn't mess with that. I did move the end of injection timing around a little bit based on the rough difference in the spec for the new cam. Not very scientific, but it seemed to help a little with blowing fuel straight out the open exhaust valve.

Quote:

Originally Posted by ksmrz

Yep I did that aswell around 20 some degrees.

A lot of discussion about this on HPT forums, EOIT. Question for you guys, did you raise the values or lower them?

07-26-2015, 11:19 PM	#1
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	VVE tuning struggles with night fury cam Tuning the maf was easy, using the wideband Ben map for vve isn't cutting it. Results are all over the place granted after alot of time I'm within 7% plus or minus but to me that's not close enough. I'm using efi live but the issue I'm having is after generating coefficients than the vve, its adding/subtracting fuel where I don't even make adjustments. I had to stop this weekend after getting pissed off enough and sit back and try to learn what I'm doing wrong, for instance I'm lean at 1800-2000 under a light load but go above or below and its darn close so I'm thinking I need to change my rpm for the zones to correct the issue. I reset the trims every time before I start logging and I followed swingtans tutorial for setting it up to a tee __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself

07-26-2015, 11:23 PM	#2
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	I have filters for iat ect tp movement etc. Like I've said I've made a lot of progress getting the vve the shape it needs to be I think but the fine tuning ain't so easy and I realize it's going to be a best fit and won't be perfect, but I think I can get closer than where I'm at __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself

07-28-2015, 09:06 PM	#3
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	I take it nobody tunes their own cars? __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself

07-29-2015, 03:25 PM	#4
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	Not many around here. VE tuning is tedious. That's a lot of cells to get good data for. I usually choose an area to work on and stay in it as much as possible. I like to get a bunch of counts in the cells I actually make changes based off of. Otherwise you can chase your tail. The last time I went through my VE table (custom OS on HPT), I did it in about 6 logging sessions focusing on a specific area each time. 20 minutes or so worth of driving each time. It is also important that the car is up to operating temp. Mine doesn't seem to log right if I try to start logging right away. The values just seem off compared to the changes I just made. I try to drive around town for a while then head outside of town and start logging. __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

07-29-2015, 07:42 PM	#5
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	That's basically what I've been doing, I had the zone edge alignment on 1 so trying to fine tune areas was messing up the others. I'll keep cracking at it. Did you adjust the iat multiplier for the injectors? __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself

07-30-2015, 03:20 AM	#6
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Have u changed the zone rpm boundaries?

07-30-2015, 02:38 PM	#7
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	Yes it's set at 1300 2300 3300 4300 __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself

07-31-2015, 07:58 PM	#8
granatl Drives: 2SS RS ABM A6 Join Date: Jun 2010 Location: Pahrump, NV Posts: 273	IDK anything about EFI Live, but maybe my document for HPT might assist you.. https://drive.google.com/open?id=1q2...waJ_md9Cb9pRAI __________________ Jack Bilger

08-03-2015, 08:53 PM	#9
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	I've gotten it closer, although in the low map/light cruise regions Itll drop really rich at times. Not sure what to try? __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself

08-04-2015, 12:42 AM	#10
dcpatters Drives: 2015 Camaro SS 1LE Join Date: Dec 2014 Location: Irvine, CA Posts: 206	I tried VVE tuning with HP tuners but ended up going back to Bluecats VE tool. Found a similar BVE sample file and went from there. Motor feels much more responsive. Was running MAF only for awhile. Really like the VE+MAF tune. Keep in mind, the E38 PCMs have an inherent issue of running rich after a reflash. Takes a good 15-20 minutes before stabilizing.

08-04-2015, 02:44 AM	#11
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	I've noticed that even after resetting trims even though they are turned off I've done it by habit after each log and like you said after a drive, it settles alot closer to where I left off. I use efi live which has a virtual ve table. I think I'm going to try using furl trims instead since wot is within 1-2% on the rich side which is fine by me since I'll be using the maf aswell __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself

08-04-2015, 01:00 PM	#13
ksmrz Drives: 2010 Camaro Join Date: Oct 2014 Location: wisconsin Posts: 334	Yep I did that aswell around 20 some degrees. __________________ 2010 2SS LS3 228/235 Cam Motion custom ground cam, AI 280cc ported heads, Dynatech 1 7/8" long tubes, catless mids, CAI intake, ATI 10% UDP, CORSA cat back, Slp 160 tstat, gm 3.91s/Tru trac, EFI LIVE tuned by myself