V6S Tune
#121
Out of consideration for the cost of dyno time and the fact we were seeing diminishing returns on the tuning tweaks, I decided to stick with the tune from Monday night. On that tune we also confirmed the accurate A/F ratios by inserting a threaded probe into one of the threaded bungs on the tailpipe. They all stayed nicely within the 11-12 range.
I am certain, with adequate dyno time that VMax could have wrung additional performance out of the engine, but with the clutch issue, there is limited value at this time. After completing a few other projects (clutch, short-shifter, etc.), I may take another crack at tuning with L.T. headers and an overdrive pulley.
I am certain, with adequate dyno time that VMax could have wrung additional performance out of the engine, but with the clutch issue, there is limited value at this time. After completing a few other projects (clutch, short-shifter, etc.), I may take another crack at tuning with L.T. headers and an overdrive pulley.
Make sure you save that Monday night file for the V6.
#124
#125
I don't quite understand the theory behind non-detectability. Unless you are able to hide the tune in a totally separate memory sector that is encrypted, the factory could simply run a "file compare" between their tune and what they pull off a tuned ECU. How do you plan to hide the tune?
The following users liked this post:
Uncle Fishbits (02-16-2016)
#126
I don't quite understand the theory behind non-detectability. Unless you are able to hide the tune in a totally separate memory sector that is encrypted, the factory could simply run a "file compare" between their tune and what they pull off a tuned ECU. How do you plan to hide the tune?
Thanks
Bill
The following 2 users liked this post by VMaxTuning:
Uncle Fishbits (02-16-2016),
Unhingd (01-23-2016)
#127
The following users liked this post:
VMaxTuning (01-25-2016)
#128
This thread is outstanding. Thanks to all involved. Cheers. I still cannot begin to comprehend all of this, but thank you so much.
I still think of "tuning" an engine as "two guys in overalls drinking moonshine and holding wrenches". Probably been a few years since that.....
I still think of "tuning" an engine as "two guys in overalls drinking moonshine and holding wrenches". Probably been a few years since that.....
You are correct the days of tuning via a screwdriver (the kind without orange juice) are over but that doesn't mean we don't miss them.
Seeing that bowl of fire over the carb after nailing a WOT "tune" is a sorely missed memory for some of us here.
Thank You
VMax
The following users liked this post:
Uncle Fishbits (01-25-2016)
#129
#130
Speaking of missing them, you best be good at dodging the wrench...
If you can dodge a wrench, you can dodge a ball!! - YouTube
If you can dodge a wrench, you can dodge a ball!! - YouTube
Love that movie.
"Dodge, dip, dive, duck, and dodge!"
#131
For The Record...
I sent VMAX/Bill an e-mail last night essentially asking, "what's this whole tune about?" and almost immediately received a comprehensive (as in detailed) answer. It's probably not for me but I certainly did appreciate the timeliness and attentiveness shown to me. Very professional...
Last edited by RickyJay52; 01-25-2016 at 03:53 PM.
The following users liked this post:
VMaxTuning (01-26-2016)
#133
I didn't realise before that only the V8's have a x-pipe with straight pipes from the factory, and the V6's have a resonator instead of the crossover.
So I guess you might pick up a few more horses by working on the exhaust center section. Actually I wonder if the V8 center section will bolt straight in...
So I guess you might pick up a few more horses by working on the exhaust center section. Actually I wonder if the V8 center section will bolt straight in...
#134
I didn't realise before that only the V8's have a x-pipe with straight pipes from the factory, and the V6's have a resonator instead of the crossover.
So I guess you might pick up a few more horses by working on the exhaust center section. Actually I wonder if the V8 center section will bolt straight in...
Attachment 125481
Attachment 125482
So I guess you might pick up a few more horses by working on the exhaust center section. Actually I wonder if the V8 center section will bolt straight in...
Attachment 125481
Attachment 125482
Last edited by Unhingd; 02-14-2016 at 05:41 AM.
#135
It certainly would be louder and might add x amount of hp, but I would be concerned that it might destroy the symphonic sound coming from the V6. Because of the massive force of the lower frequencies coming from the V8, the unruliness of the resonator-less sound is appealing. From the higher frequency V6 sound, that type of unruliness might just result in annoying and cacophonous sound. If anyone tries this, please report back. I suppose we should hear shortly regarding the results of installing the 100/200 cell-cat and crossover pipe from VelocityAP.
I am bring the car in to have the 200 cell sport cats installed on Tues (despite recent crap weather in Chicago). I am still deciding if I should have my car tuned locally while it can be on a dyno, or go with aforementioned tuners on this forum.
#137
Unless your local tuner has extensive experience with the XKR or XJR, they will have no idea which files to enter to tweak the appropriate torque management nannies. My local tuner is widely renowned for his BMW (and MINI) and Porsche tuning, but was relatively ineffective with my V6S. From across the country, VMax was able to dial in with the data generated on the local dyno with the cooperation of my local performance shop.
#138
Unless your local tuner has extensive experience with the XKR or XJR, they will have no idea which files to enter to tweak the appropriate torque management nannies. My local tuner is widely renowned for his BMW (and MINI) and Porsche tuning, but was relatively ineffective with my V6S. From across the country, VMax was able to dial in with the data generated on the local dyno with the cooperation of my local performance shop.
Now I'm looking into the 5.0, same thing..even for the Project 7 which I now have a read to compare with...factory did the same increases to get Project 7 increase as they did for the 3.0 S version. There is still power on the table as vmax has found.
I know few pages back a lot have been debuting the difference if 3.0 to 5.0 S/C'rs..there 100% different..not even interchangeable..even the front snout is different in length. The 3.0L is shorter also in over all length. The 3.0L supercharger doesn't travel to the back of the block like the 5.0L version does.
On the older denso powertrain 5.0L, the charge bypass was vacuum controlled by a solenoid, the newer chargers(started with 3.0L, have a electric motor to control the bypass, the same bypass migrated to 5.0 when Bosch was adopted.
I have access to a test car, just not for tuning..so I'm presently researching to see if I can command more charge pressure and if the bypass will react as commanded.
I've seen the older units from the 4.2L, completely different style charger and bypass, that bypass worked with throttle control and was not in the charge valley, built into the charger like the 5.0 and 3.0 now have.
__________________
________________
Christopher Edgett
Technical Director
Velocity Automotive Performance Limited
214 Maple Ave.
Oliver, BC
Canada V0H 1T9
Office Tel: (250) 485-5126
www.VelocityAP.com
Tuning@VelocityAP.com
________________
Christopher Edgett
Technical Director
Velocity Automotive Performance Limited
214 Maple Ave.
Oliver, BC
Canada V0H 1T9
Office Tel: (250) 485-5126
www.VelocityAP.com
Tuning@VelocityAP.com
The following 2 users liked this post by Tuning@VelocityAP:
Uncle Fishbits (02-16-2016),
Unhingd (02-15-2016)
#140
I don't quite understand the theory behind non-detectability. Unless you are able to hide the tune in a totally separate memory sector that is encrypted, the factory could simply run a "file compare" between their tune and what they pull off a tuned ECU. How do you plan to hide the tune?
Anyway, you sent me a great PM about concerns of warranty.... Thanks.
Any sort of concern about voiding warranty aside, base '16 MT here... is it better to wait and have it all sorted with a final "this is what we can get out of the engine" tune?
IE I assume it will be more cost effective for you to work with Unhingd until you get it exactly where you want it, *THEN* roll it out to all the other cars?
I am sort of wondering if my neighbor who is my JLR dealer would be interested in this. He also has a McLaren and some other super cars, etc. I assume this is naive. =p
Also... is there a tutorial to help me figure out what I am looking out with this Tune. Youtube vid, etc?
OR... can you put in layman terms where the car ends up, IE 340hp on base 6cyl RWD MT ends up a 9 cyl 780hp spaceship.
Yes. I know the cars engine does not spontaneously reconfigure. Laws of thermodynamics apply. I've just had too much coffee.