Tune question
02-04-2019, 05:28 PM
#1
Instructor
Thread Starter
Tune question
My basic question is are they worth the money and what you can expect with my current configuration. My 04 996tt cab is stock except for a Cobb OTS tune and a Speedtech 2.5 quiet exhaust. Again, I'm sure tunes probably are great on untuned cars but how much improvement would you expect if you have the same or similar configuration. Right now it usually hits between 14 and 15.6 PSI boost. Thx
02-04-2019, 06:07 PM
#2
Rennlist Member
so, it's amazing how much performance gains can be made over OTS tunes. It's not about boost, it's about how the car runs through the powerband. I'd talk to sam @bydesign, see what he'd say about what you'd expect from a custom tune.
02-04-2019, 07:35 PM
#3
Rennlist Member
Yes, custom tunes can add a fair bit, though Cobb OTS tunes are darn good on a mostly stock Turbo as well.
But before going down that route, ensure you have fresh plugs & fuel filter inspect coils for any cracking, test and fix any boost leaks...
But before going down that route, ensure you have fresh plugs & fuel filter inspect coils for any cracking, test and fix any boost leaks...
02-04-2019, 07:59 PM
#4
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tweaking a cobb ots tune on a stock car with only an "exhaust" will yield little if any *noticeable* benefit.
the reason they are ots and work as well as they do, is they are configured for exactly that circumstance. add stuff, then "tweak".
the reason they are ots and work as well as they do, is they are configured for exactly that circumstance. add stuff, then "tweak".
02-05-2019, 01:15 PM
#7
Instructor
Thread Starter
Thanks guys, I will do some more investigating. Currently I don't have any plans for hardware upgrades so it will be awhile before there are any changes. One change I would really like, to see but isn't really available, would be a flash for the tips. I flashed my BMW 335i with the software from the Alpina version and it was quite a bit better for little work. Shame there is so little that we can do with tips. I would have settled just to be able to pick an existing program already in the tip manually (and start in 1st gear) but oh well. Back to engines, what would you consider the next upgrade that isn't terrible to do cost and work wise? Turbos are great but I would use little time using them as the upgrade is several thousand dollars cost. I chose to not get the X50 just because they come in 900rpm later and I spend far more time under 5000 RPM than above it. I assume though the hybrids etc minimize those issues, just a bunch to spend on a daily driver. What are you getting out of the billets? Thanks again.
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02-05-2019, 02:14 PM
#8
billets are the most popular turbo upgrade because they make for great daily drivers. Spool is almost the same as stock, but I run 1.2bar. Its a whole different animal than stock turbos. Grab a ride in someones car...
02-05-2019, 03:29 PM
#9
Rennlist Member
Back to engines, what would you consider the next upgrade that isn't terrible to do cost and work wise?
But if you do want more power, after an exhaust and off-the-shelf tune, IMHO you really need to either have some strong expertise yourself or work with one of the great Turbo tuners we have available to us to balance out your upgrades. E.G. fuel pumps, injectors, intercoolers, turbo upgrades, and tunes for example all need to be in balance. Come up with a budget and talk to several of the top tuners that are always mentioned here and see what they think.
02-05-2019, 05:57 PM
#10
RL Community Team
Rennlist Member
Rennlist Member
You had a Tip Cayman, did you drive it in manual mode? How was manual mode not what you expected? How were you not able to keep the revs up just like a stick shift?
I find it easier to keep a Tip Turbo in the boost zone than a stick because the torque converter keeps the revs up and also adds torque at lower rpms.
02-13-2019, 07:36 AM
#11
I completely agree... The second gear starts unless you womp the throttle or push it over into manual kill the tip/turbo experience for me.
After exhaust and tune, perhaps you want to address any issues with a 15-18 year old chassis? Have you done engine mounts? Freshen the suspension?
But if you do want more power, after an exhaust and off-the-shelf tune, IMHO you really need to either have some strong expertise yourself or work with one of the great Turbo tuners we have available to us to balance out your upgrades. E.G. fuel pumps, injectors, intercoolers, turbo upgrades, and tunes for example all need to be in balance. Come up with a budget and talk to several of the top tuners that are always mentioned here and see what they think.
After exhaust and tune, perhaps you want to address any issues with a 15-18 year old chassis? Have you done engine mounts? Freshen the suspension?
But if you do want more power, after an exhaust and off-the-shelf tune, IMHO you really need to either have some strong expertise yourself or work with one of the great Turbo tuners we have available to us to balance out your upgrades. E.G. fuel pumps, injectors, intercoolers, turbo upgrades, and tunes for example all need to be in balance. Come up with a budget and talk to several of the top tuners that are always mentioned here and see what they think.
02-13-2019, 06:06 PM
#12
Rennlist Member
Kevin @ UMW (who posted above), Sam @ ByDesign, Markski, and Todd @ Protomotive are the names you'll see come up a lot. I'm sure there are others, but all of those guys have a great reputation as far as I know.
02-14-2019, 04:56 PM
#15