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Old 05-10-2011, 08:19 PM   #1
Caden
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Default Cobb AP vrs Open source tune...

Hey guys I live up in montana and was just wondering if I should get a ap or open source tune... I have a turboback system and an uppipe. I don't know where I can get a open source tune and if I got a cobb accessport then later on I would probably get a protune..
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Old 05-10-2011, 08:23 PM   #2
boxer fanatic
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You can get a protune with open source at most shops. Opensource is way cheaper and can do everything the AP can do other than switch maps on the fly.
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Old 05-10-2011, 08:27 PM   #3
boxer fanatic
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You can also get a tactrix cable and flash opensource OTS maps as well from romraider.com
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Old 05-10-2011, 09:47 PM   #4
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E-tuning is another good option if you dont have a reputable tuner near
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Old 05-10-2011, 09:50 PM   #5
boxer fanatic
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Yes e-tuning is great and usually pretty affordable. I got e-tuned for $150.
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Old 05-10-2011, 10:08 PM   #6
JRizzy24
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Highly suggest Open Source or E-tune over a COBB. Contact Phatron
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Old 05-10-2011, 11:29 PM   #7
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I'm a big believer in Open Source, but I'm not so sure about e-tunes. I don't think tuning a car sight unseen will result in the best, or even most reliable tune.
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Old 05-11-2011, 12:00 AM   #8
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I got an etune on e85 and made 324awhp and 300awtq on airboys. Been running it for 4000 miles now and no problems at all. Etunes can be just as good as a face to face tune. It really just depends on who does it in my opinion.
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Old 05-11-2011, 12:05 AM   #9
Caden
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Thanks for the posts everyone! I just found a guy that does open source tunes and I am going to just do that!
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Old 05-11-2011, 02:41 AM   #10
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D00d, you don't have either of those things yet. Slow down.
Also, open source is much more cost-effective.
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Old 05-11-2011, 08:43 AM   #11
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double post

Last edited by boxer fanatic; 05-17-2011 at 04:49 PM.
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Old 05-17-2011, 02:36 PM   #12
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What about a dyno open source tune versus a UTEC? is there any advantage to to using a piggyback computer with the factory ECU or can better results be had with open source and a dyno alone? I currently have an older TubroXS UTEC but wonder if I would see better results with Open Source. I have been told that the piggy back ends up "fighting" the stock ECU and effect the smoothness, power delivery (though not over all power), and gas milage. I'm hoping to set it and forget it so programming options and multiple maps are not an issue. any thoughts

Last edited by andersonwrx; 05-17-2011 at 02:47 PM.
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Old 05-17-2011, 02:49 PM   #13
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dyno tunes are gay. do you drive your car on a dyno? NO. you drive it on the street.
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Old 05-17-2011, 02:57 PM   #14
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Quote:
Originally Posted by Cefaln452 View Post
dyno tunes are gay. do you drive your car on a dyno? NO. you drive it on the street.
...he says to the officer while being led to the backseat of his cruiser.
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Old 05-17-2011, 03:00 PM   #15
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fuggem. you cant dial in a car on a dyno as you can on the road.... idk about you, but I like drivability
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Old 05-17-2011, 03:10 PM   #16
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Quote:
Originally Posted by Cefaln452 View Post
fuggem. you cant dial in a car on a dyno as you can on the road.... idk about you, but I like drivability
A good tune should use both. The dyno is indispensable for comparing the change in power due to changes in the tune, while the street is indispensable for tuning driveability. A tune that is developed using only one or the other will be leaving something on the table, be it power or repeatable behavior under multiple conditions.
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Old 05-17-2011, 03:12 PM   #17
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I like drivability as well. However, to dismiss a dyno tune as "gay" simply because it's not a road tune, is, well..... gay. Everything has its place.

Though with all other things equal, a good dyno tune and/or a road tune will still be "better" than any ots Accessport map.
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Old 05-17-2011, 03:12 PM   #18
the suicidal eggroll
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Quote:
Originally Posted by andersonwrx View Post
What about a dyno open source tune versus a UTEC? is there any advantage to to using a piggyback computer with the factory ECU or can better results be had with open source and a dyno alone? I currently have an older TubroXS UTEC but wonder if I would see better results with Open Source. I have been told that the piggy back ends up "fighting" the stock ECU and effect the smoothness, power delivery (though not over all power), and gas milage. I'm hoping to set it and forget it so programming options and multiple maps are not an issue. any thoughts
There are tradeoffs

open source has the advantage of not having to switch back and forth between processors, which can lead to stumbling and other driveability problems.

UTEC has the advantage of full control over the parameters (not everything is defined in open source), speed density, on the fly map switching, etc.
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Old 05-17-2011, 03:32 PM   #19
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Im just making the point about how some people who tune JUST on dyno... thats not right at all.
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Old 05-17-2011, 04:03 PM   #20
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Quote:
Originally Posted by Cefaln452 View Post
Im just making the point about how some people who tune JUST on dyno... thats not right at all.
Why is that not right at all? You can take the engine through any load/rev that you would see on the road. When you tune on a road you still do the same pulls through gears you'd do on a dyno. In terms of the engine what situation is going to occur doing a pull on the road that won't happen on a dyno?

You what isn't right at all, doing +100mph on a public road beacuse you want a few more horsepower.
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Old 05-17-2011, 04:13 PM   #21
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you take a car that just got a tune off the dyno and not tweaked on the street... the drivability is going to be terrible. take that same car in bumper to bumper traffic..... same deal. Now road tune it afterwards, now youre getting somewhere.
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Old 05-17-2011, 04:14 PM   #22
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Quote:
Originally Posted by OUScooby View Post
Why is that not right at all? You can take the engine through any load/rev that you would see on the road. When you tune on a road you still do the same pulls through gears you'd do on a dyno. In terms of the engine what situation is going to occur doing a pull on the road that won't happen on a dyno?

You what isn't right at all, doing +100mph on a public road beacuse you want a few more horsepower.
dyno queens talk numbers. WHO cares about 1 more hp you can squeeze out on the dyno... again, you dont drive your car on the dyno do you? YOU drive it on the street under normal conditions, traffic etc.
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Old 05-17-2011, 04:20 PM   #23
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Depends on the open source tune? I have had both. I had a COBB AP and I had an Open Source from Dale @boxer4racing in NC. Personally the Cost effectiviness of the Open Source, not to mention smoother powerband in this instance, made the COBB a waste of money to me. Just my .02
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Old 05-17-2011, 06:12 PM   #24
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Any more info on this E-tune thing? Places to send it ETC? I'm in Alberta, Canada and there arent any tuners close by.
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Old 05-17-2011, 06:15 PM   #25
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I tuned my car last year and it was fron the accessport. I used it literally 3 times to monitor some data and that was about it. To me i paid an extra 500 dollars for something that is only useful around tune time. There is pros and cons to it. Being that i do not have guages mounted in the car it works as my guage.
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