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Old 05-07-2010, 08:42 AM   #1
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LS3 Vararam Tune Only

Just wondering if I can get some feedback from guys with the "tune only" unit on the LS3 that have LT's and full exhaust. I put the unit on, but my car will not be tuned until the 17th when it goes in for a cam upgrade...I knew I would get the low RPM cruise speed slight bucking "MAF noise" but I'm going to deal with it until the car goes to the tuner. (it's not a daily driver) I have been hearing feedback from it seems like only the same handful of guys in the Vararam thread. There seems to be hundreds of these units out there but I'm not hearing "the love" from guys that have gotten tunes. My Tuner does not sound like he wants anything to do with this Vararam unit and I'm starting to feel the same way...I guess my question is..Can this bucking be tuned out or no?? Sound off guys
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Old 05-07-2010, 09:12 AM   #2
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This can be tuned to run properly. It will just take time to get the MAF table just right. This is not something that can simply be tuned in 30 minutes unless somebody just gets lucky. I had to program a STS turbo car that had the stumble really bad. So bad that the owner had to trailer it to me. In a few hours the car purred like a stocker. It was all in the MAF tables.
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Old 05-07-2010, 09:25 AM   #3
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I got mine at the C5 fest with the vengence tune and it stil stumbles some. Looking around at my tuning options locally.
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Old 05-07-2010, 10:16 AM   #4
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It may or may not be a tuning issue. There's been some debate lately as to the reliabitly of the MAF signal. Not that it's a faulty signal, but that it's getting faulty information from massive turbulence. It's the only logical explanation, so far, as to why people are having a hard time tuning it out. It seems to work ok for some folks and others never get it worked out. Most everyone has been happy with the performance gains but the driveability issues have turned quite a few away. We have yet to get someone to post up the fuel trims and MAF data on this intake so it's hard to tell what's really going on.
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Old 05-07-2010, 10:49 AM   #5
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So I dont have an LS3 I have a A6 Vararam witha catback and VectorMotorsports tune and I am VERY satisfied with the results. I dont have any bucking or surging and the performance increase is VERY noticable. Maybe I am one of the "lucky ones" or, maybe I just dont know what surging and bucking really are. Either way, I am very happy with the vararam unit ESPECIALLY after I got it tuned.
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Old 05-07-2010, 11:30 AM   #6
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I got mine at the C5 fest with the vengence tune and it stil stumbles some. Looking around at my tuning options locally.
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Old 05-07-2010, 11:36 AM   #7
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Quote:
Originally Posted by antivenom View Post
This can be tuned to run properly. It will just take time to get the MAF table just right. This is not something that can simply be tuned in 30 minutes unless somebody just gets lucky. I had to program a STS turbo car that had the stumble really bad. So bad that the owner had to trailer it to me. In a few hours the car purred like a stocker. It was all in the MAF tables.
Man I hope so.......
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Old 05-07-2010, 11:40 AM   #8
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Quote:
Originally Posted by axis View Post
It may or may not be a tuning issue. There's been some debate lately as to the reliabitly of the MAF signal. Not that it's a faulty signal, but that it's getting faulty information from massive turbulence. It's the only logical explanation, so far, as to why people are having a hard time tuning it out. It seems to work ok for some folks and others never get it worked out. Most everyone has been happy with the performance gains but the driveability issues have turned quite a few away. We have yet to get someone to post up the fuel trims and MAF data on this intake so it's hard to tell what's really going on.
This is the same thing my Tuner is telling me....and it does make all the sense in the world...I'll keep my fingers crossed....not only for me but for Vararam too
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Old 05-07-2010, 11:45 AM   #9
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I recently watched horsepower tv with the crate ls3 and I swear the maf was just as far away as the vararam. Also if I remember right the 4th gen camaros had a close maf. If I'm right and I might not be, how are the maf signals on these motors working? Not trying to stick up for vararam at all.
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Old 05-07-2010, 11:57 AM   #10
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I agree...but no offense to you guys who posted so far...but you seem to be the same names I see in all the Vararam threads...I know ALOT of guys purchased this unit but I don't see alot of feedback...how many have tried it and had to send it back?? I love the performance when you put your foot into it I just will not put up with ANY surging or bucking at all after it gets tuned...I don't want to have to send it back. I guess I'll just have to keep my fingers crossed...not only for me ,but for Vararam too......and thanks for all the input so far.
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Old 05-07-2010, 12:50 PM   #11
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ok, I'll speak up. I have the Vararam along with LT's and a tune and I do have the stumble others are referring to. But my stumble ONLY occures when your giving it with the slightest throttle tip-in...if you're giving it ANY kind of gas (not flying around, just normal driving) it does not stumble at all.


I have not had the chance to have my car re-tuned to address the stumble. I had my work and street tune done on a day it started snowing. Wondering if a tune in the warmer weather will smooth it out....
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Old 05-07-2010, 02:29 PM   #12
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Mine was stumbling too, but the tune was not finished......it is in the shop now getting finished and if it is still there after......i am yanking it out, but i LOVE the way it looks and the way it sounds at WOT
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Old 05-07-2010, 03:23 PM   #13
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Quote:
Originally Posted by EB&D View Post
ok, I'll speak up. I have the Vararam along with LT's and a tune and I do have the stumble others are referring to. But my stumble ONLY occures when your giving it with the slightest throttle tip-in...if you're giving it ANY kind of gas (not flying around, just normal driving) it does not stumble at all.


I have not had the chance to have my car re-tuned to address the stumble. I had my work and street tune done on a day it started snowing. Wondering if a tune in the warmer weather will smooth it out....

Street tune while it was snowing? That must have been exciting... :tweetz:

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Old 05-07-2010, 05:34 PM   #14
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Quote:
Originally Posted by iwanttogofastNY View Post
Mine was stumbling too, but the tune was not finished......it is in the shop now getting finished and if it is still there after......i am yanking it out, but i LOVE the way it looks and the way it sounds at WOT
It does sound DAMN GOOD at WOT!!!
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Old 05-07-2010, 07:20 PM   #15
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My car ran great until the weather got really hot and humid. I had my car tuned for the Vararam when the weather was cooler and dry. My car ran great (no noticeable stumble/bucking) in those weather conditions.

But as mentioned, in the last week or two my car has started bucking/stumbling at lower rpms. It seems to be associated with the very hot and humid weather we are now having in my area.

I'm going to have to have my tuner take a look at it when I get a chance. But I am a little disappointed, because my car had been running perfectly in 70 degree weather.
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Old 05-08-2010, 12:31 AM   #16
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Originally Posted by EB&D View Post
ok, I'll speak up. I have the Vararam along with LT's and a tune and I do have the stumble others are referring to. But my stumble ONLY occures when your giving it with the slightest throttle tip-in...if you're giving it ANY kind of gas (not flying around, just normal driving) it does not stumble at all.
Same here, also on 48 degree mornings until it reaches operating temp
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Old 05-08-2010, 01:19 AM   #17
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Good luck and Godspeed to you fellas...I hope you can get the issues resolved.
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Old 05-10-2010, 03:09 PM   #18
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Old 05-10-2010, 03:29 PM   #19
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Mine was stumbling too, but the tune was not finished......it is in the shop now getting finished and if it is still there after......i am yanking it out, but i LOVE the way it looks and the way it sounds at WOT

So where we at? Does it stay or does it go?
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Old 05-10-2010, 03:47 PM   #20
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So where we at? Does it stay or does it go?
Hey man just talked to COW geting it at 5pm today will report back here and a pm to you as well.
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Old 05-10-2010, 04:01 PM   #21
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Hey man just talked to COW geting it at 5pm today will report back here and a pm to you as well.
Please Post up when you can....if Chuck can't Tune this thing..Nobody can
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Old 05-10-2010, 05:04 PM   #22
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Just wondering if anyone has installed a honeycomb mesh in front of the MAF to "straighten" the airflow up prior to hitting the MAF?

I read somewhere on a Vette forum, they were doing this to help some of the CAIs offered for them.
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Old 05-11-2010, 01:19 AM   #23
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Just wondering if anyone has installed a honeycomb mesh in front of the MAF to "straighten" the airflow up prior to hitting the MAF?

I read somewhere on a Vette forum, they were doing this to help some of the CAIs offered for them.
I've been wondering the same thing.

Some Z06 guys (not sure about the LS1 Vettes) had surging & hesitation issues and intermittent "Check Engine" lights when using the Vararam. For some reason the issue was much more prevelant on the 2004's. As long as the issue wasn't due to an incorrecly installed intake, installing the screen was almost a 100% fix. It cured my surging & hesitation and I went from getting an engine light at least once a week in the summer to only one in more than a year.
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Old 05-11-2010, 01:30 AM   #24
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I believe this is why Halltech came up with this. This was made for the Vette guys. Don't think it will work for our applications though.

http://www.halltechsystems.com/Hallt...r_p/hc.125.htm

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Old 05-11-2010, 09:03 AM   #25
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I can't seem to find a place that sales the honeycomb mesh...I have seen it before, but I can't find it on Bing or Google...
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