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Old 12-20-2013, 11:28 AM   #1
duffmobile
 
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Surging Issue with Kenne Bell

Would anyone with HP tuners be willing to look at my tune file? Car is an automatic with the 2.8LC Kenne Bell and Ted's custom 4 " intake pipe.

My shop claims they have done "all they can" but I just don't think they know what they are doing.

RPMs surge up and down at idle, and while cruising will randomly surge / buck the car every minute or so. It's very annoying.

Just looking for some additional opinions please. Car is in storage for the winter and I don't have a handheld tuner to modify so it's not a huge rush. Appreciate any input
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Old 12-20-2013, 11:34 AM   #2
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If you were closer we would get you taken care of, im sure someone up there can help you out
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Old 12-20-2013, 12:15 PM   #3
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Quote:
Originally Posted by duffmobile View Post
Would anyone with HP tuners be willing to look at my tune file? Car is an automatic with the 2.8LC Kenne Bell and Ted's custom 4 " intake pipe.

My shop claims they have done "all they can" but I just don't think they know what they are doing.

RPMs surge up and down at idle, and while cruising will randomly surge / buck the car every minute or so. It's very annoying.

Just looking for some additional opinions please. Car is in storage for the winter and I don't have a handheld tuner to modify so it's not a huge rush. Appreciate any input
i have the same issue with my car, i got the new style by pass valve from kenne bell made for cammed cars. havent had much of a chance to drive since install thanks to mother nature. may want to try that. if it is a newer blower and bypass valve it will have a red button in the middle of the bypass valve. it is located on the pass side near the back of the small tube that runs along blower housing.
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Old 12-21-2013, 05:46 PM   #4
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Stock TB?
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Old 12-21-2013, 07:47 PM   #5
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Quote:
Originally Posted by H-E View Post
Stock TB?
Stock but it's the Vmax one.
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Old 12-30-2013, 09:58 AM   #6
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anyone out there able to review my HP tuners file?
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Old 12-30-2013, 11:29 AM   #7
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Did you try your tuner guy?
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Old 12-31-2013, 10:48 AM   #8
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tuner guy says he's done all he can. I also asked him how much boost my car makes and he says he thinks 6-7 lbs. I asked if it was in the tune file and here was his answer:

"One bar OS's will only record up to 1bar (zero vacuum). Without converting to a 2+ bar OS, the computer won't record boost. We had the shop's manual boost gage hooked up, but that's not recorded on anything. "

Sound legit or weird?
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Old 01-01-2014, 05:01 PM   #9
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Speed inc should be able to help you out.
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Old 01-07-2014, 08:08 AM   #10
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look up mike norris motorsports, he is indy and has tuned my kb a couple times...gret shop..also he is member here
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Old 01-09-2014, 12:10 PM   #11
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I'm only talking about my personal car here...
When I got my car back from the turbo install, it surged like crazy too; almost make a person seasick on the highway. As I learned HP Tuners, I realized they had disabled the Speed Density part of our computers. So, where you're mentioning the 1-bar option in HP Tuners, GM doesn't have a Speed Density map in our cars, but is rather calculated on-the-fly from a series of formulas. HP Tuners can disable the formulas, and put on an OS that uses the old-style SD table; but you've already mentioned the limitation with that.

Once I learned how to use the Bluecat tool to convert from the SD formulas to a table and back again, I noticed my surging disappeared and fixed other driveability quirks. As them if they've updated your MAF^2/etc. formulas, or if they simply switched you to MAF-only mode.
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