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  #13  
Old 11-15-2011, 10:40 AM
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Re: Ported Throttle Body - WK2

Theres enough people running the Volant +stock TB to get an honest opinion of each...
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  #14  
Old 11-15-2011, 11:56 AM
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Looks great glad you are pleased
With the CAI and TB. Looks like the PTB is next up on my list.

Sweet ride!
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  #15  
Old 11-16-2011, 08:57 AM
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Re: Ported Throttle Body - WK2

Hey Moosehead...looks clean and sweet but got question for ya....Have any of these items changes the feeling of surge or misfire that many complain of on light acceleration?...or did yours have this issue?
DB
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Old 11-16-2011, 09:17 AM
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Re: Ported Throttle Body - WK2

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Originally Posted by xc8great View Post
Hey Moosehead...looks clean and sweet but got question for ya....Have any of these items changes the feeling of surge or misfire that many complain of on light acceleration?...or did yours have this issue?
DB
I saw 1 thread where someone was complained of misfire -- And I actually think there were seeing the torque converter locking up prematurely or the transmission gear hunting. I have seen this once or twice. I can see how people would think it is a misfire -- But it for sure something in the driveline not on the same page as the right foot.
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Old 11-16-2011, 09:31 AM
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Re: Ported Throttle Body - WK2

Hi Celly...Thanks for your reply. I Have had mine checked out many times through dealership and several data recordings through them and results to chrys engineering. The report back was that this occures as a result of a "controlled misfire" (this is report from Chrysler) along with influesnces from MDS system and convertor rapid lock/unlock occurences. They informed me this is normal and nothing further they will look for. Hence I am hoping there is something (chip/throttle body mod or air intake) that changes parameters in this setup to remove or at least minimize this issue as it drives me crazy to feel this on a new vehicle.

DB
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Old 11-16-2011, 09:37 AM
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Re: Ported Throttle Body - WK2

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Originally Posted by xc8great View Post
Hi Celly...Thanks for your reply. I Have had mine checked out many times through dealership and several data recordings through them and results to chrys engineering. The report back was that this occures as a result of a "controlled misfire" (this is report from Chrysler) along with influesnces from MDS system and convertor rapid lock/unlock occurences. They informed me this is normal and nothing further they will look for. Hence I am hoping there is something (chip/throttle body mod or air intake) that changes parameters in this setup to remove or at least minimize this issue as it drives me crazy to feel this on a new vehicle.

DB
Oh wow... How often does this happen? I have felt it like 3-4 times over 6 months, not enough for me to worry about it.

That being said, these mods will most likely not effect that. What it seems like they are saying is that when the engine goes into MDS mode, it indeed does controlled misfires to lock the charge into the cylinder to create the 'spring' effect.

If you drive around in [5] (or tow/haul) instead of [D] does it go away?

(ps. sorry to thread hijack)
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Old 11-16-2011, 09:57 AM
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Re: Ported Throttle Body - WK2

Yes ...not good. Occurs every time vehicle is driven. Light acceleration from 80 to 90 KMH going up slight grade and will miss/surge constantly unless I accelerate harder and force a downshift. Does it with tow/haul engaged also but not as noticeable with RPM higher.
Hoping Moose had same issue (as many do apparently according to Chrys) and the mod changed or helped out with it??
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Old 11-16-2011, 12:37 PM
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Re: Ported Throttle Body - WK2

Dont be surprised if Chrysler eventually releases a new PCM flash to correct this. Over the years they typically modify the stock calibration in order to improve drivability.
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Old 11-16-2011, 01:29 PM
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Re: Ported Throttle Body - WK2

^Hey xc8, sorry for delayed response. I really have never experienced this misfire, or any other shutter or whatnot so really cannot comment on this one.

My only concerns have been (1) throttle response lag from the drive by wire, unfortunately it seems this is going to have to wait on the tuners as I understand it. Yes, you can reset it temporarily, but if you drive conservatively it will relearn grandma's response pace for the sake of gas mileage, and (2) sometimes while ascending high altitude alpine passes aggressively, the lower gear may hold a bit too long before upshifting. I have yet to get the PTB in this scenario but will do so over Turkeyday and report back. Given the seemingly stronger midrange, my gut says this gets handled.
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  #22  
Old 11-16-2011, 05:39 PM
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Re: Ported Throttle Body - WK2

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Originally Posted by moosehead View Post
Rather than post a bunch of subjective commentary about how much more resposive the Hemi is now, which is true, thought it was worthy of a full butt dyno chart:

What a great response
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Old 11-17-2011, 05:07 PM
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Re: Ported Throttle Body - WK2

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Originally Posted by FlyinRyan View Post
Dont be surprised if Chrysler eventually releases a new PCM flash to correct this. Over the years they typically modify the stock calibration in order to improve drivability.

I am hoping so. TY.
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Old 11-17-2011, 05:09 PM
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Re: Ported Throttle Body - WK2

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Originally Posted by moosehead View Post
^Hey xc8, sorry for delayed response. I really have never experienced this misfire, or any other shutter or whatnot so really cannot comment on this one.

My only concerns have been (1) throttle response lag from the drive by wire, unfortunately it seems this is going to have to wait on the tuners as I understand it. Yes, you can reset it temporarily, but if you drive conservatively it will relearn grandma's response pace for the sake of gas mileage, and (2) sometimes while ascending high altitude alpine passes aggressively, the lower gear may hold a bit too long before upshifting. I have yet to get the PTB in this scenario but will do so over Turkeyday and report back. Given the seemingly stronger midrange, my gut says this gets handled.

Thank you and will look keep an eye out for your post!!
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