The vibration is not due to the intake or throttle body...but rather a
resonance from the intake plenum. If you look at the factory airbox (on
the TB)...you'll notice a resonance chamber (or two depending on year)
which cut the noise to a minimum (if not completely).
- Bernd
-----Original Message-----
From: owner-dakota-truck@dakota-truck.net
[mailto:owner-dakota-truck@dakota-truck.net] On Behalf Of Ronald Wong
Sent: Tuesday, July 02, 2002 6:03 PM
To: dakota-truck@dakota-truck.net
Subject: DML: RE: Help!! Get rid of the Z-tube??
I have no problems with a K&N FIPK but then I have an F&B TB instead of
a Fastman. I don't know what the differences are but I know there's no
vibration. The only time I've ever had a vibration problem was one of
my headers being too close to the transmission case.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
For modifications see my DML Profile (URL follows)
http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
-----Original Message-----
From: owner-dakota-truck@dakota-truck.net
[mailto:owner-dakota-truck@dakota-truck.net]On Behalf Of crm
Sent: Tuesday, July 02, 2002 11:38 AM
To: dakota-truck@dakota-truck.net
Subject: DML: Help!! Get rid of the Z-tube??
hey guys, i have quite a quandry on my hands. i am having the gas pedal
vibration problem that some seem to get after installing an intake and
new/ported TB. it's serious enough to where i know it should be fixed,
but i am not sure how i wanna fix it.
i feel fairly confident that the problem can be resolved by going back
to the stock airhat that has the resonator on it, but that would mean
getitng rid of my Z-tube. the dyno doesnt lie, and i know it helped out
in the power. but, i know i want to keep the Fastman TB, so that means
finding a fix somewhere else.
Dan (the Fastman) suggested putting a little piece of sheet metal in the
Z-tube perpendicular to the TB butterfly to help create some turbulence
and help cancel/dampen the harmonics to where the vibration lessens.
however, he said he cant guarantee that it would completely resolve the
vibration. his idea was similar to what Bernd posted a while back.
my other options would be to send back the Z-tube and exchange it for a
Stage II. or, i could go back to the stock setup with a drop-in K&N,
minus that oddly directed airhorn and a larger opening in the front of
the airbox.
so help me out PLZ! i wanna make the best decision that will produce the
most power while at the same time getting rid of the vibration. i only
have a couple days left to my 30 days on the Z-tube and i'm definitely
keeping the TB. any help would be greatly appreciated.
-adam
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