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Jim
Dodge Dakota
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3/17/2002
14:08:52

Subject: Bad vibration
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Just installed 70mm TB and 4" Z-tube this weekend. All I got to say is SWEET! But, when I floor it "WOT" I get a bad vibration at the gas pedal and the hole engine feels like it is vibrating bad. Has anyone else felt this?



bernd
*GenIII*
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3/17/2002
14:53:28

RE: Bad vibration
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This is a problem with the air-flow. We're already working on a fix for it with Intense Performance. In the mean time, you can build the fix for this with a piece of sheet metal.

You'll need a flat piece of sheet metal (1/32" thick is plenty) about 1.5-2" in length and the height of the inner diameter of the tube. Bend the top and bottom edges 90 degrees and then tack weld them to the tube. This will break up the airflow and will get rid of the pedal vibration (based on the Helmholtz resonator theory).


1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous
14.55 @ 96.01mph

bernd
*GenIII*
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3/17/2002
14:57:25

RE: Bad vibration
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Almost forgot:

The sheet metal plate should be tack welded about 1" from the opening at the TB (inside the intake tube).


1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous
14.55 @ 96.01mph

Jim
Dodge Dakota
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3/17/2002
17:27:06

RE: Bad vibration
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Thanks bernd! If I don't do this fix and live with the vibration, will it hurt anything?



bigdakota87
Dodge Dakota
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3/17/2002
21:25:03

RE: Bad vibration
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One ?, what does "WOT" mean?




Jim
Dodge Dakota
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3/17/2002
22:34:45

RE: Bad vibration
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Wide Open Throttle



bernd
*GenIII*
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3/18/2002
00:21:02

RE: Bad vibration
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Haven't done any extensive/long-term damage testing on a vibrating throttle plate...don't want to see what happens either. The fix is easy to do and most muffler shops can put the small tack weld in the tube for you.


1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous
14.55 @ 96.01mph

crm
Dodge Dakota
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6/30/2002
02:41:24

RE: Bad vibration
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bernd, has anything else come up to fix this? i just installed a Fastman TB ("true" 68mm) and i get a vibration when i accelerate enough to where it shifts at ~3000 rpm. Dan told me upfront some people were experiencing this, but should i be concerned? this is something i dont wanna get rid of but i dont want it to be causing any problems either...

thanks for any help,

-adam



Pittdawg
Dodge Dakota
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5/31/2003
23:12:22

RE: Bad vibration
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was this ever resolved?



yates-in-DE
*GenIII*
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5/31/2003
23:49:04

RE: Bad vibration
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I have a simple question for all those that have this Vibration on aftermarket t-bodies.

What Transmissions do you have Autos or 5 speed Manuals?

Just a question for reference. Please let me know.

Later,

Lynn
Clic the pic

Pittdawg
Dodge Dakota
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6/01/2003
01:42:09

RE: Bad vibration
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auto here




Tracy H
Dodge Dakota
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8/08/2003
09:12:04

RE: Bad vibration
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I have an automatic also. Some have said that the factory "air hat" will fix or not cause this problem. I have found that to be untrue. Here is what I have and I still get the vibration @ 2500-3000rpm: Fastman 68mm TB, factory "air hat" & Stainless 90 Intake w/K&N Clone filter. I only got the vibration after installing the TB. Has anyone had success using the sheet metal flap in the intake?? If so, should this be installed at the filter end or near the TB?

Thanks, ~Tracy
'00 4x4 SLT QC 4.7 Auto 3.55LSD *My Dak Pics*
3" PA Body Lift, BFG AT 33x12.5x15 on AE 15x8 149's, Cranked Torsion Bars, Gibson Dual Rear Stainless Catback, Jeep H.O. Cams, Fastman 68mm TB, Stainless K&N Clone Intake, Relocated IAT, Powerslot Rotors & Hawk Pads, Autolite 3923, Stant 180 T-stat, ProComp ES-9000 Shocks, Clear Corners, T-Rex Stainless Nerf Bars ... 4.10 gears to be installed



Ian
Dodge Dakota
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12/07/2003
19:46:58

RE: Bad vibration
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bump




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