Vararam coupling?
Thread Starter
Instructor
Joined: Aug 2014
Posts: 135
Likes: 13
From: Arcadia CA
Vararam coupling?
I bought my VR-B2 used and it came without the coupling that goes between the filter box and the MAF. My car being an '02, I figured that any old 3.5" silicone coupler off of Amazon, cut to fit, should work with my 85mm MAF. Should this be ok?
Melting Slicks
Joined: May 2014
Posts: 2,522
Likes: 108
I hope you know that the VR-B2 does not have a carb # and will not pass the visual smog check inspection in CA. A lot of work to install then uninstall to pass smog - just saying, but you may already be aware of this ?
Melting Slicks
Joined: Feb 2001
Posts: 2,804
Likes: 358
From: Northville, MI
You might think about keeping the stock accordion coupler rather than a smooth one. Other than looks, it does nothing to the performance but often requires a slight tuning adjustment....the accordion coupler turbulence was part of the original non-programmable firmware in the PCM. Over the years some had problems on decel with popping and accel with lag.
Drifting
Joined: Mar 2012
Posts: 1,959
Likes: 217
From: Victoria tx
You might think about keeping the stock accordion coupler rather than a smooth one. Other than looks, it does nothing to the performance but often requires a slight tuning adjustment....the accordion coupler turbulence was part of the original non-programmable firmware in the PCM. Over the years some had problems on decel with popping and accel with lag.
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Drifting
Joined: Mar 2018
Posts: 1,365
Likes: 414
From: New Jersey
Maybe my 04 was more sensitive to the Vararam but my car needed to be tuned. I was getting the lean codes with the stock coupler as well as with the power duct. After turning it seems to be working fine. After you install the Vararam just take a look at your fuel trims. If they are too high after driving for a few hundred miles you may need a tune.
Thread Starter
Instructor
Joined: Aug 2014
Posts: 135
Likes: 13
From: Arcadia CA
The coupler in question is the one between the MAF and filter, not the bridge and the TB. I'm just trying to find out what size to get. I've installed headers and a ported TB at the same time and I've already mailed my PCM to ECS.