J-Mod Revealed

Performance Nirvana

You’ve heard about the J-Mod.  You’ve wondered, ‘how can I get the J-Mod?’  Now, finally the J-Mod is available.

When performance at all costs is your goal, J-Mod can help get you there.

Everyone knows that air flow to your motor is what makes POWER!  What few realize is that pressure losses before the turbo impact performance two and a half times as much a post-turbo losses.  The money you were saving for those big honking side mount IC’s, forget it, pre-turbo pressure losses are where it’s at, and that’s precisely what the J-Mod targets like a fat guy going for the Chocolate fountain at Golden Corral.

Extensive R&D

Born out of flow bench testing, the J-Mod delivers measurable gains in intake airflow.  Did we mention that air flow is what makes POWER!

The Secret

The J-Mod development effort involved multiple specialized tools operated by dedicated craftsmen tirelessly working to uncork more POWER from your motor.

J-Mod transforms your car’s intake system from mild to wild and unleashes all of the ground pounding POWER you’ve dreamed about.

Achieving intake bliss

The cost for this service is reasonable for all of the POWER your S4 will gain.  Contact us directly to discuss installment payment plans.

DIY

While not recommended, the following Do-It-Yourself section will give guidance to those desiring to try this at home.

Note: THIS PRODUCT IS FOR OFF ROAD USE ONLY.

Begin with your stock air box upper.

Audi B5 S4 stock airbox intake
Unmodified Stock Airbox

Got a steak?  Get a fork ’cause you could cut it on that edge.  Air doesn’t like sharp edges, and neither does the J-Mod.  After the J-Mod your intake will look like this, smooth as a babies bottom.

Modified Audi B5 S4 Airbox intake
Post J-Mod

The entire turbulence generating edge is wiped out, leaving behind a smooth curve that guides airflow along to your awaiting turbocharger.

From the inside of the airbox you can see how thoroughly the J-Mod addresses intake deficiencies.

Intake Pre-Mod
Intake Pre-Mod

The sharp edges above are wiped out, leaving behind a smooth path for the air to adhere allowing the airflow to remain laminar, minimizing intake losses and resulting in more POWER.  Look below at the finished product.

After J-Mod view of inside the airbox.
After J-Mod view of inside the airbox.

 The Real Deal

Out of curiosity I thought I’d smooth the inside edges of the airbox up near where the MAF housing fits.  Smoother is better than sharp in this location so I took a file and sandpaper to the plastic and smoothed the edge out.  As the flow bench testing showed, it did make a difference, but is so small (about 3/100’s of a psi) I doubt it matters – but hey it improves airflow and that’s a good enough claim for most after market performance products.

Airbox pressure loss chart
Airbox pressure loss various configurations

ECS Power Gasket First Look

After installing the ECS Tuning/NewSouth Performance Power Gasket and putting the car back together I went out for a drive to log the temperature of the intake manifold.

The car had not been driven for a few days while the swap was taking place, so the IM was starting off at ambient temperature, but due to the car being in the garage and the drive taking place at night as the temperatures were falling the IM temperature starts higher than the outside ambient temperature with the gasket in place.

ECS Tuning Power Gasket Temperature Results

The results are unambiguous to me that the Power Gasket does little, if anything, to lower the temperature of the intake manifold at the point along the runner that I am recording temperature.

Reinstalling AMD IC’s

Going from one extreme to the other, removing the stock side mount intercoolers and replacing them with AMD’s 17 charge row SMIC’s.

I get to alter the front end all over again for the Silver car. This will also mean going back to using the RS4 y-pipe instead of the stock y-pipe since I had been using the silicone couplers from the AMD IC outlet pipes to join the stock y-pipe to the TiAL turbo inlets.

AMD 17 Charge Row Intercoolers
AMD 17 Charge Row Intercoolers