So after we saw the video a week or two ago of the AMD supercharger kit in ‘low pressure’ or stage ‘0.9’ form racing a basically stockish B7 RS4, I thought the result looked kind of…uninspiring.
It was nice to see that the AMD car was faster…but damn, the owner just dropped $12,000 in mods lol. It had better be!
I also started wondering if this was the M90 supercharger kits happening all over again. If you’ll recall, the B6/7 S4 world saw guys with $10,000 VF or PES supercharger kits running 1/4 mile times in the high 12s, which is what guys with JHM tune and full intake/exhaust mods were running…for $3,000 in mods. That was a disaster for PES and VF.
The next chapter was PES and VF flogging the SAME KITS for the RS4 guys…even though Eaton and Magnusson representatives came on the forums and showed compressor maps and data that show the RS4 flows nearly the same CFM as an M90. The result there was we had guys with $12,000-15,000 RS4 supercharger kits (not sure why they were more expensive lol) running SLOWER than RS4s with tunes and exhaust.
Well along came AMD to save the day with their TVS1900 supercharger. Big monster blower built for V8 cars, so it should be perfect right?
Let’s see…since they haven’t shared any data on the kit’s progress or performance, let’s see what happens when you race an AMD RS4 vs. a sort of stock Rs4.
Camera car: stock other than Milltek fullback (about $3,000). As users of this site know, http://audirevolution.net/forum/index.php?topic=56.0 Milltek can’t design a 4.2 exhaust for performance to save their life, so the ‘high flow cats’ and stock diameter catback are likely adding little to nothing over stock.
+1 passenger for a weight penalty
vs.
2008 RS4 with AMD supercharger ($10,000), EPL tune ($1,000), AMD catless downpipes ($600?) = $11,600 modlist
They botched the second pull with a misshift in the SC car, so let’s watch the first pull…which appears to be a roll from around 40-50 MPH to about 110 MPH
http://www.youtube.com/watch?v=XXo34TGe2bk
Pretty nice result for the supercharged car, right?
Wrong.
Unfortunately what looks like a convincing win (3 car lengths in this short pull) is really not that fantastic considering the modlist. How do we know this?
Because here is what it looks like when you race a stock RS4 vs. a PES M90 supercharged RS4 (you know…the mid 12s @ 111 PES kit)
http://www.youtube.com/watch?v=_VkKOZ95aXo
As you can see, it’s a pretty similar result. That’s not a good thing.
Want to see something even more incredible? How about if we race a stock RS4…the fastest stock RS4 ever to post a 1/4 mile time in fact (12.75 @ 108.3)…vs. a car with about $3,000 in JHM bolt ons?
Stock RS4 (Camera car) + 180 lb passenger
94 octane PetroCanada (1/4 tank)
vs
JHM tuned RS4 no passenger ($650 tune)
JHM LWFW/stage4 clutch ($1600)
JHM LW crank pulley ($350)
JHM intake spacers ($200)
Piggies just precats gutted, DIY ($free, DIY)
ECS hpipe resonator delete ($200)
$3,000 in mods
Infact…let’s see the AMD SC video side by side with the stock vs. JHM bolt ons video
Before anyone cries, let’s get a few things out of the way
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Perhaps my car had more weight in it than the car in the vs. AMD video…I had a 180 lbs passenger, and who knows what the passenger in the other video weighed. Maybe they were a female Russian gymnast.
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My car has never been carbon cleaned. So some will point to that and say that’s it…the stock car in the JHM video is a mid 13s car so it’s a useless comparison. But if you were paying attention, you would have noticed that my RS4 is actually the fastest RS4 ever to hit the dragstrip in stock form as noted above. It went 12.75 @ 108.3 at 35,000 miles…and went 12.83 @ 109.9 @ 42,000 miles…so no dice!. Further, the JHM car was carbon cleaned, but it was a year ago, and as we know carbon doesn’t sit around waiting to return. Finally, the AMD car was carbon cleaned when the kit was installed a few weeks ago I’d imagine…so the delta on carbon is probably IN THE AMD CAR’S FAVOUR
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The ‘stockish’ car in the AMD race has milltek high flow cat downpipes (stock diameter lol) and catback (stock diameter lolx2) which may give it an edge. As we’ve seen however, this setup has proven to deliver little, performance wise. The guy who sells you the $3,000 exhaust will give you a nice dyno sheet though we haven’t seen delta in performance.