Originally Posted by 034 Motorsport
So I've been running a Neuspeed exh. system on my 2001 B5 A4 for a few years now. Its a nice system, quiet at idle and cruising, no droning, very unassuming and definitely wouldn't turn the head of the Po-po
Neuspeed system:
But one thing that's bothered me, the system makes a sharp hissing sound, like a lot of very high velocity air is being forced out of a hole that is too small. It definitely sounded restrictive, so I wanted to do some testing to see if there were some gains that could be had.
My A4 info is here: http://www.034motorsport.com/article...rticles_id=144
Its a very nice daily driver car IMO, dead nuts reliable, fast, good mileage, my Mom or Wife can drive it. Its been putting down about 230whp with the Neuspeed system, but there must be more.
So I bolted in one of our 034Motorport 3" dual muffler systems, pictured here:
This system is 3" from the turbo back, one 3" straight through Borla muffler at the center, and a Magnaflow 3" inlet dual 2.5" outlet. All connections are v-bands, all tubing stainless, etc.
Takes about an hour or two to install if you have a lift, bolts right on.
The results were pretty dramatic.
First off, the custom Motronic tuning was calling for about 22psi boost with the Neuspeed system, with the 034 exhaust boost now spiked to 32psi and wanted to hold to redline - holy! :o
So we had to actually retune the boost profile back down to 22psi just to get a good comparison.
The exh. system is definitely louder, but its not so loud that it sets off car alarms or attracts attention from the police. Most importantly, it doesn't drone or become loud on the ears cruising on the freeway. It certainly opens up when the throttle is mashed, and no more hissing, the exh. note sounds wonderful for a 1.8t IMO.
The gains:
30+ Wheel HP
25+ Wheel TQ
Full Boost approx 500rpm sooner
Turbo spools faster in transients, motor just feels more snappy all around.
See the dyno chart here:
The car obviously feels a lot faster now, and this was a great upgrade.
Some more pictures of the exhaust system installed:
Neuspeed system:
But one thing that's bothered me, the system makes a sharp hissing sound, like a lot of very high velocity air is being forced out of a hole that is too small. It definitely sounded restrictive, so I wanted to do some testing to see if there were some gains that could be had.
My A4 info is here: http://www.034motorsport.com/article...rticles_id=144
Its a very nice daily driver car IMO, dead nuts reliable, fast, good mileage, my Mom or Wife can drive it. Its been putting down about 230whp with the Neuspeed system, but there must be more.
So I bolted in one of our 034Motorport 3" dual muffler systems, pictured here:
This system is 3" from the turbo back, one 3" straight through Borla muffler at the center, and a Magnaflow 3" inlet dual 2.5" outlet. All connections are v-bands, all tubing stainless, etc.
Takes about an hour or two to install if you have a lift, bolts right on.
The results were pretty dramatic.
First off, the custom Motronic tuning was calling for about 22psi boost with the Neuspeed system, with the 034 exhaust boost now spiked to 32psi and wanted to hold to redline - holy! :o
So we had to actually retune the boost profile back down to 22psi just to get a good comparison.
The exh. system is definitely louder, but its not so loud that it sets off car alarms or attracts attention from the police. Most importantly, it doesn't drone or become loud on the ears cruising on the freeway. It certainly opens up when the throttle is mashed, and no more hissing, the exh. note sounds wonderful for a 1.8t IMO.
The gains:
30+ Wheel HP
25+ Wheel TQ
Full Boost approx 500rpm sooner
Turbo spools faster in transients, motor just feels more snappy all around.
See the dyno chart here:
The car obviously feels a lot faster now, and this was a great upgrade.
Some more pictures of the exhaust system installed:
Cat Back system consists of a 3" inlet Magna flow muffler with dual 2.25" outlets flowing into 2.25" mufflers which finally exit to 3" tips.The Turbo Back system is simply the cat back system with our high flow catalytic converter all in 3".Pricing is as follows:
* Cat Back system - 939US + Shipping
* Turbo Back system - 1099US + shipping
To see the B5 set ups simply click the following links:
http://www.034motorsport.com/product...ducts_id=13698
http://www.034motorsport.com/product...oducts_id=1274
Select the options you want and send me a PM when you are ready to order.
MY CAR IS ON AN EBAY BUDGET!! DEUTSCH REIS!
) to 22psi where the 30hp gain was made and noted as coming from the exhaust change only, meaning same boost. I understand 2.5" vs 3" and bottle necks and all that, but a 30hp gain from an already aftermarket exhaust that supposedly gives 10-15whp over stock, which we all do know it improves performance via the butt dyno, and you want to tell me that this setup goes 30whp ABOVE that already +15 or so over stock. Honestly that doesnt seem a bit far fetched to you? And in case you forgot, I went from Neuspeed catback to full v-banded 3" to 2.5" splits on my setup. Imagine that boost didnt change one bit between the two and I can tell you that my car didnt gain no 30whp, if it gained anything at all it would be difficult IMO to show even a 5-10whp gain and not show it as being due to some environmental/operating change. And this with a 3076R which a big exhaust would make WAY more gain on over a dinky 28RS
Bookmarks