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      12-05-2012, 06:01 AM   #1
Beedub
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Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

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so.... on the m3forum the Vt2-500 is making some pretty nice gains.....
It seems running catless/ 100 cell race cats, Re-tune is giving some pretty heavy power gains...
This is on a car with nearly 90k miles!!!!! No meth either......
heres the details copied straight over.... it shows me.... i need catless and now!!! Also Evolve are clearly taking the tune to the next level, id love to know how far its being pushed and how the safety margins look, either way, Take a look at this bad boi!!!

Euro headers/cats dyno was on September 13th, 2012: 440 rwhp, 304 lb/ft tq SAE.
SS V1 stepped / HJS cats dyno was on December 4th, 2012: 464 rwhp, 314 lb/ft tq SAE.

Same dyno, same dyno operator, same gear (4th), same tune, same fuel (91 U.S. piss with the highly coveted 10% ethanol mix).
A nice difference from the improved VE with the Supersprint setup!
Sending the info to Sal to maybe richen it up a bit in the upper RPM range.
So far (600 miles with the V1/HJS), no codes, no CEL.
Car runs perfectly; a treat to drive every time.

Downstream from the headers/cats is Supersprint X-pipe with resonator, and the SS Street muffler.
Upstream is a K&N RU-3130 air filter attached to a silicone hose with a 30 degree angle at the end.
This makes for an excellent fit over the top of a stock brake duct and in front of the wheel well cover.
No part of the filter is directly exposed to the elements, or blocking any airflow through the brake duct.

Big thanks to Alex (flipm3) for putting together the graph layout below.
I'll eventually get there, but wanted to post this sometime before the next century.

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