PDA

View Full Version : Stock Exhaust vs Modified Apexi WS2



incog6
06-24-2007, 01:07 PM
Vehicle: 2006 Evo IX
Stock Exhaust vs. Modified Apexi WS2

Stock Exhaust
-stock dp
-stock catalytic converter
-stock catback

Modified Apexi WS2
-stock dp
-RRE Rally cat
-modified WS2 midpipe: RRE 3x24 SS Resonator, 3" SS piping, RRE SS o2 bung, RRE SS 3" flange
-unmodified Apexi WS2 axle back

The following aural tests were with a Radio Shack Sound Level Meter (33-2055). Weighting A tests db ranging from 500hz-10000hz *human ear range. Weighting C test db ranging from 30hz-20000hz.

Stock Exhaust:
Idle:
-Weighting A:
3ft away from tip: 81db
10ft away from tip: 68db
-Weighting C:
3ft away from tip: 100db
10ft away from tip: 87db

3K:
-Weighting A:
3ft away from tip: 83db
10ft away from tip: 75db
-Weighting C:
3ft away from tip: 94db
10ft away from tip: 85db

5K:
-Weighting A:
3ft away from tip: 87db **fluke?
10ft away from tip: 85db
-Weighting C:
3ft away from tip: 91db
10ft away from tip: 85db

Modified WS2:
Idle:
-Weighting A:
3ft away from tip: 80db
10ft away from tip: 71db
-Weighting C:
3ft away from tip: 98db
10ft away from tip: 88db

3K:
-Weighting A:
3ft away from tip: 86db
10ft away from tip: 79db
-Weighting C:
3ft away from tip: 98db
10ft away from tip: 91db

5K:
-Weighting A:
3ft away from tip: 87db
10ft away from tip: 84db
-Weighting C:
3ft away from tip: 94db
10ft away from tip: 86db

*****movie clips to come
*****70mph cruise and WOT test results to come
Apexi WS2 midpipe
http://img502.imageshack.us/img502/8043/p1000522axb7.jpg (http://imageshack.us)

Stock Cat vs RRE Rally Cat
http://img103.imageshack.us/img103/9471/p1000523abe1.jpg (http://imageshack.us)
http://img254.imageshack.us/img254/4268/p1000525asb9.jpg (http://imageshack.us)

Stock Cat Weight
http://img377.imageshack.us/img377/977/p1000540azz1.jpg (http://imageshack.us)

RRE Cat Weight
http://img259.imageshack.us/img259/1144/p1000541agf1.jpg (http://imageshack.us)

Modified WS2 Midpipe (top) vs Unmodified WS2 Midpipe (bottom) *less 3" portion
http://img259.imageshack.us/img259/7256/p1000531axk5.jpg (http://imageshack.us)

Modified WS2 Midpipe (top) vs Unmodified WS2 Midpipe (bottom) *less 3" portion
http://img50.imageshack.us/img50/1873/p1000537ano0.jpg (http://imageshack.us)
http://img107.imageshack.us/img107/5682/p1000538aoh3.jpg (http://imageshack.us)

Modified WS2 Midpipe (top) vs Unmodified WS2 Midpipe (bottom) *less 3" portion
http://img107.imageshack.us/img107/4115/p1000528ajv3.jpg (http://imageshack.us)
http://img107.imageshack.us/img107/9913/p1000530aoc2.jpg (http://imageshack.us)

Finished Product
http://img253.imageshack.us/img253/4175/p1000546akk4.jpg (http://imageshack.us)

JDMC-WestEVO
06-24-2007, 01:20 PM
nice bump for you

white9
06-24-2007, 01:27 PM
pretty detailed.. i like :grin:

EVO Neil
06-24-2007, 02:36 PM
Moving to tech and making a sticky. Good info!