Ecotec swap with new exhaust, new dyno and drag!
10-18-2016, 11:30 AM
#1
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Ecotec swap with new exhaust, new dyno and drag!
Finally got the Eco swap car back from having the entire exhaust reworked. New setup is 4-2 upper header section with 1 5/8" primaries, v banded secondaries that go all the way under the trans and over to the stock cat back flange location and merge to a 3" v-band and a 3" exhaust with Vibrant ultra quiet resonator and Borla oval muffler.
Due to matching the cylinders unevenly (1-3, 2-4) the car now sounds properly good.
The car had a huge hole in the torque curve which also showed super lean, so we had to rework the vvt tables and fueling to smooth it out.
New highest numbers are 192.5 whp and 195.4 wtq.
I was heading to Indy to hang out with concealer404 for a birthday skydive (which got rained out) and figured I would stop by the strip on the way.
That trip resulted in several of these:
Still not quite enough for me, so I will reassess the build this winter. I may even go back to a BP and build a 1.9L GT2554R setup with a billet compressor wheel for maximum spooling 275whp swaggotry. A 4.8L GM swap was also spoken of due to the potential for crazy revs.
Due to matching the cylinders unevenly (1-3, 2-4) the car now sounds properly good.
The car had a huge hole in the torque curve which also showed super lean, so we had to rework the vvt tables and fueling to smooth it out.
New highest numbers are 192.5 whp and 195.4 wtq.
I was heading to Indy to hang out with concealer404 for a birthday skydive (which got rained out) and figured I would stop by the strip on the way.
That trip resulted in several of these:
Still not quite enough for me, so I will reassess the build this winter. I may even go back to a BP and build a 1.9L GT2554R setup with a billet compressor wheel for maximum spooling 275whp swaggotry. A 4.8L GM swap was also spoken of due to the potential for crazy revs.
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10-19-2016, 11:30 PM
#13
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Very not bad. I had the fabricator add a quarter wave resonator and while loudish, does not drone one bit. It is fairly pleasant, plus the thrum of odd firing keeps the monotone 4 banger sound much more percussive and inoffensive.
Yes, chirped into 4th. 
Completely stock long block.
Completely stock long block.
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10-19-2016, 11:33 PM
#14
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You have no idea. It is making 41whp and 44 wtq more than when I rolled onto the dyno the first time. I am a fan as well, while the engine isn't quite making enough to satisfy me, the sound alone makes it worth keeping.
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10-20-2016, 08:48 PM
#17
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Technically it's a quarter wave resonator. A helmholtz chamber uses the volume of the chamber as well as orifice size for tuning and quarter wave resonators are purely a function of wavelength.
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