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Originally Posted by red_ghost  will hyper ground and such really improve that much? How efficient is it in comparison to running reguar 4 guage wire? I was planning on upgrading my wires. I also have about 20 feet of 0 guage blue wire left over from the batteries in the trunk. |
The Hyper Ground setup is essentially the same as any other ground wire setup that's simmilar, ie the HKS Circle Earth and such. You can look up the list of grounding points they use and do it yourself, however the Hyper Voltage system is something which to my knowledge has not been replicated by any other parts maker. You see products advertised as the same on ebay and other disreputable tuning products dealers, but they are decidedly not even close to the same.
As for gains, on most of the different applications I've seen tested, they gain a wide variety of power. Some cars will net a horsepower and a half and other models have gained as much as ten. It will increase your torque more than horsepower, and it will increase the crispness of the throttle.
The generally accepted school of thought is, newer cars in general will benefit less from the ground wire and voltage systems than an older vehicle, as manufacturer's have been picking up on these ideas and implementing them from the factory. I can tell you that aside from the exhaust ground strap on the 4.9 DeVille (which could be bigger), the grounding system leaves something to be desired and should be upgraded, whether it's DIY, Sun Auto, HKS, or another reputable brand.
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also when it comes to exhaust and hp, wouldn't a glasspack almost be the best thing because of its flow? Not sure how it would sound on a 4.9L. Sounds pretty cool on a caddy 500!
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Pretty much all of the "ricer" or tuner style mufflers are glasspack design, they're just not the same as a Cherry Bomb or such. I run a single in dual out tips-on-muffler that's glasspack, and has resonated tips. There's a huge variety of designs that would suit even the pickiest individual in these style mufflers. Or you could just run a cherry bomb with resonated tip(s)
It sounds a little different when not recorded through a cell phone, but in general it's much smoother sounding than a chamber design muffler, not as irritatingly deep and flows much better. It does get alot of condensation in it compared to the stock design, though.
If there was one thing I would change about my exhaust it would be to change the muffler from 2.5" to 3" inlet, which brings me to another point, keep as much of your stock exhaust as possible. 2.75" mandrel bent exhaust is not cheap to come across and should be saved. Most exhaust shops will try to give you crush bent 2.5" in its place, which is totally unacceptable.