i bought a spare set of cats on ebay for $100.00, cut a 3" hole in the side and cleaned them out. i use them when i race and i don't notice an appreciable difference in performance or noise. the stock cats work good, there certanily isn't enough HP gain to justify the expense of the cats plus...
The B & B 3" cat back produces the most HP and the most noise. If racing is your objective then go for it. However, at 1500-1900 RPM in 5th gear you can't carry on a conversation. The resonance is so bad you can’t here the radio or anything else. at 5700 RPM in 5th they sound great. I just sold...
yes N2O works...there is a "dry" system available. it does not require additional fuel source. the additional fuel is available
from your own injectors
larger displacement engines will generate more HP. they also weigh more, which may not be the best choice for a specific application. drag racing a bb will win everything else being equal. for autox a sb with fewer horses would give better balance and better times
i own a GS (427) with the LT4...the ZR-1 is faster...0-60, 0-100, 0-150, 0-180. it has a more sophisticated engine, capable of much more HP than the LT-4. the only concern about the ZR-1 is parts availability. my understanding is that GM can no longer provide items such as a water pump.
Michael...I said they were too loud before i gutted the cats...they are even louder now. my sole interest is in HP and I think they produce more. they also produce lots of noise
my 96 feels light over 140. i have had it over 150 numerious times but just aim it where you want it to go adn it stays steady. in may of 2001 i averaged 155 for 90 miles and the car worked fine. corvettes are really a remarkable vehicle.
i have the kd's and am very pleased with them. they grip and hold together at high speed (the tires are "Y" rated). i wouldn't recommend them on wet surfaces tho.
my understanding is because the LT4 has a closed loop system the cpu expects changes in thefile exhaust gasesa that are provided by the cats...if the gas is the same it creats inaccurate information for the A/F ratios. if this is not accruate someone speak up
if you leave the cats alone just bolt on the exhaust and do nothing else. if you remove the cats or gut them you need to install O2 simulators. these simulators tell the chip the exhaust is cleaner comming out of the cat alnd all is OK. my O2 simulators costs less than $100.00
i have a 3" B & B cat back. i also bought some used cats on ebay and gutted them (don't cut the into pipe just open a 4" square hole in the cat, it will eliminate alignment problems). O2 simulators are needed or performance will be worse than stock. i have not really noticed a marked improvment...
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