quick run down.
I installed my bbk ceramic coated lt's in 2005 with an off road bbk x-pipe. It sounded very good at WOT and light throttle; I drove it like this for 3 years (with no tune). However, at mid throttle it sounded like chit. It sounded like a super bad exhaust leak (popping and pinging).
Anyway, in 09 when I bought the KB kit, I also bought 2 CATCO universal catylitic converter's and welded them on to my o/r bbk x-pipe. It killed that nasty exhaust leak sound (which I attribute to the sound of the exhaust pulses bouncing around in the bbk chambered x. However, it choked my exhaust system more than just 10 horsepower like everyone says.
The first dyno session with the blower and brand new cats kicked out 360 rwhp. I was pissed. I paid over 6k for the blower + cats, and other minor bs. At that point, I was truly on fire, however I attributed it to clogged cats, because at the time i did not know about the diff between a stock MAF and the new KB 36 lb injectors. So, I ran it about a 1/2 mile to the gas station and back to fill it up with 93 octane, then we put it on a trailer and took it to the dyno.
About a month later, it was pinging on the top end, so I took it back to my tuner. He was kind enough to put it back on the dyno for me for no charge. They had to re-adjust my tune because the A/F was 12.4 with no changes to the setup. After that, it made just shy of 389 rwhp with 435 rwtq. I was happy but still kinda pissed about the fact that Kenne Bell apparently posts uncorrected dyno numbers for their HP ratings.
So, today I put the o/r h-pipe on. It sounds amazing. The thing is, if I were to put it on the dyno... I am actually sorta afraid how much rwhp it makes. I have a set of mhs stage 1 blower cams on their way. Im prolly going to have to buy a larger diameter pulley for the KB, and drop the boost. I want to make stupid HP one day... but not on a stock shortblock.
