Z-Tube & Coupe Mid-Pipe Dyno'ed
#1
Z-Tube & Coupe Mid-Pipe Dyno'ed
I know that no one asks for it anymore but are still probably interested so I went ahead and had this done before putting on my stock intake tube and sedan mid-pipe. With the Z-Tube and Mid-Pipe (sorry I wasn't going to pay for run after run) my sedan put out a best run of 247 whp 221 wtq. After switching it out back to stock, my car had a best run of 242 whp and 222 wtq. I had a total of 6 runs done, and all 3 of the runs with the mods did a little better than the original parts. Dyno conditions were: 67 degrees, 29.92 in., 51% humidity. So if anyone is wondering whether or not the mods do anything power-wise, I'm fairly convinced that the answer is yes but nothing earth shattering. Why did I want to switch out the parts? I wanted to quiet the car down. Everything said about my stock sedan mid-pipe is true. The exhaust is just much smoother and there's no in-cabin resonance at low rpms anymore. I can hear the engine growl now. With the coupe mid-pipe I was getting a little droning and the exhaust note was inconsistent going from smooth to growling to silent and alternating randomly from there. I also noticed an increase in low-end torque but I have nothing to confirm this. I didn't ask for the dyno graphs because I'm just freaking retarded and it slipped my mind. So for everyone who has ever wondered, I hope this answers your question.
Last edited by Kaiten; 10-30-2009 at 04:32 PM. Reason: Info Update
#3
#4
#6
#7
I'm already tuned by UpRev. (My baseline numbers from when I first dynoed my car stock on this dyno was 210 whp 203.8 wtq. However, the shop lost its data along with their calibration data so I don't know how relevant this would be, since this time I'm putting up nearly identical numbers to my car when all it had was headers and the MREV + spacer. That result was 239.3 whp 216.9 wtq.) I have since put on cams and the HR Y-pipe and had the car tuned. I have the graphs now with me, but no scan. I was wrong with my info and the previous hp/tq numbers were due to spikes. The stock intake/sedan midpipe matched the z-tube/coupe midpipe horsepower-wise to 4500 rpm then took over from 4500 rpm to redline with about 5 hp being the average difference throughout. In regards to torque, the z-tube/coupe midpipe had 5 more from 3700 rpm to 4600 rpm but the stock intake/sedan midpipe takes over by that point and outperforms by about 9 to 10 wtq to 6300 rpm. The max whp/wtq with the mods was 238.3 whp 215 wtq, and my stock parts put out 238.9 whp and 211.5 wtq. Needless to say, I'm staying stock.
Last edited by Kaiten; 11-03-2009 at 07:42 PM. Reason: Clarification
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
marsman328
Northern California
1
08-11-2015 07:29 PM