JSIR
09-28-2002, 02:08 PM
Well finally made it back to the dyno after putting in the K&N Typhoon system, here is the summary.
Since my last dyno run the K&N Typhoon has added 9.2 whp gain on the dyno with the hood open, power peaked at 149.8 (basically 150 whp). When I did a run with the hood closed the gain dropped to 4.4whp, power peaked at 145.1, so hot air does affect power, the power curve shape was the same but lower at all rpms. Power would have increased beyond redline, we stopped pulling at 6700 , it probably would have topped over 150 if we took it to the rev limiter. This car could use a good 400-500 extra revs as power is pulling good to redline.
The Typhoon did increase power at all rpms which is good, as low as 2500 rpms to redline. Since the car was stock the total gain is 11.8whp with the header, midpipe, intake. I wouldn't contribute the 9.2 whp solely to the intake though, I think it was working in conjunction with the other parts already on the car. If you were to put this on a stock Civic the gain is probably around 4 whp by itself from what I can tell. The correction factor was 1.00, so the numbers put down at the wheels were actual numbers without correction.
On the exhaust side, I did one run with no muffler, just an open midpipe (2.5"). There was no power gain without the muffler, and the car was actually losing power on the upper rpm band by a couple whp. The car was making more power with the stock muffler, or at least as good as an open exhaust, pretty amazing,so I'm glad that I am keeping the stock muffler. The stock muffler is pretty free flowing.
I think my 2.5" midpipe isn't doing that great, I definitely lost bottom end torque with it since I installed it, and it seems that the car doesn't want a huge exhaust system. I will probably go with a 2" mandrel bent midpipe in the near future since the stock muffler piping is 2" , no need to go any bigger. I'm willing to bet my top end power may even increase with a smaller midpipe,just a theory though. well that's it.
Since my last dyno run the K&N Typhoon has added 9.2 whp gain on the dyno with the hood open, power peaked at 149.8 (basically 150 whp). When I did a run with the hood closed the gain dropped to 4.4whp, power peaked at 145.1, so hot air does affect power, the power curve shape was the same but lower at all rpms. Power would have increased beyond redline, we stopped pulling at 6700 , it probably would have topped over 150 if we took it to the rev limiter. This car could use a good 400-500 extra revs as power is pulling good to redline.
The Typhoon did increase power at all rpms which is good, as low as 2500 rpms to redline. Since the car was stock the total gain is 11.8whp with the header, midpipe, intake. I wouldn't contribute the 9.2 whp solely to the intake though, I think it was working in conjunction with the other parts already on the car. If you were to put this on a stock Civic the gain is probably around 4 whp by itself from what I can tell. The correction factor was 1.00, so the numbers put down at the wheels were actual numbers without correction.
On the exhaust side, I did one run with no muffler, just an open midpipe (2.5"). There was no power gain without the muffler, and the car was actually losing power on the upper rpm band by a couple whp. The car was making more power with the stock muffler, or at least as good as an open exhaust, pretty amazing,so I'm glad that I am keeping the stock muffler. The stock muffler is pretty free flowing.
I think my 2.5" midpipe isn't doing that great, I definitely lost bottom end torque with it since I installed it, and it seems that the car doesn't want a huge exhaust system. I will probably go with a 2" mandrel bent midpipe in the near future since the stock muffler piping is 2" , no need to go any bigger. I'm willing to bet my top end power may even increase with a smaller midpipe,just a theory though. well that's it.