Dip at 5K
I could not remove the dip at 5K rpm.
The engagement rpm for that graph is is 4200 rpm, as you can see it make power before the 5K dip, but at 5K it drops. If you look at the other bisi header dyno there is a similar drop at 5K, he was able to gain there still, but the drop still exists.
I am more interested in making power on my low cam, which didn't do squat for me. I didn't spend much time on it while on the dyno, but part throttle feels so much better then before that I was sure wot would show some gains.
I really think I can pull another 5 out of it myself, and a more experienced tuner could pull a few more.
I was extremely surprised to find that my engine liked it even richer then the 12.7 I was street tuning at. Unfortunately I didn't get the a/f ratio lowered until two runs before I had to go. I spent most of the hour scratching my head trying to pull power out of it with leaning it out.
I will contact the shop and see if I can get an electronic copy of my 197 pull that I did the 157 tq and leaner mixture with, it is also the one I dropped peak timing on by about 3/4 of a degree.
EDIT: to kentuky accord, the answer plainly is yes. I am disseminated with my 10 hp gain, however I am more disappointed that I was not able to get the gain over the entire powerband. If I could have accomplished that I would have been happy. As for it not making 17 like the other bisi dyno and whatever the f20b made, I really expected it. It was my first time dyno tuning, and like I said I started off with a 2whp gain. So pulling another 8 out of it on a dyno made me happy.
I know you and others may think this is bullshit, but I really do believe there is at least 5 hp more on this setup with a better tune.
Another thought to consider is that the header is made for a 12:1 compression motor, and for a skunk2 Pro1 camshaft. I will do my best to pull more power out of it, and if worse comes to worse I will call the pro and see if he will throw some time into it.
That would be another interesting comparison wouldn't it.
Amateur bisi header tune, vs pro bisi header tune LOL, If it happens I will surely post up.
And I promise to not do anything else to the engine (except regular maintenance) and post up with higher numbers saying it gained more. That was the purpose of posting the before dyno before I did the bisi stuff. You know I am not lying.
Wow too much typing.
I could not remove the dip at 5K rpm.
The engagement rpm for that graph is is 4200 rpm, as you can see it make power before the 5K dip, but at 5K it drops. If you look at the other bisi header dyno there is a similar drop at 5K, he was able to gain there still, but the drop still exists.
I am more interested in making power on my low cam, which didn't do squat for me. I didn't spend much time on it while on the dyno, but part throttle feels so much better then before that I was sure wot would show some gains.
I really think I can pull another 5 out of it myself, and a more experienced tuner could pull a few more.
I was extremely surprised to find that my engine liked it even richer then the 12.7 I was street tuning at. Unfortunately I didn't get the a/f ratio lowered until two runs before I had to go. I spent most of the hour scratching my head trying to pull power out of it with leaning it out.
I will contact the shop and see if I can get an electronic copy of my 197 pull that I did the 157 tq and leaner mixture with, it is also the one I dropped peak timing on by about 3/4 of a degree.
EDIT: to kentuky accord, the answer plainly is yes. I am disseminated with my 10 hp gain, however I am more disappointed that I was not able to get the gain over the entire powerband. If I could have accomplished that I would have been happy. As for it not making 17 like the other bisi dyno and whatever the f20b made, I really expected it. It was my first time dyno tuning, and like I said I started off with a 2whp gain. So pulling another 8 out of it on a dyno made me happy.
I know you and others may think this is bullshit, but I really do believe there is at least 5 hp more on this setup with a better tune.
Another thought to consider is that the header is made for a 12:1 compression motor, and for a skunk2 Pro1 camshaft. I will do my best to pull more power out of it, and if worse comes to worse I will call the pro and see if he will throw some time into it.
That would be another interesting comparison wouldn't it.
Amateur bisi header tune, vs pro bisi header tune LOL, If it happens I will surely post up.
And I promise to not do anything else to the engine (except regular maintenance) and post up with higher numbers saying it gained more. That was the purpose of posting the before dyno before I did the bisi stuff. You know I am not lying.
Wow too much typing.
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