headers and intake box
Discussion
ROWDYRENAULT said:
once again I have proven my incompetence with computers I posted a video on Utube with the title of Ultima Gtr on dyno with 8 into 1 headers. Tried to put the link on here and it did not work but its there. I have some other videos of different RPM ranges I will try to post. Lee
No worries, here's a link:https://www.youtube.com/watch?v=f8dUpqEq5N0
Lost a few horsepower at the peak put wound up with a much flatter torque and horsepower curve. Torque is now virtually flat from 3500 to 5100 rpm. Horse power only varies by 55 hp from 3900 rpm 6300 rpm. Redline on this engine is 7200 rpm. What the headers did was but a lot more area under the curve by bringing up both the low end and top end with a 5-10hp loss at the very peak. Car is a lot more driver friendly and probably a bit quicker on a road course because you only cross the peak values for a limited amount of time. So if you come off a corner at 3600 rpm yes you will be down a couple of percent at 4200 rpm the old peak but you,ll have greater values everywhere else. lee
https://youtu.be/ha3viAtns3w short video at idle
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