Are headers proven? Anybody with headers plz hlp
06-16-2010, 11:47 PM
#122
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I completely understand what you guys are saying but this simply isn't the case. I will try to find back to back comparisons of dyno sheets before and after a header swap. Every single dyno sheet I've ever seen shows a gain across the board.
06-16-2010, 11:49 PM
#123
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LTs are made to pick up peak power and not low end grunt, like shorties would.
More than anything it gives an "illusion" that you are losing power down low. Reason is is because say you pick up 20Rwhp up top and only 5Rwhp across the curve. It will seem like you don't have as much "get up" as you did before, even though you have more.
Hopefully I explained that in easy enough terms. Not exact on but gives you an idea of what they are talking about when they say this.
More than anything it gives an "illusion" that you are losing power down low. Reason is is because say you pick up 20Rwhp up top and only 5Rwhp across the curve. It will seem like you don't have as much "get up" as you did before, even though you have more.
Hopefully I explained that in easy enough terms. Not exact on but gives you an idea of what they are talking about when they say this.
You could argue non-stalled autos, in which case, sure, it's pretty silly for them to get long tubes because they haven't taken care of the stall first.
06-16-2010, 11:54 PM
#124
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Although this is only a few examples they do overlay a baseline with exhaust only to after the headers where installed with a tune and you can see from 2000 rpm on up it was a solid gain.
http://www.youtube.com/watch?v=lkl5-ZvGrww
http://www.lgmotorsports.com/gallery...816&fullsize=1
http://www.youtube.com/watch?v=lkl5-ZvGrww
http://www.lgmotorsports.com/gallery...816&fullsize=1
Last edited by odarabla; 06-17-2010 at 12:00 AM.
06-17-2010, 12:20 AM
#125
Thanks for explaining it better than I did Lemons
So, here is one thing to consider. How many people are racing in the RPM range where they would feel the downside of the headers? Any manual driver worth their salt is going to be in their powerband at all times, and a stalled auto, properly sized, blows WAY past the loss of "down low grunt" right into their power band.
You could argue non-stalled autos, in which case, sure, it's pretty silly for them to get long tubes because they haven't taken care of the stall first.
So, here is one thing to consider. How many people are racing in the RPM range where they would feel the downside of the headers? Any manual driver worth their salt is going to be in their powerband at all times, and a stalled auto, properly sized, blows WAY past the loss of "down low grunt" right into their power band.
You could argue non-stalled autos, in which case, sure, it's pretty silly for them to get long tubes because they haven't taken care of the stall first.
Otherwise you don't spend much time down low while racing to really matter, but that wasn't the point of me saying it. How much time do you actually spend at WOT. Now, how much time do you spend driving around at less then 2000 rpm.
Although this is only a few examples they do overlay a baseline with exhaust only to after the headers where installed with a tune and you can see from 2000 rpm on up it was a solid gain.
http://www.lgmotorsports.com/gallery...816&fullsize=1
http://www.lgmotorsports.com/gallery...816&fullsize=1
06-17-2010, 12:40 AM
#126
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I get what you are saying, but we've moved from the OP asking if headers were proven and you said you were disappointed in track times to discussing if when getting the groceries, will you notice a power loss.
06-17-2010, 12:55 AM
#127
Proportionally, I spend almost no time at WOT compared to cruising, but then again, when I'm not in the throttle, I am never saying "well this feels like I'm down a few horse power".
I get what you are saying, but we've moved from the OP asking if headers were proven and you said you were disappointed in track times to discussing if when getting the groceries, will you notice a power loss.
I get what you are saying, but we've moved from the OP asking if headers were proven and you said you were disappointed in track times to discussing if when getting the groceries, will you notice a power loss.
I can't say that I notice loss of power with my big stalled auto, but I can tell in my CTSV that it just lugs around more at lower rpms. And they killed my LT1 M6 down low, especially on the highway in 6th.
The OP, however, already has headers, he just hasn't put them on. So in his case...
