How important is 1 7/8 headers
08-15-2011, 04:25 PM
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How important is 1 7/8 headers I was trying to see how important is 1 7/8 headers on a Lt1 396 engine as far as HP wise and do I really need them?
08-15-2011, 07:32 PM
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A engine is a air pump ,more air in =more air out. you have a NA motor demanding more air to perform . restrict intake or exhaust and you hit a wall in it's potential to make more power . In-depth enough yet? If not try the search button.
08-15-2011, 09:16 PM
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I went from 1 5/8 mid tubes to 1 7/8 long tubes on my setup. I have no dyno or track results to compare but you really can "feel" the difference in power or at least I can in my set up. The car sounds much healthier, seems to honestly breath better and is much louder. Do it.
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08-16-2011, 07:46 AM
#10
need more info on the setup it self other than "its a 396" lol........more info please........CR? heads? intake? cam? Peak power rpm and peak torq rpm as of now? also converter size rear gear and weight?
on my setup a 1 7/8" helped me alot........but i also START making power at 6500.....
on my setup a 1 7/8" helped me alot........but i also START making power at 6500.....
08-16-2011, 09:23 AM
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My compression is 11:1 or a little higher cause I put impala head gasket on it. My heads are Dart pro 1 aluminum with 2.08/1.60 valves, my intake is ported by LE, also my cam is custom grind from LE which stop pulling around 6800 rpm, my gears r 4:10, 3000 stall
08-21-2011, 09:46 PM
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Think of the combined area of the additional 1/8 all the way around the outside of the circle. I'm guessing it would add up to another sq. inch of additional size for the exhaust to flow, that's significant.
