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Actually it always was about restriction. If it wasn’t there wouldn’t be a need for headers . The data has been out there since the fifties. If the pipes are too big for the volume of air flow the scavenge effect is lost hence the use of collectors. Don’t mislead the audience into believing long tube headers with 3” pipes is the answer. You can repeat the same effect with a shop vac.
The exhaust behind the collectors isn't quite as important as the size of the primaries ,a 3" exhaust behind the headers is not usually to big,especially if the primaries are sized right and are the proper length for the rpm band you want your power to fall into. A set of headers with 28" long 2" diameter primaries is not gonna be a good fit on a naturally aspirated 5.7 with peak power in the 5800 to 6200 rpm range,whether there's a 2.5" or 3" exhaust behind them,while a set of 32" long by 1.75" diameter primaries will be alot better fit for producing torque where you need it,and will work good with either a 2.5" or 3" exhaust behind them.The differance between a 2.5" and 3" diameter set of exhaust pipes behind the collectors won't show as big a differance as having the wrong sized and length of primaries will.You should go back and re-read the article again,as i don't think you're quite getting the scavenging principle as well as you think
Spend the 14 minutes it takes to watch this.
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LOL crazy. Yeah the jba's junk. Outlet of the stock manifolds larger than the jba's wtf. Said F that and put the manifolds back on *****RAM Manifolds vs. Shorties
Let’s make a comparison between RAM 1500 5.7 stock manifolds and JBA shorties.Which are actually better!?TOTALFLOW Y collector install.https://youtu.be/V27lR...
One test i've never seen done is comparing a ported set of stock manifolds against a set of shorties. I've always wondered how a set of extrude honed log manifolds that are port matched to the heads would stack up against a set of say JBA shorties or any other make of shorty header.
with all of the stock manifolds on marketplace for less than 100$ a pair the machining could cost up to 1000$ and it would still be worth it! assuming the afe shorties being a few hundred more than that in Canadian tire money and more PIA to install this could be interesting.
600hp not under 400hpSpend the 14 minutes it takes to watch this.
The Power of 2.5- vs. 3-Inch Exhaust - Engine Masters Ep. 9
You're sitting around with your typical street/strip V-8 and wondering, should I get 2.5-inch-diameter exhaust pipes and mufflers, or should I go 3-inch? In ...
This is exactly correct. But that’s not the pointLong Tube vs Short Tube Headers | The Technical Differences
A lot of people know that long tube headers generally make more power than short-tube headers, but not many people talk about the technical reasons for that ...
This is about combos with long tube headers . 400hp with an LS is easy and long tube headers, even cheap one are beneficialHOW MUCH POWER ARE LONG-TUBE HEADERS REALLY WQRTH? JUNKYARD 6.0L LS HEADER TEST!
STOCK LS MANIFOLDS VS HEADERS, STOCK CAM, TRUCK CAM & BLOWER.DO HEADERS REALLY ADD POWER ON A STOCK 6.0L LS MOTOR? HOW MUCH ARE HEADERS WORTH ON A MILD CAMME...
Once again power adders for over 400hpSKIP Shorty Headers? Why...
Professional Shops recommend skipping Shorty Header for Long tube headers - let's see what the hp & torque gains are when Shorty Headers are added to the 5.7...
You’re getting desperate.The Complete Shorty Header Install Guide for a Dodge RAM 1500
JBA SHORTY HEADERShttps://amzn.to/30jxRbyNEW MANIFOLD GASKETS (DONT USE THE CHEAP SUPPLIED ONES WITH THE HEADERS) THEY LEAK!!!https://amzn.to/2YtBSbELOCKING...
Yea i don't think so,lol Just pointing out you're in over your head,and don't really have a clue about exhaust systems,lol
Exhaust gasket,and port match the manifold to it.The port match anybody can do with a die grinder and carbide bit and sanding rolls,but the extrude honing is something you'll have to have done by an outfit that specializes in it.
