Headers that are not too loud

[ZXMustang]

I do visit the drag strip every weekend. And headers have me zero gains in both ET and what matters most, MPH. Now when my whipple shows up, that will be a different story. But from full E/JLT to adding off-road TSP long tubes I didn’t pick up anything. At all.

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[K4fxd]

Its way more complicated than just length.

Exactly, but I'm not going to write an engineering paper on an internet forum.

Basically you have a sonic pulse, which is a reflection, and you have traveling gasses causing a low pressure area. The timing of these and other things add or take away power in certain RPM ranges.

 

[ZXMustang]

I only did headers in prep for boost. Spoiler after 5k miles and probably 20 quarter mile passes, I already had the driver's side stock cat starting to fold into itself. Its good I pulled them in favor of offroad headers, and didnt leave them for when I get boost. That would have be a big problem.

 

[Bill A]

Yes that is a useless increase. Unless you visit the drag strip every weekend and the infinitesimal improvement in time gets you prize money, the value is zilch.

Headers stopped being useful 30 years ago.

Headers, CAI, and a Tune add around 47 to 50 WHP. That's useless? What mod are you going to do that adds more HP for around the same cost? Nitrous? I think 50 WHP is pretty good for 3 mods. Go to any performance shop and the first thing they recommend is headers which usually adds the most HP for a reasonable price. Your next option is a power adder which is going to require headers anyway. Your power adder (Supercharger or Turbos) is going to run you 10 to 12k.

 

[ZXMustang]

Headers, CAI, and a Tune add around 47 to 50 WHP. That's useless? What mod are you going to do that adds more HP for around the same cost? Nitrous? I think 50 WHP is pretty good for 3 mods. Go to any performance shop and the first thing they recommend is headers which usually adds the most HP for a reasonable price. Your next option is a power adder which is going to require headers anyway. Your power adder (Supercharger or Turbos) is going to run you 10 to 12k.

You don’t read so good. The headers had nothing to do with the increase. With or without them you’ll see the same gains from the CAI and tune.

 

[HKusp]

Long tube headers on a Gen3 Coyote don't add more than about 20 HP on an NA car, and as was stated, it's not down low where you'd feel it. CAI on a Gen3 in some instances hurts HP. The tune can net you most, if not all of those gains, depending on who is tuning the car. There are PLENTY of boosted E85 Gen 2 and Gen3 800+rwhp cars on the stock cats and headers. The Stock set-up isn't nearly as restrictive as many seem to think. They are expensive, and they are not a fun easy installation. That money is definitely best spent elsewhere, like fuel system, or suspension/ brakes.

 

[K4fxd]

Had a few minuets so I found a back to back dyno of headers vs no headers. It is both a CAI and headers so might get some crying, but no loss at low RPM. If fact it gained everywhere.
Red is stock
Blue is CAI only
Green is headers and CAI

 

[Cory S]

Had a few minuets so I found a back to back dyno of headers vs no headers. It is both a CAI and headers so might get some crying, but no loss at low RPM. If fact it gained everywhere.
Red is stock
Blue is CAI only
Green is headers and CAI

I believe baseline is factory calibration, and the CAI/LT’s are with tuning. Tuning is probably 70-75% of those gains in reality.

 

[K4fxd]

I believe baseline is factory calibration, and the CAI/LT’s are with tuning. Tuning is probably 70-75% of those gains in reality.

They optimized each and disabled dynamic timing. Tests same day in a 2 hour window.

Point is you don't lose low RPM power with headers.

 

[Cory S]

They optimized each and disabled dynamic timing. Tests same day in a 2 hour window.

Point is you don't lose low RPM power with headers.

Definitely not. The AVG TQ, usually rises, and more is shifted 200-400RPM lower.

 

[Jstang23]

They optimized each and disabled dynamic timing. Tests same day in a 2 hour window.

Point is you don't lose low RPM power with headers.

If we are going to play the "here's my dyno sheet" game then give me 20 minutes and I can find dyno sheets that tell every story. I have seen long tube headers loose low end power a lot, especially when you improve the back end flow but not the throttle body/front end flow.

My point was long tubes are specifically designed to increase the top end hp/ high rpm power. Shorties are designed to increase middle range hp and torque.

In the dyno sheet you provided you can see the exceptionally large dips in the power band in the middle range. It does make more power but that's not a very smooth line and I'd much rather choose a smooth line with less power than a dippy line with a little more power.

Anyways, cheers

 

[K4fxd]

@Jstang23 I think we are talking apples and oranges.

I'm saying a set of headers with 36 inch tubes will produce more avg torque below torque peak and 26 inch tubes will produce more avg above torque peak.

Block hugger or shorty headers I don't waste my time with.

 

[WildHorse]

Block hugger or shorty headers I don't waste my time with.

You running full length headers ?
if so, do they have equal length primaries ?

 

[beefcake]

headers will increase what you already have , dep

Just as the title states, I am looking for headers that won't make the car too loud. Currently, I have a Steeda H-Pipe, stock headers and non active axle back. I am looking for a little more power and sound. I don't want anything too loud though. I need help

typically the catted headers won't be as bad, and will cut down the fuel smell

let me know if i can help with a set

 

[Bill A]

You don’t read so good. The headers had nothing to do with the increase. With or without them you’ll see the same gains from the CAI and tune.

Incorrect, the headers alone added 17 WHP, no CAI and no tune. The tune was done when I added the JLT CAI. No, I didn't need a tune for the headers only. I'm not going to getting into a pissing match with you, I don't care what you think you know but it doesn't sound like you have any real data to base your information on. Let's agree to disagree.

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