For those of you who have invested in Long tubes and have had them dynoed . Would you make the purchase again ? I have a case of exhaust "gotta have it fever" and am trying to justify the purchase. I have used the search function and seen no factual reportable HP gains other than sound. I would appreciate any inputs .For or against

Who has the best price for the Dynatechs?If I decide to get this for an early x-mas present for myself.

 

Well, you prolly can't find any because on anything less than
a built motor running gobs of boost, there isn't any .....

 

Hardware man, A full exhaust is pretty big money, then add labor to install and re dyno and 2500.00 is an easy number to hit. I have Kooks long tubes, high flow cats and a single muffler Magnaflow cat back. I have basic bolt ons, 4lb lower, JL ram air, throttle body, chip, FTVB and 4x4 pan, JL's traction bars- nothing fancy... I picked up about 12 hp and 20ft pounds on torque, is that enough to justify the cost???? I guess that depends on you. I have been very happy the the purchase and the truck sounds flat out bad a**, are you going to set the world on fire with an exhaust upgrade, no, but it is fun!!

just a side thought- Another option is,you could buy a nice stainless cat back from the tuner of your choice and put the rest of the cash into a blower upgrade, say a magnum powers from JDM and pick up 40-50 hp easy with a few bolt-ons. good luck, Todd

 

If it is 2500 bucks for 12 HP that is a Big Hell no

 

Im sure you can find a full set up for around $1200. Its not that tough to install yourself. Add on 3 to $400 in dyno time and a retune your only $1600 in the hole maybe less.

 

Thats on my combo, and the above post is correct deals can be had with the right timing and smart shopping, take out labor cost and do it yourself and 1500.00 plus dyno time can happen. I look at it like it's part of the package to get the truck to where I want it to be, I had JDM do the install and Dyno when complete and I have had zero issues in over a year, when I move up to a motor and blower combo I'll be ready to go. Good luck, Todd

 

Exactly. If you can't do the labor yourself, I'm not sure its worth it from a power gain standpoint.

Even $1200+, I'd rather put towards a KB or Whipple blower. Same boost as I'm running now (13+psi) and pick up 50-60rwhp, with gobs of potential in the future.

 

the amount of horsepower gained is relevant to the amount of mods you have, someone with a big pulley, heads and cams will probably gain significantly more than someone with no or little mods. plus they remove heat better from the motor which is a must for racing in higher hp situation

 

Do you have long tubes??? Have you dyno'd your truck before and after??? You are wrong.

The thing is with long tubes and highflows......you don't wanna look at PEAK number for gains. You will see your gains under the Peak numbers, especially in the mid range. If you don't know how to read your dyno charts ask, and someone will point the gains out.

I'll agree totally that the full exhaust was last on my mod list only because of price. But then i added up all the money on stupid crap i spent and i should have done it a long time ago. YOU DON"T HAVE TO HAVE A BUILT MOTOR to reap the benifits of headers and highflows.

https://www.f150online.com/forums/sh...hlight=exhaust

As far at the install goes, it's not hard at all. You just need to know the trucks and you can have your old exhaust off and the new one on in the better part of an afternoon.

Once you have it on, the sound alone is worth every penny.

Here's a link to before and after on Superford's stock 04

 

do a search using my screen name as a keyword.

I know that I've posted replies to this same question numerous times.

I dyno'd my '03 bone stock, and bone stock with ONLY the addition of JDM/Kooks long tubes, high flow cats, and JDM/Magnaflow cat back.

I gained 18peak rwhp and about 30ft/lbs of torque across the entire rpm range!

again, this was with the truck otherwise BONE STOCK, no chip, no pulley, etc.

I'd be interested to know how much HP I'd lose if I took the exhaust off and went back to my stock setup right now.

anyway, full exhaust can definately be considered an expensive mod, but it definately helps, not worthless.

later,
chris

 

So will I lose HP w/ this mod? I will lose 2# boost. I am running a 6# pulley now.

 

that is why i did it and more hp with less boost is always good and yes you will loose boost. My dynatechs, from Dynatech (by the way best price i could find), offset my apten port on the blower boost wise.

 

will you lose HP?

no...

you may lose boost, but boost is not a measure of HP.

 

I may be wrong here but Boost measures pressure.
With a freer flowing exhaust, there is less back-pressure therefore there is less "boost" measured on your gauge.


Crimp your exhaust almost completely shut and rev her up and watch, you'll see probably 30psi of boost.


So with a full freer flowing exhaust, you won't lose power, but you'll realize less boost.

Who ever said less boost is a bad thing? Not in this situation

 

So this mod is insurance on the motor. Allowing it to breath better will allow longevity of the block,plus make the power more effecient. True?