Straightening my pipes

[dom w. forte]

That is why I am also putting a CAI on it.

In all seriousness, I am a bit confused... the research I've done suggests a boost in performance especially at the low end so I am a bit confused...

If you are reading magazines they always tell you that you get more power with there modifications.
Engines are air pumps, there is air speed and air volume, air speed increases low in torque, air volume increases hp if the camshaft is capable of the flow, if you increase volume by going to duals it ussally decreases air speed and inturn reduces low and midrange power.
If you add a cold air intake , which by the way the factory engines are already sucking air off the front which is cold, make sure it isnt chrome or stainless but plastic so as to not conduct heat to air, and also that it is not under the hood but still takes air from factory inlet.
If the air system is a oil lubed filter you can damage the mass air flow and run a lean condition and damage pistons.
We have done performance work for years and when you do changes you have to look at the entire picture , all specs on exsisting motor and determine if there is any defficences that can be improved , but we have seen very little improvement in duals and in most cases a decrease in performance and fuel economy, but most because the exhaust is louder say that there vehicle is faster.
How many out there with trucks run the tail gait down or a flow through system such as net or bars?
We have looked at factory wind tunnle testing and the trucks accually get more mileage and less drag with the tail gait closed , because it creates an air bubble that the air flows over without a preasure drop on the bottom.

[petrey10]

right on ^^^^^

[91Terminator]

if you really want to actually see some differences in your trucks performance, then you should quite wasting your time on all this cheap little stuff and go to www.kennebell.net if anything will make your car truck whatever it may be perform like you want it then this will.

__________________________________________________ __________________________________________________ __________
Fact Not Fiction, Cant Stand The Heat Then Get Out The Kitchen, If Not Then Step Up And Get Some!

[jwanck11]

If you are reading magazines they always tell you that you get more power with there modifications.
Engines are air pumps, there is air speed and air volume, air speed increases low in torque, air volume increases hp if the camshaft is capable of the flow, if you increase volume by going to duals it ussally decreases air speed and inturn reduces low and midrange power.
If you add a cold air intake , which by the way the factory engines are already sucking air off the front which is cold, make sure it isnt chrome or stainless but plastic so as to not conduct heat to air, and also that it is not under the hood but still takes air from factory inlet.
If the air system is a oil lubed filter you can damage the mass air flow and run a lean condition and damage pistons.
We have done performance work for years and when you do changes you have to look at the entire picture , all specs on exsisting motor and determine if there is any defficences that can be improved , but we have seen very little improvement in duals and in most cases a decrease in performance and fuel economy, but most because the exhaust is louder say that there vehicle is faster.
How many out there with trucks run the tail gait down or a flow through system such as net or bars?
We have looked at factory wind tunnle testing and the trucks accually get more mileage and less drag with the tail gait closed , because it creates an air bubble that the air flows over without a preasure drop on the bottom.

Thanks Dom. My research is not magazine based, but reports that are dyno based (empirical).

I will look into the concepts you presented regarding running lean etc. I am just not sure that matters in that the sleeve/pistons, etc are cooled externally. Rich/lean ratio certainly does matter in an engine that uses oil in the gas for lubrication/cooling!

As for the tailgate up/down - I saw this one on Mythbusters. If I am not mistaken, there is no advantage either way...

Lastly, the headers dump into a single pipe that goes to the cat which, through a single pipe goes to the muffler which (only) then splits into two. Putting on duals, from my research is not what affects the airflow as much as it is the muffler and potential increase in the diameter of the pipe (if that is the case) that is utilized.

Regardless, I am putting on a Rousch CAI and a Magnaflow Dual set up. I will take it to a tuner to ensure there is a stable tune done and the power increase maximized.... At some point, I do want to pick up a tuner unit myself, I am just outta $$$.

Thanks for your input!

[jwanck11]

if you really want to actually see some differences in your trucks performance, then you should quite wasting your time on all this cheap little stuff and go to www.kennebell.net if anything will make your car truck whatever it may be perform like you want it then this will.

__________________________________________________ __________________________________________________ __________
Fact Not Fiction, Cant Stand The Heat Then Get Out The Kitchen, If Not Then Step Up And Get Some!

LOL. No need to go that far... especially for the price.

[91Terminator]

LOL. No need to go that far... especially for the price.

You will end up spending at least 2,500 on chips and tuners and pipes and whatnot before your satisfied for only 10 to 15 Hp if you even get any, all you got to do is spend about 3,500 and you got your self at least 100 Hp and thats a guarantee, no arguing the fact that superchargers work or dont its reality!

Then if your not satisfied with the 100hp you get from it you call them up and say get me a smaller pulley and then 80.00 later you got your self 180Hp!

Kenne Bell Twin Screw Superchargers - Get Screwed!

[petrey10]

^^^ pretty good sales pitch!! And it will be a complete sleeper because your truck won't sound all souped up!! Very BA if you ask me

[91Terminator]

^^^ pretty good sales pitch!! And it will be a complete sleeper because
your truck won't sound all souped up!! Very BA if you ask me

yes it would be a serious sleeper until you punch it and hear the wine of that charger.

i am telling you it is the best way and best power source, no turbo lag, no drop off of power, nothing is bad about kenne bell superchargers, you hit it and your stuck in the seat.

[Dave S]

I put duals on my truck last summer. Look at this link http://www.tigeowners.com/forum/showthread.php?t=11932
6th pics down on 1st page. They are coming out right behind the back tire like the 70's hotrod look. I did not want the Mustang GT look straight out the back. The pipes just get in the way there. I did notice a few hp gain, but I was going more for subtle look and sound. Flowmaster 44 with customs bend pipes. You can barely see the tips in the above link. It worked for me and what I wanted to do.

[dom w. forte]

Thanks Dom. My research is not magazine based, but reports that are dyno based (empirical).

I will look into the concepts you presented regarding running lean etc. I am just not sure that matters in that the sleeve/pistons, etc are cooled externally. Rich/lean ratio certainly does matter in an engine that uses oil in the gas for lubrication/cooling!

As for the tailgate up/down - I saw this one on Mythbusters. If I am not mistaken, there is no advantage either way...

Lastly, the headers dump into a single pipe that goes to the cat which, through a single pipe goes to the muffler which (only) then splits into two. Putting on duals, from my research is not what affects the airflow as much as it is the muffler and potential increase in the diameter of the pipe (if that is the case) that is utilized.

Regardless, I am putting on a Rousch CAI and a Magnaflow Dual set up. I will take it to a tuner to ensure there is a stable tune done and the power increase maximized.... At some point, I do want to pick up a tuner unit myself, I am just outta $$$.

Thanks for your input!

Before you make the change , go run some back to back runs down the track and get a good baseline, then check 60 foot times, and do a documented gas mileage log for 2 weeks , repeat the test after changes.
As for the tailgait down or up ,the tests I got to review were windtunnel testing by the manufactureres, Chevy and Ford, they were conclusive, and showed a lot of drag on the tail with the tailgaits down with mph losses and fuel economy losses.
It was impressive to watch because you could accually see with smoke the flow over the cab and a ball would start in the bed and then the smoke would just flow right over the top of the ball as the speed increased.

[jwanck11]

Yes, that showed that on Mythbusters too - but I think there is something else to factor in and that is the type of driving. I could see where it would matter if a vehicle spent most of its life at highway speeds. Having said that, if I recall the difference even in mpg was small.

I installed a Rousch CAI last night. A supercharger would be nice, but it is not what I am looking for and not for that price. I am not looking to drag (shoot I drive slow as crap) but get a little extra power and low end.

It will be interesting to see if there is any change to mpg...

Exhaust is next! Just waiting on the shipment. Dave - that is a sweet looking truck. I'll post in that thread too when I get all set up.

[dom w. forte]

Yes, that showed that on Mythbusters too - but I think there is something else to factor in and that is the type of driving. I could see where it would matter if a vehicle spent most of its life at highway speeds. Having said that, if I recall the difference even in mpg was small.

I installed a Rousch CAI last night. A supercharger would be nice, but it is not what I am looking for and not for that price. I am not looking to drag (shoot I drive slow as crap) but get a little extra power and low end.

It will be interesting to see if there is any change to mpg...

Exhaust is next! Just waiting on the shipment. Dave - that is a sweet looking truck. I'll post in that thread too when I get all set up.

I was not suggesting drag raceing , I was suggesting going to the track because 60 foot times gives real world traffic light acceleration measurements, not seat of the pance feeling, also a lot of modifications come with sacrafices sometimes in drivabilty.

[jwanck11]

Yesterday I pulled the boat without the system and today I pulled it with the CAI installed. There was a noticeable difference. Without the boat, the truck is definitely more jumpy off the line, but I did not notice much difference otherwise.

[Nobody]

i answered you in the PW, and yes stainless means no rust

Stainless DOES rust.

[91Terminator]

So what was the final evaluation?

Any difference?

What did you finally do? And How did you test it?