new exhaust

dan68anderson · #1 Tue, August 4th, 2009, 07:46 PM

i just ordered a new cat-back exhaust, do my custom tunes need to be edited at all?

JWBFX4 · #2 Tue, August 4th, 2009, 09:14 PM

No as long as its from the cats back.

If you did anything like headers or hi flows or x/h pipes it would need to be.

***Jackpine*** · #3 Tue, August 4th, 2009, 10:59 PM

Quote:

Originally Posted by JWBFX4

No as long as its from the cats back.

If you did anything like headers or hi flows or x/h pipes it would need to be.

Dang! Everyone's trying to put me out of business!

Not much I can add to that.

- Jack

Corey Cohron RIP · #4 Tue, August 4th, 2009, 11:16 PM

LOL, Jack. I read it awhile ago, and it was a perfect answer -- nothing to add. I even read it to Billy and told him how great it is that we have so many members who are willing to jump in and help other members!

***88Racing*** · #5 Tue, August 4th, 2009, 11:18 PM

The only thing I will do is define what type of headers.
Shorty header-no tune adj
Long tube header-tune adj
Anything cat back is ok and will not need tune to be adjusted.
But do not exceed these pipe sizes

Si/so 3" max
Si/do 3" in 2.5" out

If you go bigger than these you will start to rob the motor of it's back pressure and you may lose low end torque.

Lars

dan68anderson · #6 Wed, August 5th, 2009, 05:14 PM

thanks for the responses!

dan68anderson · #7 Wed, August 5th, 2009, 05:21 PM

88Racing I had already ordered a Banks Monster Exhaust which has a 3" intermediate pipe and 3.5" tailpipe. It claims to cut backpressure up to 79% and increase flow up to 138%. Is this going to kill my low end torque?

By the way it is a SI/DO

***88Racing*** · #8 Wed, August 5th, 2009, 10:30 PM

Quote:

Originally Posted by dan68anderson

88Racing I had already ordered a Banks Monster Exhaust which has a 3" intermediate pipe and 3.5" tailpipe. It claims to cut backpressure up to 79% and increase flow up to 138%. Is this going to kill my low end torque?

By the way it is a SI/DO

If you guys reading this ever wonder why Banks stuff is so expensive it's because of their r&d on a product.
I went to the site and examined what you had ordered and it's a great product.
They did the exhaust design different than most others. The pipe y's after the muffler. So basically they are using the same muffler for the si/do and the si/so. Other companies use the muffler to split the exhaust.
It should make the truck sound great after breaking it in, in about 2 weeks.

Lars

dan68anderson · #9 Thu, August 6th, 2009, 04:37 PM

lars i just want to thank you for taking the time to research that for me! ill let you know how it sounds and performs