Kbuskill's 2008 Burb LTZ "MOD" Thread

[Fosscore]

Looking at Carven or Black Widow, they might be too small or loud for your application given your recent changes.

Although just for the name alone the BW ”Neighborhater” gets my vote. Lol

 

[kbuskill]

Looking at Carven or Black Widow, they might be too small or loud for your application given your recent changes.

Although just for the name alone the BW ”Neighborhater” gets my vote. Lol

That would have been an accurate description of it the other day after removing the cats.

I would have never guessed the cats would quieten it down that much.

 

[eand28]

I had the Gibson on my burb. Pretty quiet and didn’t really drone on the highway

 

[iamdub]

Great info and testing.

Do you feel as if you lost any top-end? I guess the real way to answer that would be to see what BB has to adjust. They would see a drop in CFM and vacuum at WOT at upper RPM. For that matter, they should be able to analyze any changes throughout the RPM to determine if any power was picked up in the low end. Calculating the changes in flow can create an estimated power curve chart to make comparing easier.

 

[08HoeCD]

Cool info on the shorty headers. I read different things about them relative to actual power gains, so being able to learn from your data would be huge.

In terms of taming the dB factor via muffler, I'd either find the stock muffler or go with the largest Magnaflow that will fit your setup. Let us know!

 

[Onebad1983]

That would have been an accurate description of it the other day after removing the cats.

I would have never guessed the cats would quieten it down that much.

Cats sometimes are more sound killing than an actual muffler

 

[kbuskill]

Great info and testing.

Do you feel as if you lost any top-end? I guess the real way to answer that would be to see what BB has to adjust. They would see a drop in CFM and vacuum at WOT at upper RPM. For that matter, they should be able to analyze any changes throughout the RPM to determine if any power was picked up in the low end. Calculating the changes in flow can create an estimated power curve chart to make comparing easier.

I haven't really taken her out and opened here up on the interstate but from what little bit I have had her on the big road I would definitely say NO.

I have to be more careful now it seems because if I'm not paying attention she will get away from me... I will look down and be 10-15 over the speed limit and not realize it. So she just seems to want to go more now.

I don't have a BB tune... it is a Diablew tune via a Diablo sport tuner.

I did ask him if there was a big difference from the last tune...

Me... "Just out of curiosity was there much of a difference from the last tune???
I'm just curious how much of a difference the headers and y pipe made."

Lew... "yeah I made a bunch of adjustments.. airflow, fueling, timing, WOT fueling, WOT timing, etc.."

So who knows... maybe he's being completely honest or maybe he's just blowing smoke to make me feel like I'm getting my money's worth... lol

 

[kbuskill]

Cool info on the shorty headers. I read different things about them relative to actual power gains, so being able to learn from your data would be huge.

In terms of taming the dB factor via muffler, I'd either find the stock muffler or go with the largest Magnaflow that will fit your setup. Let us know!

To be honest I didn't notice a big difference when I first got the headers on and after removing the cats I felt like I lost some bottom end. It wasn't until I had the new 2.25" Y-pipe built that it made a big difference.

I don't know how much to attribute to the headers and how much to attribute to the Y-pipe BUT the combo is a winner.

I have been looking at a chambered and baffled Gibson that is 24" long and a Magnaflow XL 3 chamber muffler that is 34" long.

I'm thinking the longer the better to keep the sound level decent.

 

[kbuskill]

Cats sometimes are more sound killing than an actual muffler

I can attest to that... I found out the hard way... lol

 

[Onebad1983]

I can attest to that... I found out the hard way... lol

I can too and I still have cats. One of my friends has a 3.7 mustang with NO EXHAUST whatsoever