Exhaust and low end power loss

blackbok · 02-19-2005, 03:25 PM

A while back I had a local muffler shop weld on a MAgnaflow muffler (single). I THINK it is a 3" pipe coming off that. I that too big? Only reason I ask is I feel like I am really lacking in low end torque. Would a smaller pipe help? When I step on the throttle, ther is just lag there. I want response!
Also, the sound is OK, but I was hoping for something a little deeper. Gurgly even. Just mean. Not loud, just mean. Any suggestions on what to do?

nineball481 · 02-19-2005, 04:12 PM

you might want to do a search on this forum regarding torque management. That is probably the culprit to the lack of low end response. The 3" pipe should be fine. As for the sound, I'm not sure what you could do to get the desired effect without replacing the muffler. I know that if you install a cold air intake the sound will change (I think for the better) but it is not a deep gurgle sound. It's more of a whistle from the added suction.

kenny-1907 · 02-20-2005, 02:14 PM

Quote:

Originally Posted by blackbok

A while back I had a local muffler shop weld on a MAgnaflow muffler (single). I THINK it is a 3" pipe coming off that. I that too big? Only reason I ask is I feel like I am really lacking in low end torque. Would a smaller pipe help? When I step on the throttle, ther is just lag there. I want response!
Also, the sound is OK, but I was hoping for something a little deeper. Gurgly even. Just mean. Not loud, just mean. Any suggestions on what to do?

I had the same problem with my Silverado when i had a true dual system installed (seperate pipes from manifolds to the mufflers and oth the rear). I complained to the muffler shop and they tried a thing or two , even changed the mufflers to an almost free flowing muffler (flo pro) with little change. The more i drove the truck the more it got it's power back. Right after it was done , off the line was not too bad but around 30 km/h if you stepped on it , it just seemed to be bagged. Now after about 7 months , off the line it will smoke them , and around 30 km/h when you open it up it just plain hauls ass. I say drive it for a while before you go wasting money on changing the muffler , for one it will change sound after a while and two, most likely the power loss will come back after your trucks computer has made the necessary changes to the added ability to exhale. I agree with nineball , either mod your existing air intake (www.sshotrods.com) and change out the air filter for a k&n or get a complete cold ait intake kit. From your description all you did was add in one muffler not two, so there should not be that much of a decrease in back pressure to cause a problem, so like i said drive it for a few weeks and see if it improves first. Mine defnietly did.

blackbok · 02-20-2005, 06:00 PM

Quote:

Originally Posted by kenny-1907

I had the same problem with my Silverado when i had a true dual system installed (seperate pipes from manifolds to the mufflers and oth the rear). I complained to the muffler shop and they tried a thing or two , even changed the mufflers to an almost free flowing muffler (flo pro) with little change. The more i drove the truck the more it got it's power back. Right after it was done , off the line was not too bad but around 30 km/h if you stepped on it , it just seemed to be bagged. Now after about 7 months , off the line it will smoke them , and around 30 km/h when you open it up it just plain hauls ass. I say drive it for a while before you go wasting money on changing the muffler , for one it will change sound after a while and two, most likely the power loss will come back after your trucks computer has made the necessary changes to the added ability to exhale. I agree with nineball , either mod your existing air intake (www.sshotrods.com) and change out the air filter for a k&n or get a complete cold ait intake kit. From your description all you did was add in one muffler not two, so there should not be that much of a decrease in back pressure to cause a problem, so like i said drive it for a few weeks and see if it improves first. Mine defnietly did.

I had an Airaid on, full unit with the MIT. I recently took off the filter and went with a K&N panel and kept the MIT. So, on a side note, the Airaid is up on Ebay if anyone is interested http://cgi.ebay.com/ebaymotors/ws/eB...%3ALC%3AMT%3A1

I think I will just let it be for a while. See if the computer doesn't re-learn. I do experience the 30 mph step on it bog. Sucks on the freeway when trying to pass.

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