running straight pipe
#11
09-19-2007, 12:29 PM
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09-19-2007, 02:14 PM
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09-19-2007, 02:26 PM
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09-19-2007, 07:17 PM
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#15
09-19-2007, 07:18 PM
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RE: running straight pipe
ORIGINAL: bigmike
I do have a complete 4" straight pipe on mine and i will say that when i towed 12k+ on a 6 hour round trip i could still start off in second gear with no problems and i seemed to have plenty of torque at my disposal. Just my experience - hope it helps.
I do have a complete 4" straight pipe on mine and i will say that when i towed 12k+ on a 6 hour round trip i could still start off in second gear with no problems and i seemed to have plenty of torque at my disposal. Just my experience - hope it helps.
#17
09-20-2007, 01:54 PM
RE: running straight pipe
Steve, i really didn't notice any difference when not towing. I can still idle off in second and take off from a dead stop in third easily, and i feel like i have as much low end grunt as ever. I wonder of the exhaust/tranny combination is the real question here.
#18
09-20-2007, 05:44 PM
RE: running straight pipe
lets see here. . .the NV5600 2nd gear is 3.38, with 4.10's that comes to a 13.9:1 ratio, 3rd is 2.04 so that is still a good 8.4:1 final drive. the G56's 2nd gear is a 3.48, so even with 3.73's that comes to 12.98:1 and 3rd is geared at 2.1, 7.83 final drive. . .the 48RE's 1st gear is 2.45, and with your 3.73's your looking at a 9.13:1 final drive. this is not taking into account tire size differences.
another thing to look at is you have more paracidic loss with the auto as opposed to the stick
another thing to look at is you have more paracidic loss with the auto as opposed to the stick
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09-20-2007, 05:49 PM
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09-20-2007, 06:37 PM
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RE: running straight pipe
I agree with Steve. The 5" system(5" within 2" of the turbo elbow) no cat, flow thru muffler, hurt spool up and throttle response. Mileage seemed to be a bit better. EGT's 100 degrees lower across the board, with MUCH faster cool down times. The picture shows the downtube connected to the turbo elbow.
[IMG]local://upfiles/28306/29D3D4E6CAC64BDB9409CEC2E46F0764.jpg[/IMG]
ORIGINAL: steve05ram360
I have the opposite to say here... not to argue but to give a different opinion based on my experince with my truck, an '05. I removed my cat & put in a 30" magnaflow straight thru muffler and lost alot of part throttlelow end torque. mileage went down and I wasnt very happy with the setup. I then added a 4040 aero muffler where the cat used to be and it's design provided enough backpressure (IMO) to help spool the turbo quicker and bring back the low end torque lost w/o it.egt's were still reasonable and better than stock. if your looking for quick 0-60 times or 1/4 mile times and dont tow, sure straight pipe it and you'll be on your way. for towing, I think you need some restriction in there to get you off the line better and the 4040 where the cat was will help with that. it is a compromise between straight thru and not so straight thru. go to the aeroturbine website and have a look at their mufflers and you'll see what I mean.
I have the opposite to say here... not to argue but to give a different opinion based on my experince with my truck, an '05. I removed my cat & put in a 30" magnaflow straight thru muffler and lost alot of part throttlelow end torque. mileage went down and I wasnt very happy with the setup. I then added a 4040 aero muffler where the cat used to be and it's design provided enough backpressure (IMO) to help spool the turbo quicker and bring back the low end torque lost w/o it.egt's were still reasonable and better than stock. if your looking for quick 0-60 times or 1/4 mile times and dont tow, sure straight pipe it and you'll be on your way. for towing, I think you need some restriction in there to get you off the line better and the 4040 where the cat was will help with that. it is a compromise between straight thru and not so straight thru. go to the aeroturbine website and have a look at their mufflers and you'll see what I mean.