4inch Downpipe & 4inch Aluminum Exhaust
English is a great shop and I know all the guys who work there. Great bunch.
Mar 19, 2012, 10:18 PM
#80
The 4" downpipe becomes needed on the larger mid frame stuff. According to FP my 3586 was corked with the 3 to 3.5 setup I had, and the 3794 was even worse off. This year its getting a 4" DP and the 3.5 catback with dumps will stay put.
As a sidenote, I found that even at 3.5" there is power that can be made or loss with something as simple as the muffler. I went from a 4" aero turbine to a Magnaflow 3.5 offset entry and was fine until 660whp (26psi) after that my numbers start to diverge. By 38psi I was down 50whp because of the muffler.
Backpressure is the enemy, if I knew how to run it negative I would.
Mar 20, 2012, 03:35 AM
#82
You might want to recalibrate your hand sales. Your not gonna drop 75lbs. As for the 4 inch Bs. When comparing it to the ****ty perrin exhsust you are replacing it with thst is already restrictive then yes your exhaust will make gains. So will a properly built 3 inch unit. The turbo you pictured I hope is jot what your planing to use. Looks like a 3.0 vband housing. So again I do not see you picking up any worth while gains over s lighter 3inch exhaust. I dont make hulk hogen power like you do but I believe I made enough to see any gains from my old 3.0 to 3.5 inch exhsust. I saw nothing. And if your under 900 i dont think you will either. Well from the perrin to the new one you will. But from a properly built 3.0 you wont and again if you do its minimal
Mar 20, 2012, 03:38 AM
#83
Some new results are in... Put the car on the dyno yesterday - https://www.evolutionm.net/forums/ev...gear-pull.html
Mar 20, 2012, 05:14 AM
#84
Mar 20, 2012, 05:17 AM
#85
Some new results are in... Put the car on the dyno yesterday - https://www.evolutionm.net/forums/ev...gear-pull.html
Mar 20, 2012, 06:12 AM
#86
Not an accurate back to back, the 3in was recirculated and the 3.5 wasn't. Even going to another 3in open dump would have showed gains, so I don't believe the marginal hp between the 3in and 3.5 would really be that big in a real back to back testing given that both are open dump.
Last year I made similar power to what I'm making now, but in 4th gear, with more boost. This year w/4inch exhaust we made the same power in 3rd gear (which usually shows a lower number), at less boost, and we totally maxed out the fuel system of the car.
Mar 20, 2012, 07:37 AM
#87
migsu, I just basically did back to back testing... The difference is enormous, especially at higher power levels.
Last year I made similar power to what I'm making now, but in 4th gear, with more boost. This year w/4inch exhaust we made the same power in 3rd gear (which usually shows a lower number), at less boost, and we totally maxed out the fuel system of the car.
Last year I made similar power to what I'm making now, but in 4th gear, with more boost. This year w/4inch exhaust we made the same power in 3rd gear (which usually shows a lower number), at less boost, and we totally maxed out the fuel system of the car.
Mar 20, 2012, 09:26 AM
#88
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Beastly set up sir. Hopefully my car will be on the dyno soon. Im going to be running an Hta 3076 but I will be going bigger soon I'm sure. Collin at toxicfab is welding me a 3" titanium exhaust, 321 SS downpipe, all along with inconel bends. Hopefully ill have some good weight savings. Is your 3586 decent on the street?
Mar 20, 2012, 10:36 AM
#89
Beastly set up sir. Hopefully my car will be on the dyno soon. Im going to be running an Hta 3076 but I will be going bigger soon I'm sure. Collin at toxicfab is welding me a 3" titanium exhaust, 321 SS downpipe, all along with inconel bends. Hopefully ill have some good weight savings. Is your 3586 decent on the street?
