4" exhaust? will I feel a difference
07-19-2005, 12:26 AM
#1
4" exhaust? will I feel a difference
Be honest here please. I realize intake and exhaust are the basis for better breathing if needed and will greatly aid a bombed setup. But.... on a stocker will I feel and difference? Im not lookin for noise so that dont count.
Thanks.
Thanks.
07-19-2005, 04:15 AM
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Apache,
I put both my intake and exhaust on at the same time. For me there was a difference for sure. It felt so much smother and faster.
It won't be a big difference, but you will notice it. My MPG went up too.
I put both my intake and exhaust on at the same time. For me there was a difference for sure. It felt so much smother and faster.
It won't be a big difference, but you will notice it. My MPG went up too.
07-19-2005, 06:33 AM
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I had noticed my egt's running higher than normal so I bought a 4" MBRP system.
There was a big difference for me because my cat was plugged up.
Last week I straight piped it and it sounds awesome.
There was a big difference for me because my cat was plugged up.
Last week I straight piped it and it sounds awesome.
07-19-2005, 07:18 AM
#4
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You should not expect any hp improvements by just changing to 4" exhaust.....the real gain is egt reduction when running fueling levels above stock. Power gains come from increased fueling levels.
07-19-2005, 09:26 AM
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Re: 4" exhaust? will I feel a difference
Originally posted by apache
Be honest here please. I realize intake and exhaust are the basis for better breathing if needed and will greatly aid a bombed setup. But.... on a stocker will I feel and difference? Im not lookin for noise so that dont count.
Thanks.
Be honest here please. I realize intake and exhaust are the basis for better breathing if needed and will greatly aid a bombed setup. But.... on a stocker will I feel and difference? Im not lookin for noise so that dont count.
Thanks.
07-19-2005, 10:32 AM
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apache,
There are consistent HP gains of 8-12 HP with a well designed exhaust system, now that won't knock you in the back seat like a Edge Comp moduel will but most folks notice it after then install a system. If you add an intake it will also give it a little pep, especially the time it takes for the turbo to spool up, much faster.
If you plan any electronic or injector HP mods you need to consider exhaust and intake products. They allow the extra fuel to be burnt at a better rate, plus air is still free (until Uncle Sam figures a way around that) and the more air in a diesel the better. An engine is still nothing but an air pump, you add fuel to make it "POP", the more air that is available during the "POP" process the better the burn the more MPG and the higher HP while getting lower EGT's at the same time.
Mark @ DPPI
There are consistent HP gains of 8-12 HP with a well designed exhaust system, now that won't knock you in the back seat like a Edge Comp moduel will but most folks notice it after then install a system. If you add an intake it will also give it a little pep, especially the time it takes for the turbo to spool up, much faster.
If you plan any electronic or injector HP mods you need to consider exhaust and intake products. They allow the extra fuel to be burnt at a better rate, plus air is still free (until Uncle Sam figures a way around that) and the more air in a diesel the better. An engine is still nothing but an air pump, you add fuel to make it "POP", the more air that is available during the "POP" process the better the burn the more MPG and the higher HP while getting lower EGT's at the same time.
Mark @ DPPI
07-19-2005, 02:08 PM
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I didnt notice a diff when I went to 4" straight, but when I went to a diff intake it was night vs. day. I wont say it added much for power but seemed to run much smoother. Heck, I noticed the intake just starting the truck.
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07-19-2005, 02:52 PM
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Originally posted by Mark Craig
An engine is still nothing but an air pump, you add fuel to make it "POP", the more air that is available during the "POP" process the better the burn the more MPG and the higher HP while getting lower EGT's at the same time.
An engine is still nothing but an air pump, you add fuel to make it "POP", the more air that is available during the "POP" process the better the burn the more MPG and the higher HP while getting lower EGT's at the same time.
07-19-2005, 07:13 PM
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Before I replaced my exhaust it got to where I could only hit 26-27 psi of boost in 5th gear
when I used to top out at 32. Now it hits 32psi in a heartbeat. I looked at my cat and it was
pretty plugged up.
when I used to top out at 32. Now it hits 32psi in a heartbeat. I looked at my cat and it was
pretty plugged up.
