um.....
11-11-2008, 03:28 PM
#11
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Join Date: Feb 2008
Location: Abilene, Texas
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You heard wrong. Totally wrong. In order for an engine to gulp more cool air, you installed a cold air box. This is good. However, an engine is nothing more than a large air pump. In order for the air to come in, it has to get out. You really need a better exhaust to take advantage of the air cleaner setup you installed.
The other poster has me confused with his 4.6. He installed an exhaust, a K&N air cleaner (did not specify if it was just a filter or the cold air box). Nor did he specify the size of his exhaust. Using too large of an exhaust pipe will hurt the small block performance; a little back pressure is good. You want clean, mandral bent tubes to allow the exhaust to flow. I suspect his tuner is too aggressive, but I cannot render an opinion without knowing his details.
The other poster has me confused with his 4.6. He installed an exhaust, a K&N air cleaner (did not specify if it was just a filter or the cold air box). Nor did he specify the size of his exhaust. Using too large of an exhaust pipe will hurt the small block performance; a little back pressure is good. You want clean, mandral bent tubes to allow the exhaust to flow. I suspect his tuner is too aggressive, but I cannot render an opinion without knowing his details.
11-11-2008, 03:33 PM
#12
Moderator (Ret.)
i just have the filter, not the whole intake, i have a flowmaster muffler with a dual rear exit- 3.5'' tips on 2'' exhaust. when i got the truck it already had the k&n filter but i added the exhaust which only changed my lower end torque to the higher end rpm's. the tuner that everyone swears by did pick it up a little but nothing like what everyone else says, not sure what the reason is behind all of this??
I'm still not convinced the tuner is set correctly, but I have no experience in the tuner you're using, so I'll stay out of that.
11-11-2008, 03:58 PM
#14
Sparky
Join Date: Oct 2008
Location: SoTN
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when i floor it there seems to be a lag kinda before it starts to take off.. and when i get to about to 45-50 mph it seems to kinda slow down the acceleration even though i have it floored..
11-12-2008, 11:17 AM
#15
Notorious Thread Editor
i just have the filter, not the whole intake, i have a flowmaster muffler with a dual rear exit- 3.5'' tips on 2'' exhaust. when i got the truck it already had the k&n filter but i added the exhaust which only changed my lower end torque to the higher end rpm's. the tuner that everyone swears by did pick it up a little but nothing like what everyone else says, not sure what the reason is behind all of this??
Having said that...you can see from my sig that my truck is heavy and it is still as monster. I almost break loose the tires between shifts at 45-50. I love driving my truck even more now than before. I am getting ready to do some serious off roading to get to a good fishing spot on friday so I will test out the towing tune cause I assume the low end will be very helpful.
