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4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

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Old 01-29-2012, 07:06 PM   #31
justinschmidt1
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Originally Posted by Kerns View Post
6k... On my dyno I was hitting 9.8lbs of boost at 5800rpm in 55* weather.
Ive heard that its normal for dyno's to read boost 2 psi~ high.

Either way, I would say to go with the 3.12 pulley.
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Old 01-29-2012, 07:58 PM   #32
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Ive heard that its normal for dyno's to read boost 2 psi~ high.

Either way, I would say to go with the 3.12 pulley.
My boost gauge also reads 9-10psi... Also, Soldier GT's car is cammed and he is hitting 8psi on a 3.33 pulley. 3.33 with an intercooler typically gets you 9-10psi unless you are cammed. Your car making such low boost on a 3.12 pulley is an anomaly.

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Old 01-29-2012, 08:47 PM   #33
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why does boost even really matter? just dont get super greedy with it and keep power to a reasonable level and have enough fuel and everyone will be happy
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Old 01-29-2012, 09:49 PM   #34
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My boost gauge also reads 9-10psi... Also, Soldier GT's car is cammed and he is hitting 8psi on a 3.33 pulley. 3.33 with an intercooler typically gets you 9-10psi unless you are cammed. Your car making such low boost on a 3.12 pulley is an anomaly.
the long tubes and basically straight through exhaust with the plenum/ 75mm tb could help flow a bit?

Idk, I guess I see more like 11 psi at 6k in the cold.

Depends on how far the OP wants to push it...but ive been running the 3.12 pulley for over 2 years with no problems.

Go big or go home
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Old 01-30-2012, 01:46 AM   #35
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the long tubes and basically straight through exhaust with the plenum/ 75mm tb could help flow a bit?
I'm running full exhaust (no cats) and accufab plenum/tb as well... So wouldn't be that
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Old 01-30-2012, 10:12 AM   #36
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I want 10psi at max, being that I'll be driving this only on nice days to work but still making it my main car to drive on my days off. Only time i wouldn't drive it would be on the rainy days and end of fall and winter time. I was referring to the vacuum line too Kerns.
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Old 01-30-2012, 10:52 AM   #37
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I'm running full exhaust (no cats) and accufab plenum/tb as well... So wouldn't be that


Hmm,

Idk, maybe im just high and my gauge reads low but my gauge has always shown 10-11 psi at 6k with my setup and I thought that was normal. lol
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Old 01-30-2012, 05:56 PM   #38
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Justin show us a video of your gauge, I think you're fulla sh*t! WOT @ 6k or I call B.S
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Old 01-30-2012, 07:29 PM   #39
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I want 10psi at max, being that I'll be driving this only on nice days to work but still making it my main car to drive on my days off. Only time i wouldn't drive it would be on the rainy days and end of fall and winter time. I was referring to the vacuum line too Kerns.
I just used a standard rubber fuel line from your local parts store. Just found out what size would fit on the fitting on the blow off valve and got a few feet of it.
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Old 01-30-2012, 10:09 PM   #40
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Justin show us a video of your gauge, I think you're fulla sh*t! WOT @ 6k or I call B.S


lol, I will do it just for you.
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