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  #1  
Old 02-08-2010, 02:46 PM
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Boost psi

Is it normal when my boost 1-4 gear is 27-30 psi range then when it shifts to 5th it drops down to about 20 psi ? I have a sct running spartans aggressive street
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Old 02-08-2010, 03:24 PM
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My boost has never been over 20psi. I run Matt's (GearheadAutpPerf) SRL and never see more than 10psi during normal (55-65mph) driving.
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Old 02-08-2010, 03:28 PM
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Quote:
Originally Posted by MoyockPowerstroke View Post
My boost has never been over 20psi. I run Matt's (GearheadAutpPerf) SRL and never see more than 10psi during normal (55-65mph) driving.
Ever? Stock, mine will hit 30psi.
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Old 02-08-2010, 03:37 PM
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Quote:
Originally Posted by mdub707 View Post
Ever? Stock, mine will hit 30psi.
That's right...before the SCT tunes and even now...I've never seen more than 20psi. Like I said, my normal range is 5-7 and up to 10 for normal driving...I haven't towed yet with Matt's TowPig. Maybe something is wrong with my CAC tube boots or Turbo??? Is it supposed to be high?
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Old 02-08-2010, 03:47 PM
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Um, I dont know.
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Old 02-08-2010, 04:00 PM
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Like mentioned before, stock my truck will hit 25lbs(maybe 28 on a highway pull). With my extreme street at highway speeds I am between 10-20lbs. It will peg my gauge at 35 pulling a hill.
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Old 02-08-2010, 04:59 PM
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mines the same as moyock.....mine never exceeds 20 even a run with it on the floor
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Old 02-08-2010, 05:04 PM
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I hit 32 with my race tune and it drops to 20 in 5th, if I am cruising 70 it can drop down between 2-3 then when you hit it it spools back up to 32.
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Old 02-08-2010, 05:37 PM
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Well under WOT on my race tunes I'm about 20psi. However if I lug it and keep it in one gear it will go up and peg my 35psi gauge. I've hit 31 a couple times with my truck on stock tuning, unloaded, going up a slight hill.

You should be seeing over 20psi on stock tuning, never heard of one below that with stock setup.
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Old 02-08-2010, 06:01 PM
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i think 25 psi is what most stock trucks make. thats what my tech said. i also hit 32psi with race tune
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