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6 Lbs of boost is not enough

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Old Dec 24, 2007 | 01:29 PM
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Default 6 Lbs of boost is not enough

6 lbs just isn't quite enough for me. It just needs a little more. I guess it really is a big truck with a lot of weight and crappy gears.

Looks like I will be getting a bigger spring so I can get up to 10 lbs. Anything else I need to get besides a new tune?
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Old Dec 24, 2007 | 01:32 PM
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a transmission?



Fueling, including but not limited to injectors and pump.
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Old Dec 24, 2007 | 01:37 PM
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already got the 42 lb injectors. I think those will be good enough. Brian is sending me a 255 walbro...whole thread on that situation if you look. So that will be taken care of.

Trans I have the regular parts to upgrade...and I am ready to pull the trigger when needed for a level 5 flt.
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Old Dec 24, 2007 | 02:50 PM
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Originally Posted by dan96z71
...and I am ready to pull the trigger when needed for a level 5 flt.
Thats good

I have a Transgo HD2 kit installed along with aluminum accumulators and a Sonnax 2-4 servo upgrade. So far its holding up fine... but after the holidays the 4L80E is going in

Bill
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Old Dec 24, 2007 | 02:53 PM
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Originally Posted by dan96z71
already got the 42 lb injectors. I think those will be good enough. Brian is sending me a 255 walbro...whole thread on that situation if you look. So that will be taken care of.

Trans I have the regular parts to upgrade...and I am ready to pull the trigger when needed for a level 5 flt.
Do you have meth too? I think the 42's will be maxed at 10lbs. My 60's are at 62% with meth at only 9lbs boost.
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Old Dec 24, 2007 | 03:08 PM
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Don't be getting on that thing until you get the 255 in! My truck was going dead lean with the stock pump, and 6LBS. I have 60lb injectors though. Try 8psi. My truck was really strong down there with 8.There is a nice gain between 6 to 8psi. Do you have a AFR gauge on there? Mine was dead rich once I got the 255 in. I ended up turning the boost up to 10psi and the AFR was right on.
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Old Dec 24, 2007 | 03:11 PM
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My AFR gauge goes right to 10.9 at full throttle/boost. I don't have meth yet.
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Old Dec 24, 2007 | 03:13 PM
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Originally Posted by dan96z71
my AFR gauge goes right to 10.9 at full throttle/boost.
Thats about right then. Does it stay there the whole time you are wot?
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Old Dec 24, 2007 | 03:16 PM
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thats getting on the lean side of it would not let it get much lower. i had a sts kit with a 255 and 52lbs inj. makeing 10 psi and i was at 70%
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Old Dec 24, 2007 | 03:22 PM
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Goes right to 10.9 and stays there. I am getting the pump, no problems there..I will just pull the bed back off and do it when I get it.
I would think the 42 lb injectors are good for 10 lbs of boost.
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