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Forced Induction Superchargers | Turbochargers | Intercoolers

05 colorado SBE 6.0/C480/4l80e 9.78@143 foot brake 3850lbs

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Old 12-14-2015, 05:37 AM
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Originally Posted by 98Camarod
Just curious, did you try blowing in the direction that the pump flows and have the same result?
Yeah, it could be an anti-drainback check valve. Either way you should not have fuel coming out of the top of the pump in a free flow condition.
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Old 12-14-2015, 09:03 AM
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Very interesting.
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Old 12-14-2015, 11:12 AM
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Awesome build!! I just started a turbo 5.3 Colorado build last week, hoping you could help me out... I accidentally dropped the tank and it ripped out the wiring in the two plugs on the sending unit.... I was hoping you could help me out with which color wire goes in which spot?

Thanks!
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Old 12-14-2015, 11:34 AM
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Originally Posted by Photochop
Interesting find! What does the stock return regulate the fuel pressure at? Are you planning on installing a boost referenced regulator in the future?
stock regulator runs 58psi, i dont plan to ever reference it, since 90% of fuel pumps loose flow at higher pressures, last 20 cars ive built have locked pressure

Originally Posted by 98Camarod
Just curious, did you try blowing in the direction that the pump flows and have the same result?
yep in either direction its a restriction, feels like im blowing into a coffee stirrer lol
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Old 12-14-2015, 11:44 AM
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So you just lock the fuel pressure at 58 and let the duty cycle fall wherever it may up in boost?
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Old 12-14-2015, 11:57 AM
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that roll on smoke show vid on the street =
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Old 12-14-2015, 01:48 PM
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Originally Posted by denmah
stock regulator runs 58psi, i dont plan to ever reference it, since 90% of fuel pumps loose flow at higher pressures, last 20 cars ive built have locked pressure
Originally Posted by 3 window
So you just lock the fuel pressure at 58 and let the duty cycle fall wherever it may up in boost?
That's cool, good to know. I was wondering the same thing about fuel injectors, these Siemens 80s you always use work fine and the fuel pumps stay happy at say 17psi boost?
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Old 12-14-2015, 01:57 PM
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What diameter is the exhaust on this beast, and is the WG routed into the exhaust, or atmo dump?
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Old 12-14-2015, 04:56 PM
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Matt is that an authentic 044 or a knockoff?
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Old 12-14-2015, 05:05 PM
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Originally Posted by 3 window
So you just lock the fuel pressure at 58 and let the duty cycle fall wherever it may up in boost?
Yes, but this will be limiting depending on injector size.

Bigger injectors with lower line pressure is always preferred, but gets expensive in a hurry if your making any real power.
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Old 12-14-2015, 05:36 PM
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Originally Posted by Photochop
That's cool, good to know. I was wondering the same thing about fuel injectors, these Siemens 80s you always use work fine and the fuel pumps stay happy at say 17psi boost?
yep 17-27psi whatever

Originally Posted by Tjabo
What diameter is the exhaust on this beast, and is the WG routed into the exhaust, or atmo dump?
3 inc tail pipe, wg dumped

Originally Posted by 69-chvl
Matt is that an authentic 044 or a knockoff?
its a 450 walbro not a 044
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Old 12-14-2015, 05:50 PM
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Originally Posted by denmah

its a 450 walbro not a 044
That's what I meant. Weird that the fuel seeps out of the pump like that. Maybe that how the pump bypasses fuel?????
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Old 12-14-2015, 05:57 PM
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Thanks Matt!
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Old 12-14-2015, 09:11 PM
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Great work on the Colorado! I'm sure it's going to **** a lot of posers off. Haha That is crazy the power it makes. Keep up the great work!
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Old 12-14-2015, 09:25 PM
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yes thats 700whp unlocked 80e, pumpgas, no methanol, in a 3500lb colorado...

05 colorado SBE 6.0/C480/4l80e 9.78@143 foot brake 3850lbs-cqxmlhg.png
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Old 12-14-2015, 09:25 PM
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Originally Posted by 69-chvl
That's what I meant. Weird that the fuel seeps out of the pump like that. Maybe that how the pump bypasses fuel?????
yes its an internal relief
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Old 12-14-2015, 09:45 PM
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How much boost did it take to get there?
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Old 12-14-2015, 10:11 PM
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Old 12-14-2015, 10:27 PM
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How much to toss this tune on a 0411?
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Old 12-14-2015, 10:34 PM
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Whole-E- ****
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