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Building a 5.2 for boost

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Old Apr 10, 2012 | 06:01 PM
  #11  
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Can you say: "In the weeds."??

That's SHARP. What color is that?
 
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Old Apr 10, 2012 | 06:02 PM
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Blue
 
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Old Apr 10, 2012 | 06:14 PM
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Thats factory Intense blue just re-sprayed with some tender loving care. Its going to be 3 1/2 inches lower. Its in the process right now.

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Old Apr 10, 2012 | 06:17 PM
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Originally Posted by 2x1972
Blue
LOLOLOLOLOL.

Thank you captain obvious..... Oh, wait, that's a different member....

Originally Posted by SvrdRam
Thats factory Intense blue just re-sprayed with some tender loving care. Its going to be 3 1/2 inches lower. Its in the process right now.
Wow, intense is correct. Looks REALLY sharp. I like it.

Can you GET 3 1/2 inches lower without dragging the frame on the ground???
 
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Old Apr 10, 2012 | 06:27 PM
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Frames already there, currently taking 4 inches out of the top side of the frame snd going to gusset and box it in, cut out and raise the trans tunnel and lower the body over the frame so when the suspension is aired out the rockers are on the ground.
 
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Old Apr 10, 2012 | 06:36 PM
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Originally Posted by SvrdRam
I'm extremely familiar with playing with boost, I current have a 91lx with a 408w that wears a pair of 6768s that makes alittle over 1200hp at the wheels on e85.

But what I don't is what these motors can handle (stock 5.0 splits at 14psi and 566hp ;-)) thats why I figured I'd throw the best pistons money can buy and a decent set of rods but its the crank and block I was concerned with. Only looking for mid 300hp at the wheel to back up its looks.
Mid 300 isn't a problem, the stock long block will laugh at it. That 500whp 5.2 is the highest 5.2 I know of but the stock 5.9 short block has been pushed into the 600-700WHP range by a few people and I'm betting the 5.2 isn't much different.
 
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Old Apr 10, 2012 | 06:40 PM
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At what point does the factory fuel injection become useless? I already have full -6 lines, fuel rails and correct pump. Don't want to go stand alone if I don't have to.
 
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Old Apr 10, 2012 | 06:49 PM
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I wonder if you can just install bigger injectors, and get a program for a 3 bar map..... might wanna have a chat with Hemifever, and see what he has to say.
 
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Old Apr 10, 2012 | 06:56 PM
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I'd like to try to get as much power out of this is a can but don't want to get crazy, obviously its not a race truck.
 
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Old Apr 10, 2012 | 11:58 PM
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Originally Posted by SvrdRam
At what point does the factory fuel injection become useless? I already have full -6 lines, fuel rails and correct pump. Don't want to go stand alone if I don't have to.
IMO it's useless with any boost, it was never disigned to be boost aware. This doesn't stop people from doing it.
Originally Posted by HeyYou
I wonder if you can just install bigger injectors, and get a program for a 3 bar map..... might wanna have a chat with Hemifever, and see what he has to say.
The MAP resolution already sucks with a 2BAR map, 3 would be totally untuneable.


Basically the problem is there is an open loop time delay, so you punch and it's gonna be lean for a second until the delay is up and it kicks into open loop. The "solution" is to force open loop all the time but that sucks IMO and usually the AFRs like to do whatever they want when out of boost (or so it seems hearing others talk about their boost tunes). I've seen enough poorly tuned boosted magnum stuff online tuned by Hemifever that there's no way I'd tolerate it.

My simple MSD BTM and fuel only Megasquirt install works really well and was stupid simple to wire up, but it's not as good as having full timing control (which Megasquirt can do, with stock cam/crank sensors).
 
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