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Old 09-01-2015, 10:36 PM   #1
onebad1le
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15lbs of boost on stock ls3

well currently running 12.9 lbs of boost with 2.55 pulley on LSA
changing too 2.38 pulley and 15 lbs of boost
the diff from 2.85 too 2.55 was a big diff aka ---(hellcat beater)
hope theres the same diff from 2.55 to 2.38 will post results later
and hope my stock block can take it

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Old 09-01-2015, 11:07 PM   #2
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How are you making 13lbs with a 2.55? I'm seeing 10.5 up top with a 2.50?

Either way, should be badass man!
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Old 09-01-2015, 11:19 PM   #3
onebad1le
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boost

my set up might be different then yours
I have ls9 cam no overlap ,bigger cam makes less boost
also heads and snout ported
what your set up? I rather have 10 lbs of boost and more power
when i upgrade to BTR stage 3, I think i will loose boost but
gain power.
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Old 09-01-2015, 11:27 PM   #4
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Gmpp ported ls3s with ls9 gaskets net me 10.9:1 compession, 2 inch headers, untouched blower, and btr stage 3 pd cam.

The difference in our cams explains it
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Old 09-01-2015, 11:31 PM   #5
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Did u ever have another cam in ? how much power did u gain with BTR 3 ?
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Old 09-02-2015, 01:26 AM   #6
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Quote:
Originally Posted by onebad1le View Post
Did u ever have another cam in ? how much power did u gain with BTR 3 ?
Ive had 2 others in the car but not with the lsa blower.

I gained 213whp with the blower and cam swap though.
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Old 09-02-2015, 03:09 AM   #7
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another factor is elevation. Houston is about 45' above sea level, whereas Findlay, OH is almost 800'. The BTR cam has negligible overlap (1/2*), so I wouldn't think that it would make a big impact on boost pressure.
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Old 09-02-2015, 03:42 AM   #8
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another factor is elevation. Houston is about 45' above sea level, whereas Findlay, OH is almost 800'. The BTR cam has negligible overlap (1/2*), so I wouldn't think that it would make a big impact on boost pressure.
Ah, didn't think about elevation
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Old 09-02-2015, 08:16 AM   #9
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It not just over lap. - its the duration the valves are open
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Old 09-02-2015, 10:32 AM   #10
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ran mine last fri at RPR and my 16psi is holding just fine. Good luck
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Old 09-02-2015, 11:49 AM   #11
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I've been running this pump gas/meth tune for 9 months with no problems. I've got a smaller pulley for my race gas set up. The cylinder heads have never been off.
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Old 09-02-2015, 12:20 PM   #12
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I'm running zl1 pump and 1000cc injectors
When I install pulley will see when I run out of pump
What fuel system u running
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Old 09-02-2015, 01:44 PM   #13
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Quote:
Originally Posted by D3R3K View Post
I've been running this pump gas/meth tune for 9 months with no problems. I've got a smaller pulley for my race gas set up. The cylinder heads have never been off.
That makes me want to crank mine to the max.
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Old 09-02-2015, 06:07 PM   #14
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The real issue is past 20 pounds of boost, from what I hear from respected shop owners and engine builders, that's when you risk pushing water. You'll never get to 20 psi on a non forged bottom end, but the point is pay more attention to your whp than your boost.
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