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01-19-2017, 09:52 PM
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#1 |
  
Drives: 2010 SS/RS M6 BIG cam Join Date: Mar 2016
Location: McDonald's DT
Posts: 857
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GMPP ported heads with PD blower
I've done quite a bit of searching and there is not much info on power gains with boosted ls3/l99 after GMPP ported heads installed
Anyone that has results to share it would be appreciated 
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BIG cam ...... 305 45 18 Mickys ...... BMR suspensions
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01-19-2017, 11:24 PM
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#2 |
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'It's an experiment'
Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014
Location: Dallas TX
Posts: 8,694
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I have the GPI ported heads with my LSA conversion. About 20 to 25 RWHP gain. The GMPP heads are a great deal IF you're pulling the heads anyway. Honestly, the stock heads are pretty good as they are so only do it if you are trying to get all possible hp. It you go turbo keep the stock ones...
-Don
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747 RWHP 794 RWTQ
"Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577 |
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01-20-2017, 09:50 AM
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#3 |
        Drives: 2006 Z06 Join Date: Oct 2010
Location: Gilbert, AZ
Posts: 5,712
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Heads flow more, which means less boost. If you turn the boost up to where it was before you will see gains. If you leave it were it was, you might not see any gains.
For example Stock heads 600rwhp at 9psi Ported heads 600rwhp at 7psi Same cylinder pressure, same power, less boost. Now if you pulley down to 9psi again you will make more power. Or just don't touch the heads and pulley down now.
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Nick
Corvette Z06 -1200ish rwhp |
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01-20-2017, 02:53 PM
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#4 |
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Drives: 2010 SS/RS M6 BIG cam Join Date: Mar 2016
Location: McDonald's DT
Posts: 857
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Alright thanks for the information guys , much appreciated
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BIG cam ...... 305 45 18 Mickys ...... BMR suspensions
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