C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Porting the Plenum

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Old Oct 6, 2005 | 10:13 PM
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Default Porting the Plenum

I'm getting ready to port my plenum this weekend and I want to know if anyone out there has pix of theirs completed? I know there's something you need to completely cut off (I think it's where the TB is) but I'd rather see how it all looks before I go through with it!

If anyone has pix, I'd be very appreciative!

I was thinking about porting my runners, but I think I'm going to buy some High-Flow runners from SLP.

Thanx in advance!!

~Derek
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Old Oct 6, 2005 | 11:05 PM
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Send me your email address
vetteoz@optusnet.com.au
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Old Oct 6, 2005 | 11:30 PM
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Originally Posted by rodj
Send me your email address
vetteoz@optusnet.com.au

Done =)
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Old Oct 6, 2005 | 11:42 PM
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About the SLP runners...I used them and the stock ones are far more efficient.PM me if you need more details.I tried a bunch of stuff over the years and in the end went back to stock.Let me know if you need any info.


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Old Oct 6, 2005 | 11:50 PM
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http://www.gmtips.com/3rd-degree/dox...-port/port.htm
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Old Oct 6, 2005 | 11:52 PM
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*bows down*

Thanx =D

~Derek
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Old Oct 7, 2005 | 12:09 AM
  #7  
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What differences, good and bad did you notice with the SLP'd? Would you recommend them for say, a mild 383 or 406?
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Old Oct 7, 2005 | 12:35 AM
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I dont have pics but I removed the runner dividers totally wich is much easier than trying to grind them down from the inside.Also I have always thought about totally removing the area behind the Throttle Body so its just an open oval (the Superram,Miniram,Stealthram and Lt1 are open behind the Throttle Body.This could add to plenum volume a little maybe.
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Old Oct 7, 2005 | 01:48 AM
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Here's mine...

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Old Oct 7, 2005 | 03:15 AM
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Thats exacly what I did except yours look waaay better!What did you use to port those runners so smooth?By the way did you feel it was a worth while mod? I dont have access to a dyno but I felt a SOP improvment.

Last edited by montie98; Oct 7, 2005 at 03:21 AM.
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