Best way to port plenum?
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Junior Member
Joined: Jan 2003
Posts: 57
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From: Chicago
Car: 1990 Iroc
Engine: L98 5.7 350
Transmission: 700r4
Best way to port plenum?
I want to port my plenum on my L98, will any engine rebuilding shop do it? Or do you have to send it in? Doing it myself is not an option with no tools and little experience. How much would it cost to do at a shop?
Supreme Member
Joined: Jan 2002
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From: Las Vegas, NV
Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
TPIS will do a very thorough clean job - if they didn't they would not be tuned port injection specialisties. 
I believe TPIS grinds down EGR shroud, and opens up runner entries - they do not siamese.
I believe TPIS grinds down EGR shroud, and opens up runner entries - they do not siamese.
Supreme Member
Joined: Nov 2001
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From: Ocean, NJ
Car: Check The Sig
Hell, Ill do it for you and I wont rip you off and leave you walking awkward after im done either. Do NOT send it to TPIS.
In all honesty, you can do it. It doesnt take a lot to do. A dremmel, a bit, and some free time. You would probably save money getting a seperate plenum and praciticing on that, and then to do it on your own plenum. They charge you like 100 bucks or so to do it. Honestly, Ill do it for you if you really want. Dont waste your time with TPIS.
In all honesty, you can do it. It doesnt take a lot to do. A dremmel, a bit, and some free time. You would probably save money getting a seperate plenum and praciticing on that, and then to do it on your own plenum. They charge you like 100 bucks or so to do it. Honestly, Ill do it for you if you really want. Dont waste your time with TPIS.
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Joined: Feb 2003
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From: Eastern Europe
Car: 98 T/A
Engine: ls1
Re: Best way to port plenum?
Originally posted by IROCZEKE
I want to port my plenum on my L98, will any engine rebuilding shop do it? Or do you have to send it in? Doing it myself is not an option with no tools and little experience. How much would it cost to do at a shop?
I want to port my plenum on my L98, will any engine rebuilding shop do it? Or do you have to send it in? Doing it myself is not an option with no tools and little experience. How much would it cost to do at a shop?
And I did it by myself seriously try borrowing a dremel and DO it, it's fun and you WILL be proud of yourself once you're done with it.
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