Porting TB and intake manifold
This is a discussion on Porting TB and intake manifold within the GTO forums, part of the Vehicle Specific category; From what im reading this seems to be very beneficial. Can this be tackled without an extensive knowledge of gearhead ...
06-08-2012, 05:21 AM #1
Porting TB and intake manifold
From what im reading this seems to be very beneficial. Can this be tackled without an extensive knowledge of gearhead skills? And are there any cons to doing this?
06-08-2012, 05:29 AM #2
Con: You could accidently render the TB useless, for nearly ZERO gain.
06-08-2012, 05:36 AM #3
that would be shitty... how can i avoid that?
06-08-2012, 05:45 AM #4
The idea is to make the area ahead of the ventury bore very smooth, not to remove a ton of material trying to make it larger.
Rather making the area @ the entrance and exit nice and smooth.
You won't see large gains, but anytime you make an engine breath a little easier it's a good thing.
This mod will give you a slight efficiency gain. Also good..
06-08-2012, 05:52 AM #5
con: this mod will prolly not register on the butt dyno..
Pro: could be a fun small project.
06-08-2012, 05:52 AM #6
would get this done at a machine shop be more expedient? i think i have a little spare cash...
06-08-2012, 05:59 AM #7
I've posted these pics here before. But you're still kinda new so here's a few of one I did.
This is for a totally different engine but the principles don't change from one engine to the next.
06-08-2012, 06:00 AM #8
06-08-2012, 06:03 AM #9
thank you for your wisdom. your project looks very sharp.
06-08-2012, 06:12 AM #10
06-08-2012, 03:02 PM #11
- Join Date
- Jan 2009
- Paterson/Ridgewood, NJ
Phantom Black Metallic
- 2004 GTO M6
I'm debating on whether or not to do this as well.
06-09-2012, 08:17 AM #12
looks like a pretty straight forward mod that has the potential to be extremely beneficial.
06-09-2012, 04:51 PM #13
Just remember to mark the "butterfly",, "FRONT, TOP" so it gets replaced the same dirrection it came out.
The leading edges of the ventury valve, (top and bottom only) or "butterfly" are angled for the dirrection in which it opens and closes.
This gives the ventury valve a slight back angle and it should not be removed or damaged.
Changing this dimension could cause idle issues, stuck or throttle hang, etc...
When reenstalling the butterfly into the TB, be sure to inspect that it is indeed centered possitive to the ventury bore by back lighting the TB.
Once you are sure it is able to come completely closed,, then tighten the butterfly down, (don't go He-maning it)..
Open and close it @ least a number of times to ensure it's funtion is precise and not binding in anyway.
06-10-2012, 12:02 AM #14
I think i can tackle the throttle body on my own and outsource for the intake manifold. What tools and bits do you suggest for that project?
06-10-2012, 05:12 AM #15
But by hand, you'll need an electric or pneumatic moto tool with various, stones, and die grinders,
perferably cone and/or tear drop shaped.
Start slow and experinent with various tecniques till you find one that best works for you.
Take your time,,, SECURE YOUR WORK!,,, be deliberate in how you tool,,,
try not to get caught up working one spot too long.
Last edited by Smittro; 06-10-2012 at 05:17 AM.
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