5.7 Vortec Performance...... Restrictor Plate? - Chevrolet Forum - Chevy Enthusiasts Forums

5.7 Vortec Performance...... Restrictor Plate?


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Join Date: Feb 2006
Posts: 16
Ottawa, Ontario

September 20th, 2006, 3:17 AM   #1  
5.7 Vortec Performance...... Restrictor Plate?

Hey guys, I'v been searching around for ways to increase the performance of my Tahoe and someone mentioned that the 5.7 Vortecs where equiped with a throttle body restrictor plate.... Anyone have any ideas on this? or how to remove it?

Also is there any air silencers ect that can be removed to increase performance and sound? I'm looking for anything quick and easy before I start getting into the more complex things. Unfortunately I'm stuck in underground parking so it makes things interested I was thinking of custom building a ram-air system for it, I already have installed a K&N filter in the stock box.


I'm open to ideas, and if anyone in Ontario Canada is selling a nice set of rims please let me know

 
Join Date: Aug 2006
Posts: 2,424

September 20th, 2006, 1:33 PM   #2  
RE: 5.7 Vortec Performance...... Restrictor Plate?

The restrictor plate is easy to remove and is positioned just behind the throttle wottle accumulator.
The silencer is a little trickier to get at and remove (but well worth the effort), it is a black box attached to the front of the headlight fluid reservoir.
These two mods will increase your power at least 50HP so hold on to your hat.



 
Join Date: Sep 2006
Posts: 75

September 21st, 2006, 12:41 AM   #3  
RE: 5.7 Vortec Performance...... Restrictor Plate?

ZX the fluid is low in my headlight reervoir, do you know where I can get some cheap? Oh, and my wottle is loose.

 
Join Date: Feb 2006
Posts: 16
Ottawa, Ontario

September 22nd, 2006, 3:02 AM   #4  
RE: 5.7 Vortec Performance...... Restrictor Plate?

I think you two need to check the O-Rings on your fluttinator valves, because you are obviously suffering for a dripping headlight reservoir due to rectal crainial inversion.


Anyone have a serious answer to this?

After listending to those two I completely understand why the ford guys stereotype most chev drivers as ******. Why would you waste your time typing crap out like that rather than attempting to be serious and help someone out?

 
Join Date: Aug 2006
Posts: 2,424

September 22nd, 2006, 4:18 PM   #5  
RE: 5.7 Vortec Performance...... Restrictor Plate?

There is no "serious answer to this" that's the whole problem.

Hey there NASCAR fan, you're the one asking about how to remove a fictitious "restrictor plate" not us, and most of us “Chev drivers” probably don't care all that much about what the "Ford guys" are saying anyhow.

 
Join Date: Feb 2006
Posts: 16
Ottawa, Ontario

September 22nd, 2006, 8:17 PM   #6  
RE: 5.7 Vortec Performance...... Restrictor Plate?

Ok well let me re-word this then, The butterfly in the throttle body apparently is restricted in its motion, not alowing it to open all the way causing a slight retriction in airflow into the intake manifold. I have seen TB's available on the market claiming to have had this issue resolved and I was looking to see if I could easily do this on my own without trashing my TB. I'll look later on to see if I can post the link to the site selling said TB's.

I can honestly say I'v never really watched nascar

 
Join Date: Feb 2006
Posts: 16
Ottawa, Ontario

September 24th, 2006, 5:31 PM   #7  
RE: 5.7 Vortec Performance...... Restrictor Plate?

The Link

http://www.cfm-tech.com/chevy-vortec.htm

 
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Join Date: Apr 2006
Posts: 9,107
KC, MO area

September 25th, 2006, 2:04 AM   #8  
RE: 5.7 Vortec Performance...... Restrictor Plate?

Interesting but notable is their failure to document any hp gains. At least K&N gives a specific gain at a RPM. Of course that it is at redline where it does very little good goes unnoticed. Also remember that getting more air in only helps if the cam and exhaust allow it to get thru. Just a thought.

 
Join Date: Sep 2006
Posts: 19

September 25th, 2006, 2:51 PM   #9  
RE: 5.7 Vortec Performance...... Restrictor Plate?

Has anyone done this. It sounds easy, but I'm concerend over computer errors that might occur. More detailed instructions too if available.

Thanks!!

 
Join Date: Aug 2006
Posts: 2,424

September 25th, 2006, 3:54 PM   #10  
RE: 5.7 Vortec Performance...... Restrictor Plate?

Save your money, this modified throttle body won't do anything other than lighten your wallet by $50 smacks.
The bottleneck in the intake track is not at the throttle body on these motors.

 
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