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Vmax Throttle Body Installation For Begineers

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7.7K views 12 replies 6 participants last post by  2016Machine  
#1 · (Edited)
My son bought me a Vmax ported LS3 throttle body for Christmas. (The boy is definitely a keeper!) In my infinite wisdom I decided that I could do the install myself.

First thing you need to know is that I am most definitely not a mechanic. I have never changed the oil or done a brake job on any of my vehicles. If it counts, once I changed the battery in my Harley.

Anyway first thing I did was check You Tube for installation videos. (How did anyone work on anything before You Tube?) Anyway this was the best / closest video I could find. Don't pay too much attention to his dyno numbers. I think the more engine mods you have the less difference a ported throttle body makes.


Yeah I know it is for a Camaro, but I figured one 2016 LS3 is pretty much like another. The only thing that really off is that I think he has a CAI installed. That means that the air piping was slight different.

Tools needed;
7 mm socket for the intake air tube
10 mm socket for the throttle body itself
1/4" socket (I think a 3/8" socket may encourage over tightening)

Procedure

1) Loosen, but do not remove band clamps on air intake tubing at front of throttle body and exit of the air cleaner casing.
2) Remove engine cover. Lift up from front end and then back.
3) Slide air tubing apart at both locations and bend entire assembly up about 120 degrees. This will get it mostly out of the way.
4) Carefully remove electrical connection plug on left side of throttle body. Clip is located on the front of the connector.
5) Loosen and remove 4 each 10 mm bolts holding throttle body in place.
6) Remove throttle body.

Installation is exactly back wards from the removal.

The entire job takes about 15 minutes or 1 maybe 2 beers.

My car started up flawlessly and immediately settled down to a smooth 750 rpm idle with a small lope. No problems no fault codes.

I took the car out for a spirited test ride afterward. My butt dyno says maybe the car pulls a little harder. Not a night a day kind thing, but I don't think I was imagining it. I will say that in my opinion the 2016 has felt a bit quicker than the 2014 did.

I took some side by side pics of the 2 throttle bodies. I must say that for some reason I always thought that step in the OEM unit was more pronounced. The Vmax is definitely more streamlined and smoother, but the difference was just not as great as I expected.

Have a look for yourselves. The Vmax is on the right.



 
#2 ·
super easy mod and throttle response does feel nicer.
 
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#6 ·
#7 · (Edited)
nice
 
#9 ·
Got my VMAX headed this way! WOOT WOOT!
 
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#10 ·
.......This definitely isn't improving HP/TQ however.....
Maybe......maybe not. But as a voice of authority, if you haven't done the back-to-back tests your (mere) words won't gain much traction, here.

That having been said, the V-max does improve throttle response. That alone makes it worth the price.

KW
 
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#11 ·
Fair enough. But I can easily come up with some "tricks" that will show a difference on these back to back runs. What was ACT for each run? ECT? Fuel the same? Fuel temperature?

Classic trick these companies do is to perform the "before" test with a warm engine that would have hotter ACTs. Cold soak the car for 8 hours, install part, perform dyno run with cold ACT. You'll get a degree or two more of spark at peak power, boom theres 10HP from insertpartnamehere.

I work in powertrain development by day, so I have to say that I know the difference between a carefully designed experiment that takes care to avoid noise factors, and an experiment that purposely exploits noise factors to deliver a desired result. Just wanted to remind people to take 30 seconds to ask themselves if a certain upgrade gave an easy 10 horsepower, why wouldn't the GM Powertrain engineers in Pontiac done that themselves? Do you really think they are that naive? Anyways, just my $0.02. I would prefer to save people money on things that actually made a difference. Clearly I've offended, so I digress, carry on.


I dont think you've offended anyone. In my 2010 Camaro SS when i just had the heads cam and boltons I did notice a positive change with the throttle body from vmax (did the stroker kit later ). The throttle came on much quicker and smoother. So i did it on my 2013 Camaro SS which just had boltons and I noticed a positive change as well. That time i felt like it helped it get on its feet easier and I just ordered one for my 16 SS. I would say it probably doesn't make more "power" but I do feel like it helps open up responsiveness which is quite noticeable and feels great. Just my .02 with the LS3. I've had years of experience with this motor in all formats.
 
#12 ·
With respect though, having a more aggressive throttle map can be accomplished with a tune - so although it may feel snappier, you haven't really gained much power. Plus a good dyno tune will actually give you a measurable horsepower bump.
 
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#13 ·
Tunes definitely make the most difference. CAI, TB, Catback, intake manifold etc are all nominal gains without a tune. Some are afraid to play the big boy game and void warranty tho. Which i can understand. Gotta pay to play.