View Poll Results: I have done the TB Bypass mod and
Seen or felt a performance gain
36
23.23%
NOT felt or seen any gain over non-TB Bypass setup
119
76.77%
Voters: 155. You may not vote on this poll
TB Bypass - anyone seen gains?
This is a very good thread. I think it's now beyond just a tb bypass and should have a renamed thread title and thrown into the lounge to see what everyone else has to offer 
i noticed that my TB cools off a lot quicker between runs. its a free, easy, and quick mod to do and it makes it easier to remove your TB should you ever have to, so i dont see a reason why you wouldn't do it.
I found all the parts I needed at carquest for 4 bucks. Vacuum caps are what I used to block of the T/B works nice. All the parts were on the "Help Me" rotating shelves. I felt significant gains doing the T/B bypass but at the same time I did that I also did the FTRA, Whisper Lid, and 160 degree thermostat. Just the mod on its own probably would help a little but as far that being the only thing done you probably will not feel a diffrence.
Nate
Nate
On The Tree
Joined: Jul 2005
Posts: 160
Likes: 0
From: New Jersey
I love the... "GM engineers wouldn't put something on your car without an excellent reason" ...type of thinking.
Didn't you know that people who make large salaries and work for well known companies know EVERYTHING. They don't put anything on car that doesn't improve upon it, like some dopey F-body owner who isn't an engineeer by trade might. Nope, everything they've designed is absolutly critical to the proper operation of your automobile.
In fact, if I were you I wouldn't even open the hood of your car. There is a BIG, SCARY engine under there. It is very complex and you won't understand how it works. You need to leave it to well paid professionals at your local Chevy dealer. Only they can begin to understand the whole "cold air, hot coolant" thing.
Didn't you know that people who make large salaries and work for well known companies know EVERYTHING. They don't put anything on car that doesn't improve upon it, like some dopey F-body owner who isn't an engineeer by trade might. Nope, everything they've designed is absolutly critical to the proper operation of your automobile.
In fact, if I were you I wouldn't even open the hood of your car. There is a BIG, SCARY engine under there. It is very complex and you won't understand how it works. You need to leave it to well paid professionals at your local Chevy dealer. Only they can begin to understand the whole "cold air, hot coolant" thing.
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TECH Regular
Joined: Mar 2005
Posts: 401
Likes: 0
From: DFW, Texas
How about this: If you want to do it, then do it. I've seen numbers proving small gains. You don't really need to do it because you won't notice any difference. It just saves some time later on. I live in TX. I did this mod because it was cheap, quick, and I was really bored that day. You might be running 0.0001 faster after this mod. Blah!
As I always say, every little bit counts!
Will it register a gain on a dyno? YES! But, actually determining defference before and after would be difficult. The slightest change in outside air temp, pressure, humidity, engine temp, and general engine inconsistancy would be more than enough throw off any gains of the TB bypass mod. If all variables were kept constant, which is nearly impossible to do, in my opinion there would be a slight dyno gain. Maybe 0.5-1rwhp. Will there be a gain you can feel? No.
Will it register a gain on a dyno? YES! But, actually determining defference before and after would be difficult. The slightest change in outside air temp, pressure, humidity, engine temp, and general engine inconsistancy would be more than enough throw off any gains of the TB bypass mod. If all variables were kept constant, which is nearly impossible to do, in my opinion there would be a slight dyno gain. Maybe 0.5-1rwhp. Will there be a gain you can feel? No.
Originally Posted by blacksnake
I love the... "GM engineers wouldn't put something on your car without an excellent reason" ...type of thinking.
Didn't you know that people who make large salaries and work for well known companies know EVERYTHING. They don't put anything on car that doesn't improve upon it, like some dopey F-body owner who isn't an engineeer by trade might. Nope, everything they've designed is absolutly critical to the proper operation of your automobile.
In fact, if I were you I wouldn't even open the hood of your car. There is a BIG, SCARY engine under there. It is very complex and you won't understand how it works. You need to leave it to well paid professionals at your local Chevy dealer. Only they can begin to understand the whole "cold air, hot coolant" thing.
Didn't you know that people who make large salaries and work for well known companies know EVERYTHING. They don't put anything on car that doesn't improve upon it, like some dopey F-body owner who isn't an engineeer by trade might. Nope, everything they've designed is absolutly critical to the proper operation of your automobile.
In fact, if I were you I wouldn't even open the hood of your car. There is a BIG, SCARY engine under there. It is very complex and you won't understand how it works. You need to leave it to well paid professionals at your local Chevy dealer. Only they can begin to understand the whole "cold air, hot coolant" thing.
I'm not denying it wasn't put there for ultimate performance. Hell, C.A.G.S wasn't put there for performance. It was put there so that they wouldn't have to pay the gas-guzzler tax on their cars. Pretty clever if you ask me.
This WAS done for a reason. I promise. Just like the baffles people remove doing the !FRA mod.
I highly doubt anyone will ever have a problem doing this mod, but people just need to realize the potential risks involved when it comes to modifying ANY car.
QUOTE: It was probably the same brain that put a 7.5" rear end in a 5.7l V8. Not everything that a car comes with from the factory is good for performance and/or necessary for your car to run right. Take top speed limiters for example. The dealer sets the top speed limiter to correspond to a given tire rating. The dealer doesn't want you to exceed the speed rating of the tire, have it blow and then deal with a lawsuit. If there were no speed limiters though how often would this really happen. I think the TB is similer. They don't want you to drive the car when it's 40 below and have the throttle plate stick open and then have a lawsuit. How often has this happened though....never.
This is why they did it. This mod has been done for I believe 12 years now, with NO negative side effects and is a proven mod. There are NO risks. As the previous posters have explained, this mod has no negative effects even in -0 degree conditions. It was done to cover GM's butt only.
This is why they did it. This mod has been done for I believe 12 years now, with NO negative side effects and is a proven mod. There are NO risks. As the previous posters have explained, this mod has no negative effects even in -0 degree conditions. It was done to cover GM's butt only.
On The Tree
Joined: Apr 2005
Posts: 131
Likes: 0
From: President of Sixpackistan
Originally Posted by MeentSS02
You aren't thinking about this from corporate America's perspective. If GM could have left this little feature off of these cars, they could have saved at least a buck or two in machining costs, parts, etc per car. And with as many cars as they make...hmmmmmm, that would add up pretty fast now wouldn't it? Some GM engineer thought this was important enough to include on this car, and most likely for safety reasons. He would have had to have a good reason to sell this to the bean counters they employ as well.
I'm not denying it wasn't put there for ultimate performance. Hell, C.A.G.S wasn't put there for performance. It was put there so that they wouldn't have to pay the gas-guzzler tax on their cars. Pretty clever if you ask me.
This WAS done for a reason. I promise. Just like the baffles people remove doing the !FRA mod.
I highly doubt anyone will ever have a problem doing this mod, but people just need to realize the potential risks involved when it comes to modifying ANY car.
I'm not denying it wasn't put there for ultimate performance. Hell, C.A.G.S wasn't put there for performance. It was put there so that they wouldn't have to pay the gas-guzzler tax on their cars. Pretty clever if you ask me.
This WAS done for a reason. I promise. Just like the baffles people remove doing the !FRA mod.
I highly doubt anyone will ever have a problem doing this mod, but people just need to realize the potential risks involved when it comes to modifying ANY car.
Their reason for installing it :
Automakers test their cars above the arctic circle, and in the heat of South Africa because people might actually try to drive in those temperatures.
My reason for uninstalling it:
I do not drive my car if it's less than 50 degrees out, because I don't have to. So, the tb bypass is patently unnecessary for my vehicles operating window.
