throttle body bypass
Race Director
Joined: Feb 2003
Posts: 11,133
Likes: 1
From: ~The DARKSIDE Group~
Originally Posted by caster5303
What's the advantage of doing this low cost mod?????? 
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
No advantage - but I did it anyway 
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
If you work on your motor a lot, it is worth it just not to have to undo the cooling lines to get the throttle body off. As a performance mod, its not worth anything that I have ever seen.
Racer
Joined: Oct 2004
Posts: 399
Likes: 0
From: Edgewood WA
Originally Posted by vettenuts
If you work on your motor a lot, it is worth it just not to have to undo the cooling lines to get the throttle body off. As a performance mod, its not worth anything that I have ever seen.
Good point, we sometimes focus on the performance claims and forget the value of not having to mess with the lines when doing other work.
Le Mans Master
Joined: Feb 2002
Posts: 5,970
Likes: 20
From: San Marcos Texas
I did it for $4. Go to homedepot and look by the compressors. There is a repair kit to repair 1/4" hoses. Cost $2.95 comes with a barbed connector and hose clamps. Then go to the autoparts store and buy 12" of 1/4" hose for $.96 and thats everything you need for under $4... 
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 29
From: Vancouver Washington
It cleans up the front of the engine. For just a few dollars I bought a length of hose, a length of ribbed hose cover, a clip to hold the hose cover to the back of the fan shroud, and two caps for the abandoned inlets. I ran the single length of hose and cover directly from the radiator to the manifold and pinned it to the fan shroud. It looks factory, minimizes the places it can leak, and gets it out of the way of everything else. (Now I'll get flamed for no pictures, but I'm just not that technologically advanced yet. :o )
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Pro
Joined: Feb 2004
Posts: 588
Likes: 0
From: TX
The reason behind the coolant going in the tb in the first place is to keep the tb from sticking in cold weather. The coolant running through the hose would actually heat up the tb eliminating stickage. But in warm locations such as Texas you dont need this.
On my 02 Silverado it has actually worked in reverse. The tb blade kept sticking. I have a friend who is a Gm tech whom I told him about the prob and he told me to do the mod on the truck. Well 20,000 miles later and I haven’t had a problem since. Dont ask my why it worked but it did.
O and when i got the vette I did it to its tb as well just for prevention.
On my 02 Silverado it has actually worked in reverse. The tb blade kept sticking. I have a friend who is a Gm tech whom I told him about the prob and he told me to do the mod on the truck. Well 20,000 miles later and I haven’t had a problem since. Dont ask my why it worked but it did.
O and when i got the vette I did it to its tb as well just for prevention.
Safety Car
Joined: Dec 2000
Posts: 3,950
Likes: 32
From: belleville n.j.
it never stuck on me during the winter months in NJ never for 5 years. i also got the fitting from home depot. i rather not have hot coolant pass through there even though it still will get hot.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by vettenuts
If you work on your motor a lot, it is worth it just not to have to undo the cooling lines to get the throttle body off. As a performance mod, its not worth anything that I have ever seen.
It's worth very little, if any in the way of HP, but if you want to do it cheaper, go down to the local parts store and buy a #4 size air conditioning hose barbed connector. It's used for splicing A/C hose. That and a couple of clamps and your good to go for about $8 - $10.HTH
Melting Slicks
Joined: Mar 2002
Posts: 2,203
Likes: 63
From: Staten Island NY
Its one of those cheap and small mods that in conjunction with other mods may make a small differance.
I did the TB Bypass, the zip tie mod and cut up a traffic cone to make a smooth coupler.
In my mind the car feels faster in the midrange and upper RPM band. And hey, it killed an afternoon doing those mods.
I did the TB Bypass, the zip tie mod and cut up a traffic cone to make a smooth coupler.
In my mind the car feels faster in the midrange and upper RPM band. And hey, it killed an afternoon doing those mods.
Pro
Joined: Feb 2004
Posts: 588
Likes: 0
From: TX
Originally Posted by LoneStarFRC
It's worth very little, if any in the way of HP, but if you want to do it cheaper, go down to the local parts store and buy a #4 size air conditioning hose barbed connector. It's used for splicing A/C hose. That and a couple of clamps and your good to go for about $8 - $10.HTH
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
You can NOT change the air temp by .000001% in the short time the air is in the trottle body ( .01 millisecond). Total waste of time. The throttle body temperature has no effect on the ambient temperature it digest because there just isnt enough time to change it. At ten cubic feet of air a second, that just ain't going to happen. The reason your car runs so good in the winter time is that the throttle body has no effect on the ambient air either. Meaning it does not heat the air up because the throttle body is at 190 F. Mother nature delivers dense 20/30 degree F air in the winter and thats what the throttle body digests.
Drifting
Joined: Jun 2000
Posts: 1,994
Likes: 0
From: Dunstable MA
Cruise-In II Veteran
Cruise-In V Veteran
Originally Posted by Evil-Twin
You can NOT change the air temp by .000001% in the short time the air is in the trottle body ( .01 millisecond). Total waste of time. The throttle body temperature has no effect on the ambient temperature it digest because there just isnt enough time to change it. At ten cubic feet of air a second, that just ain't going to happen. The reason your car runs so good in the winter time is that the throttle body has no effect on the ambient air either. Meaning it does not heat the air up because the throttle body is at 190 F. Mother nature delivers dense 20/30 degree F air in the winter and thats what the throttle body digests.
This was the situation that they ran into when they were cold weather testing the C5 up in Canada according to ACAR.
Racer
Joined: Oct 2004
Posts: 399
Likes: 0
From: Edgewood WA
Originally Posted by SPD KILZ
The reason behind the coolant going in the tb in the first place is to keep the tb from sticking in cold weather. The coolant running through the hose would actually heat up the tb eliminating stickage. But in warm locations such as Texas you dont need this.
On my 02 Silverado it has actually worked in reverse. The tb blade kept sticking. I have a friend who is a Gm tech whom I told him about the prob and he told me to do the mod on the truck. Well 20,000 miles later and I haven’t had a problem since. Dont ask my why it worked but it did.
O and when i got the vette I did it to its tb as well just for prevention.
On my 02 Silverado it has actually worked in reverse. The tb blade kept sticking. I have a friend who is a Gm tech whom I told him about the prob and he told me to do the mod on the truck. Well 20,000 miles later and I haven’t had a problem since. Dont ask my why it worked but it did.
O and when i got the vette I did it to its tb as well just for prevention.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by RPOZ16
The TB sticking problem was covered by a GM TSB for trucks. Blade gets covered with emmissions crap which prevents it from moving freely. I had my 2000 Yukon TB replaced under warranty at 36K and I cleaned it myself at 80K to eliminate the sticking. The only problem with the cleaning was the small mess with the coolant. Humm, guess I'll do the $4 bypass to prevent the mess next time. My 2 cents.
