Question about Alternate Method of TB Bypass????
Thread Starter
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
Question about Alternate Method of TB Bypass????
Traditional method: unplug both hoses from throttle body and plug them together.
How about??? remove both hoses and plug their origins? The one that enters the TB from the front comes from a T in the upper radiator hose and the on that enters the pass side of the TB Ts off of another heater hose. Why not just plug the two Ts and completely remove the hoses?
:blueangel:
How about??? remove both hoses and plug their origins? The one that enters the TB from the front comes from a T in the upper radiator hose and the on that enters the pass side of the TB Ts off of another heater hose. Why not just plug the two Ts and completely remove the hoses?
:blueangel:
Le Mans Master
Joined: Sep 2001
Posts: 5,404
Likes: 45
From: Arlington Tx
St. Jude Donor '08
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
i thought about the same thing...i'd like to find a couple of valves to put on each hose on the TB that i could open and close when i needed to...
Safety Car
Joined: Jul 2001
Posts: 3,524
Likes: 1
From: Pinellas Florida Misfit
Cruise-In III Veteran
Re: Question about Alternate Method of TB Bypass???? (qblue92)
As far as I remember.. you need the flow going through there... can't remember if it's because it will cause an air pocket or where the feed is coming from that it needs to have the flow through.
Instructor
Joined: Dec 2001
Posts: 114
Likes: 0
From: Rancho Palos Verdes CA
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
I'm pretty sure that on a 94-96, both ends are 3/8's. All you have to do is disconnect the hose coming from your radiator and plug it into the line coming form the heads. No extra connector, the parts are on your car. I know it works for the 96, just did it. Took 5 minutes.
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: Question about Alternate Method of TB Bypass???? (qblue92)
i thought about the same thing...i'd like to find a couple of valves to put on each hose on the TB that i could open and close when i needed to...
Thread Starter
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
Re: Question about Alternate Method of TB Bypass???? (Scooby)
I'm pretty sure that on a 94-96, both ends are 3/8's. All you have to do is disconnect the hose coming from your radiator and plug it into the line coming form the heads. No extra connector, the parts are on your car. I know it works for the 96, just did it. Took 5 minutes.
Safety Car
Joined: Jun 1999
Posts: 3,570
Likes: 3
From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
Plugging the line coming from the rear of the heads is not a good idea.
Because of the reverse cooling system on LT1/LT4 engines, the heads need to vent any steam created around the exhaust ports back to the radiator. Otherwise, air will accumulate causing the heads to overheat. Not good.
So a steel return line was added to the back of the heads which takes a detour thru the throttle body before getting back to the radiator. A common method to by-pass the throttle body is to simply remove the hose that goes from the drivers side front of the throttle body and reroute it to the steel line that runs from the back of the heads and ends at the front of the intake manifold passangers side.
Because of the reverse cooling system on LT1/LT4 engines, the heads need to vent any steam created around the exhaust ports back to the radiator. Otherwise, air will accumulate causing the heads to overheat. Not good.
So a steel return line was added to the back of the heads which takes a detour thru the throttle body before getting back to the radiator. A common method to by-pass the throttle body is to simply remove the hose that goes from the drivers side front of the throttle body and reroute it to the steel line that runs from the back of the heads and ends at the front of the intake manifold passangers side.
Burning Brakes
Joined: Jan 2001
Posts: 964
Likes: 0
From: Cedar Park Texas
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
With your method you are shutting off the flow. The steam tube running along the valve cover needs to connect to the tee coming off the radiator in order to complete the flow.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Drifting
Joined: Jan 2001
Posts: 1,669
Likes: 1
Re: Question about Alternate Method of TB Bypass???? (Ed Ut)
All you have to do is complete the connection. You do not need coolant running throught the TB. You have a hose that starts a point A then it goes the point B(the TB) and then on the point C the heater hose line. Well just get the correct size heater hose and connect point A directly to point C. I have an L98 car so my setup was a little different, but I used a Aeroquip fitting coming out of my intake into a 10AN 120 degree fitting and used blue aeroquip silicone hose to go straight to my heater line. It works great and looks very cool.
Racer
Joined: Jan 2000
Posts: 264
Likes: 0
From: aka... The Bud Man... Brunswick, Mo.
Re: Question about Alternate Method of TB Bypass???? (snaketr)
Did mine the same as scooby. Don`t waste your money on one of those bypass kits.Just takes a few minutes to reroute one hose. very simple. :cheers:
Safety Car
Joined: Oct 1999
Posts: 4,679
Likes: 2
From: Honolulu HI
Re: Question about Alternate Method of TB Bypass???? (qblue92)
Waaaay back I had a 68 Toyota Land Cruiser. It had a rear seat heater and the hoses to it passed through the passenger compartment. In the summer it would heat up the interiior just from passing through. It came from the factory with a two petcock style shut offs so you could stop the flow in the summer. So I know that Toyaota made such a thing and it worked just fine.
Aloha,
Larry
Aloha,
Larry
Melting Slicks
Joined: Jul 1999
Posts: 3,472
Likes: 1
From: Godspeed Mikey Hogsmak Invitational Spring Skyline Drive Corvette Cruise
Cruise-In I Veteran
Cruise-In II Veteran
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
If you use 95+ upper radiator hose you don't need the T any more and for the heater hose you can put a prestone flush adapter in or get the 95+ molded hose also. I jusrt did this while replacing my radiator :cheers:
Melting Slicks
Joined: Aug 2001
Posts: 2,753
Likes: 1
From: Fishkill NY
Re: Question about Alternate Method of TB Bypass???? (69shark)
If you wanted to use bypass valves for summer and colder weather (not winter driving, god no!!), you can go to a pluming supply and get the ball valves they use in heating. I would think that would work if thay had the right size. Worth looking at!! :yesnod:
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
Plugging those hoses will loose cooling to the heads.
Team Owner
Joined: Mar 2001
Posts: 30,858
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Re: Question about Alternate Method of TB Bypass???? (69shark)
If you use 95+ upper radiator hose you don't need the T any more and for the heater hose you can put a prestone flush adapter in or get the 95+ molded hose also. I jusrt did this while replacing my radiator :cheers:
I've got a 95 Mikey has a 94
it's different. If you get the hose from a 95 your all set.
I wouldn't bother with a vavle.
That's what I was going to due, but I ran mine disconnected all last winter.
If it runs fine in Michigan winters your all fine too!
[Modified by BrianCunningham, 10:15 PM 12/15/2001]
Safety Car
Joined: Mar 2000
Posts: 3,620
Likes: 2
From: Hillsboro OR
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
I took care of this on my 94 when I put in the 383. I replaced the hoses that were connected together with the T fitting with one hose from the waterpump to the heater core. I used a section of cast iron pipe to connect the two upper raditor hoses together. Saved the parts for the TB heating stuff.
The stuff from the back of the heads goes to an aluminum line that sends the air to the upper overflow tank and antifreeze to the top of the radiator.
The stuff from the back of the heads goes to an aluminum line that sends the air to the upper overflow tank and antifreeze to the top of the radiator.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Question about Alternate Method of TB Bypass???? (ZBRA)
I just went to ACE hardware and picked up a hose barb that can connect two hoses. I then went and spent $2 on a new length of hose. On the 92 anyway, you can't just disconnect the hoses and connect them around the throttle body, you don't have the slack. So I took my new piece of hose and replaced the piece that comes off the T on the upper radiator hose. I just trimmed my new hose so that it meets up with the passenger side one with the hose barb. It looks fine and you don't have to worry about re-routing anything. You could also put it back very quickly if you felt like you needed it because nothing on the car has actually been modified.