Bypass?
Le Mans Master
Joined: Sep 2000
Posts: 6,473
Likes: 1
From: Cleveland
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Bypass? (Klimper)
Bypassing the TB is good for about 5-7hp or so. Hot air is blown into the throttle body to keep it from freezing up in winter conditions, but it isn't necessary, so all it's really doing is hurting performance (cold air=hp) It took me 10 min to do and cost me around 50 cents to do , I used this site
http://www.westol.com/~brettd/corvette/tbcool.html
http://www.westol.com/~brettd/corvette/tbcool.html
Team Owner
Joined: Sep 2001
Posts: 62,145
Likes: 1,730
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Bypass? (Klimper)
GM designed the coolant to run thru the TB to keep the plates from freezing in extreme cold. Only problem is that it has to get damned cold for that to happen(like alaska, montana-type cold), and it could only happen if you were creeping along, once the engine warms up this coolant does nothing but heat up the air coming into the plenum, robbing you of a couple hp.
All you do is disconnect the hoses coming in and out of the TB, and mate them together with a piece of pipe and two clamps.
All you do is disconnect the hoses coming in and out of the TB, and mate them together with a piece of pipe and two clamps.
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Re: Bypass? (Klimper)
The object is to eliminate the TB from the coolant flow, thus not heating the air as it passes through. The theory is that a cooler air chagre is a denser one.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Bypass? (Klimper)
I got a U shaped piece of heater hose at Auto Zone, cut one end to lenght, removed the heater hose & short stub from the TB, connected the new piece directly between the water pump fitting and the heater. I cut the heater hose so that the coupling was behind and below the A/C compressor and out of sight for a neat job.
You can get two rubber vacuum hose nipples to fit over the TB coolant fittings to dress up the job.
As mentioned the TB now runs much cooler than when coolant was running through it.
You can get two rubber vacuum hose nipples to fit over the TB coolant fittings to dress up the job.
As mentioned the TB now runs much cooler than when coolant was running through it.
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Re: Bypass? (Klimper)
They designed and built these Vettes to fly and it gets cold at altitude! That's why the throttle body is heated; to stop icing. I keep mine on the ground, so I did the bypass. Sounds like a heart operation. :lol:
Strick
Strick
