C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Throttle Body Bypass

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Old Dec 6, 2007 | 10:51 AM
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Default Throttle Body Bypass

Should I just simply bypass the throttle body coolant lines when I put my intake back together.

Opinions?
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Old Dec 6, 2007 | 10:56 AM
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I wouldn't "bypass the throttle body coolant lines". I would bypass the throttle body with the coolant lines.

RACE ON!!!
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Old Dec 6, 2007 | 11:26 AM
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There's a theory that by not heating the throttle body, you keep the intake air cooler and make a little more power. Not sure how much difference it makes, but I've done it on my 86, couldn't hurt

Paul
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Old Dec 6, 2007 | 12:38 PM
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I agree, it couldn't hurt and it will help, just not very much. Less heat is always an improvement. I did it to help clean up the engine area a bit. I capped one side and put a radiator flushing tee in the other side. In combination with the electric water pump I have, flushing the engine is eeeeeeasy.
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Old Dec 6, 2007 | 01:00 PM
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Yeah i'd go ahead and do it.
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Old Dec 6, 2007 | 03:24 PM
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Losing a hose that crawls over the valve cover, makes it worthy.
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Old Dec 6, 2007 | 03:54 PM
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Another advantage is that it'll make it much easier to take off the TB next time.
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Old Dec 6, 2007 | 06:47 PM
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jsup: Here is a photo of ONE method of bypassing the TB coolant passages.

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Old Jan 6, 2008 | 12:41 PM
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Help me out here...my heater core leaked, and is currently bypassed...
I want to bypass my throttle body as well, where would I run teh hoses
to and from?

Please illustrate if possible with pictures...thanks!
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Old Jan 6, 2008 | 12:59 PM
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FWIW, I went to Napa, they had 5/8 hose with a 90 degree bend in it. I will cut to size, and done.
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Old Jan 6, 2008 | 01:40 PM
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I am wanting to know EXACTLY where to cut and what im confused and dont want my engine to bleed trouble
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Old Jan 7, 2008 | 03:55 AM
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Originally Posted by Hotred94
I agree, it couldn't hurt and it will help, just not very much. Less heat is always an improvement. I did it to help clean up the engine area a bit. I capped one side and put a radiator flushing tee in the other side. In combination with the electric water pump I have, flushing the engine is eeeeeeasy.
I agree wholeheartedly with the capping. All you do is cap the supply and return points as well as the spots on the t/b. They have the cap kits at most of the parts supply stores. As others have stated, benefits are cleaner engine bay with less hoses and you can take off your t/b without making a mess.
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Old Jan 7, 2008 | 04:21 AM
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Originally Posted by 'Shifter
Help me out here...my heater core leaked, and is currently bypassed...
I want to bypass my throttle body as well, where would I run teh hoses
to and from?

Please illustrate if possible with pictures...thanks!
Look at the pic in post#8. The end that you cannot see goes straight into the coolant fitting on the front of intake base where your throttle body is connected to right now. Once that is cone, the hoses on the throttle body can be eliminated and you are now bypassed.
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Old Jan 7, 2008 | 10:44 AM
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Originally Posted by 86PACER
Look at the pic in post#8. The end that you cannot see goes straight into the coolant fitting on the front of intake base where your throttle body is connected to right now. Once that is cone, the hoses on the throttle body can be eliminated and you are now bypassed.
That's what I figured when I was looking at it yesterday, but it just wouldn't make sense to me....

Thanks!
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Old Apr 18, 2008 | 10:35 PM
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interesting,its a good mod ?
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Old Apr 18, 2008 | 11:18 PM
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Originally Posted by AGENT 86
Losing a hose that crawls over the valve cover, makes it worthy.
BINGO, we have a winna. I doubt if you will ever see even a single pony but it helps in cleaning up where the engine lives.
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Old Apr 18, 2008 | 11:33 PM
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Would be cool to see the stock route
compared to the bypassed route ....
any before/after pics ?
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To Throttle Body Bypass

Old Apr 19, 2008 | 09:15 AM
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Originally Posted by Calderone
Would be cool to see the stock route
compared to the bypassed route ....
any before/after pics ?
Its not really rocket science. The hose originally goes from the heater core into your throttle body and then out of the throttle body into your intake manifold. All your doing is running the hose from the heater core directly to the intake manifold, thus "bypassing" the throttle body.
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Old Apr 19, 2008 | 10:34 AM
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yes i understand now but ...any pics ?
im kinda lost !! im crazy about all the hoses !!!!
thanks
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Old Apr 19, 2008 | 10:48 AM
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I don't have any pics, but I only used a single piece of hose. I ran one piece of 5/8" hose from the heater core directly to the intake, so no connections.
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