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

Throttle body by-pass

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Old Apr 8, 2006 | 03:36 AM
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Default Throttle body by-pass

I have a 91 my TB has like four or five hoses coming out of it. Which is the correct one on the left side? The lowest one is the biggest; it is the only one on that side with a clamp on it. My connector piece is the same size on both sides. Is that correct? Do I just connect the two lower hoses from each side?
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Old Apr 8, 2006 | 04:08 AM
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the 2 hoses that go into the housing under the TB.
One on left side(from front ) and hose that connects to manifold .
Believe you need an adapter piece that has 2 different sizes to suit the the hoses you are reconnecting unless you can fab something up.
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Old Apr 8, 2006 | 11:56 AM
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Originally Posted by rodj
the 2 hoses that go into the housing under the TB.
One on left side(from front ) and hose that connects to manifold .
Believe you need an adapter piece that has 2 different sizes to suit the the hoses you are reconnecting unless you can fab something up.
Does anyone have a pic, the instructions doesn't show 3 hoses coming out of one side (passenger side). I dont'know which one it is.
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Old Apr 8, 2006 | 02:41 PM
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Originally Posted by Bubba91
My connector piece is the same size on both sides. Is that correct? Do I just connect the two lower hoses from each side?
Yes, just connect the two heater hoses together. I just bought a 4ft. length of heater hose and routed it from the intake manifold to the heater core, it looks much neater this way.

The connections on both sides are the same size on the L98 engines, the throttle body by-pass kits are for the LT1 engines that use two different size hoses.

Last edited by GKK; Apr 8, 2006 at 02:43 PM.
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Old Apr 8, 2006 | 04:10 PM
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Originally Posted by GKK
Yes, just connect the two heater hoses together. I just bought a 4ft. length of heater hose and routed it from the intake manifold to the heater core, it looks much neater this way.

The connections on both sides are the same size on the L98 engines, the throttle body by-pass kits are for the LT1 engines that use two different size hoses.
Thanks! Anyone want a LT1 TB by-pass?
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Old Apr 9, 2006 | 11:42 AM
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Default by-pass

Hi,
I do have a bypass kit that is all the same size. It's just a small piece,( brass with ribs for hoses) that is 2 or three inches long, with 2 hose clamps.
Ihave a LT1 92, I never put it on because it seem like it was wrong. Thanks to you my asumption was right. Paided 13 bucks for this. Still new from superformance I think. Would consider a trade if you think the one you have is right for the LT1. Would pay the diffference to you.
Thanks,lbreen...breenl@sbcglobal.net
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Old May 28, 2006 | 11:02 AM
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Default A Great guy

Hi,
Just wanted to say, that Bubba91, sent me his bypass, not wanting any kind of payment, after several times asking him what I could send him.
A great guy like this is the kind of people we have in our forum.
Thanks again Bubba91. lbreen
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Old May 28, 2006 | 12:50 PM
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Old May 28, 2006 | 12:54 PM
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Originally Posted by lbreen
Hi,
Just wanted to say, that Bubba91, sent me his bypass, not wanting any kind of payment, after several times asking him what I could send him.
A great guy like this is the kind of people we have in our forum.
Thanks again Bubba91. lbreen
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