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

Question on throttle bypass, unique situation?

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Old Apr 29, 2004 | 09:02 AM
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Default Question on throttle bypass, unique situation?

I'm going to do the throttle bypass, but will not be going to the heater core, as that has been removed for weight.

In all reality, will this just have the hose running from the water pump back to the water pump?

Can someone post a photoshop picture with a red line showing how this would be done?

Plumbing is not my strength, thanks for your help.
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Old Apr 29, 2004 | 10:19 AM
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Default Re: Question on throttle bypass, unique situation? (gene284)

Sctratching my head here but I think you can just plug those hoses. Pretty sure you can just find the heater core hoses and where they start and plug em.
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Old Apr 29, 2004 | 02:14 PM
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Default Re: Question on throttle bypass, unique situation? (VictorRussell'92)

This was done on my 91 to bypass the core until replacement. If I remember correctly, the water pump will be connected to the high surge tank inlet, the high surge tank outlet will be connected to the intake, and the shin bone will be connected to the thight bone, etc, etc etc :crazy:
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Old Apr 29, 2004 | 03:21 PM
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Default Re: Question on throttle bypass, unique situation? (VictorRussell'92)

The project is to eliminate the heater, as well as the warming of the throttle body, and do it as neat as possible.

It appears from the manual that the front intake manifold outlet is the thermostat bypass.

It would appear that the hot water runs as follows:
1. exit engine through front of intake
2. enter throttle body
3. leave throttle body
4. go towards heater core
5. leave heater core
6. enter water pump on passenger side.

I could shorten this to:
1. exit engine through front of intake
2. enter water pump on passenger side


However, I would prefer not to have even this hose there.
I assume this is to prevent the pump from cavitating when the thermostat is closed. Could two 1/16 holes in the thermostat housing be enough to allow some water flow and prevent cavitation, and still allow the thermostat to function? Then not install the short hose mentioned above, then plug the front intake and the passenger side hole in the water pump?

Has anyone done this, or something of this nature to eliminate these hoses?
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Old Apr 29, 2004 | 03:28 PM
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Default Re: Question on throttle bypass, unique situation? (gene284)

What year car is this?
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Old Apr 29, 2004 | 04:00 PM
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Default Re: Question on throttle bypass, unique situation? (VictorRussell'92)

I'm sorry, should have mentioned it. L98, 1987.
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