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

Throttle Body Bypass

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Old Apr 19, 2008 | 11:28 AM
  #21  
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Originally Posted by Calderone
yes i understand now but ...any pics ?
im kinda lost !! im crazy about all the hoses !!!!
thanks
Look at SamLam's picture. The heater hose that runs from directly below the intake coupler around the A/C components back toward the firewall is it.
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Old Apr 19, 2008 | 11:48 AM
  #22  
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Originally Posted by Calderone
yes i understand now but ...any pics ?
im kinda lost !! im crazy about all the hoses !!!!
thanks
Here is my bypass.
The hose with clamp goes under AC compressor and straight onto intake base nipple.In the pic you can also see where the other heater core line ties into tee(water pump and oil cooler).

Her you can see the coolant line going into intake base nipple.

Few more pics




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Old Apr 19, 2008 | 11:54 AM
  #23  
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Oh, and if you are wondering why you don't see any coolant nipples on TB, it's because I cut them off.
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Old Apr 19, 2008 | 08:28 PM
  #24  
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i will do this mod while im there .....
i am posting pics to find out if what im doing its OK
And to illustrate others who want to do this mod.-
PLEASE CORRECT ME IF IM WRONG,Bypassing the TB leaves the TB ..with zero water contact ??? i mean if i bypass this ...the TB has nothing to do with water anymore ????
Here i go...

PLEASE CORRECT ME IF IM WRONG ...OR IS THIS PERFECT ?

Last edited by Calderone; Apr 19, 2008 at 08:31 PM.
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Old Apr 19, 2008 | 08:31 PM
  #25  
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While you were posting ...i was doing this guide..
not sure if im correct...
i think it is

So the TB its free of coolant ...?
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Old Apr 19, 2008 | 08:32 PM
  #26  
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Originally Posted by AGENT 86
Oh, and if you are wondering why you don't see any coolant nipples on TB, it's because I cut them off.


what's that picture ? is that a electrical connector?
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Old Apr 19, 2008 | 08:33 PM
  #27  
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Originally Posted by AGENT 86
Oh, and if you are wondering why you don't see any coolant nipples on TB, it's because I cut them off.
Good idea, because their kinda in the way. I have to look at the TB and see what to do with those hose fittings.
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Old Apr 19, 2008 | 08:34 PM
  #28  
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Originally Posted by Calderone
what's that picture ? is that a electrical connector?
It's the IAC but I'm not sure how it relates to cutting off the H2O passages.
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Old Apr 19, 2008 | 08:35 PM
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Originally Posted by jsup
It's the IAC but I'm not sure how it relates to cutting off the H2O passages.
i was wondering the same !!!!
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Old Apr 19, 2008 | 08:59 PM
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Now my doubt its what should i do with port 2 of TB ? Should i cap it ?what's there for 87's ?
thanks !
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Old Apr 19, 2008 | 09:05 PM
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Originally Posted by Calderone
Now my doubt its what should i do with port 2 of TB ? Should i cap it ?what's there for 87's ?
thanks !
#2 is a vacuum fitting that swings around from the drivers side, which has a 90 degree connection on it.
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Old Apr 19, 2008 | 09:07 PM
  #32  
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Originally Posted by jsup
#2 is a vacuum fitting that swings around from the drivers side, which has a 90 degree connection on it.
Can you post a pic ?
most of the big cool pics i got were from 86's and they do not have the # 2 port
thanks
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Old Apr 19, 2008 | 09:08 PM
  #33  
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Originally Posted by Calderone
Can you post a pic ?
most of the big cool pics i got were from 86's and they do not have the # 2 port
thanks
My car is at the shop, for the next week. Go to www.picturetrail.com

on the top right put in jsupino. I looked, can't really see it.

there's a lot of motor pics there, maybe you'll see something that helps.

Last edited by jsup; Apr 19, 2008 at 09:10 PM.
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Old Apr 19, 2008 | 09:23 PM
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Originally Posted by jsup
It's the IAC but I'm not sure how it relates to cutting off the H2O passages.
It's the IAC installed in what's left of the lower TB plate, after removing the nipples and coolant passage.
Turn your TB over and you will see.
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Old Apr 19, 2008 | 09:25 PM
  #35  
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Originally Posted by AGENT 86
It's the IAC installed in what's left of the lower TB plate, after removing the nipples and coolant passage.
Turn your TB over and you will see.
OK GOT IT!!! Nice work.
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Old Apr 19, 2008 | 09:27 PM
  #36  
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Originally Posted by Calderone
Now my doubt its what should i do with port 2 of TB ? Should i cap it ?what's there for 87's ?
thanks !
Port 2 is plugged on my 86, 87 may be the same. Does the aluminum tube for PCV>intake vacuum port(drivers side) have a nipple and hose going to canister ?
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Old Apr 19, 2008 | 09:42 PM
  #37  
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Originally Posted by AGENT 86
Port 2 is plugged on my 86, 87 may be the same. Does the aluminum tube for PCV>intake vacuum port(drivers side) have a nipple and hose going to canister ?
My pcv has a hose that goes directly to the driver's side port of the intake...is that right ¨?

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Old Apr 19, 2008 | 11:41 PM
  #38  
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Originally Posted by Calderone
My pcv has a hose that goes directly to the driver's side port of the intake...is that right ¨?

This pic is correct.
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Old Apr 19, 2008 | 11:44 PM
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thanks pacer !
but ....now my only mistery its ...
what goes on port 2 ?
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Old Apr 19, 2008 | 11:45 PM
  #40  
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I can't help you with port 2. '86 cars did not use them. The vacuum diagram on radiator shroud will show what it goes to, but obviously won't show how it's actually routed on the engine bay.
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