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tb coolant bypass

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Old May 19, 2002 | 06:31 PM
  #1  
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tb coolant bypass

It is possible to do a bypass on a vg. I havent seen anyone post about this. If so what would be required to do this. thanks
Old May 19, 2002 | 06:57 PM
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Re: tb coolant bypass

Originally posted by mymaxownz
It is possible to do a bypass on a vg. I havent seen anyone post about this. If so what would be required to do this. thanks
I believe someone has done it.
Old May 19, 2002 | 09:24 PM
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yes. remove the intake collector, and you'll see the hoses underneath it. 20 min job.
Old May 20, 2002 | 12:48 AM
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Originally posted by Matt93SE
yes. remove the intake collector, and you'll see the hoses underneath it. 20 min job.
can i ask what is the purpose of the bypass?


when i had my intake apart i gave it a thought about bypassing it or not. but not knowing what the real reason for doing it, i just left it stock.

so im confused on that one b/c,
Theoretically speaking
Isnt the coolant "suppost" to be cooling the TB? therefore having a cooler intake temp?

b/c on a VG the TB is right ontop of the valve cover and exhaust manifold so with the heat rising its collecting heat from those items and the coolant is cooling it off??
Old May 20, 2002 | 02:54 AM
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I was thinking about this as well

I dont know if this would help on a vg any one know ?and if so are there any write ups?
Old May 20, 2002 | 05:45 AM
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when the car is moving, there's enough air under the hood that you don't have to worry about the heat rising off the manifold.
there's also always air being sucked in through the intake to help keep it cool. the "coolant" is around 180-210 degrees when it's at operating temperature. the incoming air will never be more than a few degrees over the outside air temp..
so as soon as it hits the TB, its gets heated by the "coolant".
Old May 20, 2002 | 08:22 AM
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Originally posted by Matt93SE
when the car is moving, there's enough air under the hood that you don't have to worry about the heat rising off the manifold.
there's also always air being sucked in through the intake to help keep it cool. the "coolant" is around 180-210 degrees when it's at operating temperature. the incoming air will never be more than a few degrees over the outside air temp..
so as soon as it hits the TB, its gets heated by the "coolant".
SO basically this mod will allow cooler air to get to your engine increaseing density or air and power...?
Old May 20, 2002 | 09:41 AM
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Originally posted by mymaxownz
SO basically this mod will allow cooler air to get to your engine increaseing density or air and power...?
yup, since the warm coolant is now routed away from the TB, the incoming air remains cool instaead of heating up as it usually would when it enters the TB(which is now cool). some say this mod shouldn't be done in the winter time(if temps are VERY cold) bedause it is possible for the throttle plates to freeze in plcae(open or shut)
Old May 20, 2002 | 10:55 AM
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Originally posted by DA-MAX
yup, since the warm coolant is now routed away from the TB, the incoming air remains cool instaead of heating up as it usually would when it enters the TB(which is now cool). some say this mod shouldn't be done in the winter time(if temps are VERY cold) bedause it is possible for the throttle plates to freeze in plcae(open or shut)
It would have to be REAAALLY cold for that to happen. like -30. At that point, you shouldn't be driving the car anyway. You should be inside where it's warm and dry.
Old May 20, 2002 | 03:38 PM
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Very interesant free mod!
How much power could this give to a maxima?(I dont think it will be that much)
Old May 20, 2002 | 04:21 PM
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whos going to do it first?

so one do it.... take pics and stuff... it sounds like it would work... y not?
Old May 20, 2002 | 06:03 PM
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Re: whos going to do it first?

Tomorrow is my day off maybe ill take a look at it. I have a bad feeling that intake is guna be a pita to get off.
Old May 21, 2002 | 10:18 AM
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Originally posted by Matt93SE
when the car is moving, there's enough air under the hood that you don't have to worry about the heat rising off the manifold.
there's also always air being sucked in through the intake to help keep it cool. the "coolant" is around 180-210 degrees when it's at operating temperature. the incoming air will never be more than a few degrees over the outside air temp..
so as soon as it hits the TB, its gets heated by the "coolant".
that makes perfect sense, its a wonder why nissan put coolant lines on the tb to begin with.

then again, its a wonder why nissan had such a horrible stock "Y" pipe
Old May 21, 2002 | 10:52 AM
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I have it done to mine

Didnt notice too much of a difference, as far as the bootydyno goes it has a bit more pull through the low end. Its a freebee mod and i havent had any problems from it in the months or so ive had it done....and if my engine blows up......MATT93SE INSTALLED IT
Old May 21, 2002 | 11:14 AM
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Re: I have it done to mine

Originally posted by gotmilk2000
Didnt notice too much of a difference, as far as the bootydyno goes it has a bit more pull through the low end. Its a freebee mod and i havent had any problems from it in the months or so ive had it done....and if my engine blows up......MATT93SE INSTALLED IT
Aint my fault.. you're the one that was jacking with your timing without a timing light!
oh.. check your driveway/yard for that funky little prybar I was using on my car.. I didn't seem to find it when I unloaded the car yesterday.
dad'll kill me if I lose that thing!
Old May 24, 2002 | 02:41 AM
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Re: I was thinking about this as well

Originally posted by darrick
I dont know if this would help on a vg any one know ?and if so are there any write ups?
Dude you're from Dallas right?

Man I coulda sworn I saw your car (or one just like yours) a couple weeks back on Buckner and Lake June...

I remember passing it and seeing the new Max rims on it.....either that was you.....or someone with a black VG and the rims just like yours!
Old May 24, 2002 | 05:49 AM
  #17  
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Originally posted by Matt93SE
when the car is moving, there's enough air under the hood that you don't have to worry about the heat rising off the manifold.
there's also always air being sucked in through the intake to help keep it cool. the "coolant" is around 180-210 degrees when it's at operating temperature. the incoming air will never be more than a few degrees over the outside air temp..
so as soon as it hits the TB, its gets heated by the "coolant".

Matt: if u do alot of city driving, stop and go traffic, isn't that causing overheat on the engine?
Old May 24, 2002 | 02:13 PM
  #18  
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Originally posted by phat



Matt: if u do alot of city driving, stop and go traffic, isn't that causing overheat on the engine?

uhhh, you don't bypass ALL the coolant. just the throttle body.
and I do a lot of driving in general. most of it is not stop & go. 70% is highway, the rest is "light city driving". i.e. 1 miles, stoplight, wait 30 sec, 1 mile, stoplight... etc.


none of this sitting in traffic crap that big cities deal with.
Old May 25, 2002 | 11:55 PM
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Originally posted by Matt93SE



none of this sitting in traffic crap that big cities deal with.


Did you ever do the rest of the coolant lines Matt?

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