I just did this mod this weekend as I live in Houston, same place josh does and it def doesnt get cold down here haha. Well damn i was surprised how hot that coolant hose gets. This 10 dollar mod has to get you at least like 5 horsepower just from the lower intake temperature.

 

Is jzs147 same?

 

There is wax in the inlet coolant hose. Inlet valve will close when it reach a certain temp. You wouldn't gain any hp for doing this. It might look clean for not having the coolant hose.
JPI

 

So basiclly this is pointless? There is already a valve that stops coolent from passing threw the TB when it gets to a temp? So why do this MOD?

 

Not sure but, I read an explanation that I thought made more sense.

When your sitting at a stop light and it is chilly the vortex that is created by a partially closed throttle valve can cause very low temperatures and if humid outside can cause freezing of the butterfly flap / throttle body.

I would recommend not doing this mod. Toyota is not stupid.

BP

 

it's not going to freeze at a stop light.

 

bwahahahah

never mind the engine sitting right underneath the throttle body,,,, heat soak, physics.

Now if you lived someplace where the weather gets to the - degree's, I would consider not doing this mod, if just for startup.

 

It would not mater because the fluids are cold during start up.

 

Can this be done on my 98 gs400 with the 1uzfe?