06-09 throttle body bypass
#1
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#2
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Drilling the hole on the gasket will allow you to bleed the head easier. You can run the hose bypassing the throttle body to allow coolant flow back to the system
#4
Other option is just removing that hard line on top of the TB and running a new line from the port by the intake manifold to the soft hose on the other side of the TB. Hose is 5/16." Buy a 5/16" barb and connect the hoses there.
You might as well also delete that hardline that goes from the crankcase to the intake and remove that OEM hardline mess completely.
You might as well also delete that hardline that goes from the crankcase to the intake and remove that OEM hardline mess completely.
#7
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#8
Prevents hot coolant from circulating through the throttle body and heating it up. The OEM system circulates coolant through the TB to warm it up during cold start situations. Many guys in warmer climates or guys that drive in warm weather only will often do this coolant bypass mod. I bypassed my tb in a similar fashion to OP, but also removed the small hard line piece.
#9
I don't believe its for cold starts, as by the time coolant is warm enough to provide any heat to intake, you're well past starting and have been driving for a bit.
Many production cars heat the IM to prevent icing in very cold weather. If its cold enough out, the intake can begin to ice up, and restrict airflow, choking engine, leaving you stranded in the worst possible weather. So Honda had to include it for liability, even if its not the best thing for performance and throttle response.
I don't know about you, but even though I sometimes drive my S year 'round, I am sure I won't ever be using it when its cold enough out to freeze anything that is bolted to the hot engine.
So anything that can be done to get rid of the IM heater sounds like a good plan to me.
Many production cars heat the IM to prevent icing in very cold weather. If its cold enough out, the intake can begin to ice up, and restrict airflow, choking engine, leaving you stranded in the worst possible weather. So Honda had to include it for liability, even if its not the best thing for performance and throttle response.
I don't know about you, but even though I sometimes drive my S year 'round, I am sure I won't ever be using it when its cold enough out to freeze anything that is bolted to the hot engine.
So anything that can be done to get rid of the IM heater sounds like a good plan to me.
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