Throttle body

amick5 · Feb 26, 2006

I removed the coolant going to the throttle body and rerouted it under the body.Is the coolant designed for emissions through the throttle body?Also wanted to set my timming to 16 degrees to help with pick up. Are these good ideas and are there any more you can think of? 1990 5.0 LX Hatchback.K&N FIPK,O/R H pipe ,2.5 CATBACK Flowmaster series 40.other then that mostly stock

Jack's95gt · Feb 26, 2006

The cooling lines goes to the spacer. From what I have read, there's no advance from removing the cooling lines or the EGR system.

amick5 · Feb 26, 2006

well the coolant line was heating the air to collant temp and I thought that hot air was a hp reducer

04sleeper · Feb 26, 2006

amick5 said:
well the coolant line was heating the air to collant temp and I thought that hot air was a hp reducer

Actually that cools the EGR which gets a lot hotter than the coolant.

If you unhook the coolant line without plugging up the center passage port on the intake you are actually making the EGR even hotter which is defeating your intentions.

Maryland Stang · Feb 26, 2006

I believe the reverse is true. The coolant is actually removing heat from the spacer. The EGR valve flows hot exhaust gasses to the intake and the coolant is carrying some of the heat away.

amick5 · Feb 26, 2006

well thanks .I believe now that I had gotten some bad advice from a mechanic. Anything about advancing the timming to 16 degrees?

04sleeper · Feb 26, 2006

amick5 said:
well thanks .I believe now that I had gotten some bad advice from a mechanic. Anything about advancing the timming to 16 degrees?

If your car is still stock then I would try somewhere around 14 degrees with premiun octane fuel.
Drive you car around under a load with your window down and listen for for "pinging" from the engine. If you hear it, back the timing down a degree or two and try again.
Do this until you don't hear any "pinging" coming from the engine.

amick5 · Feb 26, 2006

TY sleeper for the good advice

04sleeper · Feb 26, 2006

No Problem.

onefstsnake · Apr 12, 2006

Sorry to bring a thread back from the dead...

The reason coolant flows though the TB is to keep the TB from freezing and sticking.

At the rate the air is moving through the TB it could freeze over.

Really only usefull during winter.

TrickStang37 · Apr 13, 2006

i never EVER had problems after eliminating the coolant lines from the throttle body. The throttle body area did feel much cooler with them removed.

vristang · Apr 13, 2006

onefstsnake said:
Sorry to bring a thread back from the dead...
The reason coolant flows though the TB is to keep the TB from freezing and sticking.
At the rate the air is moving through the TB it could freeze over.
Really only usefull during winter.

While there is a cooling affect due to the air pulling past the TB, it is nowhere near great enough to initiate freezing. In the few datalogs I have done in the last week or 2, I have never seen the ACT temp get below 100F, once the engine is warm. I don't have the large heat sink of an upper intake either, meaning the long runner style. I am using a box style Comp Polymer intake.
When the engine is cold, the coolant is cold as well, so the affect of coolant would be minimal for preventing freezing of the TB.

TrickStang37 said:
i never EVER had problems after eliminating the coolant lines from the throttle body. The throttle body area did feel much cooler with them removed.

Are you still running the egr? Are you sure that the system is fully functional?
If you have hot exhaust gasses running through the intake, the coolant should help to cool things back down.
Are you comparing both before and after coolant line removal @ full hot conditions, or atleast similar conditions?
I am not trying to argue, just want to understand what is really going on.

jason

18mustangs · Apr 13, 2006

onefstsnake said:
Sorry to bring a thread back from the dead...

The reason coolant flows though the TB is to keep the TB from freezing and sticking.

At the rate the air is moving through the TB it could freeze over.

Really only usefull during winter.

Are you serious? The coolent runs through the EGR spacer and not the TB. The purpose of the coolent lines is to cool the EGR spacer which is indeed a seperate piece and would lend considerable heat to the intake charge if not cooled. Also of note 93 cobras, and 94\94 GTs and cobras all have built in EGR spacers instead of seperate EGR spacers so they don't have nor need the coolent lines. The only difference between the built in EGR with no coolent lines and the Fox GTs with a seperate EGR spacer with coolent lines is the seperate spacer as all of the cars have TBs.

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