Throttle body coolant bypass

[SuperHO]

My 95 has this particular "mod" done, and after tearing apart the car when I was trying to wire open the secondaries, I noticed two coolant lines going in and coming out of the throttle body, which led me to wonder about some stuff.....

First off, knowing the V8's propensity to better throttle response and more power when the outside air's frosty, wouldn't it make sense to get that extra heat out of the intake tract by bypassing those coolant lines?

Second....any possibility of any aftermarket throttle bodies fitting on this thing since I happened to notice our throttle body's about the size of a toilet paper tube?

Discuss...

 

[Silvapain]

Bypassing the TB coolant lines is pretty common. Can't say I noticed any improvement when I did it though.

 

[SHOZ123]

I run air through mine that feeds the PCV system and the brake booster/EVAP manifold on the firewall.........

 

[E1 v2]

I run air through mine that feeds the PCV system and the brake booster/EVAP manifold on the firewall.........

I like this idea a lot, it takes the TB coolant delete one step further by keeping a little air moving through the TB to add whatever additional cooling it can.

From what I understand from the Cobra and Lightning boys, the coolant in the TB is actually for cooling on more traditional V8's. The coolant is run through those TB's as a necessity, I'm told. Kind of a "vestigial organ" on our cars due to the rubber boots isolating everything, heat wise.
Our TB's are isolated by the rubber "Boot" to the surge tank. Most Ford V8 motors, the TB BOLTS to the intake and gets a LOT of heat feedback from the EGR when it opens. They NEED the coolant to keep temps DOWN, unlike our cars. When they disconnect these lines, TB heat gets out of hand and hurts performance.

Anyhow, I think that's why WE have the silly feature there where it doesn't make much sense.

 

[Silvapain]

EGR? WHO uses EGR?

 

[E1 v2]

EGR? WHO uses EGR?

Those of us subjected to the emissions ****'s. :cuss:

I've found a way to hook it back in on the SHO R.T.S. Eaton M90 car. AND I even passed emissions a couple of weeks ago - - - I'm so proud!:woohoo:

 

[SuperHO]

Paul...does that re-routing of the lines make any difference? if so, how the **** do you do it??

 

[NebraskaSHO]

Can I see pics of this set up?

Both of Daniel's and Erics. Eric if you don't host pictures, PM me and I'd like if possible you to just email me them or something.

I don't want the EGR or the TB cooler if it's not necessary. No we don't have emissions out here, we still get around on horse and buggy.

 

[Mr Anonymous]

Just remember what the TB coolant circuit is ultimately for: to prevent icing on the throttle plate.

The right combination of temperature and moisture can cause ice to form on the throttle plate resulting in a stuck throttle. Numerous instances of this happening were blamed for several deaths when fuel injection started appearing on more vehicles. That's when manufacturers started adding a coolant circuit through throttle bodies to keep the temperature up.

While it's certainly rare, with a "perfect storm" of the right temperature and atmospheric conditions along with a steady throttle position for an extended period it remains possible absent any moderation of the TB temperature.

While I don't think anyone has ever proven that removing the TB cooling makes one bit of positive difference on an SHO, I usually recommend to anyone who lives in a part of the country where temps regularly fall below 40*F and chooses to by-pass the circuit to re-connect it for winter. I know a number of people who have bypassed it and ran like that for years without problems, but it's just something to take a few minutes to think about.

 

[SHOZ123]

Over the last 20 or 30 years I have deleted the preheating of the intake in one form or another. Only one time did I have an issue. That was with a TR7 Triumph with the Stromberger side draft 1 BBL carbs that had a slider thigamagiggy in them. One time during a uniquely cold and 100% humidity situation did the slider start to freeze and slow the car down. I shut off the engine and the latent heat thawed things out in about 5 minutes.

Never had a problem on a typical throttle plate vehicle.

 

[Silvapain]

This is what I did to remove the EGR (and SAI) system. The Gen 1 SLO Vulcans didn't have an EGR system, but the UIM was cast to accept one in the future. They made an aluminum block plate for the EGR that fits perfectly on out UIM, and with a little hogging of the holes it also fits the plate on the exhaust manifold. Cost me $5 for two plates from the local junkyard.

For the SAI system I took the OE flared to MIP adapters on the manifolds and cut the flared end off and tapped it to accept 1/4" galvanized plugs.

 

[mdshos]

Over the last 20 or 30 years I have.........

I had the problem on a 2800 cc german ford motor. The manifold and plate had been machined to accept a Holley 500 2 bbl. The cam also had a nasty amount of overlap. It regularly iced up in the winter.

 

[SHOZ123]

I should add that I now do not draw the PCV makeup air through the TB but just what ever is used by the manifold on the firewall. I run a sealed crankcase on the intake side. Run the exhaust line from the oil separator through a condensation can, then to the PCV valve into the intake. Reduces the nasty sludge down to about 0.

 

[SuperHO]

I'd have to get a tune to run without EGR, wouldn't i? Unless, of course, I don't care about the SES light, which doesn't work on my 98 ANYway...

 

[Silvapain]

I'd have to get a tune to run without EGR, wouldn't i? Unless, of course, I don't care about the SES light, which doesn't work on my 98 ANYway...

Yes, you will get a DTC if you remove the SAI or EGR systems without a tune.

 

[SHOZ123]

In the days before the Xcal2 I used a 24V bulb for the SES. Still do but seldom get a SES anymore.

 

[Earthshaker]

This is what I did to remove the EGR (and SAI) system. The Gen 1 SLO Vulcans didn't have an EGR system, but the UIM was cast to accept one in the future. They made an aluminum block plate for the EGR that fits perfectly on out UIM, and with a little hogging of the holes it also fits the plate on the exhaust manifold. Cost me $5 for two plates from the local junkyard.

For the SAI system I took the OE flared to MIP adapters on the manifolds and cut the flared end off and tapped it to accept 1/4" galvanized plugs.

Where did these pics go???
So many pics in these threads are missing!!!

 

[SHOZ123]

I cut the SAI fitting flare off then tapped and used a 1/2" bolt to plug the hole. Here is a picture and it also shows the EGR block off plate on the exhaust manifold.

 

[Silvapain]

Sorry - reorganized my photobucket account a while ago.