Coolant through the TB?
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Requirements are high humidity, low temps, part throttle operation. As the air passes through the partially opened throttle plates, pressure drops, air cools and can/will cool the TB housing and blades. Incoming moisture freezes to those cold metal objects, then builds...and you have "TB Icing". It CAN happen, but I've never seen it in my 30 years of driving carb'ed, TBI and MPFI cars -all with their intake heating systems removed.One time I was driving over Monarch Pass in Colorado (11,300' elevation). It was at night, in a blizzard, I was driving my carb'ed Trans Am, with of course, the heat stove removed, theh cowl valve propped open all the time, and the exhaust crossover blocked. More hp, right?
Toward the summit, the car started to die out and have power issues. I was barely able to coax it over the summit and then I was fine all the way back down and on to Telluride. I was absolutely convinced; cold temps, high humidity (dumping snow), part throttle, not heating aids...I'd just experienced carb icing.
In reality, it was a clogged fuel filter and I was actually experiencing not carb icing, but "fuel starvation".
Last edited by Tom400CFI; Dec 21, 2016 at 11:21 AM.
Advanced
Joined: Aug 2016
Posts: 67
Likes: 3
Trade Off
All design is a compromise.
Intake systems on engines can ice. Carburetors on airplanes have a carb heat **** for that reason. I've had a carb freeze on a Jeep once and a motorcycle (Just let it sit there and thaw from the engine heat. I had to push the motor.)
The heated TB is for reliability reasons.
Intake systems are kept cool to maximize the intake charge so taking it off would be conducive to making more power.
Intake systems on engines can ice. Carburetors on airplanes have a carb heat **** for that reason. I've had a carb freeze on a Jeep once and a motorcycle (Just let it sit there and thaw from the engine heat. I had to push the motor.)
The heated TB is for reliability reasons.
Intake systems are kept cool to maximize the intake charge so taking it off would be conducive to making more power.
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
The one question I have is, is this WS6 an LSX engine?
As for why, I have seen this on many makes as well, it is just common tech to keep a TB from freezing shut if possible. I don't live where it is a problem, minus a few odd days of the year. I bypassed it on my l98 and LS6. I noticed nothing. Might try it on the Toyota, even though the other night the back window was caked with ice. I had to find the defroster button.
Last edited by bill mcdonald; Dec 22, 2016 at 05:42 PM.
Team Owner
Joined: Jul 2004
Posts: 28,424
Likes: 3,276
From: Hartford WI
Interesting. I would not think as much myself. Now this brings to question what would you gain if you could freeze the water in the bypass only? Seems like such a brief moment of air contact would be nothing as far as gains.
I bypassed it on my l98 and LS6. I noticed nothing. Might try it on the Toyota, even though the other night the back window was caked with ice. I had to find the defroster button.
I bypassed it on my l98 and LS6. I noticed nothing. Might try it on the Toyota, even though the other night the back window was caked with ice. I had to find the defroster button.
Why would you notice anything? Your SOTP dyno doesn't measure small changes and why would you rely on it to tell anything unless the change does something huge?
Instructor
Joined: Nov 2004
Posts: 230
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Pro
Joined: Mar 2004
Posts: 654
Likes: 18
From: Linthicum MD
Interesting. I would not think as much myself. Now this brings to question what would you gain if you could freeze the water in the bypass only? Seems like such a brief moment of air contact would be nothing as far as gains.
The one question I have is, is this WS6 an LSX engine?
As for why, I have seen this on many makes as well, it is just common tech to keep a TB from freezing shut if possible. I don't live where it is a problem, minus a few odd days of the year. I bypassed it on my l98 and LS6. I noticed nothing. Might try it on the Toyota, even though the other night the back window was caked with ice. I had to find the defroster button.
The one question I have is, is this WS6 an LSX engine?
As for why, I have seen this on many makes as well, it is just common tech to keep a TB from freezing shut if possible. I don't live where it is a problem, minus a few odd days of the year. I bypassed it on my l98 and LS6. I noticed nothing. Might try it on the Toyota, even though the other night the back window was caked with ice. I had to find the defroster button.
Last edited by BacknBlack; Dec 23, 2016 at 02:40 AM.
