Coolant Bypass?
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Joined: Jul 2004
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Coolant Bypass?
What effect does the throttle body coolant bypass kit have on performance? Heard several of you talk about it, but not in detail of its benifits. I figure it lets cooler air go into the intake. Does it make a noticeable difference?
Team Owner
Joined: Mar 2001
Posts: 21,325
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
HAHAHAHAHAHAHA 
the throttle body digests 600 cubic feet of air a minute 10 cubic feet of air a second..if the ambient temp is 90 F, how low does the throttle body have to be to lower the ambient temperature 10 degrees in a second..a ten degree drop in air temperature will equate to 1.3 hp gain.. the air at 600 cubic feet a minute is not in the throttle body long enough to effect the temperature of the air.. if the air coming in is 90 degrees, it would instantly have to go from 90 to 80 to get 1.3 hp gain.. the 1.3HP per 10 degrees is a well know formula for effecting corrected dyno numbers.. removing the coolant from the throttle body will take it from 190 F to maybe 160 F. Digesting 90 degree ambient temp air will not drop to 80 degrees when it hits 160 degree throttle body. the reason you car feel so much stronger in the winter is because the air coming in is 20 or 30 degrees ambient as oppose to 90 to 100 in the summer.. 70 degrees of ambient temperature difference equates to almost 10 hp gain.. when the air hits the throttle body at 190 or 160 it has no effect on the density of the air , because it isnt in there long enough..
the throttle body digests 600 cubic feet of air a minute 10 cubic feet of air a second..if the ambient temp is 90 F, how low does the throttle body have to be to lower the ambient temperature 10 degrees in a second..a ten degree drop in air temperature will equate to 1.3 hp gain.. the air at 600 cubic feet a minute is not in the throttle body long enough to effect the temperature of the air.. if the air coming in is 90 degrees, it would instantly have to go from 90 to 80 to get 1.3 hp gain.. the 1.3HP per 10 degrees is a well know formula for effecting corrected dyno numbers.. removing the coolant from the throttle body will take it from 190 F to maybe 160 F. Digesting 90 degree ambient temp air will not drop to 80 degrees when it hits 160 degree throttle body. the reason you car feel so much stronger in the winter is because the air coming in is 20 or 30 degrees ambient as oppose to 90 to 100 in the summer.. 70 degrees of ambient temperature difference equates to almost 10 hp gain.. when the air hits the throttle body at 190 or 160 it has no effect on the density of the air , because it isnt in there long enough..
Last edited by Evil-Twin; Oct 5, 2004 at 06:49 PM.
Melting Slicks
Joined: Mar 2000
Posts: 2,975
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From: Northwest Iowa
Seriously, No noticeable difference, but for the cost of doing it (none), why not do it.
I don't ever drive my car in cold weather, and the reason for the coolant line was to warm the TB so moisture would not ice up on the TB and enter the intake.
I don't ever drive my car in cold weather, and the reason for the coolant line was to warm the TB so moisture would not ice up on the TB and enter the intake.
