Performed TB coolant bypass...

DrunkenMonster · Post by **DrunkenMonster** » Sun Nov 15, 2009 10:46 pm

Disconnected both hoses. Went to auto parts store and bought a coolant connector. Clamped both coolant hoses together. Very easy modification, Noticed slight improvement.

djb383 · Post by **djb383** » Sun Nov 15, 2009 11:19 pm

You may want to reconsider the bypass, especially with winter coming on. It's been posted on the Internet that coolant is plumbed around the TB to heat the incoming air. That is NOT the engineering design and is a myth. The purpose is to prevent ice from forming on the backside of the TB butterfly, which can interrupt air flow when open and cause the butterfly to stick partially open at idle. Under certain conditions, ice can form in the TB even during summer months. Again, the coolant does not heat the intake air as the air passes through the TB much too quickly to become heated.

DrunkenMonster · Post by **DrunkenMonster** » Mon Nov 16, 2009 4:16 am

So then why does this particular engine have it and other engines don't use it say for instance the Ecotec?

djb383 · Post by **djb383** » Mon Nov 16, 2009 4:52 am

Can't answer that but other engines do use it. Our Saturn Vue V6 (Honda VTEC) has it as well as GM LS engines. Our 5.7L Tundra had it, IIRC. Even our old '92 5.7L Chevy P/U had it.

djkeev · Post by **djkeev** » Mon Nov 16, 2009 5:20 am

Do some research on Carburetor Icing. The airplane forums have a lot of information for this is a very serious issue when 1000's of feet in the air! On land, the car runs poor or stalls, big deal! No offense intended but people a lot smarter than you (I assume, don't know you) and for sure smarter than I have spent a lot of money not only to design but to construct and install this in your car. Believe me, it wasn't done just to irritate people! Some design work is to shut the Feds up with emission regulations though. There hasn't been much worse than the old air pumps during the 60's and 70's to screw up a car.Think twice about this mod.Dave

TONY TAT2 · Post by **TONY TAT2** » Mon Nov 16, 2009 8:24 am

Had a 65 mustang with it,only on the 6cyl's tho. I by pased the1on my 85 vette.

Sublimewind · Post by **Sublimewind** » Tue Nov 17, 2009 6:52 am

My subie uses a coolant charged TB... it's silly for high performance guys to run it, but on a Vibe, the difference is negligible.. Especially on my car as it's not DD'ed.. I've bypassed it, but I won't be driving in the winter either.. On my car I didn't even need any fittings, I just removed one hose, shortened the other and popped it on the other fitting with the factory clamp... 5min max, zero cash... lol..

joatmon · Post by **joatmon** » Tue Nov 17, 2009 9:23 am

I know of at least one person here who installed a CAI, then got surprised by water, hydrolocked, and subjected the car to Sudden Engine Death Syndrome. In spite of that, CAIs still seem to be a very common performance mod. An objective observer might think that deliberately putting such a SEDS likely device on a car is lunacy, but it's popular. By comparison, the risk of a little incovenient intake icing seems trivial.

L5K · Post by **L5K** » Tue Nov 17, 2009 1:09 pm

Problem solved. Just install a dehumidifier under the hood.

djb383 · Post by **djb383** » Tue Nov 17, 2009 11:56 pm

If a rough idle and/or poor engine operation/performance could be attributed to TB icing, it might not be considered trivial.

VforVIBE · Post by **VforVIBE** » Wed Nov 18, 2009 12:46 am

Quote, originally posted by joatmon Â»I know of at least one person here who installed a CAI, then got surprised by water, hydrolocked, and subjected the car to Sudden Engine Death Syndrome. Didn't he do that like 2-3 times? Quote, originally posted by DrunkenDixie Â»Disconnected both hoses. Went to auto parts store and bought a coolant connector. Clamped both coolant hoses together.I hope not in that order I did the TB bypass... no ice yet.

djb383 · Post by **djb383** » Wed Nov 18, 2009 2:28 am

How do you know? Have you looked on the backside of the butterfly that's inside the TB while the engine is running?

VforVIBE · Post by **VforVIBE** » Wed Nov 18, 2009 2:57 am

Quote, originally posted by djb383 Â»How do you know? Have you looked on the backside of the butterfly that's inside the TB while the engine is running? It's Florida, we have a law about ice being anywhere other then in our drinks, it's just not allowed.

DrunkenMonster · Post by **DrunkenMonster** » Wed Nov 18, 2009 5:57 am

I drove my truck sorry for any confusion...

vintagegz · Post by **vintagegz** » Wed Nov 25, 2009 9:11 pm

The worst thing is on a humid/damp day on the highway your throttle can ice up, any season, and when you lift off the accelerator pedal the car keeps going, very dangerous. I can see the mod if you are racing and want a miniscule edge, but poor choice on the street.

djb383 · Post by **djb383** » Thu Nov 26, 2009 8:18 am

+1........Use your thumbnail to let air out of an inflated tire and feel how quickly your thumb will get cold, even when it's hot outside. Same principle is at work.....air moving rapidly from higher pressure (front side of TB butterfly) to lower pressure (back side of TB butterfly). Again, the circulating coolant warms the metal in the TB (not the incoming air) to prevent ice from forming on/sticking to the back side of the TB butterfly.

djkeev · Post by **djkeev** » Thu Nov 26, 2009 8:04 pm

Quote, originally posted by VforVIBE Â»It's Florida, we have a law about ice being anywhere other then in our drinks, it's just not allowed. Ummmm, I recall being in Florida, Palm Beach area, a few times waking up to an ice covered world!! Must only be illegal on the West Coast??Dave

djb383 · Post by **djb383** » Thu Nov 26, 2009 11:20 pm

Yep, and IIRC, the NASA dudes (in Florida) take ice and icing conditions seriously.

Sublimewind · Post by **Sublimewind** » Fri Nov 27, 2009 2:13 am

I'll risk the ice, thanks... lol..

djb383 · Post by **djb383** » Fri Nov 27, 2009 10:50 pm

What is that.....a Transformer? LOL

Sublimewind · Post by **Sublimewind** » Fri Nov 27, 2009 11:10 pm

Quote, originally posted by djb383 Â»What is that.....a Transformer? LOL Pretty much... lol..

Water boy · Post by **Water boy** » Sat Nov 28, 2009 1:04 am

The only items I can recognize are:RadiatorWindscreen washer fluid tankAlternator

star_deceiver · Post by **star_deceiver** » Sat Nov 28, 2009 5:34 am

Quote, originally posted by Water boy Â»The only items I can recognize are:RadiatorWindscreen washer fluid tankAlternatorWhat??? You didn't study? There's going to be a quiz on it later!

keithvibe · Post by **keithvibe** » Sat Nov 28, 2009 6:14 am

Quote, originally posted by djb383 Â»What is that.....a Transformer? LOL Quote, originally posted by Sublimewind Â»Pretty much... lol.. in to a pile of goo

djb383 · Post by **djb383** » Sat Nov 28, 2009 10:02 am

With all that tubing/piping maybe it transforms into a 5 piece brass band, or something.........playing music to Sublimewind's ears when he mashes the go pedal. Man that puppy blows.....get it. ROTFLMAO

Performed TB coolant bypass...

Performed TB coolant bypass...

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