coolant bypass pic. Options

[4-eyed-freek]

i found this pic that gives you an idea if anyone is looking to do a throttle body coolant bypass. i found it helpful so i hope it helps you guys.

[Robbie1902]

How do you go about doing this and what are the benefits?

[Johnnyny]

How do you go about doing this and what are the benefits?

a lot of ppl have done it and no hot coolant through the throttle body means colder air

[Robbie1902]

No i know that im just asking how to do it and whereabouts i should loop the coolant hoses

[4-eyed-freek]

where it says iac in the pic. take the two lines that go to the throttle body and with a double male fitting plug them into each other.
instead to taking the throttle body off what i did was take the intake off, then there is a little white box. remove that with a screwdriver. and take the clamps off that hold them on and pul them off.( warning let the car cool down before you do this or you will get a really hot shower. and even when the car is cool, there will be a small amount of coolant that will come out. nothing to worry about.)

[Robbie1902]

Haha thanks i looked at the pic again and was like wow im retarted i was looking at the writing and thought they were trying to do it down there and was confusing, i got it now thanks

[4-eyed-freek]

yup no problemo.

[luka]

know what size fitting that is?

[4-eyed-freek]

i used a 3/8. its was a really good fit. make sure not to get the plastic kind or else it could melt and cause some problemes.

[4-eyed-freek]

this is why i say do this when the engine is cool. ( this only happend because i went to push the line back into place becuase i didnt have any clamps on it.)... yes i know im stupid lol. all the red spots you see are now blisters.


This post has been edited by 4-eyed-freek: Oct 24, 2010 - 7:26 PM

[Remy]

The only REAL benefit you gain from capping off the hoses is it just makes taking out the IAC valve easier thats about it I shave 1min off my time when removing the IACV/Throttle body for cleaning.

[azian_advanced]

there is no gain in power by removing the throttle bypass lines and instead you'll get rough (low) idle on initial start ups. it's not worth it.

[Robbie1902]

It will help with heat tho, the less heat in the throttle body the better

[Bitter]

there is no gain in power by removing the throttle bypass lines and instead you'll get rough (low) idle on initial start ups. it's not worth it.

yes

It will help with heat tho, the less heat in the throttle body the better

no. long story short, air does not hang out in there long enough to pick up a measurable amount of heat. ANYWAYS, your intake manifold is METAL which will heat the throttle body by CONDUCTION.

[hatchy_gt-s]

YAY!!! Someone actually knows common sense! Thank you bitter.

While your at it take the thermostat out your engine will run cooler(@ highway speeds), and increases gas milage(@ highway speeds).

[Spider77]

Since we've gotten into this, I really want to see some numbers. Ive heard theories, about how every deg cooler=this and that. Time to get some temp readings. Guess what Im doing tomorrow at lunch? Although wont be all inclusive as im not taking exact reading of air temp, as opposed to TB temps. If I had an adapter and a temp gauge I would do that as well, but might as well work free to see if there is anymore to this!

[Hanyo]

Just a warning to those who live where it snows. Doing this will will increase the chance of your throttle become frozen open. That is the main reason why manufactures took the extra precaution of running coolant through the throttle body.

[4-eyed-freek]

how would it get frozen if there is not liquid in there? im just asking ..not to be a dick or anything, i just wanna make sure it doesnt happen. i have had other cars with throttle body's with no coolant running through them and i live in the upper part of michigan and had no problemes.

[Spider77]

Ok, so today at lunch, I took some temp readings (with a Fluke infared thermometer)
26 OCT 10 Temp Readings, With Bypass
Ambient Temp: 74.6
Cold Engine Bay/Throttle Body/Air Filter Temp: 81.5/80.1/74.9
@5 minutes running at idle.
Engine Bay/TB/Air Filter: 92.5/72.3/76.6
@10 minutes of running at idle.
Engine Bay/TB/Air Filter:131.9/72.9/77.9
So, tomorrow I will do this again with the coolant lines hooked back up to stock.

27OCT10
Throttle Body coolant lines hook back up to ports.
Ambient Temp: 77.9
Cold Engine Bay/Throttle Body/Air Filter: 97/92.6/86.8
@5 min running at idle.
Engine Bay/TB/Air Filter: 114.8/105.8/88.1
@10 min running at idle.
Engine Bay/TB/Air Filter: 141/117.9/91

This post has been edited by Spider77: Oct 27, 2010 - 12:08 PM

[Spider77]

Everything hooked all back up to stock....I'll post some numbers soon!

[4-eyed-freek]

awsome spider77 im looking forward to seeing these #'s!

[Spider77]

I updated the first post with numbers. I am in no way saying these results are conclusive. I really would like to find a way to hook up digital calibrated temp sensors to the TB and intake plenum, as well as the intake. Then either get on a Dyno (so I can roll in a controlled enviroment). If I can find a cost effective way to so this, I will. And then we can put to rest if the bypass has some relevance. Keep in mind, although I did not post it, the intake plenum was pretty much the same temp as the TB (save a deg or two)

[hatchy_gt-s]

The only prob. is thats the temp. of the throttle body not the air passing it, of corse the TB is going to hotter thats the point of the system. What you need is an Air Temp. sensor to take the reading of the air passing the TB.

This post has been edited by hatchy_gt-s: Oct 28, 2010 - 11:22 AM

[Spider77]

Yes, I know this. That was the whole point of the external temp readings, if it was only a few deg of then why bother (and the bypassed TB was a pretty even temp, while the stock set up rose in temp), but a decent amount means I wouldnt mind investigating further. I've already started to look at some temp sensors and I have an old TB laying around that I can grind up and use as an adapter. I would love to put one in the plenum as well, but that would require an extra one (which I dont have).
But, like I said, I read that people say it works, or that its a waste of time, with no real way to back up either claim. Save for one I saw on LS1 Tech where a guy did benefit from it. Instead of taking a huge jump, getting it all set up, dyno, etc...Im going to do it in small steps and go from there. Maybe it works, maybe it wont, one way to find out.

[Bitter]

if it really made any difference, you'd think that they'd have the IAT inside the intake manifold and not out by the air filter.

[Spider77]

Hell, I see a lot of stuff that dosent make sense, but its still done that way. I'm not an engineer.