could you please explain how one can benefit from this; i read the faq an was curious to hear from those who have done it.

also, is their any better way than the way it's described in the faq?

 

The purpose is to not pass hot coolant through the TB and so reduce the temp. of the TB, plenum, runners, etc. This tends to allow cooler air into the engine and so more O2 and more power.

 

on dyno pulls it showed no diff

 

I think It's worth doing just to get rid of some more crap in the engine bay. Most aftermarket TB's don't come with coolant ports anyways. It's a simple procedure. Either link the two hoses coming off the TB with a coupler or run a new hose from the intake to the heater core to make it look clean. Your choice.

 

i see, except for cold weather purposes; does it serve a purpose? if it doesn't have any benefit what's the point of having or removing?

 

I think I'd leave it.

 

I would have done mine sooner. I live in Ohio way north and I had had zero probs. I would not even consider having coolant through my TB unless I had some sort of freezing issue. I could feel a difference.

 

Yeah, unless you live way up in Canada and see some serious sub zero temperatures I wouldn't worry about it.

 

I don't drive my car in the winter so I decided to do it when I had my TPI system removed this winter. I haven't noticed any gains, but I didn't really expect too. If your bored or you happen to be doing work on the car anyway than I would say go for it. But I wouldn't go out of my way to do it though.

Here's how I did it...not the greatest pic, but I guess you can get an idea...

 

I did mine and am glade I did it, I can take the throttlebody off and plenium with out the coolant issue. I plan on taking it apart soon for my new runners and when I match port them. just one less hassle. I went to auto zone asked to take a look at there preformed heater hoses walked back there found one with the right bend cut about an inch or two off one end and it was a perfect fit. got it cheep too I think less than a dollar?

 

bypass it, bypass it now!!!

 

I did mine and would recommend it as well. I live in Utah and even with the widerange of temps here (-20 to 90+), I have never had a prob with it. Just for the ease of accesing the TB for removal, it's worth it in my opinion.

lates,
JD

 

Just be careful if you decide to use a coupler. i tried a plastic coupler from Westlake and it had too small of an ID (inside diameter)...First time I got on it, the pressure was too much and blew the coupler clean out of the hose, spraying coolant everywhere.

 

yes, but what did you actually gain.......doesn't sound like much; why do they consider it a "free" mod if it doesn't offer much?

 

I also did the TB bypass and I think it was worth it simply because that's one less hose to replace, quicker removal of the TB, and looks better. Did I notice a difference? Can't say that I did but it must have helped some considering the air isn't heated by the warm coolant like anymore. Even if I just gained 5hp that's 5hp I didn't have before and with 5HP here and there can add up to some nice gains in HP. I've had mine done for about 2years with temps between 5-100degrees with no problems even in the winter.

 

I couldn't tell any difference but it was easy to do. I just used a piece of copper pipe and two hose clamps.

 

Well this guy can't be Completely in performance never-never land.

Do it, DOn't Do it, ITs your choice. Isnt going to really Matter. If your coolant is Hot enough to superheat the intake charge, you have got other problems.

But if you Do it, MAKE SURE you list it in your list of Mods.

Tb Bypass

Right above your

!AIR

and

!CAGS

That way people will know, you really are THAT HARDCORE.



________________
-=***** Mods Racing=-
!AC
!Cags
!EGR
TB Coolant Bypass
Custom Camaro Keyfob

 

I second that.....one time i tried doing a free mod to my car but it wasn't free enough

 

CAGS?

 

Hey, first post! Welcome to the club!

 

I had a mechanic pretty much tell me I was stupid for bypassing my tb. He said its purpose wasn't just to keep the tb from freezing in cold temps, but that ice can form on the butterflies in any kind of weather. He said that the rush of air flowing at that velocity can cause condensation and ice to form on the buterflies, and the tb needs to be warm enough to prevent this from happening. Is his argument valid or is he just full of s@#%?

 

Bypassing the throttle body will not increase power. Dynos have shown it time and time again. I watched the dyno pulls myself because I didn't believe it. No power gain.

Looking to make removing the TB easier? Then do it. Looking to make power? Look elsewhere.

Think about; on a "warmed up" engine, do you really think the TB and plenum etc is less than 185 degrees? (My water temp). Yeah I guess if your water temp was 235+ and your engine was ice cold and you didn't have a hood (to trap the heat as the engine made power) then yes you'd make more power. But how often does that happen? If that's the case then you need to do something about your water temp and get a hood.

Oh - and yes, your mechanic is right about the rushing of air causing condensation and freezing blah blah blah; but that only happens in northern Canada during a cold winter.

 

OK, touch the plenum on a car with no bypass. Then touch mine after 1 hour of driving. Mine is around ambient, the other one will be hot! Why do you think peole ice their plenums!!

 

i believe it will only benefit in certain cases. take my vette for example. at the track between runs i allow the engine to cool with the hood open and the intake iced. when i make my runs, my coolant is usually in the 160 - 170 degree range. now factor in my 160 degree stat. since the coolant is flowing through the stat at this temp as im racing, i would want to redirect it from the iced down throttle body instead of letting it heat it up. in street driving a throttle body bypass would be worthless. but at the track it would have some benefits.

 

Thank You!

 

Depending on where you live, you will see different results. On 115* + days in Phoenix, in rush hour traffic...the TB bypass DOES make a difference in power.... Having a heat soaked plenum works on the MAT sensor (one reason people relocate those too), and the ECM will adjust accordingly. The hotter your intake temps are perceived to be by the ECM, the leaner it will make your mixture, which usually results in less power.... So in that case, less heat = more power.

On a dyno, with everything just being warm, or cooled off between runs, it would make NO difference. Now...do the same dyno runs after getting your car up to full temp in 115* weather, and idle it for 20 minutes and then tell me that it makes no difference.

My bypass:

 

Ok, if anyone else would like to restate the facts presented in this post feel free to just yell them at your computer screen.

 

What he said

 

not sure i got it, what's it do exactly i'm a little confused.

 

I guess ya just have to spell it out for some people...yah?

 

Wow this one degraded somehow w/o me noticing....

 

LOL. Ed you're the computer guru here. Mind explaining this and it's effects on ECM?

 

What the hells that mean? Do you know me? No, thanks though.

 

it's funny, you ask a simple question and it becomes this............

makes you think sometimes.

 

Yeah look at what you started!

 

My opinion will echo like Bort's. Just go ahead and do it. If you don't want to, don't. It's that simple. I did mine, and so do most other people. There's no real negative to it, likewise, there's not much positive either excpet it makes heater hose routing nicer and eliminates some connections that could leak.
If you really have a hard on to get scientific, Glenn91L98GTA made at least a couple posts regarding his findings on MAT vs TB bypass. That would really be getting into the espteric though. As in the airfoil debate, there is just no point in wasting time thinking about it.

 

I think Ed just said it best. It's one of those mods that if you're bored, or in my case had everything apart already, then go ahead and do it. But I wouldn't go out of my way to install it though as the gains if any are minimal. And just and FYI...I've had my car out several times in 0* weather and the TB blades never froze with the bypass.

 

Thanks Irocker for restating everything that has been said and then said again. Don't take this personally, b/c you are just the scapegoat I am using for demonstration. Any other reiterations??

 

So basically It's one of those mods that if you're bored, or in my case had everything apart already, then go ahead and do it......

 

It doesn't make any difference. Do it if you're bored.

 

lol