Would a TB bypass net me any rwhp??

 

1 or 2 but evey hp counts

 

What is the best way to bypass it, will it cause any possible problems? (by best way, i mean, should I loop it, or cap it off at both ends, loop it right?

 

No problems unless you live in sub zero conditions (tb could freeze up).

I believe www.InstallUniversity.com has a write up on it.

 

Dont spray either

 

I capped mine off at both ends. It doesnt matter which way you go, but capping is easier, and it won't hurt anything.

 

Ok, just wondering if that water is supposed to GO somewhere, or if it was just shunted off from the main flow to ONLY hit the TB and then return to the main flow later on. I really should jsut go look at it.

 

Do not cap off the ends. That line is not only there to prevent the throttle body from "icing" over, but it acts as an air bleed for the coolant system.

 

If you are somewhere where you dont have to worry about it freezing....do it.

 

How is that an air bleed? There is no valve to let any air out, and bleeding the air out is mainly needed when you do a cooling system flush or fill a cooling system. My old Lumina with the 3.1 had an air bleed mainly because of the lines complex routing. Not all cars have one.

The icing over thing is no problem for me cause I don't drive it in the winter.

 

That's fine if you want to cap it off. Won't be the first time someone hasn't taken my advice. The official GM parts name is the coolant air bleed hose. The pipe that connects both heads is known as the coolant air bleed pipe. It's there for a reason.

 

Like said above. The cross over tube needs to be attached to the radiator. That tube is a air bleed off point on top of the heads.

You can take the TB out of the coolant loop, but it still needs to connect to the radiator for a bleed off point.

 

what do u mean by sub zero temperatures? is it better to wait for after winter? i live in jersey.

 

wait you dont wanna do it if your spraying? im asking because nitrous is in my future plans

 

TB Bypass will not effect performance in a negative way. All you are doin is takin the hot coolant fluid out of the TB. It was originally put on there to just keep the TB from freezing. The bypass will NOT change the TB operation.

There are too many members on here to list with bypassed TB & sprayin. My buddy has a 99' Z28 w/BBK TB & the bypass done w/dry 100 shot. Been dynotuned & there are zero problems.

Nitrous is fine with the bypass done.

 

I drive in Philly year round and I have never had any problems even in winter with the TBB.

 

I have no problems with cold weather here in Indiana. Car performs fine. Just do it!

 

At first glance the theory behind it says yes you should. But in reality and a more indepth look says you probably won't.

The air moves thru the TB very quickly at WOT so will have little chance of being heated. Having said that, the heater in your car works on that very principle by passing cold air past the hot coolant water.

But the difference is the air flow of the heater is very low compared to that of the engine at WOT. And on many cars the heater appears to be less efficent at the high fan speed setting compared to the low, this proves the point that the air needs to be in the hot environment for some time to heat up.

A heated TB has 2 uses that I can see (probably only one being genuine).

1. To prevent freezing of the TB blade - this is very unlikely even in extreme cold. This is probably some what of a folk law mith, created by people who wheren't sure what the coolant fluid was doing going through the TB.

2. Much more likely is it exists for fuel economy purposes.

We all know cold air is good for power, but hot or warm air is good for fuel efficency.

At light throttle, the intake air will move much slower through the TB, thus allowing it to be heated slightly, this then promoted better cruise economy.

At WOT (wide Open Throttle) the air will move to fast through the TB to really be affected, thus having minimal affect on WOT performance.


The only thing it may help is if the motors being running for a long time then the TB will become heat soaked, however if the TB is mounted to a metal intake manifold (as I think it is on a 302ci) this will hardly matter.

The only way to really tell is to fit an air intake temperture sensor inside the intake manifold and see whether the intake air tempertures reduce with the TB by-pass. If it does then a small gain may be seen. If it doesn't affect the IAT then it will make ZERO more bhp.

If you're bored or really want to do it - I say go for it. Just don't expect to feel the difference.

Else it's not worth it. The only reason I'll alter it on my Z28 is if I fit an after market TB which doesn't cater for it.

 

I resurrected this thread to ask a question.and to make an observation

I did the mod last week an can swear....that my throttle response is better...just response..Im not making any HP claims but when I "blip" the throttle between shifts...it responds MUCH better...anyone else experience this...Or does my medication need to be changed...

 

Check your meds