i just got a 95 z from a guy i don't think knew too much about the car there were vacuum lines disconnected and sensors unplugged. I've already made a parts list to what i would need but there is just one thing i saw that made me wonder. the cooling line that goes to the throttle body is bypassed just to where it's supposed to come out is there a reason for this? any help is great thanks.

 

are you really in GA? If so, it's fine. The prior owner made that mod because it adds 162.89 HP.....nah, just kidding but some folks believe it adds performance

 

More like 0.16289 HP. lol

 

ok so that cooling line does not have to be hooked up then. how would that make any more hp?

 

Removing the coolant lines from the throttle body is called a free mod, and you know what you can expect for free. The theory is that the cooler throttle body will heat the incoming air less and the engine will make more power. The reality is that the incoming air is only in contact with the throttle body for a few milliseconds before it gets swallowed by the engine, and has little or no chance to pick up any heat.
The reason for keeping the throttle body warm is to prevent ice from forming in it during cold humid days, and giving driveability problems

 

umm, it doesn't

but, let's explore theory for a minute

have you ever noticed that your vehicle seems to make more power in the cooler weather vs 90 degree days? Well, that's because it does. A cooler air supply is more dense and thus calls for more fuel and thus more power.

That is the concept of cold air intakes. It's not just the air which makes the power, it's cooler more dense air and the computer adjusts and thus more power is created.

the concept of running "hot coolant" (now that's an oxymoron) through the throttle body is that in cold environments it prevents the throttle body from freezing up, or is it for emissions? Anyway, you now are introducing heated air into the intake but cooler air is better. So, the thought was that bypassing the throttle body must make more power but alas, this thing called heat soak occurs under the hood and that stock air box is restrictive so you are sucking in hot air anyway with or without the bypass.

So, the real gains come from a CAI with the pickup tube as far away from the engine as possible and on the 4th gens, theat tends to be aimed down behind the drivers headlight.


there are plenty of good books at your local library that you can take out for FREE which explain the basics of 4 cycle internal combustion engines. I suggest that you get one because that theory doesn't change whether it's a Honda Vtec or an LS7

understanding the theory will also prevent you from silly questions in the future such as "I heard that backpressure is good etc etc"