What Have You Done To Your 2nd Gen Tacoma Today?

Nice I installed 4runner mirrors with heat, turn signal and puddle lamps, well worth the price I paid for them. Got them all wired up and the top covers painted silver, bottom is still black to keep the black on silver look you are referring to.

http://www.ebay.com/itm/31072432709...iewitem=&sspagename=ADME:L:OC:CA:3160&vxp=mtr

 

This is why it is a bad idea to bypass your throttle body coolant line:

First, we need to make some assumptions. The first set of these assumptions deals with the operating condition of the engine. Let’s assume that we are running the engine at full throttle at 4,000 RPM. We have a 3.0L engine that is efficient and has about an 85% volumetric efficiency. Our effective engine volume is 0.85*3.0L or 2.55L. Since we have a four stroke motor, we are pulling in 2.55L of air 2000 times a minute. Therefore we are ingesting 3.00 cubic feet of air per second, after unit conversions. Our throttle body’s inside diameter is 2.5 inches (D) and its total length is 2 inches (L).

The second set of assumptions deals with the air and coolant flowing through our throttle body. Let’s assume that we are pulling in air from outside the engine bay on a warm day. Our intake air is 80 degrees, Fahrenheit. At 80F and 1 atmosphere, air has the following properties:

Density (p): 0.0735 lbm/ft^3
Thermal conductivity (k): 0.01516 BTU/hr*ft*F
Kinematic Viscosity (v): 16.88*(10^-5) ft^2/s
Specific heat (Cp): 0.24 BTU/lbm*F
Prandtl Number (Pr): 0.708 Unitless

Let us also assume that our coolant is 280F and that our throttle body is not cooled significantly by the incoming air. That is, the surface temperature of the inside of the throttle body is always 280F.

Now we will figure out how much and how fast the air is entering the engine. Through simple calculations, knowing the throttle body dimensions and volumetric flow rate and the density of the air, we can find out the mass flow rate and velocity of the air entering the engine. These values are found to be 794 lbm/hr (m) and 88 ft/s (V).

We now need to know if the flow of the air is turbulent or laminar. This will allow us to determine what appropriate equations to use later. First, we need to find the Reynolds Number (a unitless number that allows one to know if the flow is turbulent or not). This is found by the equation:

Re = V*D/v

We find our Reynolds Number to be 110,000. This is definitely turbulent flow! (Anything over 10,000 is defined as fully turbulent flow)

We need to find our entry length, or the length of tubing needed for the flow to become fully turbulent. This value is defined as Lh = 10*D. This value is found to be 2.08 ft. This is acceptable, since there is, most likely, two feet of piping between the throttle body and the air filter.

Since our entry length is less than our actual piping length, we can use Dittus-Boulter equation to determine the Nusselt Number (Nu):. (Sorry about all of this name dropping)

Nu = 0.023*Re^.8*Pr^.4 = h*D/k

We find our Nusselt Number to be 214. The ‘h’ value above is the average heat transfer coefficient. Now, we can actually find the temperature of the air coming out of our throttle body. Solving for h in the above equation yields h equal to 15.58 BTU/hr*ft^2*F.

By using Newton’s law of cooling, where the rate of heat transfer (Q) is determined to be:

Q=h*(area of heat transfer)*(Surface temperature-Medium Temperature)

By using differential equations, natural logs and some other hocus pocus, we get the following equation:

Texit=Tsurface-(Tsurface-Tinlet)*exp(-h*A/m*Cp)

Finally, by using the above equation, the outlet temperature can be determined to be 81.3 degrees Fahrenheit.

Now, using the SAE J1349 correction factor, you lose ~1% of your total power for each 10 degree increase in inlet air temperature. With this 1.3 degree increase, due to the throttle body coolant, you are losing 0.13% of your power. Or, on a 200hp car, you are losing 0.26hp. By overriding the coolant flowing through your throttle body, you are risking having your throttle body freeze open in cold weather (the whole purpose of running coolant through the throttle body in the first place). Hope this clears up any confusion.

Sounds like someone did their homework. Even after reading this for some reason I still want to do mine! Maby I just like doing mods

 

Yeah let's be honest......

I didn't read all that.

But here's my thoughts.
HORSEPOWER! Hahaha

 

You have what I originally wanted to do. I even saw someone else do the exact same thing here on TW. Just trying to keep it cost effective, but that price is tempting. I'm watching that product on eBay. Thank you.

 

Me too thanks!

 

I didn't buy the actual oem switch for heated mirrors, was too expensive up here in canada(Over $100). Kept the install price down by using a generic switch I mounted in a knock out beside the steering wheel.

Some aftermarket 4runner mirrors do not mount up directly to the L bracket on tacomas, these ones off ebay had the exact same mounting inside the L bracket making for an easy install.

 

Do the puddle lights auto light when you get close to the truck like a T4R? If so, did you need to change FOBs to make it work?

 

No they only light up when you unlock the doors, I have them wired to the dome light, so they gradually brighten when unlocked. Replaced the bulbs with some led bulbs.

I would imagine if you installed some type of keyless entry that unlocked when you got close it would do the same thing.

 

I finally installed my OEM roof racks, tbh it was more of a bitch than i expected but it turned out nice and flush

 

To hell with the Mods Dude...you need to be selling these mechanical engineering dissertations to second year students at MIT....I needed a sandwhich, and a fucking nap after reading the first three lines...#NusseltWutTheF #ReynoldsWrapWho

 

Cool, thanks.

 

Not that rooster claimed to write that but its a c/p from a mazda forum

 

Yeah that's about how I felt..
What have you done to your Tacoma today? Well I gave it deep thought and expressed my feeling in it through an exponential growth of logistics and synergy. To this end I found that the reclassification of certain parts to new forms, aka mods, proved inexplicably and rigoursly beneficial to my needs of horsepowerization and.....
Yeah I'm running out of big words and my head hurts

 

Lol!

 

My new Weather Techs arrived today! But they are a Christmas gift, so I cant open them until then

 

G Tek Fab powdercoated door sill protectors installed. Great product.