Chuck chuck.

 

hahaha i just did the same thing the other day, we did it to my buddies t-bird w/ the 4.6 and my 5.9, i knifed my butterfies, but he didn't

 

should have madeyour friendknife the butterflies[8D]

 

he has a ford, uk how they think...they don't ; )

 

olsen.. have you rinstalled it and what your your remarks after the mod?

 

yea the mod motors are just a tad diffrent.

 

I have installed the TB, initial reaction says throttle response is drastically improved. i reset the pcm as well, so it's still relearning everything. plus i have another car i drive most days, so it'll take a while to burn through this tank. one thing i did notice, along with the 14x3" round air cleaner i installed 2 weeks ago, the engine is quite a bit louder under load. sounds a lot beefier than the stock setup

on a side note....if my truck has been given the death flash...what is the WOT 1-2 shift point supposed to be? if i hammer the pedal to the floor, the tach will barely touch 4300rpms, then shifts. so far i've found 3 dealership stickers under the hood that refer to pcm reprogramming....all with different dates [:@]

 

I did pretty much the same thing to a spare throttle body I bought a month or so back. Well worth the 2 hours I had in cleaning it up, I'm not knocking Fastman products at all but for someone on a budget its cheap power if you've got the time. The venturi effect is for carbureted motors anyway, so having venturis in a dry throttle body makes no sense at all, bore it out to what it should be.

 

The US Patent explains why the venturi is below the throttle plates.
It is there to make the cruise control work more smoothly.
With the venturi there the cruise control solenoid can get a 1% increase in power for a 1% change in throttle position. This alows the cruise control to hold a speed steady, and not 'hunt' 2-3 mph up and down as the highway grades change.

Keep in mind that the air coming into the throttle body does not come straight down. There is a 90 degree elbow on Rams and a 'airhat' on Dakotas. The air horns are there to help the air turn. When someone shows you flowbench data on a ported throttle body, a smart buyer will then ask: "Did you test this throttle body alone where the air will come in straight down, or did you put the airbox and filter on it to be more realistic?"

The Devil is in the Details

One other fact that is worth noting:
The Magnum throttle body was designed for the 5.2 V8, which was the 'base' engine that came out first.
So were the Magnum 'beer barrel' intake manifold dimensions,
the original Magnum cylinder head ports and combustion chamber (not the later RT heads),
and the 3.55 differential and 0.69 overdrive ratio.

So it is correct to say that the 5.9V8 needs a slightly higher volume flow throttle body.

 

and the more mods you do ie: ported heads intake cam flash pistons exhaust ect... with call for a bigger throttle body