Okay, I understand that this is a thread on the 3.9L however I'm also going to add in questions regard output on the 4.7L.

I haven't dynoed my truck yet so I'm having to do everything theoretically

I have an original 2001 4.7L, 235hp and 295 ft lbs. of torque

Modifications: K&N filter, Gibson exhaust, Fastman throttle body, NGK v-power spark plugs, 545FRE transmission, Superchip

Vehicle is properly maintained and just had Seafoam clean out the induction and fuel system, didn't have enough for the crankcase.

Does anyone have a math algorithm that could tell me how much my engine is outputing?

 

I moved your post into it's own thread.

 

Stock:

3.660 bore x 3.405 stroke

Horsepower 230@4,600
Torque 290@3,600

For modeling, I'm going to use the Chrysler 273 small block, since the program I use isn't up to date for newgen blocks.

The closest I can get reasonably based on allpar's numbers is 224 @ 4500 and 284 @ 3500. Really not bad for a computer guestimate.

The K&N filter I can't really put in the system, I'd call it one on each scale.

With the headers, the numbers go to 249 @ 4500, 308 @ 3500

fastman TB, 250 @ 4500, 309 @ 3500

Superchips: 268 @ 4500, 338 @ 3500

Again, just computer guestimates.

 

Okay thank you

 

So in the end it should be close to hp 280, tq 350

Any other suggestions, I'll eventually change the diffs to 3.92 or 4.10. I'm trying to get this engine to just squeeze out hp 300, I already reached my wanted tq number of 350 but another 10 or so won't hurt. I can still do a magnaflow cat, cams are too much, is there parts of the truck I can lighten up?

 

That's everything added together, so that last number is where you're at.

the filter adds 1 and 1 roughly, the TB adds 1 and 1 roughly, headers add 19/18, programmer is worth 19/30 or so. again, computer guestimates.

 

Weird considering I know the filter and tb both add a lot more then 1 each, those parts are both dyno tested

 

They may, but the computer can't comprehend that. All I can tell it is that the induction goes from ~450CFM to 525 CFM, figuring the filter is worth 25CFM and TB is worth 50. That's why I call it a guestimate.

 

Interesting... hmmm okay. Thank you, well now I'm so curious I may pay the money for the dyno test. Also magnethead, would you have any suggestions of other stuff I can do to the truck?

 

A cam change would wake it up a bunch (Until you see the price tag), but that's all I can think of for a 4.7.