:o whats the boost and air temp diffs

compared to a kb

 

Not true. The tensioner has NOTHING to do with the belt loads. That's right NOTHING! Well... I should say ultra little technicly speaking because it does help to ensure proper belt wrap.

:Rich smacks head again:

The absolute best example is a 10 speeds chain. (Ignore the cogged effect of the teeth/chain interface as that is there more for reasons other than grip. ((and so is the cross ribbed belts))). A blower belt (and normal FEAD belt) does the exact same thing. The highest loads placed upon the snouts bearings come from accelerative forces combined with the torque required to turn the accessory in question at a given situation.

The very little spring pressure acting on the snout is something like 50-75 lbs at most. While under hard acceleration, high rpms, and a sudden spike (like at a very firm shift) is where it would see in the neighborhood of 700 lbs with a vector pointing approx at the 6:00 position.

FYI: Every 5.4L w/p housing sees 540lbs when at 80% throttle, A/C on, and shifts taking place at about 4200.

Rich

 

Daaaammmmnn.

I'd hate to see Rich when he did intend maliciousness.

 

Back to our regularly scheduled program:

How much $?

How much HP?

 

wydopnthrtl, wouldn't a upshift cause a sudden drop in engine rpm, thus causing a reverse load on the belt (felt on the tensioner side)as it slows the blower, immediately followed by a pull as the engine accelerates the blower again? I would think this would be the highest load the belt would experience, and the time the tensioner would be under the highest load.

For you guys that think the tensioner is the largest force at work, think about this...when you stand on the pedals to accelerate a bicycle you are pulling the rear sprocket forward with a force equal to your weight (if the crank length and sprocket radius are equal.) That's a whole lot more force than the tensioner spring on the deraileur. Granted, a belt needs slightly more tension to maintain belt wrap, but the pulling load on the belt actually provides a 'clamping' force to increase friction WAY past the point provided by the tensioner.

Anyway, back on subject: Am I looking at things backward, or does it look like the MP positions the outlet toward the front of the manifold? Will this utilize the entire intercooler?

 

At WOT the system is pressurized so I think it would use the entire intercooler.

No one answered my question. The magnum powers is supposed to have two bearings in the nose. How many does the stock eaton have and where are they located? I know there is atleast one bearing at the rear of the nose.

 

I feel like that after reading all this tension
The Valium + isn't helping either

HERE'S THE DYNO INFO, GREAT IMFORMATIVE RESULTS FROM JDM
http://www.teamjdm.com/forums/fridge.avi

 

It seems pretty clear to me....
The belt tensioner is just a guide.
The engine only runs one direction....

Its all about contact area (friction) the larger the pulley or the change of angle to gain more contact area will create more grip and hence more downward force on the bearing durring hard acceleration. The ribbed belt is just more surface area.

It is durring the acceleration of RPM that all the forces change and increase. The idler just takes out the whip of the belt and acts as a guide basicaly.

I ain't no engineer and I didn't go to Harvard but I am mechanicaly inclined enough to see what wydopnthrtl is saying. No shot intendid but it does make sense to my way of thinking.

Oh, by the way. Nice blower! Can't wait to hear the debate when you post your results.

 

Those days are past me now.



EZGZ, Yep your correct.




Your thinking along the correct lines. just because the crankshaft suddenly goes from 5000rpms to 3400 rpms does'nt mean that all the other rotating masses instantly do as well. Afterall they are being driven by the belt. But the "reverse load" as you put it is pretty small. Small enough that the tensioner easily accounts for it.


easterisland,
specifically I don't know the answer to your question. However it would'nt take up much room at all to put a bearing that can take a higher load in there. Sometimes just changing the materials used to make the bearing components, or changing the geomety within the bearing is enought to take significantly higher loads.

Rich

 

can you post a link, there is only one kb on ebay and it is new in box? sorry for jackin this thread

 

You guys sound like little bitches fightning over whos daddy is tougher

Im so sick of how all the know it alls on this forum can take somebodys statement and diagnose every little aspect of it and pick it apart word by word. .If half of you knew what you thought you did,youd be dangerous.

 

That's a sweet looking piece of hardware there Bob!

Tell'em like it is Ray!

Jake...

 

 

Originally posted by Tim Skelton
Back to our regularly scheduled program:

How much $?

A price with rotors was in this thread where you also posted
https://www.f150online.com/forums/sh...5&pagenumber=1
I can tell you that I didn't save much using my own rotors.

How much HP?

I can't answer that question, but MM&FF put one on the Fridge and indicated their results a few months back. I'm sure you can still find a copy of that. Other things were changed (tune) at the same time so what did just the blower do, who knows.

Rob_02 posted a link to the Fridge's dyno AVI file a half a dozen posts above your last post.

How much HP does a KB, Eaton or Works add? We all know there are a lot of variables involved. My guess is The MP will add more than a ported Eaton but less than a KB.
I'll let everyone know my results when I have some, but I already know I have to get bigger injectors and a retune at a minimum to accomodate the boost levels I plan to run with this thing. I just went through the same thing with my 03 Cobra and the Apten.

Everyone else, thanks for the props. Hope to see you all at the track this summer.

Lightning Bob

 

I just don't get why no one will say how much without the rotors; the only thing I could guess is that everyone is at FFW. I mean is it like $100 difference or something