3.4L supercharger

Would it not promote longer belt life at least? less tension on the belt would be less hurtful to the belt, or would it not matter seeing as it is doing the same amount of work?

What do you mean you can't go over 180*??? you can easily get over 210* around the pulley ex:

the belt is wrapped around the pulley for greater than 180* of the pulley.

 

Sorry the normal force maxes out there at 180* so you can't go beyond that for normal force.

 

I’m running an aluminum 1.9 pulley now, no slipping!
I do replace the dynamic tensioner every 100k, cost 50.00 or so,
This way I know the spring is always strong keeping the belt tight

 

Ok, normal force is at the most we can get, but would it decrease the pull downward pull on the snout and become more efficient?

 

If you change your supercharger oil every 30k you will get more results,
How often do you change your supercharger oil?

 

When and we’re are you slipping? And is your truck an auto or manual?

 

oil is not even 5k old from pulling apart to check condition

Top end, manual, above 4000-4500 rpm at max throttle. Makes it run richer than I want by maybe .5 afr

 

Giving it some thought, the most friction you will be able to achieve is at 180* since the normal force won't increase and therefore friction won't increase after 180*. I think after 180* you'd be working against yourself.

 

I think you would be working against yourself, just not in the way that is bad for force. I think it would counter some of the force that is making a torque downward, just countering as many degrees over 180 as you have? So all of the torque exerted(not to rotate the pulley, but to pull it down) that has belt exactly opposite would be counteracted?

At this point, I'm going to do this for looks and to be able to change the spring rate for my pulley. Also all I've found online is that more pulley wrap is a cure for belt slippage. Who knows if that is 100% true.

 

In order to make a belt “stick” to the pulley more than 180* around it I think you’d have to do something impossible.

 

It's possible because the pulley has a diameter, else yes if the pulley was a point in space, the belt would interfere with itself. 360* is impossible and 270* is likely near the absolute end of what is possible with pulleys that aren't .5" in diameter.

 

At 270* the belt would be exiting at the angle perpendicular to where it’s entering.

 

Yes, you would need a pulley a little bit smaller than the radius of the supercharger pulley to pull it off, it would be spinning exceedingly fast, around 30k rpm.

Diagram I made to show that >180* is possible:

 

So you’d have to make a pulley with a bearing and shaft small enough to fit in that space that can keep up with the forces on it. I’m not sure of the practicality in that.

Found this after some research.



https://www.slideshare.net/mobile/RicardoGarayReinoso/belt-conveyor-designdunlop

 

Are you selling a 7th injector kit?

 

Broke the dipstick bolt in the alternator bracket a while back. Tried to drill it out again today and realized I fucked up the hole. So I just decided to relocate and I like it better that’s way anyway.

still have a few more bends I need to make but overall has worked out so far.

 

The slipping with a static tensioner is due to the loss of tension on the slack slide of the belt. The dynamic tensioner is able to keep a tension on the slack side. Thats why the dynamic tensioner works better then the static. Remember the belt is a rubber band. When high loads are put to the pull side of the belt, slack side whips back and worth from looseness with static tensioners

 

About half way down this guy explains it better.
https://www.efficientplantmag.com/2007/04/the-fundamentals-extending-drive-belt-life/

 

no

 

Just an update on what can be done with tweeting the supercharger that’s run on methonal, with Stock ECU, Stock injectors, stock fuel pump.
NO 7th injector, NO piggy back, No high flow fuel pump,
I did a Dyno today to see where I stand with stock ECU,stock injectors, just methonal added.

At 6000 feet my boost varies from 10 to 12 pounds depending on the temperature, humidity, barometer pressure, etc.

It was warm today and my boost was on the low end at 10 pounds.
Dyno read 10 pounds when tested actually 9.8 and
The results were 273 hp and 302 pounds of torque at 10 pounds.
Each pound of boost is 12 hp at the rear wheel or so for my truck.
So at 12 pounds my rear wheel is at 297 rear wheel and 326 pounds of torque rear wheel.
Typical my boost is 11 pounds, on a good day 12 pounds on a bad day 10 pounds.

At sea level you can get more boost more power but still the TRD is maxed out around or a little above the 300 mark if setup correctly.

Torque goes straight up right out of the gate almost to max at 2500rpms,
So my rear wheel horses vary from 275-300 depending on the day
and torque 302-325 depending.

Stock 3.4 NON supercharger motor puts around 150 hp at the wheel.
Daily Driver at 635,000 miles.