Whipple Gen5 Belt slip?

[PC 2015]

I think I'm having some belt slip. Does anyone have a psi log graph they can post up for me. Here is mine. Dont have anything to compare it to. So I dont know if this is how its supposed to look. But I feel like it shouldn't be jumping up and down so much. It's the red line going from 15 to 11psi

Thanks
Joe

Sponsored

 

[markmurfie]

I would try a inline snubber in the reference line to your sensor, before trying to fix belt slip. The Lund boost box is a very sensitive sensor and it only gets worst the higher the pressure goes.

 

[Draklia]

Is “sensitive” the new politically correct way of saying “inaccurate”? I mean is the op really fluctuating between 11-15 psi, and that the boost box is just so sensitive that it can display what’s really going on?

 

[pro 5.0]

Mechanical gauge would tell the tale.

 

[markmurfie]

Sensitive to fluctuations like a hammering effect and inaccurate are not the same at all.

Looking at manifold pressure to deduce belt slip is a very poor way to go about it. There are way too many factors that can vary manifold pressure or our side of belt slip.

A better way to determine belt slip would be to design pulleys that had a built in exciter ring and use a hall effect sensor on that. Then just compare the pulley RPM directly to the engines RPM.

 

[pro 5.0]

I would try a inline snubber in the reference line to your sensor, before trying to fix belt slip. The Lund boost box is a very sensitive sensor and it only gets worst the higher the pressure goes.

Here is a analog 1 psi reading both cars have the Lund boost box omega, Whipple vs Turbo I'd say you have a belt slip issue.

 

[markmurfie]

You could do the same comparison with MAF sensor signals and get opposite results between turbo and whipple. The sensors placement in relation to where the air is being compressed matters a lot of how much hammering effect the sensor sees.

Again way too many variables behind airflow and map pressure to point at belt slip solely as the cause.

 

[pro 5.0]

I know of the car in question there is black dust below the blower pulley, not arguing but there is a reason a 10 rib belt system was designed more contact surface.

 

[markmurfie]

For a 1850$ upgrade, I'm surprised there are no back to back comparisons done by vendors 6 rib vs 10 rib. It would be interesting to see differences in results with some of the smaller pulley sizes or even the larger ones. I'm sure 10 helps and is better everywhere, but where do you really need to upgrade and where 6 rib and 10 rib are nearly equal?

 

[pro 5.0]

We use to take the blower pulley and machine grooves 90 deg to the serpentine grooves then media blast the surface, worked like a hot damn but belts would start to squeal after a while and need to be replaced.

 

[DavidHuff]

Cheap Fix:Remove the supercharger pulley and just bead blast the pulley grooves only.

 

[PC 2015]

Here a little comparison. Did a hit today with my 3.25 griptech. I'll be making a full pass tonight and will post them side by side. But wanted to put this up for now.

 

[pro 5.0]

Maybe the wind was blowing in a different direction when you did that log as you can't possibly have belt slip LMAO.

 

[PC 2015]

Maybe the wind was blowing in a different direction when you did that log as you can't possibly have belt slip LMAO.

Lmao

 

[olaosunt]

How did it go ?

Sponsored