Thumper worth it?

[Birchman1310]

I've found some articles but nothing decisive. What is everyone's thoughts on the thumper tensioner. My car is in need due to belt slip but $500 seems crazy.
Has anyone had success with other products?

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[MG0h3]

What’s your pulley setup? Do you have a snub idler?

I run a 2.9 upper and no slip.


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[Rambro]

My buddy has had a upr on his high boost 2.9 whipple for a while now with no issues to my knowledge.

 

[Birchman1310]

My buddy has had a upr on his high boost 2.9 whipple for a while now with no issues to my knowledge.

I've got a 3.0 upper, 4lb lower with 3x100mm idlers on a vmp 2.3 setup. Belt slippage like crazy.

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[01yellercobra]

Where is the tensioner tab sitting? That doesn't sound like an overly aggressive set up.

As for Thump I ran one of their tensioners on my 01 with the F1A. At 19psi there was no indication of slip.

 

[Birchman1310]

Where is the tensioner tab sitting? That doesn't sound like an overly aggressive set up.

As for Thump I ran one of their tensioners on my 01 with the F1A. At 19psi there was no indication of slip.

Just going off what my tuner is telling me. Drops off a cliff at 15psi.

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[MG0h3]

I've got a 3.0 upper, 4lb lower with 3x100mm idlers on a vmp 2.3 setup. Belt slippage like crazy.

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So no snub idler?


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[cj428mach]

That combo should have no issue with belt slip.

 

[Birchman1310]

That combo should have no issue with belt slip.

Two pulls and the boost falls off at 15lbs. Should be closer to 20lbs. Brand new vmp 2.3. The tuner is a very reputable tuner here in the midwest. Idk what else it'd be

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[BLOWN9646]

So no snub idler?


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^THIS

 

[whitedevil95]

What belt length?

 

[cj428mach]

If you don't have a snub idler and your tuner is recommending a $500 fix instead of the $150 fix then he is either incompetent or wants to sell you a more expensive part.

 

[Birchman1310]

If you don't have a snub idler and your tuner is recommending a $500 fix instead of the $150 fix then he is either incompetent or wants to sell you a more expensive part.

He's not selling me anything. It's mike post..... standup tuner.

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[MG0h3]

I still don’t know if you have a snub idler or not.....


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[Birchman1310]

I still don’t know if you have a snub idler or not.....


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No snub idler

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[jwcobra03]

Get the snub idler and problem will be solved. Goodluck.

 

[MG0h3]

Yep.

Take a look at the gap between the two sides of the belt under your upper pulley.

Now imagine it only having a 1/4” gap or less right under the upper pulley.

That’s how much more surface contact you’ll get.


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[jrgoffin]

Roush HD. $125.

Engine

 

[Birchman1310]

Appreciate all of the feedback. I scooped a used snub idler 100mm as well as the thump tensioner. Do it once, be done with it.

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[SVTdreamin04]

Get a Gates RPM Extreme belt as well.


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