17 replies to this topic

[minivanman8]

How do you guys get the charger belt tight enough to avoid slap?

I can't seem to get enough tension on my belt to stop it.

[jeebz]

Use a shorter belt or use a stretch belt with a slightly higher elastic modulus. 

[minivanman8]

I can't see how a shorter nelt will help as I'd still have to tension it!  I seem to have got it tight enough now :)  Just now strugging with a loud 'tappety' noise which isn't coming from the tappets

[jeebz]

Shorter belt will increase tension. Think of it like a guitar string. Are you trying to move the charger with the belt on to increase tension or are you fixing the pulleys and then rolling on a belt? Also are you using a stretch and tension belt?

[minivanman8]

Its a belt supplied by vmax.  The crank and charger pulleys are obviously fixed and there is a third moveable pulley to tension the belt, hence I can't see how a shorter belt will help any.....I will still have to adjust the third pulley to get the tension.

 

I have now managed to get it tight enough anyway.

 

My concern now is the 'tappety' noise!

[Nick Warwick]

I just lean on the tensioner with my body weight and it usually is about right

[maccers]

Tappety noise, it may be the actual rotors within the charger making this sound?

[minivanman8]

I managed to push on the tensioner with a hammer handle and get it better that way.

Hmm. to be honest a knackered 'charger would almost be the best outcome.

[Nick Warwick]

If you take the charger off and spin it by hand you should be able to feel a clunk if the bearings have gone or the coupler is worn in the nose.

[minivanman8]

Charger span over free and easy when it was off during the engine install....

[Nick Warwick]

Should be ok then, you would be able to feel the clunk when spinning it, is it a supercharger off ebay?

[minivanman8]

No. It came with my van. Originally a Vmax unit.

[Nick Warwick]

Hopefully being a vmax unit it should be fine as i think stuart reconditions them before sale (i think)

 

Can you tell where the noise is coming from? video?

[HUBBA.HUBBA]

I threaded my tensioner bolt in the the alloy of the charger whilst trying to tighten it. I had to tap a new thread, but it was never going to hold as well ever again, so I devised a way of holding the tensioner rock solid and fully adjustable, by using a large marine grade eyelet on a long thread that bolts into a hole already in the charger casing. Works a treat. If your interested I'll take a pic

Edited by HUBBA.HUBBA, 18 September 2013 - 08:00 PM.

[maccers]

I'd be keen to see it! My s/c belt does slap around a bit at higher rpm and is on the standard pulley size.