I've been using a 3.8" pulley around 2 months



and it looks like I will need to replace it sooner than expected


The rear edge has developed some fraying and I have not even been to the track yet. Last time I hitted the track with the 5" 6 ribs pulley my belt was toasted too
I really don't like the 6 ribs pulley system that much. I think it's costing me some top end boost and some mid range response.

I am currently working with a machinist to make a set of teeth pullies. He's a very nice and knowledgable engineer too. He promised to help but is tied up with his work for the next 2 months. He asked me to work out the distance between the centre of each pullies in the sc system. He will use this info to work out the optimal SC and crank pulley sizes for maximal impeller speed. He will need this within 0.5-1 mm of accuracy too

I won't have time to do this until close to christmas as this prob involves taking the SC off and mounting it on my friend's damaged engine in the garage and measure all of the distance between the pullies. Knowing how good I am at measuring something with this amount of accuracy I will need your help.

If anyone is sick of tensioning or replacing the the current V-ribs belt too often and want to upgrade to a tooth belt, please express your interest here. A tooth belt may prob give you more or better midrange response too. If your engine is stock you won't need a supercharger pulley that give you max impeller speed in the V2 All you have to do is get the same crank pulley as mine and a larger sc pulley than mine.

Now:
Would any one has this sort of information or can access this information with ease?
Does anyone have an unassemble SC system lying around that you could do some measurement?

 

Some more info and questions
The Vortech setup


what are the distances between the centres of these pullies with the tensioner pulley in min and max tension locations?



[B]what is the size of the gap between the crank and the water pump pullies?[B]


According to vortech, the V2 SQ has a max impeller speed of 53,000

Here is the link to calculate impeller speed vs pulley size
http://www.vortechsuperchargers.com/...pspeedv-2.html
The current crank pulley is 6".

 

My guess is that either your crank or blower pulley is out of alignment causing the fraying, that would definately chew up your belt!
Look at your first pic, your belt is crawling up the side of the pulley leaving a gap on the other side !

 

Your pictures indicate a pulley alignment problem. I've been running the original belt on a Vortech equiped car now for 20K miles, and it's still fine. Also, be advised that a cog belt setup on a standard SQ head unit is trouble waiting to happen. If you check Vortech's website, you'll find that for cog setups they only recommend "heavy duty"head units. If I remember correctly, these come with upgraded bearings, and straight-cut gears to withstand the additional loadings produced by a cog belt setup.

 

yes both of you are right
The bolt holding the supercharger pulley got loosen after the first dyno tune. I've retightened but it was engouh to cause some fraying and the process worsened since.

s2kmayhem, I agree with the you that the cog belt will put a huge amount of extra stress on the whole SC assembly. The V belt slipage is not great for boost or throttle response but it acts as a clutch to absorp some of these stress. Do you remember whether that warning was specifically for the V2SQ?

 

some how I can't use the pm function atm
for the person who pm me
I am getting 14psi at 9.5krpm atm

 

I'm betting if you want any more boost beyond 15psi, you'll have to upgrade to a toothed/cogged belt to eliminate belt slippage. But as it's allready been pointed out, The T-trim vortech's are reccomended to use a cogged belt. I've got a friend with a T-trim on a B18C Civic, That is going to be running 19-20psi. He's using an 8-rib belt. His T-trim's housing is identical to my V2SQ, it will fit the existing brackets.

My biggest complaint with the belt on the Vortech is the tensioner. It is a pain in the ass to reach. Whatever you end up doing, move the tensioner to the oppposite side of the belt where you can reach it.

 

My recollection is that the warning was for all standard internal A, B, S, SQ & T trim blowers. Your best bet is to check out their website, and maybe give their tech line a call. If your going to go ahead with a cog setup, I"m pretty sure most head units can be sent to them to be upgraded with the stouter internals.

 

http://www.vortechsuperchargers.com/produc...erformance.html

It looks like the SC has to marked for "HD" use to run a cogged belt.

 

slows2k, not only that the tensioner is in a difficult spot to reach it's also on the wrong side for clockwise-rotated engine. Most supercharger tensioners are on the left side of the superchargers...unless the engine spin anticlockwise !

Does anyone know why vortech design it this way? There must be a reason for them to do this