Author Topic: 58mm pulley  (Read 5996 times)

Offline PeteG40

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Re: 58mm pulley
« Reply #30 on: August 09, 2011, 11:56:17 am »
they take it out of mounting bracket and off the charger pulley too.

You cant take it out of the charger casing itself as the top one has a bearing in the way and behind that is a counterbalance weight and the bottom one has an oil seal and then a bearing!

Offline Justin14100

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Re: 58mm pulley
« Reply #31 on: August 09, 2011, 12:17:52 pm »
yeah its about 11mm i think, not a huge issue - is there any load on the cover that you need to mill out though?

Offline PeteG40

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Re: 58mm pulley
« Reply #32 on: August 09, 2011, 12:49:43 pm »
dunno, you'd have to find out... though milling the cover, charger pulley and getting hold of the belts for me is a ballache for no gain - i mean if you're going to this trouble - why not fit a wider toothed pulley belt or timing belt as they are just as likely to snap! if not more so!

The top pulley will only be held on the shaft by the same amount of shaft as the original pulley anyway.

Offline GAF2

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Re: 58mm pulley
« Reply #33 on: August 09, 2011, 01:54:17 pm »
Sorry it took me so long Justin, my 58mm pulley has 23 teeth on it.

If you can get the uprated bearings from your supplier pete i would interested in a complete rebuild kit including them and a 1000 length belt too.

Cheers Grant

Offline PeteG40

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Re: 58mm pulley
« Reply #34 on: August 09, 2011, 02:12:22 pm »
am waiting for supplier to get back to me... but have rest of rebuild stuff to hand... club g40 doesnt supply 1000 belts though!

Offline Justin14100

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Re: 58mm pulley
« Reply #35 on: August 09, 2011, 04:29:03 pm »
So you don't think having the wider pullies or belts is worth it then? Sure they'd be quite easy to source here.

Wow. 23 teeth? If you have the rest of the pitstop set that's a 2.26x drive! Amazing.
Here are the 1000 length belts btw.

http://www.amazon.co.uk/gp/aw/d/B002T8V2CG/ref=redir_mdp_mobile/275-6099685-4312206

Offline GAF2

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Re: 58mm pulley
« Reply #36 on: August 09, 2011, 04:41:56 pm »
Yeah i have a the Psd crank and altenator pulleys. So what rpm is the charger doing when the engine is at 6500rpm,
6500x
2.26
=14690rpm?

So that uprated (Bartek) bearings are within spec to handle it. Cheers for the belt link.

I havent tackled a charger rebuild my self so not sure but how many bearings are we talking about? all of them or just the 2 main shaft bearings?

Offline Justin14100

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Re: 58mm pulley
« Reply #37 on: August 09, 2011, 06:04:21 pm »
yeah 14690 is about right, anything over 14,000 is extremely high but with my calculations I've been up to 13,000 for almost 40k now - though i know there is a fine line between a high charger rpm and a dead charger.

If you are planning to run this pulley I would replace every bearing & seal, using the high RPM bearings as well - just to be safe. its a huge amount of force to be putting on the top bearings & the scroll.

Offline GAF2

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Re: 58mm pulley
« Reply #38 on: August 09, 2011, 06:28:30 pm »
Can we get all the bearings required in the higher spec or is it just the two main ones and get the rest of the charger serviced as normal because my charger was serviced just over 1000miles ago at jabba so everything should be ok still.

I have since put my 65mm back on and its just not the same now, i want to be able to run the 58mm all the time and when you factor in the new bearings, the amount of miles i do as its not my daily, now have a standalone oil supply and as pete says 6500 is proberly past peak torque i think it will be worth trying -no?

Offline Justin14100

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Re: 58mm pulley
« Reply #39 on: August 09, 2011, 06:30:19 pm »
If its only had 1k on it only change the top 2 bearings then, how much more thrust did it feel like it had with the 58mm on?

Offline GAF2

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Re: 58mm pulley
« Reply #40 on: August 09, 2011, 06:44:03 pm »
yeah thats what am gonna do then. It was mint with it on, my boost readings nearly doubled and it pulled harder faster if that makes sense. Reckon it will need a chip tho, i think (not totally sure coz i only did bout 10miles) there was a slight flat spot in the the rev range possibly to do with fueling?

Offline PeteG40

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Re: 58mm pulley
« Reply #41 on: August 09, 2011, 09:34:58 pm »
all the other bearings are over that spec anyway as they are oil fed...

however if you get in the chagrer and it has black seals, they are nitrile, so i'd change them for viton, which can handle higher temps.


AS for wider toothed belt - i'd not bother, but i'd put a new one on when the charger is off , and check clearance against the mounting plate... some do catch!