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  #1  
Old August 4th 2011, 23:02
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vdubfund vdubfund is offline
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Steel weighted type 4 pulley

Hi
Can some help me locate a steel pulley for my Type 4 upright conversion??

Cheers
Dean
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  #2  
Old August 5th 2011, 04:53
70Turbobug 70Turbobug is offline
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Hi Dean,
I don´t know anyone that makes a steel pulleys except Remmele that he uses with his 911 fan set up.Why do you want a steel pulley?

Mark
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  #3  
Old August 5th 2011, 08:39
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Mark
Good to hear from you.
Well I was thinking that the extra weight would be better for balancing out the crank and flywheel.
Please let me know.
cheers
Dean
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  #4  
Old August 6th 2011, 12:01
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Arnoud Arnoud is offline
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The German tuner that is going to balance my rotating assembly told me the same:if you're going to machine your own pulley(which I did)then make a steel one-the ass'y runs far smoother on the balancer.
For upright there are only aluminum ones that CSP sells that I know of.

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  #5  
Old August 7th 2011, 14:32
70Turbobug 70Turbobug is offline
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A steel pulley does dampen better and evens out a ceratin amount of harmonic vibrations.I personally believe it is not necessary if the flywheel,crank and pulley have been dynamically balanced together.
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  #6  
Old August 18th 2011, 01:28
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vdubfund vdubfund is offline
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What size pulley?

Here in Osaka the the temp reach 35~7degrees and about 95humidity.

What size pulley should I run with my 11blade 911 fan( 2.0L engine). More stop than go driving here in Japan. Unfortunately!

Advise appreciated

Dean
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  #7  
Old August 18th 2011, 07:51
al_kaholik al_kaholik is offline
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That, I believe, is why the clutch was knackered in my Japanese import when I got it!
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  #8  
Old August 18th 2011, 08:44
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vdubfund vdubfund is offline
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You can almost guarantee it

Anyone running a ahnendorp pulley?(145mm) CSP?(I think is 125mm) is that too small?
LAperformance has a 135mm ??

cheers
Dean
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  #9  
Old August 18th 2011, 12:02
Bruce. Bruce. is offline
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To return to the original question for a moment.....

For upright cooling (T1 fan?) can you not use an alloy T1 pulley but with the centre machined for the T4 fan hub. Is this not the DIY way?

If so, could you not use a steel Berg pulley rather than a cheap alloy T1 pulley?
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  #10  
Old August 19th 2011, 06:49
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Arnoud Arnoud is offline
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Although I'm not aware on how the Cali conversion deals with it(it uses a machined out type 1 lower pulley-right?)the CSP conversion uses an 90mm top pulley to get more offset for the lower pulley.I bought the top pulley from CSP and machined the lower one myself because I wanted it in steel and smaller(in diameter).The CSP top pulley messes with the drive ratio,it makes the fan spin too fast(stock 1600 is 105mm,CSP top pulley 90mm).



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pre-'55 oval:stuffed in a barn
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1973 1303S(soon with Oettinger TSV2000)

Last edited by Arnoud; August 19th 2011 at 10:41. Reason: Added pic's
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  #11  
Old August 19th 2011, 12:26
Bruce. Bruce. is offline
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Re: the top pulley.

I've seen one cali conversion where the (stock) top pulley is reversed to get the correct offset. By using a non oem top pulley the spot welded centre can be removed and welded to the other half, so reversing the pulley.

It does mean the belt doesn't align with the alt bearing tho.
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