tolsen

Alternator freewheel pulley - faster gear changes

90 posts in this topic

How many out there have done this mod? Everyone happy?  Where do I find this pulley?

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Posted (edited) · Report post

On 6/21/2018 at 5:05 PM, Willys said:

OK, question as I'm always interested in a HP gain of any kind...lol...damn and i thought I could stay away from it with this car.....augh!!!!!

 

I only manual shift ....up just under 3000rpm and down close to 2000 maybe 1900rpms...simply to get the best fuel consumption rates....and stay under 90 kph on secondary roads.....I can easily get the fuel consumption rate down to 3.6 maybe 3.5 LPHK

 What will this mod do when shifting in manual mode and shifting carefully?  I see it soley for wear and tear on the belt..?  I have never seen a worn out altenator pulley like the one shown.....perhaps they were all steel pulleys?  Why are they alluminium, simply for weight savings or speed to turn the small pulley?  I'm also on the fence about it making much difference if you are making the altenator work in any way. Just spin one by hand and then draw a load from it, it'll drag very quickly and depending upon the load it'll be very hard to turn by hand I bet!  So it's a catch 22 imho, yes it may work if you are not using the altenator as it'll spin freely but if you are demanding power from said altenator then it should help slow the motor down some....imho.....and after saying all this I could also be completely wrong, but this is how my old brain see's it. sorry.

Now, what if you decreased the dia of said pulley? Then what?  Just a thought?

Decreasing the diameter of the pulley would increase the alternator rpm for a given belt speed.

 

To answer my own question, the restrictor plug is to get the thermostat to function more efficiently and get the engine to proper operating temp. I did a 0-100 km/h test last night and it's noticably slower than the video at roughly 21 seconds but I don't think I'm getting quite as good a launch as shown.

 

 

 

Edited by mender

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I just measured diameter over top of the grooves or ridges on an original Smart 451 Cdi pulley:

53.7 mm diameter hence 0.4 mm

less than diameter of INA 535005910

pulley. 

 

Smart 451 Cdi pulley is rather expensive £104 from my local dealer in Aberdeen. 

 

I was smarter and bought pulley complete with alternator for £55 delivered. Came off  a wrecked low mileage 2012 Smart 451 Cdi. 

D503B17A-D986-4E3E-8B42-18BE19648BCC.jpeg

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9 minutes ago, mender said:

Will that fit on the 450?

Yes, since same frame size but have to replace regulator (£27 here) as otherwise it won’t work.   

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3 hours ago, tolsen said:

Yes, since same frame size but have to replace regulator (£27 here) as otherwise it won’t work.   

Isn't the alternator ECU controlled?

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Posted (edited) · Report post

Just started doing some digging.....is this correct...????   Check cross referance to Chrysler  and Jeep...?

 

https://www.amazon.com/VOLVO-Alternator-Freewheel-Clutch-F00M147907/dp/B00C8107SY

 

Then went searching for item, found it cheap.....$32 or close...?

 

Crossed from this listing...

 

https://www.onlinecarparts.co.uk/gates-7743638.html

 

https://www.ebay.com/itm/NEW-CLUTCH-PULLEY-535-0059-10-F-232369-F-00M-147-764-F-00M-147-766-/222706751922

 

 

 

Edited by Willys
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On 03/02/2019 at 0:02 AM, mender said:

Isn't the alternator ECU controlled?

DF comes from glow plug controller but rather thin gauge cable, far too thin in my opinion to carry enough current to energise alternator field.  The other cable connected to alternator’s wee push fit connector is larger gauge and i have concluded it carries battery sense voltage. 

 

One fine day I will connect an oscilloscope to DF and see what signal it carries. 

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5 hours ago, mender said:

Why the need to switch regulators? 

Because they are different and requiring different plugs. 

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Tolsen.....what was the last verdict on this free wheeling clutch pulley....lol.
I am having a hard time locating it over here in the colony.....lol.   

I am venturing over again, this summer for a month perhaps....so could sneak one back in my hand luggage if it is cheaper there...?  Or should I say easier to locate. 
 

Thanks for the knowledge  as usual.....

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INA 535005910 costs typically less than £22 here with free UK except Highlands and Islands delivery.

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Posted (edited) · Report post

Willys

I’m interested as well if we can change it without too much effort.  I’ll square up with you next time I see you.  No rush my car won’t be home before the end of June anyway.

 

Nigel

Edited by Nigel

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