[DeTomaso] Crank Pulley Needed???? Got one!

[Steve Liebenow]

Hey all!
OK, after many responses, and double checking my eyeballs several times....... the conclusion!   I have a funky "incorrectly machined" OEM crank pulley!!!     Instead of the "normal" one 12mm sheave and one 11mm sheave, I have two 12mm sheaves! Honest!  My slide caliper cannot tell a lie!

I also located a properly machined pulley for my car from a fellow local-ish club member! Thank-you!!!

While this mismatch is not really an issue for regular stock configuration, it is a problem when trying to adapt the "bump reduction kit" from Amerisport which calls for a specific smaller 11mm width belt to connect the crank to the water pump.  Having the 12mm groove in the crank pulley frogs up that plan!  Options?  Smaller belt, by 5mm?   No idea what is available in that arena, as Google seems to have lost the ability to search for metric belt sizes rather than manufacturer part numbers.   Can't even find a steeenking interchange chart.....!  Something has changed in the internet universe......  Oh wait, perhaps I need to upgrade to GOogle+++ for $199 a month to get FULL service internet..... I digress.
Other option is running a belt tensioning kit from Ipsco and perhaps PPC Colorado.  You don't need much tension at all.....just enough to keep the belt from flapping around excessively.    We'll see how this belt in the kit fits once I get a proper pulley installed.
I was informed that Ipsco carries "stock dimension" crank pulleys now, machined from billet alloy AND even has two different sheave widths!!! Imagine that!!!!   They have a matching water pump pulley also, as well as a slightly under sized version to allow the water pump to spin slightly faster, as did the normal config for water pump pulleys in standard Ford cars and trucks. Not a bad concept!   ipsco.org/newsite/'product
Thanks to all for the feedback!  Good stuff!
Cheers!
Steve


-------------- next part --------------
   Hey all!
   OK, after many responses, and double checking my eyeballs several
   times....... the conclusion!   I have a funky "incorrectly machined"
   OEM crank pulley!!!     Instead of the "normal" one 12mm sheave and one
   11mm sheave, I have two 12mm sheaves! Honest!  My slide caliper cannot
   tell a lie!
   I also located a properly machined pulley for my car from a fellow
   local-ish club member! Thank-you!!!
   While this mismatch is not really an issue for regular stock
   configuration, it is a problem when trying to adapt the "bump reduction
   kit" from Amerisport which calls for a specific smaller 11mm width belt
   to connect the crank to the water pump.  Having the 12mm groove in the
   crank pulley frogs up that plan!  Options?  Smaller belt, by 5mm?   No
   idea what is available in that arena, as Google seems to have lost the
   ability to search for metric belt sizes rather than manufacturer part
   numbers.   Can't even find a steeenking interchange chart.....!
   Something has changed in the internet universe......  Oh wait, perhaps
   I need to upgrade to GOogle+++ for $199 a month to get FULL service
   internet..... I digress.
   Other option is running a belt tensioning kit from Ipsco and perhaps
   PPC Colorado.  You don't need much tension at all.....just enough to
   keep the belt from flapping around excessively.    We'll see how this
   belt in the kit fits once I get a proper pulley installed.
   I was informed that Ipsco carries "stock dimension" crank pulleys now,
   machined from billet alloy AND even has two different sheave widths!!!
   Imagine that!!!!   They have a matching water pump pulley also, as well
   as a slightly under sized version to allow the water pump to spin
   slightly faster, as did the normal config for water pump pulleys in
   standard Ford cars and trucks. Not a bad concept!
   ipsco.org/newsite/'product
   Thanks to all for the feedback!  Good stuff!
   Cheers!
   Steve